Add a '--list-options' option to each command.
[lttng-tools.git] / src / bin / lttng / utils.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 along
15 * with this program; if not, write to the Free Software Foundation, Inc.,
16 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
17 */
18
19 #include <stdlib.h>
20 #include <ctype.h>
21
22 #include <common/error.h>
23
24 #include "conf.h"
25 #include "utils.h"
26
27 /*
28 * get_session_name
29 *
30 * Return allocated string with the session name found in the config
31 * directory.
32 */
33 char *get_session_name(void)
34 {
35 char *path, *session_name = NULL;
36
37 /* Get path to config file */
38 path = config_get_default_path();
39 if (path == NULL) {
40 goto error;
41 }
42
43 /* Get session name from config */
44 session_name = config_read_session_name(path);
45 if (session_name == NULL) {
46 goto error;
47 }
48
49 error:
50 DBG("Session name found: %s", session_name);
51 return session_name;
52 }
53
54
55 /*
56 * list_cmd_options
57 *
58 * Prints a simple list of the options available to a command. This is intended
59 * to be easily parsed for bash completion.
60 */
61 void list_cmd_options(FILE *ofp, struct poptOption *options)
62 {
63 int i;
64 struct poptOption *option = NULL;
65
66 for (i = 0; options[i].longName != NULL; i++) {
67 option = &options[i];
68
69 fprintf(ofp, "--%s\n", option->longName);
70
71 if (isprint(option->shortName)) {
72 fprintf(ofp, "-%c\n", option->shortName);
73 }
74 }
75 }
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