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eded6438 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 regenerate_metadata(int argc, const char **argv); | |
c2561365 | 35 | static int regenerate_statedump(int argc, const char **argv); |
eded6438 | 36 | |
4fc83d94 PP |
37 | #ifdef LTTNG_EMBED_HELP |
38 | static const char help_msg[] = | |
39 | #include <lttng-regenerate.1.h> | |
40 | ; | |
41 | #endif | |
42 | ||
eded6438 JD |
43 | enum { |
44 | OPT_HELP = 1, | |
45 | OPT_LIST_OPTIONS, | |
46 | OPT_LIST_COMMANDS, | |
47 | }; | |
48 | ||
49 | static struct mi_writer *writer; | |
50 | ||
51 | static struct poptOption long_options[] = { | |
52 | /* { longName, shortName, argInfo, argPtr, value, descrip, argDesc, } */ | |
53 | { "help", 'h', POPT_ARG_NONE, 0, OPT_HELP, 0, 0, }, | |
54 | { "session", 's', POPT_ARG_STRING, &opt_session_name, 0, 0, 0}, | |
55 | { "list-options", 0, POPT_ARG_NONE, NULL, OPT_LIST_OPTIONS, 0, 0, }, | |
56 | { "list-commands", 0, POPT_ARG_NONE, NULL, OPT_LIST_COMMANDS}, | |
57 | { 0, 0, 0, 0, 0, 0, 0, }, | |
58 | }; | |
59 | ||
60 | static struct cmd_struct actions[] = { | |
61 | { "metadata", regenerate_metadata }, | |
c2561365 | 62 | { "statedump", regenerate_statedump }, |
eded6438 JD |
63 | { NULL, NULL } /* Array closure */ |
64 | }; | |
65 | ||
66 | /* | |
67 | * Count and return the number of arguments in argv. | |
68 | */ | |
69 | static int count_arguments(const char **argv) | |
70 | { | |
71 | int i = 0; | |
72 | ||
73 | assert(argv); | |
74 | ||
75 | while (argv[i] != NULL) { | |
76 | i++; | |
77 | } | |
78 | ||
79 | return i; | |
80 | } | |
81 | ||
82 | static int regenerate_metadata(int argc, const char **argv) | |
83 | { | |
84 | int ret; | |
85 | ||
86 | if (argc > 1) { | |
fcf3687f | 87 | ret = CMD_UNDEFINED; |
eded6438 JD |
88 | goto end; |
89 | } | |
90 | ret = lttng_regenerate_metadata(session_name); | |
91 | if (ret == 0) { | |
92 | MSG("Metadata successfully regenerated for session %s", session_name); | |
fcf3687f JG |
93 | } else { |
94 | ERR("%s", lttng_strerror(ret)); | |
eded6438 JD |
95 | } |
96 | ||
97 | end: | |
98 | return ret; | |
99 | } | |
100 | ||
c2561365 JD |
101 | static int regenerate_statedump(int argc, const char **argv) |
102 | { | |
103 | int ret; | |
104 | ||
105 | if (argc > 1) { | |
106 | ret = -LTTNG_ERR_INVALID; | |
107 | goto end; | |
108 | } | |
109 | ret = lttng_regenerate_statedump(session_name); | |
110 | if (ret == 0) { | |
111 | MSG("State dump successfully regenerated for session %s", session_name); | |
112 | } | |
113 | ||
114 | end: | |
115 | return ret; | |
116 | } | |
117 | ||
eded6438 JD |
118 | static int handle_command(const char **argv) |
119 | { | |
120 | struct cmd_struct *cmd; | |
121 | int ret = CMD_SUCCESS, i = 0, argc, command_ret = CMD_SUCCESS; | |
122 | ||
123 | if (argv == NULL) { | |
fcf3687f | 124 | ERR("No object specified for regenerate command."); |
eded6438 JD |
125 | command_ret = CMD_ERROR; |
126 | goto end; | |
127 | } | |
128 | ||
129 | argc = count_arguments(argv); | |
130 | ||
131 | cmd = &actions[i]; | |
132 | while (cmd->func != NULL) { | |
133 | /* Find command */ | |
134 | if (strcmp(argv[0], cmd->name) == 0) { | |
135 | if (lttng_opt_mi) { | |
136 | /* Action element */ | |
137 | ret = mi_lttng_writer_open_element(writer, | |
138 | mi_lttng_element_command_regenerate_action); | |
139 | if (ret) { | |
140 | ret = CMD_ERROR; | |
141 | goto end; | |
142 | } | |
143 | ||
144 | /* Name of the action */ | |
145 | ret = mi_lttng_writer_write_element_string(writer, | |
146 | config_element_name, argv[0]); | |
147 | if (ret) { | |
148 | ret = CMD_ERROR; | |
149 | goto end; | |
150 | } | |
151 | } | |
152 | command_ret = cmd->func(argc, argv); | |
153 | if (lttng_opt_mi) { | |
154 | /* Close output and action element */ | |
155 | ret = mi_lttng_writer_close_element(writer); | |
156 | if (ret) { | |
157 | ret = CMD_ERROR; | |
158 | goto end; | |
159 | } | |
160 | } | |
161 | goto end; | |
162 | } | |
163 | ||
164 | cmd = &actions[i++]; | |
165 | } | |
166 | ||
167 | ret = CMD_UNDEFINED; | |
168 | ||
169 | end: | |
170 | /* Overwrite ret if an error occurred in cmd->func() */ | |
171 | ret = command_ret ? command_ret : ret; | |
172 | return ret; | |
173 | } | |
174 | ||
175 | /* | |
176 | * regenerate command handling. | |
177 | */ | |
178 | int cmd_regenerate(int argc, const char **argv) | |
179 | { | |
180 | int opt, ret = CMD_SUCCESS, command_ret = CMD_SUCCESS, success = 1; | |
181 | static poptContext pc; | |
182 | ||
183 | if (argc < 1) { | |
184 | SHOW_HELP(); | |
185 | ret = CMD_ERROR; | |
186 | goto end; | |
187 | } | |
188 | ||
189 | pc = poptGetContext(NULL, argc, argv, long_options, 0); | |
190 | poptReadDefaultConfig(pc, 0); | |
191 | ||
192 | if (lttng_opt_mi) { | |
193 | writer = mi_lttng_writer_create(fileno(stdout), lttng_opt_mi); | |
194 | if (!writer) { | |
195 | ret = -LTTNG_ERR_NOMEM; | |
196 | goto end; | |
197 | } | |
198 | /* Open command element */ | |
199 | ret = mi_lttng_writer_command_open(writer, | |
200 | mi_lttng_element_command_regenerate); | |
201 | if (ret) { | |
202 | ret = CMD_ERROR; | |
203 | goto end; | |
204 | } | |
205 | ||
206 | /* Open output element */ | |
207 | ret = mi_lttng_writer_open_element(writer, | |
208 | mi_lttng_element_command_output); | |
209 | if (ret) { | |
210 | ret = CMD_ERROR; | |
211 | goto end; | |
212 | } | |
213 | } | |
214 | ||
215 | while ((opt = poptGetNextOpt(pc)) != -1) { | |
216 | switch (opt) { | |
217 | case OPT_HELP: | |
218 | SHOW_HELP(); | |
219 | goto end; | |
220 | case OPT_LIST_OPTIONS: | |
221 | list_cmd_options(stdout, long_options); | |
222 | goto end; | |
223 | case OPT_LIST_COMMANDS: | |
224 | list_commands(actions, stdout); | |
225 | goto end; | |
226 | default: | |
227 | SHOW_HELP(); | |
228 | ret = CMD_UNDEFINED; | |
229 | goto end; | |
230 | } | |
231 | } | |
232 | ||
233 | if (!opt_session_name) { | |
234 | session_name = get_session_name(); | |
235 | if (session_name == NULL) { | |
236 | ret = CMD_ERROR; | |
237 | goto end; | |
238 | } | |
239 | } else { | |
240 | session_name = opt_session_name; | |
241 | } | |
242 | ||
243 | command_ret = handle_command(poptGetArgs(pc)); | |
244 | if (command_ret) { | |
fcf3687f | 245 | success = 0; |
eded6438 JD |
246 | } |
247 | ||
248 | if (lttng_opt_mi) { | |
249 | /* Close output element */ | |
250 | ret = mi_lttng_writer_close_element(writer); | |
251 | if (ret) { | |
252 | ret = CMD_ERROR; | |
253 | goto end; | |
254 | } | |
255 | ||
256 | /* Success ? */ | |
257 | ret = mi_lttng_writer_write_element_bool(writer, | |
258 | mi_lttng_element_command_success, success); | |
259 | if (ret) { | |
260 | ret = CMD_ERROR; | |
261 | goto end; | |
262 | } | |
263 | ||
264 | /* Command element close */ | |
265 | ret = mi_lttng_writer_command_close(writer); | |
266 | if (ret) { | |
267 | ret = CMD_ERROR; | |
268 | goto end; | |
269 | } | |
270 | } | |
271 | ||
272 | end: | |
273 | /* Mi clean-up */ | |
274 | if (writer && mi_lttng_writer_destroy(writer)) { | |
275 | /* Preserve original error code */ | |
276 | ret = ret ? ret : -LTTNG_ERR_MI_IO_FAIL; | |
277 | } | |
278 | ||
279 | if (!opt_session_name) { | |
280 | free(session_name); | |
281 | } | |
282 | ||
283 | /* Overwrite ret if an error occurred during handle_command() */ | |
284 | ret = command_ret ? command_ret : ret; | |
285 | ||
286 | poptFreeContext(pc); | |
287 | return ret; | |
288 | } |