Relayd data available command support
[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 *
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4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License, version 2 only,
6 * as published by the Free Software Foundation.
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7 *
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
12 *
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13 * You should have received a copy of the GNU General Public License along
14 * with this program; if not, write to the Free Software Foundation, Inc.,
15 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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16 */
17
18#define _GNU_SOURCE
19#include <popt.h>
20#include <stdio.h>
21#include <stdlib.h>
22#include <string.h>
23#include <sys/stat.h>
24#include <sys/types.h>
25#include <unistd.h>
26
c399183f 27#include "../command.h"
f3ed775e 28
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29#include <common/sessiond-comm/sessiond-comm.h>
30
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31static char *opt_session_name;
32
33enum {
34 OPT_HELP = 1,
679b4943 35 OPT_LIST_OPTIONS,
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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},
679b4943 41 {"list-options", 0, POPT_ARG_NONE, NULL, OPT_LIST_OPTIONS, NULL, NULL},
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42 {0, 0, 0, 0, 0, 0, 0}
43};
44
45/*
46 * usage
47 */
48static void usage(FILE *ofp)
49{
32a6298d 50 fprintf(ofp, "usage: lttng stop [NAME] [OPTIONS]\n");
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51 fprintf(ofp, "\n");
52 fprintf(ofp, "Where NAME is an optional session name. If not specified, lttng will\n");
53 fprintf(ofp, "get it from the configuration directory (.lttng).\n");
54 fprintf(ofp, "\n");
32a6298d 55 fprintf(ofp, "Options:\n");
f3ed775e 56 fprintf(ofp, " -h, --help Show this help\n");
679b4943 57 fprintf(ofp, " --list-options Simple listing of options\n");
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58 fprintf(ofp, "\n");
59}
60
61/*
cd80958d 62 * Start tracing for all trace of the session.
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63 */
64static int stop_tracing(void)
65{
ae856491 66 int ret;
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67 char *session_name;
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
6a4f824d 79 ret = lttng_stop_tracing(session_name);
f3ed775e 80 if (ret < 0) {
42224349 81 switch (-ret) {
f73fabfd 82 case LTTNG_ERR_TRACE_ALREADY_STOPPED:
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83 WARN("Tracing already stopped for session %s", session_name);
84 break;
85 default:
86 ERR("%s", lttng_strerror(ret));
87 break;
88 }
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89 goto free_name;
90 }
91
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92 ret = CMD_SUCCESS;
93
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94 MSG("Tracing stopped for session %s", session_name);
95
96free_name:
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97 if (opt_session_name == NULL) {
98 free(session_name);
99 }
cd80958d 100
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101error:
102 return ret;
103}
104
105/*
106 * cmd_stop
107 *
108 * The 'stop <options>' first level command
109 */
110int cmd_stop(int argc, const char **argv)
111{
ca1c3607 112 int opt, ret = CMD_SUCCESS;
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113 static poptContext pc;
114
115 pc = poptGetContext(NULL, argc, argv, long_options, 0);
116 poptReadDefaultConfig(pc, 0);
117
118 while ((opt = poptGetNextOpt(pc)) != -1) {
119 switch (opt) {
120 case OPT_HELP:
ca1c3607 121 usage(stdout);
f3ed775e 122 goto end;
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123 case OPT_LIST_OPTIONS:
124 list_cmd_options(stdout, long_options);
679b4943 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 = stop_tracing();
136
137end:
ca1c3607 138 poptFreeContext(pc);
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139 return ret;
140}
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