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
27extern void uv__set_process_title_platform_init(void);
28extern void uv__set_process_title(const char* title);
29
30static uv_mutex_t process_title_mutex;
31static uv_once_t process_title_mutex_once = UV_ONCE_INIT;
32static void* args_mem;
33
34static struct {
35 char* str;
36 size_t len;
37} process_title;
38
39
40static void init_process_title_mutex_once(void) {
41 uv_mutex_init(&process_title_mutex);
42#ifdef __APPLE__
43 uv__set_process_title_platform_init();
44#endif
45}
46
47
48char** uv_setup_args(int argc, char** argv) {
49 char** new_argv;
50 size_t size;
51 char* s;
52 int i;
53
54 if (argc <= 0)
55 return argv;
56
57 /* Calculate how much memory we need for the argv strings. */
58 size = 0;
59 for (i = 0; i < argc; i++)
60 size += strlen(argv[i]) + 1;
61
62#if defined(__MVS__)
63 /* argv is not adjacent. So just use argv[0] */
64 process_title.str = argv[0];
65 process_title.len = strlen(argv[0]);
66#else
67 process_title.str = argv[0];
68 process_title.len = argv[argc - 1] + strlen(argv[argc - 1]) - argv[0];
69 assert(process_title.len + 1 == size); /* argv memory should be adjacent. */
70#endif
71
72 /* Add space for the argv pointers. */
73 size += (argc + 1) * sizeof(char*);
74
75 new_argv = uv__malloc(size);
76 if (new_argv == NULL)
77 return argv;
78 args_mem = new_argv;
79
80 /* Copy over the strings and set up the pointer table. */
81 s = (char*) &new_argv[argc + 1];
82 for (i = 0; i < argc; i++) {
83 size = strlen(argv[i]) + 1;
84 memcpy(s, argv[i], size);
85 new_argv[i] = s;
86 s += size;
87 }
88 new_argv[i] = NULL;
89
90 return new_argv;
91}
92
93
94int uv_set_process_title(const char* title) {
95 uv_once(&process_title_mutex_once, init_process_title_mutex_once);
96 uv_mutex_lock(&process_title_mutex);
97
98 if (process_title.len != 0) {
99 /* No need to terminate, byte after is always '\0'. */
100 strncpy(process_title.str, title, process_title.len);
101 uv__set_process_title(title);
102 }
103
104 uv_mutex_unlock(&process_title_mutex);
105
106 return 0;
107}
108
109
110int uv_get_process_title(char* buffer, size_t size) {
111 if (buffer == NULL || size == 0)
112 return UV_EINVAL;
113
114 uv_once(&process_title_mutex_once, init_process_title_mutex_once);
115 uv_mutex_lock(&process_title_mutex);
116
117 if (size <= process_title.len) {
118 uv_mutex_unlock(&process_title_mutex);
119 return UV_ENOBUFS;
120 }
121
122 if (process_title.len != 0)
123 memcpy(buffer, process_title.str, process_title.len + 1);
124
125 buffer[process_title.len] = '\0';
126
127 uv_mutex_unlock(&process_title_mutex);
128
129 return 0;
130}
131
132
133UV_DESTRUCTOR(static void free_args_mem(void)) {
134 uv__free(args_mem); /* Keep valgrind happy. */
135 args_mem = NULL;
136}
137