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[lttng-tools.git] / src / bin / lttng / commands / stop.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 "../cmd.h"
29 #include "../conf.h"
30 #include "../utils.h"
31
32 static char *opt_session_name;
33
34 enum {
35 OPT_HELP = 1,
36 };
37
38 static 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 */
47 static void usage(FILE *ofp)
48 {
49 fprintf(ofp, "usage: lttng stop [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 * Start tracing for all trace of the session.
60 */
61 static int stop_tracing(void)
62 {
63 int ret = CMD_SUCCESS;
64 char *session_name;
65
66 if (opt_session_name == NULL) {
67 session_name = get_session_name();
68 if (session_name == NULL) {
69 ret = CMD_ERROR;
70 goto error;
71 }
72 } else {
73 session_name = opt_session_name;
74 }
75
76 ret = lttng_stop_tracing(session_name);
77 if (ret < 0) {
78 goto free_name;
79 }
80
81 MSG("Tracing stopped for session %s", session_name);
82
83 free_name:
84 if (opt_session_name == NULL) {
85 free(session_name);
86 }
87
88 error:
89 return ret;
90 }
91
92 /*
93 * cmd_stop
94 *
95 * The 'stop <options>' first level command
96 */
97 int cmd_stop(int argc, const char **argv)
98 {
99 int opt, ret;
100 static poptContext pc;
101
102 pc = poptGetContext(NULL, argc, argv, long_options, 0);
103 poptReadDefaultConfig(pc, 0);
104
105 while ((opt = poptGetNextOpt(pc)) != -1) {
106 switch (opt) {
107 case OPT_HELP:
108 usage(stderr);
109 ret = CMD_SUCCESS;
110 goto end;
111 default:
112 usage(stderr);
113 ret = CMD_UNDEFINED;
114 goto end;
115 }
116 }
117
118 opt_session_name = (char*) poptGetArg(pc);
119
120 ret = stop_tracing();
121
122 end:
123 return ret;
124 }
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