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