| 1 | /* |
| 2 | * Copyright (C) 2015 Julien Desfossez <jdesfossez@efficios.com> |
| 3 | * |
| 4 | * SPDX-License-Identifier: GPL-2.0-only |
| 5 | * |
| 6 | */ |
| 7 | |
| 8 | #define _LGPL_SOURCE |
| 9 | #include "../command.hpp" |
| 10 | |
| 11 | #include <common/mi-lttng.hpp> |
| 12 | |
| 13 | #include <ctype.h> |
| 14 | #include <popt.h> |
| 15 | #include <stdio.h> |
| 16 | #include <stdlib.h> |
| 17 | #include <string.h> |
| 18 | #include <unistd.h> |
| 19 | |
| 20 | static char *opt_session_name; |
| 21 | static char *session_name = nullptr; |
| 22 | |
| 23 | static int regenerate_metadata(int argc, const char **argv); |
| 24 | static int regenerate_statedump(int argc, const char **argv); |
| 25 | |
| 26 | #ifdef LTTNG_EMBED_HELP |
| 27 | static const char help_msg[] = |
| 28 | #include <lttng-regenerate.1.h> |
| 29 | ; |
| 30 | #endif |
| 31 | |
| 32 | enum { |
| 33 | OPT_HELP = 1, |
| 34 | OPT_LIST_OPTIONS, |
| 35 | OPT_LIST_COMMANDS, |
| 36 | }; |
| 37 | |
| 38 | static struct mi_writer *writer; |
| 39 | |
| 40 | static struct poptOption long_options[] = { |
| 41 | /* { longName, shortName, argInfo, argPtr, value, descrip, argDesc, } */ |
| 42 | { |
| 43 | "help", |
| 44 | 'h', |
| 45 | POPT_ARG_NONE, |
| 46 | nullptr, |
| 47 | OPT_HELP, |
| 48 | nullptr, |
| 49 | nullptr, |
| 50 | }, |
| 51 | { "session", 's', POPT_ARG_STRING, &opt_session_name, 0, nullptr, nullptr }, |
| 52 | { |
| 53 | "list-options", |
| 54 | 0, |
| 55 | POPT_ARG_NONE, |
| 56 | nullptr, |
| 57 | OPT_LIST_OPTIONS, |
| 58 | nullptr, |
| 59 | nullptr, |
| 60 | }, |
| 61 | { "list-commands", 0, POPT_ARG_NONE, nullptr, OPT_LIST_COMMANDS, nullptr, nullptr }, |
| 62 | { |
| 63 | nullptr, |
| 64 | 0, |
| 65 | 0, |
| 66 | nullptr, |
| 67 | 0, |
| 68 | nullptr, |
| 69 | nullptr, |
| 70 | }, |
| 71 | }; |
| 72 | |
| 73 | static struct cmd_struct actions[] = { |
| 74 | { "metadata", regenerate_metadata }, |
| 75 | { "statedump", regenerate_statedump }, |
| 76 | { nullptr, nullptr } /* Array closure */ |
| 77 | }; |
| 78 | |
| 79 | /* |
| 80 | * Count and return the number of arguments in argv. |
| 81 | */ |
| 82 | static int count_arguments(const char **argv) |
| 83 | { |
| 84 | int i = 0; |
| 85 | |
| 86 | LTTNG_ASSERT(argv); |
| 87 | |
| 88 | while (argv[i] != nullptr) { |
| 89 | i++; |
| 90 | } |
| 91 | |
| 92 | return i; |
| 93 | } |
| 94 | |
| 95 | static int regenerate_metadata(int argc, const char **argv __attribute__((unused))) |
| 96 | { |
| 97 | int ret; |
| 98 | |
| 99 | if (argc > 1) { |
| 100 | ret = CMD_UNDEFINED; |
| 101 | goto end; |
| 102 | } |
| 103 | ret = lttng_regenerate_metadata(session_name); |
| 104 | if (ret == 0) { |
| 105 | MSG("Metadata successfully regenerated for session %s", session_name); |
| 106 | } else { |
| 107 | ERR("%s", lttng_strerror(ret)); |
| 108 | } |
| 109 | |
| 110 | end: |
| 111 | return ret; |
| 112 | } |
| 113 | |
| 114 | static int regenerate_statedump(int argc, const char **argv __attribute__((unused))) |
| 115 | { |
| 116 | int ret; |
| 117 | |
| 118 | if (argc > 1) { |
| 119 | ret = -LTTNG_ERR_INVALID; |
| 120 | goto end; |
| 121 | } |
| 122 | ret = lttng_regenerate_statedump(session_name); |
| 123 | if (ret == 0) { |
| 124 | MSG("State dump successfully regenerated for session %s", session_name); |
| 125 | } |
| 126 | |
| 127 | end: |
| 128 | return ret; |
| 129 | } |
| 130 | |
| 131 | static int handle_command(const char **argv) |
| 132 | { |
| 133 | struct cmd_struct *cmd; |
| 134 | int ret = CMD_SUCCESS, i = 0, argc, command_ret = CMD_SUCCESS; |
| 135 | |
| 136 | if (argv == nullptr) { |
| 137 | ERR("No object specified for regenerate command."); |
| 138 | command_ret = CMD_ERROR; |
| 139 | goto end; |
| 140 | } |
| 141 | |
| 142 | argc = count_arguments(argv); |
| 143 | LTTNG_ASSERT(argc >= 1); |
| 144 | |
| 145 | cmd = &actions[i]; |
| 146 | while (cmd->func != nullptr) { |
| 147 | /* Find command */ |
| 148 | if (strcmp(argv[0], cmd->name) == 0) { |
| 149 | if (lttng_opt_mi) { |
| 150 | /* Action element */ |
| 151 | ret = mi_lttng_writer_open_element( |
| 152 | writer, mi_lttng_element_command_regenerate_action); |
| 153 | if (ret) { |
| 154 | ret = CMD_ERROR; |
| 155 | goto end; |
| 156 | } |
| 157 | |
| 158 | /* Name of the action */ |
| 159 | ret = mi_lttng_writer_write_element_string( |
| 160 | writer, config_element_name, argv[0]); |
| 161 | if (ret) { |
| 162 | ret = CMD_ERROR; |
| 163 | goto end; |
| 164 | } |
| 165 | } |
| 166 | command_ret = cmd->func(argc, argv); |
| 167 | if (lttng_opt_mi) { |
| 168 | /* Close output and action element */ |
| 169 | ret = mi_lttng_writer_close_element(writer); |
| 170 | if (ret) { |
| 171 | ret = CMD_ERROR; |
| 172 | goto end; |
| 173 | } |
| 174 | } |
| 175 | goto end; |
| 176 | } |
| 177 | |
| 178 | cmd = &actions[i++]; |
| 179 | } |
| 180 | |
| 181 | ret = CMD_UNDEFINED; |
| 182 | |
| 183 | end: |
| 184 | /* Overwrite ret if an error occurred in cmd->func() */ |
| 185 | ret = command_ret ? command_ret : ret; |
| 186 | return ret; |
| 187 | } |
| 188 | |
| 189 | /* |
| 190 | * regenerate command handling. |
| 191 | */ |
| 192 | int cmd_regenerate(int argc, const char **argv) |
| 193 | { |
| 194 | int opt, ret = CMD_SUCCESS, command_ret = CMD_SUCCESS, success = 1; |
| 195 | static poptContext pc; |
| 196 | |
| 197 | if (argc < 1) { |
| 198 | SHOW_HELP(); |
| 199 | ret = CMD_ERROR; |
| 200 | goto end; |
| 201 | } |
| 202 | |
| 203 | pc = poptGetContext(nullptr, argc, argv, long_options, 0); |
| 204 | poptReadDefaultConfig(pc, 0); |
| 205 | |
| 206 | if (lttng_opt_mi) { |
| 207 | writer = mi_lttng_writer_create(fileno(stdout), lttng_opt_mi); |
| 208 | if (!writer) { |
| 209 | ret = -LTTNG_ERR_NOMEM; |
| 210 | goto end; |
| 211 | } |
| 212 | /* Open command element */ |
| 213 | ret = mi_lttng_writer_command_open(writer, mi_lttng_element_command_regenerate); |
| 214 | if (ret) { |
| 215 | ret = CMD_ERROR; |
| 216 | goto end; |
| 217 | } |
| 218 | |
| 219 | /* Open output element */ |
| 220 | ret = mi_lttng_writer_open_element(writer, mi_lttng_element_command_output); |
| 221 | if (ret) { |
| 222 | ret = CMD_ERROR; |
| 223 | goto end; |
| 224 | } |
| 225 | } |
| 226 | |
| 227 | while ((opt = poptGetNextOpt(pc)) != -1) { |
| 228 | switch (opt) { |
| 229 | case OPT_HELP: |
| 230 | SHOW_HELP(); |
| 231 | goto end; |
| 232 | case OPT_LIST_OPTIONS: |
| 233 | list_cmd_options(stdout, long_options); |
| 234 | goto end; |
| 235 | case OPT_LIST_COMMANDS: |
| 236 | list_commands(actions, stdout); |
| 237 | goto end; |
| 238 | default: |
| 239 | SHOW_HELP(); |
| 240 | ret = CMD_UNDEFINED; |
| 241 | goto end; |
| 242 | } |
| 243 | } |
| 244 | |
| 245 | if (!opt_session_name) { |
| 246 | session_name = get_session_name(); |
| 247 | if (session_name == nullptr) { |
| 248 | ret = CMD_ERROR; |
| 249 | goto end; |
| 250 | } |
| 251 | } else { |
| 252 | session_name = opt_session_name; |
| 253 | } |
| 254 | |
| 255 | command_ret = handle_command(poptGetArgs(pc)); |
| 256 | if (command_ret) { |
| 257 | success = 0; |
| 258 | } |
| 259 | |
| 260 | if (lttng_opt_mi) { |
| 261 | /* Close output element */ |
| 262 | ret = mi_lttng_writer_close_element(writer); |
| 263 | if (ret) { |
| 264 | ret = CMD_ERROR; |
| 265 | goto end; |
| 266 | } |
| 267 | |
| 268 | /* Success ? */ |
| 269 | ret = mi_lttng_writer_write_element_bool( |
| 270 | writer, mi_lttng_element_command_success, success); |
| 271 | if (ret) { |
| 272 | ret = CMD_ERROR; |
| 273 | goto end; |
| 274 | } |
| 275 | |
| 276 | /* Command element close */ |
| 277 | ret = mi_lttng_writer_command_close(writer); |
| 278 | if (ret) { |
| 279 | ret = CMD_ERROR; |
| 280 | goto end; |
| 281 | } |
| 282 | } |
| 283 | |
| 284 | end: |
| 285 | /* Mi clean-up */ |
| 286 | if (writer && mi_lttng_writer_destroy(writer)) { |
| 287 | /* Preserve original error code */ |
| 288 | ret = ret ? ret : -LTTNG_ERR_MI_IO_FAIL; |
| 289 | } |
| 290 | |
| 291 | if (!opt_session_name) { |
| 292 | free(session_name); |
| 293 | } |
| 294 | |
| 295 | /* Overwrite ret if an error occurred during handle_command() */ |
| 296 | ret = command_ret ? command_ret : ret; |
| 297 | |
| 298 | poptFreeContext(pc); |
| 299 | return ret; |
| 300 | } |