Improve delete of configuration
[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
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31static char *opt_session_name;
32
33enum {
34 OPT_HELP = 1,
679b4943 35 OPT_LIST_OPTIONS,
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36};
37
38static struct poptOption long_options[] = {
39 /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
40 {"help", 'h', POPT_ARG_NONE, 0, OPT_HELP, 0, 0},
679b4943 41 {"list-options", 0, POPT_ARG_NONE, NULL, OPT_LIST_OPTIONS, NULL, NULL},
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42 {0, 0, 0, 0, 0, 0, 0}
43};
44
45/*
46 * usage
47 */
48static void usage(FILE *ofp)
49{
50 fprintf(ofp, "usage: lttng destroy [options] [NAME]\n");
51 fprintf(ofp, "\n");
52 fprintf(ofp, "Where NAME is an optional session name. If not specified, lttng will\n");
53 fprintf(ofp, "get it from the configuration directory (.lttng).\n");
54 fprintf(ofp, "\n");
55 fprintf(ofp, " -h, --help Show this help\n");
27221701 56 fprintf(ofp, " --list-options Simple listing of options\n");
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57 fprintf(ofp, "\n");
58}
59
60/*
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61 * Destroy a session removing the config directory and unregistering to the
62 * session daemon.
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63 */
64static int destroy_session()
65{
66 int ret;
67 char *session_name, *path;
68
69 if (opt_session_name == NULL) {
70 session_name = get_session_name();
71 if (session_name == NULL) {
72 ret = CMD_ERROR;
73 goto error;
74 }
75 } else {
76 session_name = opt_session_name;
77 }
78
843f5df9 79 ret = lttng_destroy_session(session_name);
f3ed775e 80 if (ret < 0) {
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81 switch (-ret) {
82 case LTTCOMM_SESS_NOT_FOUND:
83 WARN("Session name %s not found", session_name);
84 break;
85 default:
86 break;
87 }
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88 goto free_name;
89 }
90
58a97671 91 path = config_get_default_path();
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92 if (path == NULL) {
93 ret = CMD_FATAL;
94 goto free_name;
95 }
96
97 if (opt_session_name == NULL) {
98 config_destroy(path);
99 MSG("Session %s destroyed at %s", session_name, path);
100 } else {
101 MSG("Session %s destroyed", session_name);
102 }
103
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104 ret = CMD_SUCCESS;
105
106free_name:
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107 if (opt_session_name == NULL) {
108 free(session_name);
109 }
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110error:
111 return ret;
112}
113
114/*
843f5df9 115 * The 'destroy <options>' first level command
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116 */
117int cmd_destroy(int argc, const char **argv)
118{
119 int opt, ret = CMD_SUCCESS;
120 static poptContext pc;
121
122 pc = poptGetContext(NULL, argc, argv, long_options, 0);
123 poptReadDefaultConfig(pc, 0);
124
125 while ((opt = poptGetNextOpt(pc)) != -1) {
126 switch (opt) {
127 case OPT_HELP:
ca1c3607 128 usage(stdout);
f3ed775e 129 goto end;
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130 case OPT_LIST_OPTIONS:
131 list_cmd_options(stdout, long_options);
679b4943 132 goto end;
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133 default:
134 usage(stderr);
135 ret = CMD_UNDEFINED;
136 goto end;
137 }
138 }
139
140 opt_session_name = (char*) poptGetArg(pc);
141
142 ret = destroy_session();
143
144end:
ca1c3607 145 poptFreeContext(pc);
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146 return ret;
147}
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