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[lttng-tools.git] / lttng / commands / destroy.c
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DG
1/*
2 * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; either version 2
7 * of the License, or (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
17 */
18
19#define _GNU_SOURCE
20#include <popt.h>
21#include <stdio.h>
22#include <stdlib.h>
23#include <string.h>
24#include <sys/stat.h>
25#include <sys/types.h>
26#include <unistd.h>
27
28#include "cmd.h"
29#include "config.h"
30#include "utils.h"
31
32static char *opt_session_name;
33
34enum {
35 OPT_HELP = 1,
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},
41 {0, 0, 0, 0, 0, 0, 0}
42};
43
44/*
45 * usage
46 */
47static void usage(FILE *ofp)
48{
49 fprintf(ofp, "usage: lttng destroy [options] [NAME]\n");
50 fprintf(ofp, "\n");
51 fprintf(ofp, "Where NAME is an optional session name. If not specified, lttng will\n");
52 fprintf(ofp, "get it from the configuration directory (.lttng).\n");
53 fprintf(ofp, "\n");
54 fprintf(ofp, " -h, --help Show this help\n");
55 fprintf(ofp, "\n");
56}
57
58/*
59 * destroy_session
60 *
61 * Destroy a session removing the config directory and unregistering to the
62 * session daemon.
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
79 ret = lttng_destroy_session(session_name);
80 if (ret < 0) {
81 goto free_name;
82 }
83
84 path = get_config_file_path();
85 if (path == NULL) {
86 ret = CMD_FATAL;
87 goto free_name;
88 }
89
90 if (opt_session_name == NULL) {
91 config_destroy(path);
92 MSG("Session %s destroyed at %s", session_name, path);
93 } else {
94 MSG("Session %s destroyed", session_name);
95 }
96
97 free(path);
98 ret = CMD_SUCCESS;
99
100free_name:
101 free(session_name);
102error:
103 return ret;
104}
105
106/*
107 * cmd_destroy
108 *
109 * The 'destroy <options>' first level command
110 */
111int cmd_destroy(int argc, const char **argv)
112{
113 int opt, ret = CMD_SUCCESS;
114 static poptContext pc;
115
116 pc = poptGetContext(NULL, argc, argv, long_options, 0);
117 poptReadDefaultConfig(pc, 0);
118
119 while ((opt = poptGetNextOpt(pc)) != -1) {
120 switch (opt) {
121 case OPT_HELP:
122 usage(stderr);
123 goto end;
124 default:
125 usage(stderr);
126 ret = CMD_UNDEFINED;
127 goto end;
128 }
129 }
130
131 opt_session_name = (char*) poptGetArg(pc);
132
133 ret = destroy_session();
134
135end:
136 return ret;
137}
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