Cleanup: unused assignation of ret value
[lttng-tools.git] / src / lib / lttng-ctl / save.c
1 /*
2 * Copyright (C) 2013 - Jérémie Galarneau <jeremie.galarneau@efficios.com>
3 *
4 * This library is free software; you can redistribute it and/or modify it
5 * under the terms of the GNU Lesser General Public License, version 2.1 only,
6 * as published by the Free Software Foundation.
7 *
8 * This library is distributed in the hope that it will be useful, but WITHOUT
9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
11 * for more details.
12 *
13 * You should have received a copy of the GNU Lesser General Public License
14 * along with this library; if not, write to the Free Software Foundation,
15 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
16 */
17
18 #define _LGPL_SOURCE
19 #include <assert.h>
20 #include <string.h>
21
22 #include <lttng/lttng-error.h>
23 #include <lttng/save.h>
24 #include <lttng/save-internal.h>
25 #include <common/sessiond-comm/sessiond-comm.h>
26
27 #include "lttng-ctl-helper.h"
28
29 struct lttng_save_session_attr *lttng_save_session_attr_create(void)
30 {
31 return zmalloc(sizeof(struct lttng_save_session_attr));
32 }
33
34 void lttng_save_session_attr_destroy(struct lttng_save_session_attr *output)
35 {
36 if (output) {
37 free(output);
38 }
39 }
40
41 const char *lttng_save_session_attr_get_session_name(
42 struct lttng_save_session_attr *attr)
43 {
44 const char *ret = NULL;
45
46 if (attr && attr->session_name[0]) {
47 ret = attr->session_name;
48 }
49
50 return ret;
51 }
52
53 const char *lttng_save_session_attr_get_output_url(
54 struct lttng_save_session_attr *attr)
55 {
56 const char *ret = NULL;
57
58 if (attr && attr->configuration_url[0]) {
59 ret = attr->configuration_url;
60 }
61
62 return ret;
63 }
64
65 int lttng_save_session_attr_get_overwrite(
66 struct lttng_save_session_attr *attr)
67 {
68 return attr ? attr->overwrite : -LTTNG_ERR_INVALID;
69 }
70
71 int lttng_save_session_attr_get_omit_name(
72 struct lttng_save_session_attr *attr)
73 {
74 return attr ? attr->omit_name : -LTTNG_ERR_INVALID;
75 }
76
77 int lttng_save_session_attr_get_omit_output(
78 struct lttng_save_session_attr *attr)
79 {
80 return attr ? attr->omit_output : -LTTNG_ERR_INVALID;
81 }
82
83 int lttng_save_session_attr_set_session_name(
84 struct lttng_save_session_attr *attr, const char *session_name)
85 {
86 int ret = 0;
87
88 if (!attr) {
89 ret = -LTTNG_ERR_INVALID;
90 goto error;
91 }
92
93 if (session_name) {
94 size_t len;
95
96 len = strlen(session_name);
97 if (len >= LTTNG_NAME_MAX) {
98 ret = -LTTNG_ERR_INVALID;
99 goto error;
100 }
101
102 ret = lttng_strncpy(attr->session_name, session_name,
103 sizeof(attr->session_name));
104 if (ret) {
105 ret = -LTTNG_ERR_INVALID;
106 goto error;
107 }
108 } else {
109 attr->session_name[0] = '\0';
110 }
111 error:
112 return ret;
113 }
114
115 int lttng_save_session_attr_set_output_url(
116 struct lttng_save_session_attr *attr, const char *url)
117 {
118 int ret = 0;
119 size_t len;
120 ssize_t size;
121 struct lttng_uri *uris = NULL;
122
123 if (!attr) {
124 ret = -LTTNG_ERR_INVALID;
125 goto error;
126 }
127
128 if (!url) {
129 attr->configuration_url[0] = '\0';
130 ret = 0;
131 goto end;
132 }
133
134 len = strlen(url);
135 if (len >= PATH_MAX) {
136 ret = -LTTNG_ERR_INVALID;
137 goto error;
138 }
139
140 size = uri_parse_str_urls(url, NULL, &uris);
141 if (size <= 0 || uris[0].dtype != LTTNG_DST_PATH) {
142 ret = -LTTNG_ERR_INVALID;
143 goto error;
144 }
145
146 /* Copy string plus the NULL terminated byte. */
147 lttng_ctl_copy_string(attr->configuration_url, uris[0].dst.path,
148 sizeof(attr->configuration_url));
149
150 end:
151 error:
152 free(uris);
153 return ret;
154 }
155
156 int lttng_save_session_attr_set_overwrite(
157 struct lttng_save_session_attr *attr, int overwrite)
158 {
159 int ret = 0;
160
161 if (!attr) {
162 ret = -LTTNG_ERR_INVALID;
163 goto end;
164 }
165
166 attr->overwrite = !!overwrite;
167 end:
168 return ret;
169 }
170
171 int lttng_save_session_attr_set_omit_name(
172 struct lttng_save_session_attr *attr, int omit_name)
173 {
174 int ret = 0;
175
176 if (!attr) {
177 ret = -LTTNG_ERR_INVALID;
178 goto end;
179 }
180
181 attr->omit_name = !!omit_name;
182 end:
183 return ret;
184 }
185
186 int lttng_save_session_attr_set_omit_output(
187 struct lttng_save_session_attr *attr, int omit_output)
188 {
189 int ret = 0;
190
191 if (!attr) {
192 ret = -LTTNG_ERR_INVALID;
193 goto end;
194 }
195
196 attr->omit_output = !!omit_output;
197 end:
198 return ret;
199 }
200
201 /*
202 * The lttng-ctl API does not expose all the information needed to save the
203 * session configurations. Thus, we must send a save command to the session
204 * daemon which will, in turn, save its current session configuration.
205 */
206 int lttng_save_session(struct lttng_save_session_attr *attr)
207 {
208 struct lttcomm_session_msg lsm;
209 int ret;
210
211 if (!attr) {
212 ret = -LTTNG_ERR_INVALID;
213 goto end;
214 }
215
216 memset(&lsm, 0, sizeof(lsm));
217 lsm.cmd_type = LTTNG_SAVE_SESSION;
218
219 memcpy(&lsm.u.save_session.attr, attr,
220 sizeof(struct lttng_save_session_attr));
221 ret = lttng_ctl_ask_sessiond(&lsm, NULL);
222 end:
223 return ret;
224 }
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