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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 | ||
4fc83d94 PP |
36 | #ifdef LTTNG_EMBED_HELP |
37 | static const char help_msg[] = | |
38 | #include <lttng-metadata.1.h> | |
39 | ; | |
40 | #endif | |
41 | ||
93ec662e JD |
42 | enum { |
43 | OPT_HELP = 1, | |
44 | OPT_LIST_OPTIONS, | |
45 | OPT_LIST_COMMANDS, | |
46 | }; | |
47 | ||
54897b57 JD |
48 | static struct mi_writer *writer; |
49 | ||
93ec662e JD |
50 | static struct poptOption long_options[] = { |
51 | /* { longName, shortName, argInfo, argPtr, value, descrip, argDesc, } */ | |
52 | { "help", 'h', POPT_ARG_NONE, 0, OPT_HELP, 0, 0, }, | |
53 | { "session", 's', POPT_ARG_STRING, &opt_session_name, 0, 0, 0}, | |
54 | { "list-options", 0, POPT_ARG_NONE, NULL, OPT_LIST_OPTIONS, 0, 0, }, | |
55 | { "list-commands", 0, POPT_ARG_NONE, NULL, OPT_LIST_COMMANDS}, | |
56 | { 0, 0, 0, 0, 0, 0, 0, }, | |
57 | }; | |
58 | ||
59 | static struct cmd_struct actions[] = { | |
60 | { "regenerate", metadata_regenerate }, | |
61 | { NULL, NULL } /* Array closure */ | |
62 | }; | |
63 | ||
93ec662e JD |
64 | /* |
65 | * Count and return the number of arguments in argv. | |
66 | */ | |
67 | static int count_arguments(const char **argv) | |
68 | { | |
69 | int i = 0; | |
70 | ||
71 | assert(argv); | |
72 | ||
73 | while (argv[i] != NULL) { | |
74 | i++; | |
75 | } | |
76 | ||
77 | return i; | |
78 | } | |
79 | ||
80 | static int metadata_regenerate(int argc, const char **argv) | |
81 | { | |
82 | int ret; | |
83 | ||
fb288d1e JD |
84 | if (argc > 1) { |
85 | ret = -LTTNG_ERR_INVALID; | |
86 | goto end; | |
87 | } | |
eded6438 | 88 | ret = lttng_regenerate_metadata(session_name); |
93ec662e JD |
89 | if (ret == 0) { |
90 | MSG("Metadata successfully regenerated for session %s", session_name); | |
91 | } | |
fb288d1e JD |
92 | |
93 | end: | |
93ec662e JD |
94 | return ret; |
95 | } | |
96 | ||
97 | static int handle_command(const char **argv) | |
98 | { | |
99 | struct cmd_struct *cmd; | |
100 | int ret = CMD_SUCCESS, i = 0, argc, command_ret = CMD_SUCCESS; | |
101 | ||
102 | if (argv == NULL) { | |
cfd1353e | 103 | ERR("argv is null"); |
93ec662e JD |
104 | command_ret = CMD_ERROR; |
105 | goto end; | |
106 | } | |
107 | ||
108 | argc = count_arguments(argv); | |
109 | ||
110 | cmd = &actions[i]; | |
111 | while (cmd->func != NULL) { | |
112 | /* Find command */ | |
113 | if (strcmp(argv[0], cmd->name) == 0) { | |
54897b57 JD |
114 | if (lttng_opt_mi) { |
115 | /* Action element */ | |
116 | ret = mi_lttng_writer_open_element(writer, | |
117 | mi_lttng_element_command_metadata_action); | |
118 | if (ret) { | |
119 | ret = CMD_ERROR; | |
120 | goto end; | |
121 | } | |
122 | ||
123 | /* Name of the action */ | |
124 | ret = mi_lttng_writer_write_element_string(writer, | |
125 | config_element_name, argv[0]); | |
126 | if (ret) { | |
127 | ret = CMD_ERROR; | |
128 | goto end; | |
129 | } | |
130 | } | |
93ec662e | 131 | command_ret = cmd->func(argc, argv); |
54897b57 JD |
132 | if (lttng_opt_mi) { |
133 | /* Close output and action element */ | |
134 | ret = mi_lttng_writer_close_element(writer); | |
135 | if (ret) { | |
136 | ret = CMD_ERROR; | |
137 | goto end; | |
138 | } | |
139 | } | |
93ec662e JD |
140 | goto end; |
141 | } | |
142 | ||
143 | cmd = &actions[i++]; | |
144 | } | |
145 | ||
146 | ret = CMD_UNDEFINED; | |
147 | ||
148 | end: | |
149 | /* Overwrite ret if an error occurred in cmd->func() */ | |
150 | ret = command_ret ? command_ret : ret; | |
151 | return ret; | |
152 | } | |
153 | ||
154 | /* | |
155 | * Metadata command handling. | |
156 | */ | |
157 | int cmd_metadata(int argc, const char **argv) | |
158 | { | |
54897b57 | 159 | int opt, ret = CMD_SUCCESS, command_ret = CMD_SUCCESS, success = 1; |
93ec662e JD |
160 | static poptContext pc; |
161 | ||
162 | if (argc < 1) { | |
3b9c7d3f | 163 | SHOW_HELP(); |
93ec662e JD |
164 | ret = CMD_ERROR; |
165 | goto end; | |
166 | } | |
167 | ||
168 | pc = poptGetContext(NULL, argc, argv, long_options, 0); | |
169 | poptReadDefaultConfig(pc, 0); | |
170 | ||
54897b57 JD |
171 | if (lttng_opt_mi) { |
172 | writer = mi_lttng_writer_create(fileno(stdout), lttng_opt_mi); | |
173 | if (!writer) { | |
174 | ret = -LTTNG_ERR_NOMEM; | |
175 | goto end; | |
176 | } | |
177 | /* Open command element */ | |
178 | ret = mi_lttng_writer_command_open(writer, | |
179 | mi_lttng_element_command_metadata); | |
180 | if (ret) { | |
181 | ret = CMD_ERROR; | |
182 | goto end; | |
183 | } | |
184 | ||
185 | /* Open output element */ | |
186 | ret = mi_lttng_writer_open_element(writer, | |
187 | mi_lttng_element_command_output); | |
188 | if (ret) { | |
189 | ret = CMD_ERROR; | |
190 | goto end; | |
191 | } | |
192 | } | |
193 | ||
93ec662e JD |
194 | while ((opt = poptGetNextOpt(pc)) != -1) { |
195 | switch (opt) { | |
196 | case OPT_HELP: | |
3b9c7d3f | 197 | SHOW_HELP(); |
93ec662e JD |
198 | goto end; |
199 | case OPT_LIST_OPTIONS: | |
200 | list_cmd_options(stdout, long_options); | |
201 | goto end; | |
202 | case OPT_LIST_COMMANDS: | |
203 | list_commands(actions, stdout); | |
204 | goto end; | |
205 | default: | |
3b9c7d3f | 206 | SHOW_HELP(); |
93ec662e JD |
207 | ret = CMD_UNDEFINED; |
208 | goto end; | |
209 | } | |
210 | } | |
211 | ||
212 | if (!opt_session_name) { | |
213 | session_name = get_session_name(); | |
214 | if (session_name == NULL) { | |
215 | ret = CMD_ERROR; | |
216 | goto end; | |
217 | } | |
218 | } else { | |
219 | session_name = opt_session_name; | |
220 | } | |
221 | ||
222 | command_ret = handle_command(poptGetArgs(pc)); | |
223 | if (command_ret) { | |
224 | switch (-command_ret) { | |
225 | default: | |
226 | ERR("%s", lttng_strerror(command_ret)); | |
54897b57 | 227 | success = 0; |
93ec662e JD |
228 | break; |
229 | } | |
230 | } | |
231 | ||
54897b57 JD |
232 | if (lttng_opt_mi) { |
233 | /* Close output element */ | |
234 | ret = mi_lttng_writer_close_element(writer); | |
235 | if (ret) { | |
236 | ret = CMD_ERROR; | |
237 | goto end; | |
238 | } | |
239 | ||
240 | /* Success ? */ | |
241 | ret = mi_lttng_writer_write_element_bool(writer, | |
242 | mi_lttng_element_command_success, success); | |
243 | if (ret) { | |
244 | ret = CMD_ERROR; | |
245 | goto end; | |
246 | } | |
247 | ||
248 | /* Command element close */ | |
249 | ret = mi_lttng_writer_command_close(writer); | |
250 | if (ret) { | |
251 | ret = CMD_ERROR; | |
252 | goto end; | |
253 | } | |
254 | } | |
255 | ||
93ec662e | 256 | end: |
54897b57 JD |
257 | /* Mi clean-up */ |
258 | if (writer && mi_lttng_writer_destroy(writer)) { | |
259 | /* Preserve original error code */ | |
260 | ret = ret ? ret : -LTTNG_ERR_MI_IO_FAIL; | |
261 | } | |
262 | ||
93ec662e JD |
263 | if (!opt_session_name) { |
264 | free(session_name); | |
265 | } | |
266 | ||
267 | /* Overwrite ret if an error occurred during handle_command() */ | |
268 | ret = command_ret ? command_ret : ret; | |
269 | ||
270 | poptFreeContext(pc); | |
271 | return ret; | |
272 | } |