xref: /qemu/system/datadir.c (revision 12963e79ca461db7b098c8eb00bb21cf88a250a4)
1 /*
2  * QEMU firmware and keymap file search
3  *
4  * Copyright (c) 2003-2020 QEMU contributors
5  *
6  * Permission is hereby granted, free of charge, to any person obtaining a copy
7  * of this software and associated documentation files (the "Software"), to deal
8  * in the Software without restriction, including without limitation the rights
9  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10  * copies of the Software, and to permit persons to whom the Software is
11  * furnished to do so, subject to the following conditions:
12  *
13  * The above copyright notice and this permission notice shall be included in
14  * all copies or substantial portions of the Software.
15  *
16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
22  * THE SOFTWARE.
23  */
24 
25 #include "qemu/osdep.h"
26 #include "qemu/datadir.h"
27 #include "qemu/cutils.h"
28 #include "trace.h"
29 
30 static const char *data_dir[16];
31 static int data_dir_idx;
32 
qemu_find_file(QemuFileType type,const char * name)33 char *qemu_find_file(QemuFileType type, const char *name)
34 {
35     int i;
36     const char *subdir;
37     char *buf;
38 
39     /* Try the name as a straight path first */
40     if (access(name, R_OK) == 0) {
41         trace_load_file(name, name);
42         return g_strdup(name);
43     }
44 
45     switch (type) {
46     case QEMU_FILE_TYPE_BIOS:
47         subdir = "";
48         break;
49     case QEMU_FILE_TYPE_DTB:
50         subdir = "dtb/";
51         break;
52     case QEMU_FILE_TYPE_KEYMAP:
53         subdir = "keymaps/";
54         break;
55     default:
56         abort();
57     }
58 
59     for (i = 0; i < data_dir_idx; i++) {
60         buf = g_strdup_printf("%s/%s%s", data_dir[i], subdir, name);
61         if (access(buf, R_OK) == 0) {
62             trace_load_file(name, buf);
63             return buf;
64         }
65         g_free(buf);
66     }
67     return NULL;
68 }
69 
qemu_add_data_dir(char * path)70 void qemu_add_data_dir(char *path)
71 {
72     int i;
73 
74     if (path == NULL) {
75         return;
76     }
77     if (data_dir_idx == ARRAY_SIZE(data_dir)) {
78         return;
79     }
80     for (i = 0; i < data_dir_idx; i++) {
81         if (strcmp(data_dir[i], path) == 0) {
82             g_free(path); /* duplicate */
83             return;
84         }
85     }
86     data_dir[data_dir_idx++] = path;
87 }
88 
qemu_add_default_firmwarepath(void)89 void qemu_add_default_firmwarepath(void)
90 {
91     static const char * const dirs[] = {
92         CONFIG_QEMU_FIRMWAREPATH
93         NULL
94     };
95 
96     size_t i;
97 
98     /* add configured firmware directories */
99     for (i = 0; dirs[i] != NULL; i++) {
100         qemu_add_data_dir(get_relocated_path(dirs[i]));
101     }
102 
103     /* try to find datadir relative to the executable path */
104     qemu_add_data_dir(get_relocated_path(CONFIG_QEMU_DATADIR));
105 }
106 
qemu_list_data_dirs(void)107 void qemu_list_data_dirs(void)
108 {
109     int i;
110     for (i = 0; i < data_dir_idx; i++) {
111         printf("%s\n", data_dir[i]);
112     }
113 }
114