8292787731e4bc36360588d5df3ba4b3ab0a52d4
[lttng-tools.git] / src / bin / lttng / commands / start.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 start [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 * start_tracing
58 *
59 * Start tracing for all trace of the session.
60 */
61 static int start_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 DBG("Starting tracing for session %s", session_name);
77
78 ret = lttng_start_tracing(session_name);
79 if (ret < 0) {
80 goto free_name;
81 }
82
83 MSG("Tracing started for session %s", session_name);
84
85 free_name:
86 if (opt_session_name == NULL) {
87 free(session_name);
88 }
89 error:
90 return ret;
91 }
92
93 /*
94 * cmd_start
95 *
96 * The 'start <options>' first level command
97 */
98 int cmd_start(int argc, const char **argv)
99 {
100 int opt, ret;
101 static poptContext pc;
102
103 pc = poptGetContext(NULL, argc, argv, long_options, 0);
104 poptReadDefaultConfig(pc, 0);
105
106 while ((opt = poptGetNextOpt(pc)) != -1) {
107 switch (opt) {
108 case OPT_HELP:
109 usage(stderr);
110 ret = CMD_SUCCESS;
111 goto end;
112 default:
113 usage(stderr);
114 ret = CMD_UNDEFINED;
115 goto end;
116 }
117 }
118
119 opt_session_name = (char*) poptGetArg(pc);
120
121 ret = start_tracing();
122
123 end:
124 return ret;
125 }
This page took 0.042879 seconds and 3 git commands to generate.