b7931595879b607dca82186f36905f7f6335abd2
[lttng-tools.git] / src / bin / lttng / commands / destroy.c
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; only version 2
7 * of the License.
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 "../command.h"
29
30 static char *opt_session_name;
31
32 enum {
33 OPT_HELP = 1,
34 };
35
36 static struct poptOption long_options[] = {
37 /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
38 {"help", 'h', POPT_ARG_NONE, 0, OPT_HELP, 0, 0},
39 {0, 0, 0, 0, 0, 0, 0}
40 };
41
42 /*
43 * usage
44 */
45 static void usage(FILE *ofp)
46 {
47 fprintf(ofp, "usage: lttng destroy [options] [NAME]\n");
48 fprintf(ofp, "\n");
49 fprintf(ofp, "Where NAME is an optional session name. If not specified, lttng will\n");
50 fprintf(ofp, "get it from the configuration directory (.lttng).\n");
51 fprintf(ofp, "\n");
52 fprintf(ofp, " -h, --help Show this help\n");
53 fprintf(ofp, "\n");
54 }
55
56 /*
57 * Destroy a session removing the config directory and unregistering to the
58 * session daemon.
59 */
60 static int destroy_session()
61 {
62 int ret;
63 char *session_name, *path;
64
65 if (opt_session_name == NULL) {
66 session_name = get_session_name();
67 if (session_name == NULL) {
68 ret = CMD_ERROR;
69 goto error;
70 }
71 } else {
72 session_name = opt_session_name;
73 }
74
75 ret = lttng_destroy_session(session_name);
76 if (ret < 0) {
77 goto free_name;
78 }
79
80 path = config_get_default_path();
81 if (path == NULL) {
82 ret = CMD_FATAL;
83 goto free_name;
84 }
85
86 if (opt_session_name == NULL) {
87 config_destroy(path);
88 MSG("Session %s destroyed at %s", session_name, path);
89 } else {
90 MSG("Session %s destroyed", session_name);
91 }
92
93 ret = CMD_SUCCESS;
94
95 free_name:
96 if (opt_session_name == NULL) {
97 free(session_name);
98 }
99 error:
100 return ret;
101 }
102
103 /*
104 * The 'destroy <options>' first level command
105 */
106 int cmd_destroy(int argc, const char **argv)
107 {
108 int opt, ret = CMD_SUCCESS;
109 static poptContext pc;
110
111 pc = poptGetContext(NULL, argc, argv, long_options, 0);
112 poptReadDefaultConfig(pc, 0);
113
114 while ((opt = poptGetNextOpt(pc)) != -1) {
115 switch (opt) {
116 case OPT_HELP:
117 usage(stderr);
118 goto end;
119 default:
120 usage(stderr);
121 ret = CMD_UNDEFINED;
122 goto end;
123 }
124 }
125
126 opt_session_name = (char*) poptGetArg(pc);
127
128 ret = destroy_session();
129
130 end:
131 return ret;
132 }
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