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93ec662e JD |
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 | } |