Commit | Line | Data |
---|---|---|
3087ef18 | 1 | /* |
21cf9b6b | 2 | * Copyright (C) 2011 EfficiOS Inc. |
3087ef18 | 3 | * |
ab5be9fa | 4 | * SPDX-License-Identifier: GPL-2.0-only |
3087ef18 | 5 | * |
3087ef18 DG |
6 | */ |
7 | ||
6c1c0768 | 8 | #define _LGPL_SOURCE |
3087ef18 DG |
9 | #include <popt.h> |
10 | #include <stdio.h> | |
11 | #include <stdlib.h> | |
12 | #include <string.h> | |
13 | #include <sys/stat.h> | |
14 | #include <sys/types.h> | |
15 | #include <unistd.h> | |
ce91cd0b | 16 | |
c9e313bc | 17 | #include <common/mi-lttng.hpp> |
3087ef18 | 18 | |
c9e313bc | 19 | #include "../command.hpp" |
3087ef18 | 20 | |
4fc83d94 PP |
21 | #ifdef LTTNG_EMBED_HELP |
22 | static const char help_msg[] = | |
23 | #include <lttng-set-session.1.h> | |
24 | ; | |
25 | #endif | |
26 | ||
3087ef18 DG |
27 | enum { |
28 | OPT_HELP = 1, | |
679b4943 | 29 | OPT_LIST_OPTIONS, |
3087ef18 DG |
30 | }; |
31 | ||
ce91cd0b JRJ |
32 | static struct mi_writer *writer; |
33 | ||
3087ef18 DG |
34 | static struct poptOption long_options[] = { |
35 | /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */ | |
36 | {"help", 'h', POPT_ARG_NONE, 0, OPT_HELP, 0, 0}, | |
679b4943 | 37 | {"list-options", 0, POPT_ARG_NONE, NULL, OPT_LIST_OPTIONS, NULL, NULL}, |
3087ef18 DG |
38 | {0, 0, 0, 0, 0, 0, 0} |
39 | }; | |
40 | ||
ce91cd0b JRJ |
41 | /* |
42 | * Print the necessary mi for a session and name. | |
43 | */ | |
5b915816 | 44 | static int mi_print(const char *session_name) |
ce91cd0b JRJ |
45 | { |
46 | int ret; | |
47 | ||
a0377dfe FD |
48 | LTTNG_ASSERT(writer); |
49 | LTTNG_ASSERT(session_name); | |
ce91cd0b JRJ |
50 | |
51 | /* | |
52 | * Open a sessions element | |
53 | * This is purely for validation purpose | |
54 | */ | |
55 | ret = mi_lttng_sessions_open(writer); | |
56 | if (ret) { | |
57 | goto end; | |
58 | } | |
59 | ||
60 | /* Open a session element */ | |
61 | ret = mi_lttng_writer_open_element(writer, config_element_session); | |
62 | if (ret) { | |
63 | goto end; | |
64 | } | |
65 | ||
66 | /* Session name */ | |
67 | ret = mi_lttng_writer_write_element_string(writer , config_element_name, | |
68 | session_name); | |
69 | if (ret) { | |
70 | goto end; | |
71 | } | |
72 | ||
73 | /* Close session and sessions element */ | |
74 | ret = mi_lttng_close_multi_element(writer, 2); | |
75 | if (ret) { | |
76 | goto end; | |
77 | } | |
78 | end: | |
79 | return ret; | |
80 | } | |
81 | ||
3087ef18 DG |
82 | /* |
83 | * set_session | |
84 | */ | |
5b915816 | 85 | static int set_session(const char *session_name) |
3087ef18 DG |
86 | { |
87 | int ret = CMD_SUCCESS; | |
7f0c090d PPM |
88 | int count, i; |
89 | unsigned int session_found = 0; | |
90 | struct lttng_session *sessions; | |
3087ef18 | 91 | |
5b915816 | 92 | if (session_name && strlen(session_name) > NAME_MAX) { |
487b253b DG |
93 | ERR("Session name too long. Length must be lower or equal to %d", |
94 | NAME_MAX); | |
95 | ret = CMD_ERROR; | |
7f0c090d PPM |
96 | goto end; |
97 | } | |
98 | ||
99 | count = lttng_list_sessions(&sessions); | |
100 | if (count < 0) { | |
101 | ret = CMD_ERROR; | |
102 | ERR("%s", lttng_strerror(count)); | |
103 | goto end; | |
104 | } | |
105 | ||
106 | for (i = 0; i < count; i++) { | |
5b915816 | 107 | if (strncmp(sessions[i].name, session_name, NAME_MAX) == 0) { |
7f0c090d PPM |
108 | session_found = 1; |
109 | break; | |
110 | } | |
111 | } | |
112 | ||
113 | if (!session_found) { | |
5b915816 | 114 | ERR("Session '%s' not found", session_name); |
7f0c090d | 115 | ret = CMD_ERROR; |
487b253b DG |
116 | goto error; |
117 | } | |
118 | ||
5b915816 | 119 | ret = config_init(session_name); |
3087ef18 | 120 | if (ret < 0) { |
fffd0547 | 121 | ERR("Unable to set session name"); |
3087ef18 DG |
122 | ret = CMD_ERROR; |
123 | goto error; | |
124 | } | |
125 | ||
5b915816 | 126 | MSG("Session set to %s", session_name); |
ce91cd0b | 127 | if (lttng_opt_mi) { |
5b915816 | 128 | ret = mi_print(session_name); |
ce91cd0b JRJ |
129 | if (ret) { |
130 | ret = CMD_ERROR; | |
131 | goto error; | |
132 | } | |
133 | } | |
134 | ||
3087ef18 DG |
135 | ret = CMD_SUCCESS; |
136 | ||
137 | error: | |
7f0c090d PPM |
138 | free(sessions); |
139 | end: | |
3087ef18 DG |
140 | return ret; |
141 | } | |
142 | ||
143 | /* | |
144 | * cmd_set_session | |
145 | */ | |
146 | int cmd_set_session(int argc, const char **argv) | |
147 | { | |
ce91cd0b | 148 | int opt, ret = CMD_SUCCESS, command_ret = CMD_SUCCESS, success = 1; |
3087ef18 | 149 | static poptContext pc; |
5b915816 | 150 | const char *arg_session_name = NULL; |
3087ef18 DG |
151 | |
152 | pc = poptGetContext(NULL, argc, argv, long_options, 0); | |
153 | poptReadDefaultConfig(pc, 0); | |
154 | ||
155 | while ((opt = poptGetNextOpt(pc)) != -1) { | |
156 | switch (opt) { | |
157 | case OPT_HELP: | |
4ba92f18 | 158 | SHOW_HELP(); |
3087ef18 | 159 | goto end; |
679b4943 SM |
160 | case OPT_LIST_OPTIONS: |
161 | list_cmd_options(stdout, long_options); | |
679b4943 | 162 | goto end; |
3087ef18 | 163 | default: |
3087ef18 DG |
164 | ret = CMD_UNDEFINED; |
165 | goto end; | |
166 | } | |
167 | } | |
168 | ||
5b915816 MJ |
169 | arg_session_name = poptGetArg(pc); |
170 | if (arg_session_name == NULL) { | |
3087ef18 | 171 | ERR("Missing session name"); |
ca1c3607 | 172 | ret = CMD_ERROR; |
3087ef18 DG |
173 | goto end; |
174 | } | |
175 | ||
ce91cd0b JRJ |
176 | /* Mi check */ |
177 | if (lttng_opt_mi) { | |
178 | writer = mi_lttng_writer_create(fileno(stdout), lttng_opt_mi); | |
179 | if (!writer) { | |
180 | ret = -LTTNG_ERR_NOMEM; | |
181 | goto end; | |
182 | } | |
183 | ||
184 | /* Open command element */ | |
185 | ret = mi_lttng_writer_command_open(writer, | |
186 | mi_lttng_element_command_set_session); | |
187 | if (ret) { | |
188 | ret = CMD_ERROR; | |
189 | goto end; | |
190 | } | |
191 | ||
192 | /* Open output element */ | |
193 | ret = mi_lttng_writer_open_element(writer, | |
194 | mi_lttng_element_command_output); | |
195 | if (ret) { | |
196 | ret = CMD_ERROR; | |
197 | goto end; | |
198 | } | |
199 | } | |
200 | ||
5b915816 | 201 | command_ret = set_session(arg_session_name); |
ce91cd0b JRJ |
202 | if (command_ret) { |
203 | success = 0; | |
204 | } | |
205 | ||
206 | /* Mi closing */ | |
207 | if (lttng_opt_mi) { | |
208 | /* Close output element */ | |
209 | ret = mi_lttng_writer_close_element(writer); | |
210 | if (ret) { | |
211 | ret = CMD_ERROR; | |
212 | goto end; | |
213 | } | |
214 | ||
215 | /* Success ? */ | |
216 | ret = mi_lttng_writer_write_element_bool(writer, | |
217 | mi_lttng_element_command_success, success); | |
218 | if (ret) { | |
219 | ret = CMD_ERROR; | |
220 | goto end; | |
221 | } | |
222 | ||
223 | /* Command element close */ | |
224 | ret = mi_lttng_writer_command_close(writer); | |
225 | if (ret) { | |
226 | ret = CMD_ERROR; | |
227 | goto end; | |
228 | } | |
229 | } | |
3087ef18 DG |
230 | |
231 | end: | |
ce91cd0b JRJ |
232 | /* Mi clean-up */ |
233 | if (writer && mi_lttng_writer_destroy(writer)) { | |
234 | /* Preserve original error code */ | |
235 | ret = ret ? ret : LTTNG_ERR_MI_IO_FAIL; | |
236 | } | |
237 | ||
83f4233d | 238 | /* Overwrite ret if an error occurred during set_session() */ |
ce91cd0b JRJ |
239 | ret = command_ret ? command_ret : ret; |
240 | ||
ca1c3607 | 241 | poptFreeContext(pc); |
3087ef18 DG |
242 | return ret; |
243 | } |