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