| 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 | |
| 36 | enum { |
| 37 | OPT_HELP = 1, |
| 38 | OPT_LIST_OPTIONS, |
| 39 | OPT_LIST_COMMANDS, |
| 40 | }; |
| 41 | |
| 42 | static struct poptOption long_options[] = { |
| 43 | /* { longName, shortName, argInfo, argPtr, value, descrip, argDesc, } */ |
| 44 | { "help", 'h', POPT_ARG_NONE, 0, OPT_HELP, 0, 0, }, |
| 45 | { "session", 's', POPT_ARG_STRING, &opt_session_name, 0, 0, 0}, |
| 46 | { "list-options", 0, POPT_ARG_NONE, NULL, OPT_LIST_OPTIONS, 0, 0, }, |
| 47 | { "list-commands", 0, POPT_ARG_NONE, NULL, OPT_LIST_COMMANDS}, |
| 48 | { 0, 0, 0, 0, 0, 0, 0, }, |
| 49 | }; |
| 50 | |
| 51 | static struct cmd_struct actions[] = { |
| 52 | { "regenerate", metadata_regenerate }, |
| 53 | { NULL, NULL } /* Array closure */ |
| 54 | }; |
| 55 | |
| 56 | /* |
| 57 | * usage |
| 58 | */ |
| 59 | static void usage(FILE *ofp) |
| 60 | { |
| 61 | fprintf(ofp, "usage: lttng metadata [OPTION] ACTION\n"); |
| 62 | fprintf(ofp, "\n"); |
| 63 | fprintf(ofp, "Actions:\n"); |
| 64 | fprintf(ofp, " regenerate\n"); |
| 65 | fprintf(ofp, " Regenerate and overwrite the metadata of the session.\n"); |
| 66 | fprintf(ofp, "Options:\n"); |
| 67 | fprintf(ofp, " -h, --help Show this help.\n"); |
| 68 | fprintf(ofp, " --list-options Simple listing of options.\n"); |
| 69 | fprintf(ofp, " -s, --session NAME Apply to session name.\n"); |
| 70 | fprintf(ofp, "\n"); |
| 71 | } |
| 72 | |
| 73 | /* |
| 74 | * Count and return the number of arguments in argv. |
| 75 | */ |
| 76 | static int count_arguments(const char **argv) |
| 77 | { |
| 78 | int i = 0; |
| 79 | |
| 80 | assert(argv); |
| 81 | |
| 82 | while (argv[i] != NULL) { |
| 83 | i++; |
| 84 | } |
| 85 | |
| 86 | return i; |
| 87 | } |
| 88 | |
| 89 | static int metadata_regenerate(int argc, const char **argv) |
| 90 | { |
| 91 | int ret; |
| 92 | |
| 93 | ret = lttng_metadata_regenerate(session_name); |
| 94 | if (ret == 0) { |
| 95 | MSG("Metadata successfully regenerated for session %s", session_name); |
| 96 | } |
| 97 | return ret; |
| 98 | } |
| 99 | |
| 100 | static int handle_command(const char **argv) |
| 101 | { |
| 102 | struct cmd_struct *cmd; |
| 103 | int ret = CMD_SUCCESS, i = 0, argc, command_ret = CMD_SUCCESS; |
| 104 | |
| 105 | if (argv == NULL) { |
| 106 | usage(stderr); |
| 107 | command_ret = CMD_ERROR; |
| 108 | goto end; |
| 109 | } |
| 110 | |
| 111 | argc = count_arguments(argv); |
| 112 | |
| 113 | cmd = &actions[i]; |
| 114 | while (cmd->func != NULL) { |
| 115 | /* Find command */ |
| 116 | if (strcmp(argv[0], cmd->name) == 0) { |
| 117 | command_ret = cmd->func(argc, argv); |
| 118 | goto end; |
| 119 | } |
| 120 | |
| 121 | cmd = &actions[i++]; |
| 122 | } |
| 123 | |
| 124 | ret = CMD_UNDEFINED; |
| 125 | |
| 126 | end: |
| 127 | /* Overwrite ret if an error occurred in cmd->func() */ |
| 128 | ret = command_ret ? command_ret : ret; |
| 129 | return ret; |
| 130 | } |
| 131 | |
| 132 | /* |
| 133 | * Metadata command handling. |
| 134 | */ |
| 135 | int cmd_metadata(int argc, const char **argv) |
| 136 | { |
| 137 | int opt, ret = CMD_SUCCESS, command_ret = CMD_SUCCESS; |
| 138 | static poptContext pc; |
| 139 | |
| 140 | if (argc < 1) { |
| 141 | usage(stderr); |
| 142 | ret = CMD_ERROR; |
| 143 | goto end; |
| 144 | } |
| 145 | |
| 146 | pc = poptGetContext(NULL, argc, argv, long_options, 0); |
| 147 | poptReadDefaultConfig(pc, 0); |
| 148 | |
| 149 | while ((opt = poptGetNextOpt(pc)) != -1) { |
| 150 | switch (opt) { |
| 151 | case OPT_HELP: |
| 152 | usage(stdout); |
| 153 | goto end; |
| 154 | case OPT_LIST_OPTIONS: |
| 155 | list_cmd_options(stdout, long_options); |
| 156 | goto end; |
| 157 | case OPT_LIST_COMMANDS: |
| 158 | list_commands(actions, stdout); |
| 159 | goto end; |
| 160 | default: |
| 161 | usage(stderr); |
| 162 | ret = CMD_UNDEFINED; |
| 163 | goto end; |
| 164 | } |
| 165 | } |
| 166 | |
| 167 | if (!opt_session_name) { |
| 168 | session_name = get_session_name(); |
| 169 | if (session_name == NULL) { |
| 170 | ret = CMD_ERROR; |
| 171 | goto end; |
| 172 | } |
| 173 | } else { |
| 174 | session_name = opt_session_name; |
| 175 | } |
| 176 | |
| 177 | command_ret = handle_command(poptGetArgs(pc)); |
| 178 | if (command_ret) { |
| 179 | switch (-command_ret) { |
| 180 | default: |
| 181 | ERR("%s", lttng_strerror(command_ret)); |
| 182 | break; |
| 183 | } |
| 184 | } |
| 185 | |
| 186 | end: |
| 187 | if (!opt_session_name) { |
| 188 | free(session_name); |
| 189 | } |
| 190 | |
| 191 | /* Overwrite ret if an error occurred during handle_command() */ |
| 192 | ret = command_ret ? command_ret : ret; |
| 193 | |
| 194 | poptFreeContext(pc); |
| 195 | return ret; |
| 196 | } |