| 1 | /* |
| 2 | * Copyright (C) 2014 - Jérémie Galarneau <jeremie.galarneau@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 <inttypes.h> |
| 20 | #include <popt.h> |
| 21 | #include <stdio.h> |
| 22 | #include <stdlib.h> |
| 23 | #include <string.h> |
| 24 | #include <assert.h> |
| 25 | |
| 26 | #include <common/mi-lttng.h> |
| 27 | #include <common/config/session-config.h> |
| 28 | #include <lttng/load.h> |
| 29 | |
| 30 | #include "../command.h" |
| 31 | |
| 32 | static char *opt_input_path; |
| 33 | static char *opt_override_url; |
| 34 | static char *opt_override_session_name; |
| 35 | static int opt_force; |
| 36 | static int opt_load_all; |
| 37 | |
| 38 | static const char *session_name; |
| 39 | |
| 40 | #ifdef LTTNG_EMBED_HELP |
| 41 | static const char help_msg[] = |
| 42 | #include <lttng-load.1.h> |
| 43 | ; |
| 44 | #endif |
| 45 | |
| 46 | enum { |
| 47 | OPT_HELP = 1, |
| 48 | OPT_ALL, |
| 49 | OPT_FORCE, |
| 50 | OPT_LIST_OPTIONS, |
| 51 | }; |
| 52 | |
| 53 | static struct mi_writer *writer; |
| 54 | |
| 55 | static struct poptOption load_opts[] = { |
| 56 | /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */ |
| 57 | {"help", 'h', POPT_ARG_NONE, 0, OPT_HELP, 0, 0}, |
| 58 | {"all", 'a', POPT_ARG_NONE, 0, OPT_ALL, 0, 0}, |
| 59 | {"input-path", 'i', POPT_ARG_STRING, &opt_input_path, 0, 0, 0}, |
| 60 | {"force", 'f', POPT_ARG_NONE, 0, OPT_FORCE, 0, 0}, |
| 61 | {"override-url", 0, POPT_ARG_STRING, &opt_override_url, 0, 0, 0}, |
| 62 | {"override-name", 0, POPT_ARG_STRING, &opt_override_session_name, 0, 0, 0}, |
| 63 | {"list-options", 0, POPT_ARG_NONE, NULL, OPT_LIST_OPTIONS, NULL, NULL}, |
| 64 | {0, 0, 0, 0, 0, 0, 0} |
| 65 | }; |
| 66 | |
| 67 | static int mi_partial_session(const char *session_name) |
| 68 | { |
| 69 | int ret; |
| 70 | assert(writer); |
| 71 | assert(session_name); |
| 72 | |
| 73 | /* Open session element */ |
| 74 | ret = mi_lttng_writer_open_element(writer, config_element_session); |
| 75 | if (ret) { |
| 76 | goto end; |
| 77 | } |
| 78 | |
| 79 | ret = mi_lttng_writer_write_element_string(writer, config_element_name, |
| 80 | session_name); |
| 81 | if (ret) { |
| 82 | goto end; |
| 83 | } |
| 84 | |
| 85 | /* Closing session element */ |
| 86 | ret = mi_lttng_writer_close_element(writer); |
| 87 | end: |
| 88 | return ret; |
| 89 | } |
| 90 | |
| 91 | /* |
| 92 | * Mi print of load command |
| 93 | */ |
| 94 | static int mi_load_print(const char *session_name) |
| 95 | { |
| 96 | int ret; |
| 97 | assert(writer); |
| 98 | |
| 99 | if (opt_load_all) { |
| 100 | /* We use a wildcard to represent all sessions */ |
| 101 | session_name = "*"; |
| 102 | } |
| 103 | |
| 104 | /* Print load element */ |
| 105 | ret = mi_lttng_writer_open_element(writer, mi_lttng_element_load); |
| 106 | if (ret) { |
| 107 | goto end; |
| 108 | } |
| 109 | |
| 110 | /* Print session element */ |
| 111 | ret = mi_partial_session(session_name); |
| 112 | if (ret) { |
| 113 | goto end; |
| 114 | } |
| 115 | |
| 116 | /* Path element */ |
| 117 | if (opt_input_path) { |
| 118 | ret = mi_lttng_writer_write_element_string(writer, config_element_path, |
| 119 | opt_input_path); |
| 120 | if (ret) { |
| 121 | goto end; |
| 122 | } |
| 123 | } |
| 124 | |
| 125 | /* Print override elements */ |
| 126 | ret = mi_lttng_writer_open_element(writer, mi_lttng_element_load_overrides); |
| 127 | if (ret) { |
| 128 | goto end; |
| 129 | } |
| 130 | |
| 131 | /* Session name override element */ |
| 132 | if (opt_override_session_name) { |
| 133 | ret = mi_lttng_writer_write_element_string(writer, |
| 134 | config_element_name, opt_override_session_name); |
| 135 | if (ret) { |
| 136 | goto end; |
| 137 | } |
| 138 | } |
| 139 | |
| 140 | /* Session url override element */ |
| 141 | if (opt_override_url) { |
| 142 | ret = mi_lttng_writer_write_element_string(writer, |
| 143 | mi_lttng_element_load_override_url, |
| 144 | opt_override_url); |
| 145 | if (ret) { |
| 146 | goto end; |
| 147 | } |
| 148 | } |
| 149 | |
| 150 | /* Close override and load element */ |
| 151 | ret = mi_lttng_close_multi_element(writer, 2); |
| 152 | end: |
| 153 | return ret; |
| 154 | } |
| 155 | |
| 156 | /* |
| 157 | * The 'load <options>' first level command |
| 158 | */ |
| 159 | int cmd_load(int argc, const char **argv) |
| 160 | { |
| 161 | int ret, success; |
| 162 | int opt; |
| 163 | poptContext pc; |
| 164 | struct lttng_load_session_attr *session_attr = NULL; |
| 165 | char *input_path = NULL; |
| 166 | |
| 167 | pc = poptGetContext(NULL, argc, argv, load_opts, 0); |
| 168 | poptReadDefaultConfig(pc, 0); |
| 169 | |
| 170 | while ((opt = poptGetNextOpt(pc)) != -1) { |
| 171 | switch (opt) { |
| 172 | case OPT_HELP: |
| 173 | SHOW_HELP(); |
| 174 | ret = CMD_SUCCESS; |
| 175 | goto end; |
| 176 | case OPT_ALL: |
| 177 | opt_load_all = 1; |
| 178 | break; |
| 179 | case OPT_LIST_OPTIONS: |
| 180 | list_cmd_options(stdout, load_opts); |
| 181 | ret = CMD_SUCCESS; |
| 182 | goto end; |
| 183 | case OPT_FORCE: |
| 184 | opt_force = 1; |
| 185 | break; |
| 186 | default: |
| 187 | ret = CMD_UNDEFINED; |
| 188 | goto end; |
| 189 | } |
| 190 | } |
| 191 | |
| 192 | ret = lttng_session_daemon_alive(); |
| 193 | if (!ret) { |
| 194 | ERR("No session daemon is available"); |
| 195 | ret = CMD_ERROR; |
| 196 | goto end; |
| 197 | } |
| 198 | |
| 199 | if (!opt_load_all) { |
| 200 | session_name = poptGetArg(pc); |
| 201 | if (session_name) { |
| 202 | DBG2("Loading session name: %s", session_name); |
| 203 | } else { |
| 204 | /* Default to load_all */ |
| 205 | opt_load_all = 1; |
| 206 | } |
| 207 | } |
| 208 | |
| 209 | /* Mi check */ |
| 210 | if (lttng_opt_mi) { |
| 211 | writer = mi_lttng_writer_create(fileno(stdout), lttng_opt_mi); |
| 212 | if (!writer) { |
| 213 | ret = CMD_ERROR; |
| 214 | goto end; |
| 215 | } |
| 216 | |
| 217 | /* Open command element */ |
| 218 | ret = mi_lttng_writer_command_open(writer, |
| 219 | mi_lttng_element_command_load); |
| 220 | if (ret) { |
| 221 | ret = CMD_ERROR; |
| 222 | goto end; |
| 223 | } |
| 224 | |
| 225 | /* Open output element */ |
| 226 | ret = mi_lttng_writer_open_element(writer, |
| 227 | mi_lttng_element_command_output); |
| 228 | if (ret) { |
| 229 | ret = CMD_ERROR; |
| 230 | goto end; |
| 231 | } |
| 232 | } |
| 233 | |
| 234 | /* Prepare load attributes */ |
| 235 | session_attr = lttng_load_session_attr_create(); |
| 236 | if (!session_attr) { |
| 237 | ERR("Failed to create load session attributes"); |
| 238 | ret = CMD_ERROR; |
| 239 | goto end; |
| 240 | } |
| 241 | |
| 242 | /* |
| 243 | * Set the input url |
| 244 | * lttng_load_session_attr_set_input_url only suppports absolute path. |
| 245 | * Use realpath to resolve any relative path. |
| 246 | * */ |
| 247 | if (opt_input_path) { |
| 248 | input_path = realpath(opt_input_path, NULL); |
| 249 | if (!input_path) { |
| 250 | PERROR("Invalid input path"); |
| 251 | ret = CMD_ERROR; |
| 252 | goto end; |
| 253 | } |
| 254 | } else { |
| 255 | input_path = NULL; |
| 256 | } |
| 257 | |
| 258 | ret = lttng_load_session_attr_set_input_url(session_attr, |
| 259 | input_path); |
| 260 | if (ret) { |
| 261 | ERR("Invalid input path"); |
| 262 | ret = CMD_ERROR; |
| 263 | goto end; |
| 264 | } |
| 265 | |
| 266 | /* Set the session name. NULL means all sessions should be loaded */ |
| 267 | ret = lttng_load_session_attr_set_session_name(session_attr, |
| 268 | session_name); |
| 269 | if (ret) { |
| 270 | ERR("Invalid session name"); |
| 271 | ret = CMD_ERROR; |
| 272 | goto end; |
| 273 | } |
| 274 | |
| 275 | /* Set the overwrite attribute */ |
| 276 | ret = lttng_load_session_attr_set_overwrite(session_attr, opt_force); |
| 277 | if (ret) { |
| 278 | ERR("Force argument could not be applied"); |
| 279 | ret = CMD_ERROR; |
| 280 | goto end; |
| 281 | } |
| 282 | |
| 283 | /* Set the overrides attributes if any */ |
| 284 | if (opt_override_url) { |
| 285 | ret = lttng_load_session_attr_set_override_url(session_attr, |
| 286 | opt_override_url); |
| 287 | if (ret) { |
| 288 | ERR("Url override is invalid"); |
| 289 | goto end; |
| 290 | } |
| 291 | } |
| 292 | |
| 293 | if (opt_override_session_name) { |
| 294 | if (opt_load_all) { |
| 295 | ERR("Options --all and --override-name cannot be used simultaneously"); |
| 296 | ret = CMD_ERROR; |
| 297 | goto end; |
| 298 | } |
| 299 | ret = lttng_load_session_attr_set_override_session_name(session_attr, |
| 300 | opt_override_session_name); |
| 301 | if (ret) { |
| 302 | ERR("Failed to set session name override"); |
| 303 | ret = CMD_ERROR; |
| 304 | goto end; |
| 305 | } |
| 306 | } |
| 307 | |
| 308 | ret = lttng_load_session(session_attr); |
| 309 | if (ret) { |
| 310 | ERR("%s", lttng_strerror(ret)); |
| 311 | success = 0; |
| 312 | ret = CMD_ERROR; |
| 313 | } else { |
| 314 | if (opt_load_all) { |
| 315 | MSG("All sessions have been loaded successfully"); |
| 316 | } else if (session_name) { |
| 317 | ret = config_init((char *) session_name); |
| 318 | if (ret < 0) { |
| 319 | WARN("Could not set %s as the default session", |
| 320 | session_name); |
| 321 | } |
| 322 | MSG("Session %s has been loaded successfully", session_name); |
| 323 | } else { |
| 324 | MSG("Session has been loaded successfully"); |
| 325 | } |
| 326 | |
| 327 | if (opt_override_session_name) { |
| 328 | MSG("Session name overridden with %s", |
| 329 | opt_override_session_name); |
| 330 | } |
| 331 | |
| 332 | if (opt_override_url) { |
| 333 | MSG("Session output url overridden with %s", opt_override_url); |
| 334 | } |
| 335 | success = 1; |
| 336 | ret = CMD_SUCCESS; |
| 337 | } |
| 338 | |
| 339 | /* Mi Printing and closing */ |
| 340 | if (lttng_opt_mi) { |
| 341 | /* Mi print */ |
| 342 | ret = mi_load_print(session_name); |
| 343 | if (ret) { |
| 344 | ret = CMD_ERROR; |
| 345 | goto end; |
| 346 | } |
| 347 | |
| 348 | /* Close output element */ |
| 349 | ret = mi_lttng_writer_close_element(writer); |
| 350 | if (ret) { |
| 351 | ret = CMD_ERROR; |
| 352 | goto end; |
| 353 | } |
| 354 | |
| 355 | /* Success ? */ |
| 356 | ret = mi_lttng_writer_write_element_bool(writer, |
| 357 | mi_lttng_element_command_success, success); |
| 358 | if (ret) { |
| 359 | ret = CMD_ERROR; |
| 360 | goto end; |
| 361 | } |
| 362 | |
| 363 | /* Command element close */ |
| 364 | ret = mi_lttng_writer_command_close(writer); |
| 365 | if (ret) { |
| 366 | ret = CMD_ERROR; |
| 367 | goto end; |
| 368 | } |
| 369 | } |
| 370 | end: |
| 371 | if (writer && mi_lttng_writer_destroy(writer)) { |
| 372 | ERR("Failed to destroy mi lttng writer"); |
| 373 | } |
| 374 | |
| 375 | lttng_load_session_attr_destroy(session_attr); |
| 376 | free(input_path); |
| 377 | poptFreeContext(pc); |
| 378 | return ret; |
| 379 | } |