Check kernel version for tests
[lttng-tools.git] / src / bin / lttng / commands / stop.c
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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,
34};
35
36static 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 */
45static void usage(FILE *ofp)
46{
47 fprintf(ofp, "usage: lttng stop [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/*
cd80958d 57 * Start tracing for all trace of the session.
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58 */
59static int stop_tracing(void)
60{
61 int ret = CMD_SUCCESS;
62 char *session_name;
63
64 if (opt_session_name == NULL) {
65 session_name = get_session_name();
66 if (session_name == NULL) {
67 ret = CMD_ERROR;
68 goto error;
69 }
70 } else {
71 session_name = opt_session_name;
72 }
73
6a4f824d 74 ret = lttng_stop_tracing(session_name);
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75 if (ret < 0) {
76 goto free_name;
77 }
78
79 MSG("Tracing stopped for session %s", session_name);
80
81free_name:
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82 if (opt_session_name == NULL) {
83 free(session_name);
84 }
cd80958d 85
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86error:
87 return ret;
88}
89
90/*
91 * cmd_stop
92 *
93 * The 'stop <options>' first level command
94 */
95int cmd_stop(int argc, const char **argv)
96{
97 int opt, ret;
98 static poptContext pc;
99
100 pc = poptGetContext(NULL, argc, argv, long_options, 0);
101 poptReadDefaultConfig(pc, 0);
102
103 while ((opt = poptGetNextOpt(pc)) != -1) {
104 switch (opt) {
105 case OPT_HELP:
106 usage(stderr);
107 ret = CMD_SUCCESS;
108 goto end;
109 default:
110 usage(stderr);
111 ret = CMD_UNDEFINED;
112 goto end;
113 }
114 }
115
116 opt_session_name = (char*) poptGetArg(pc);
117
118 ret = stop_tracing();
119
120end:
121 return ret;
122}
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