|
160
|
1 /* Copyright Joyent, Inc. and other Node contributors. All rights reserved.
|
|
|
2 * Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
|
3 * of this software and associated documentation files (the "Software"), to
|
|
|
4 * deal in the Software without restriction, including without limitation the
|
|
|
5 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
|
|
|
6 * sell copies of the Software, and to permit persons to whom the Software is
|
|
|
7 * furnished to do so, subject to the following conditions:
|
|
|
8 *
|
|
|
9 * The above copyright notice and this permission notice shall be included in
|
|
|
10 * all copies or substantial portions of the Software.
|
|
|
11 *
|
|
|
12 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
|
13 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
|
14 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
|
15 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
|
16 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
|
|
|
17 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
|
|
|
18 * IN THE SOFTWARE.
|
|
|
19 */
|
|
|
20
|
|
|
21 #include "uv.h"
|
|
|
22 #include "internal.h"
|
|
|
23
|
|
|
24 #include <stdlib.h>
|
|
|
25 #include <string.h>
|
|
|
26
|
|
|
27 struct uv__process_title {
|
|
|
28 char* str;
|
|
|
29 size_t len; /* Length of the current process title. */
|
|
|
30 size_t cap; /* Maximum capacity. Computed once in uv_setup_args(). */
|
|
|
31 };
|
|
|
32
|
|
|
33 extern void uv__set_process_title(const char* title);
|
|
|
34
|
|
|
35 static uv_mutex_t process_title_mutex;
|
|
|
36 static uv_once_t process_title_mutex_once = UV_ONCE_INIT;
|
|
|
37 static struct uv__process_title process_title;
|
|
|
38 static void* args_mem;
|
|
|
39
|
|
|
40
|
|
|
41 static void init_process_title_mutex_once(void) {
|
|
|
42 uv_mutex_init(&process_title_mutex);
|
|
|
43 }
|
|
|
44
|
|
|
45
|
|
|
46 char** uv_setup_args(int argc, char** argv) {
|
|
|
47 struct uv__process_title pt;
|
|
|
48 char** new_argv;
|
|
|
49 size_t size;
|
|
|
50 char* s;
|
|
|
51 int i;
|
|
|
52
|
|
|
53 if (argc <= 0)
|
|
|
54 return argv;
|
|
|
55
|
|
|
56 pt.str = argv[0];
|
|
|
57 pt.len = strlen(argv[0]);
|
|
|
58 pt.cap = pt.len + 1;
|
|
|
59
|
|
|
60 /* Calculate how much memory we need for the argv strings. */
|
|
|
61 size = pt.cap;
|
|
|
62 for (i = 1; i < argc; i++)
|
|
|
63 size += strlen(argv[i]) + 1;
|
|
|
64
|
|
|
65 /* Add space for the argv pointers. */
|
|
|
66 size += (argc + 1) * sizeof(char*);
|
|
|
67
|
|
|
68 new_argv = uv__malloc(size);
|
|
|
69 if (new_argv == NULL)
|
|
|
70 return argv;
|
|
|
71
|
|
|
72 /* Copy over the strings and set up the pointer table. */
|
|
|
73 i = 0;
|
|
|
74 s = (char*) &new_argv[argc + 1];
|
|
|
75 size = pt.cap;
|
|
|
76 goto loop;
|
|
|
77
|
|
|
78 for (/* empty */; i < argc; i++) {
|
|
|
79 size = strlen(argv[i]) + 1;
|
|
|
80 loop:
|
|
|
81 memcpy(s, argv[i], size);
|
|
|
82 new_argv[i] = s;
|
|
|
83 s += size;
|
|
|
84 }
|
|
|
85 new_argv[i] = NULL;
|
|
|
86
|
|
|
87 pt.cap = argv[i - 1] + size - argv[0];
|
|
|
88
|
|
|
89 args_mem = new_argv;
|
|
|
90 process_title = pt;
|
|
|
91
|
|
|
92 return new_argv;
|
|
|
93 }
|
|
|
94
|
|
|
95
|
|
|
96 int uv_set_process_title(const char* title) {
|
|
|
97 struct uv__process_title* pt;
|
|
|
98 size_t len;
|
|
|
99
|
|
|
100 /* If uv_setup_args wasn't called or failed, we can't continue. */
|
|
|
101 if (args_mem == NULL)
|
|
|
102 return UV_ENOBUFS;
|
|
|
103
|
|
|
104 pt = &process_title;
|
|
|
105 len = strlen(title);
|
|
|
106
|
|
|
107 uv_once(&process_title_mutex_once, init_process_title_mutex_once);
|
|
|
108 uv_mutex_lock(&process_title_mutex);
|
|
|
109
|
|
|
110 if (len >= pt->cap) {
|
|
|
111 len = 0;
|
|
|
112 if (pt->cap > 0)
|
|
|
113 len = pt->cap - 1;
|
|
|
114 }
|
|
|
115
|
|
|
116 memcpy(pt->str, title, len);
|
|
|
117 memset(pt->str + len, '\0', pt->cap - len);
|
|
|
118 pt->len = len;
|
|
|
119 uv__set_process_title(pt->str);
|
|
|
120
|
|
|
121 uv_mutex_unlock(&process_title_mutex);
|
|
|
122
|
|
|
123 return 0;
|
|
|
124 }
|
|
|
125
|
|
|
126
|
|
|
127 int uv_get_process_title(char* buffer, size_t size) {
|
|
|
128 if (buffer == NULL || size == 0)
|
|
|
129 return UV_EINVAL;
|
|
|
130
|
|
|
131 /* If uv_setup_args wasn't called or failed, we can't continue. */
|
|
|
132 if (args_mem == NULL)
|
|
|
133 return UV_ENOBUFS;
|
|
|
134
|
|
|
135 uv_once(&process_title_mutex_once, init_process_title_mutex_once);
|
|
|
136 uv_mutex_lock(&process_title_mutex);
|
|
|
137
|
|
|
138 if (size <= process_title.len) {
|
|
|
139 uv_mutex_unlock(&process_title_mutex);
|
|
|
140 return UV_ENOBUFS;
|
|
|
141 }
|
|
|
142
|
|
|
143 if (process_title.len != 0)
|
|
|
144 memcpy(buffer, process_title.str, process_title.len + 1);
|
|
|
145
|
|
|
146 buffer[process_title.len] = '\0';
|
|
|
147
|
|
|
148 uv_mutex_unlock(&process_title_mutex);
|
|
|
149
|
|
|
150 return 0;
|
|
|
151 }
|
|
|
152
|
|
|
153
|
|
|
154 void uv__process_title_cleanup(void) {
|
|
|
155 uv__free(args_mem); /* Keep valgrind happy. */
|
|
|
156 args_mem = NULL;
|
|
|
157 }
|
