Add lttng-error.h containing every API err. code
[lttng-tools.git] / src / bin / lttng / commands / destroy.c
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1/*
2 * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
3 *
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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.
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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 *
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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.
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16 */
17
18#define _GNU_SOURCE
19#include <popt.h>
20#include <stdio.h>
21#include <stdlib.h>
22#include <string.h>
23#include <sys/stat.h>
24#include <sys/types.h>
25#include <unistd.h>
26
c399183f 27#include "../command.h"
f3ed775e 28
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29#include <common/sessiond-comm/sessiond-comm.h>
30
fd076c09 31static char *opt_session_name;
b09ee5ba 32static int opt_destroy_all;
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33
34enum {
35 OPT_HELP = 1,
679b4943 36 OPT_LIST_OPTIONS,
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37};
38
39static struct poptOption long_options[] = {
40 /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
41 {"help", 'h', POPT_ARG_NONE, 0, OPT_HELP, 0, 0},
b09ee5ba 42 {"all", 'a', POPT_ARG_VAL, &opt_destroy_all, 1, 0, 0},
679b4943 43 {"list-options", 0, POPT_ARG_NONE, NULL, OPT_LIST_OPTIONS, NULL, NULL},
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44 {0, 0, 0, 0, 0, 0, 0}
45};
46
47/*
48 * usage
49 */
50static void usage(FILE *ofp)
51{
32a6298d 52 fprintf(ofp, "usage: lttng destroy [NAME] [OPTIONS]\n");
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53 fprintf(ofp, "\n");
54 fprintf(ofp, "Where NAME is an optional session name. If not specified, lttng will\n");
55 fprintf(ofp, "get it from the configuration directory (.lttng).\n");
56 fprintf(ofp, "\n");
32a6298d 57 fprintf(ofp, "Options:\n");
f3ed775e 58 fprintf(ofp, " -h, --help Show this help\n");
b09ee5ba 59 fprintf(ofp, " -a, --all Destroy all sessions\n");
27221701 60 fprintf(ofp, " --list-options Simple listing of options\n");
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61 fprintf(ofp, "\n");
62}
63
64/*
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FG
65 * destroy_session
66 *
67 * Unregister the provided session to the session daemon. On success, removes
68 * the default configuration.
f3ed775e 69 */
b09ee5ba 70static int destroy_session(const char *session_name)
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71{
72 int ret;
f3ed775e 73
843f5df9 74 ret = lttng_destroy_session(session_name);
f3ed775e 75 if (ret < 0) {
42224349 76 switch (-ret) {
f73fabfd 77 case LTTNG_ERR_SESS_NOT_FOUND:
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78 WARN("Session name %s not found", session_name);
79 break;
80 default:
81 break;
82 }
b09ee5ba 83 goto error;
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84 }
85
b09ee5ba
FG
86 MSG("Session %s destroyed", session_name);
87 config_destroy_default();
f3ed775e 88 ret = CMD_SUCCESS;
b09ee5ba
FG
89error:
90 return ret;
91}
f3ed775e 92
b09ee5ba
FG
93/*
94 * destroy_all_sessions
95 *
96 * Call destroy_sessions for each registered sessions
97 */
98static int destroy_all_sessions()
99{
100 int count, i, ret = CMD_SUCCESS;
101 struct lttng_session *sessions;
102
103 count = lttng_list_sessions(&sessions);
104 if (count == 0) {
105 MSG("No session found, nothing to do.");
106 }
107 for (i = 0; i < count; i++) {
108 ret = destroy_session(sessions[i].name);
109 if (ret < 0) {
110 goto error;
111 }
b73d0b29 112 }
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113error:
114 return ret;
115}
116
117/*
843f5df9 118 * The 'destroy <options>' first level command
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119 */
120int cmd_destroy(int argc, const char **argv)
121{
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122 int opt;
123 int ret = CMD_SUCCESS;
f3ed775e 124 static poptContext pc;
b09ee5ba 125 char *session_name = NULL;
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126
127 pc = poptGetContext(NULL, argc, argv, long_options, 0);
128 poptReadDefaultConfig(pc, 0);
129
130 while ((opt = poptGetNextOpt(pc)) != -1) {
131 switch (opt) {
132 case OPT_HELP:
ca1c3607 133 usage(stdout);
b09ee5ba 134 break;
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135 case OPT_LIST_OPTIONS:
136 list_cmd_options(stdout, long_options);
b09ee5ba 137 break;
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138 default:
139 usage(stderr);
140 ret = CMD_UNDEFINED;
b09ee5ba 141 break;
f3ed775e 142 }
b09ee5ba 143 goto end;
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144 }
145
fd076c09 146 /* Ignore session name in case all sessions are to be destroyed */
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FG
147 if (opt_destroy_all) {
148 ret = destroy_all_sessions();
149 goto end;
150 }
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151
152 opt_session_name = (char *) poptGetArg(pc);
153
154 if (opt_session_name == NULL) {
155 /* No session name specified, lookup default */
156 session_name = get_session_name();
157 if (session_name == NULL) {
158 ret = CMD_ERROR;
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159 goto end;
160 }
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161 } else {
162 session_name = opt_session_name;
b09ee5ba 163 }
fd076c09 164
b09ee5ba 165 ret = destroy_session(session_name);
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166
167end:
fd076c09 168 if (opt_session_name == NULL) {
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169 free(session_name);
170 }
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171
172 poptFreeContext(pc);
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173 return ret;
174}
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