1 /* Copyright libuv project contributors. All rights reserved.
2 *
3 * Permission is hereby granted, free of charge, to any person obtaining a copy
4 * of this software and associated documentation files (the "Software"), to
5 * deal in the Software without restriction, including without limitation the
6 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
7 * sell copies of the Software, and to permit persons to whom the Software is
8 * furnished to do so, subject to the following conditions:
9 *
10 * The above copyright notice and this permission notice shall be included in
11 * all copies or substantial portions of the Software.
12 *
13 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
14 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
15 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
16 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
17 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
18 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
19 * IN THE SOFTWARE.
20 */
21
22 #include "uv.h"
23 #include "internal.h"
24
25 #include <sys/types.h>
26 #include <unistd.h>
27
28
29 static uv_mutex_t process_title_mutex;
30 static uv_once_t process_title_mutex_once = UV_ONCE_INIT;
31 static char* process_title;
32
33
init_process_title_mutex_once(void)34 static void init_process_title_mutex_once(void) {
35 if (uv_mutex_init(&process_title_mutex))
36 abort();
37 }
38
39
uv__process_title_cleanup(void)40 void uv__process_title_cleanup(void) {
41 uv_once(&process_title_mutex_once, init_process_title_mutex_once);
42 uv_mutex_destroy(&process_title_mutex);
43 }
44
45
uv_setup_args(int argc,char ** argv)46 char** uv_setup_args(int argc, char** argv) {
47 process_title = argc > 0 ? uv__strdup(argv[0]) : NULL;
48 return argv;
49 }
50
51
uv_set_process_title(const char * title)52 int uv_set_process_title(const char* title) {
53 char* new_title;
54
55 new_title = uv__strdup(title);
56 if (new_title == NULL)
57 return UV_ENOMEM;
58
59 uv_once(&process_title_mutex_once, init_process_title_mutex_once);
60 uv_mutex_lock(&process_title_mutex);
61
62 uv__free(process_title);
63 process_title = new_title;
64 setproctitle("%s", title);
65
66 uv_mutex_unlock(&process_title_mutex);
67
68 return 0;
69 }
70
71
uv_get_process_title(char * buffer,size_t size)72 int uv_get_process_title(char* buffer, size_t size) {
73 size_t len;
74
75 if (buffer == NULL || size == 0)
76 return UV_EINVAL;
77
78 uv_once(&process_title_mutex_once, init_process_title_mutex_once);
79 uv_mutex_lock(&process_title_mutex);
80
81 if (process_title != NULL) {
82 len = strlen(process_title) + 1;
83
84 if (size < len) {
85 uv_mutex_unlock(&process_title_mutex);
86 return UV_ENOBUFS;
87 }
88
89 memcpy(buffer, process_title, len);
90 } else {
91 len = 0;
92 }
93
94 uv_mutex_unlock(&process_title_mutex);
95
96 buffer[len] = '\0';
97
98 return 0;
99 }
100