Add a '--list-options' option to each command.
[lttng-tools.git] / src / bin / lttng / commands / destroy.c
CommitLineData
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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
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6 * as published by the Free Software Foundation; only version 2
7 * of the License.
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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
c399183f 28#include "../command.h"
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29
30static char *opt_session_name;
31
32enum {
33 OPT_HELP = 1,
679b4943 34 OPT_LIST_OPTIONS,
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35};
36
37static struct poptOption long_options[] = {
38 /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
39 {"help", 'h', POPT_ARG_NONE, 0, OPT_HELP, 0, 0},
679b4943 40 {"list-options", 0, POPT_ARG_NONE, NULL, OPT_LIST_OPTIONS, NULL, NULL},
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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");
679b4943 55 fprintf(ofp, " --list-options Simple listing of options\n");
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56 fprintf(ofp, "\n");
57}
58
59/*
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60 * Destroy a session removing the config directory and unregistering to the
61 * session daemon.
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62 */
63static int destroy_session()
64{
65 int ret;
66 char *session_name, *path;
67
68 if (opt_session_name == NULL) {
69 session_name = get_session_name();
70 if (session_name == NULL) {
71 ret = CMD_ERROR;
72 goto error;
73 }
74 } else {
75 session_name = opt_session_name;
76 }
77
843f5df9 78 ret = lttng_destroy_session(session_name);
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79 if (ret < 0) {
80 goto free_name;
81 }
82
58a97671 83 path = config_get_default_path();
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84 if (path == NULL) {
85 ret = CMD_FATAL;
86 goto free_name;
87 }
88
89 if (opt_session_name == NULL) {
90 config_destroy(path);
91 MSG("Session %s destroyed at %s", session_name, path);
92 } else {
93 MSG("Session %s destroyed", session_name);
94 }
95
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96 ret = CMD_SUCCESS;
97
98free_name:
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99 if (opt_session_name == NULL) {
100 free(session_name);
101 }
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102error:
103 return ret;
104}
105
106/*
843f5df9 107 * The 'destroy <options>' first level command
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108 */
109int cmd_destroy(int argc, const char **argv)
110{
111 int opt, ret = CMD_SUCCESS;
112 static poptContext pc;
113
114 pc = poptGetContext(NULL, argc, argv, long_options, 0);
115 poptReadDefaultConfig(pc, 0);
116
117 while ((opt = poptGetNextOpt(pc)) != -1) {
118 switch (opt) {
119 case OPT_HELP:
120 usage(stderr);
121 goto end;
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122 case OPT_LIST_OPTIONS:
123 list_cmd_options(stdout, long_options);
124 ret = CMD_SUCCESS;
125 goto end;
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126 default:
127 usage(stderr);
128 ret = CMD_UNDEFINED;
129 goto end;
130 }
131 }
132
133 opt_session_name = (char*) poptGetArg(pc);
134
135 ret = destroy_session();
136
137end:
138 return ret;
139}
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