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_setup_args(int argc,char ** argv)40 char** uv_setup_args(int argc, char** argv) {
41 process_title = argc > 0 ? uv__strdup(argv[0]) : NULL;
42 return argv;
43 }
44
45
uv_set_process_title(const char * title)46 int uv_set_process_title(const char* title) {
47 char* new_title;
48
49 new_title = uv__strdup(title);
50 if (new_title == NULL)
51 return UV_ENOMEM;
52
53 uv_once(&process_title_mutex_once, init_process_title_mutex_once);
54 uv_mutex_lock(&process_title_mutex);
55
56 uv__free(process_title);
57 process_title = new_title;
58 setproctitle("%s", title);
59
60 uv_mutex_unlock(&process_title_mutex);
61
62 return 0;
63 }
64
65
uv_get_process_title(char * buffer,size_t size)66 int uv_get_process_title(char* buffer, size_t size) {
67 size_t len;
68
69 if (buffer == NULL || size == 0)
70 return UV_EINVAL;
71
72 uv_once(&process_title_mutex_once, init_process_title_mutex_once);
73 uv_mutex_lock(&process_title_mutex);
74
75 if (process_title != NULL) {
76 len = strlen(process_title) + 1;
77
78 if (size < len) {
79 uv_mutex_unlock(&process_title_mutex);
80 return UV_ENOBUFS;
81 }
82
83 memcpy(buffer, process_title, len);
84 } else {
85 len = 0;
86 }
87
88 uv_mutex_unlock(&process_title_mutex);
89
90 buffer[len] = '\0';
91
92 return 0;
93 }
94