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-common.h"
27 #include "qemu/datadir.h"
28 #include "qemu/cutils.h"
29 #include "trace.h"
30
31 static const char *data_dir[16];
32 static int data_dir_idx;
33
qemu_find_file(int type,const char * name)34 char *qemu_find_file(int type, const char *name)
35 {
36 int i;
37 const char *subdir;
38 char *buf;
39
40 /* Try the name as a straight path first */
41 if (access(name, R_OK) == 0) {
42 trace_load_file(name, name);
43 return g_strdup(name);
44 }
45
46 switch (type) {
47 case QEMU_FILE_TYPE_BIOS:
48 subdir = "";
49 break;
50 case QEMU_FILE_TYPE_KEYMAP:
51 subdir = "keymaps/";
52 break;
53 default:
54 abort();
55 }
56
57 for (i = 0; i < data_dir_idx; i++) {
58 buf = g_strdup_printf("%s/%s%s", data_dir[i], subdir, name);
59 if (access(buf, R_OK) == 0) {
60 trace_load_file(name, buf);
61 return buf;
62 }
63 g_free(buf);
64 }
65 return NULL;
66 }
67
qemu_add_data_dir(char * path)68 void qemu_add_data_dir(char *path)
69 {
70 int i;
71
72 if (path == NULL) {
73 return;
74 }
75 if (data_dir_idx == ARRAY_SIZE(data_dir)) {
76 return;
77 }
78 for (i = 0; i < data_dir_idx; i++) {
79 if (strcmp(data_dir[i], path) == 0) {
80 g_free(path); /* duplicate */
81 return;
82 }
83 }
84 data_dir[data_dir_idx++] = path;
85 }
86
87 /*
88 * Find a likely location for support files using the location of the binary.
89 * When running from the build tree this will be "$bindir/pc-bios".
90 * Otherwise, this is CONFIG_QEMU_DATADIR (possibly relocated).
91 *
92 * The caller must use g_free() to free the returned data when it is
93 * no longer required.
94 */
find_datadir(void)95 static char *find_datadir(void)
96 {
97 g_autofree char *dir = NULL;
98
99 dir = g_build_filename(qemu_get_exec_dir(), "pc-bios", NULL);
100 if (g_file_test(dir, G_FILE_TEST_IS_DIR)) {
101 return g_steal_pointer(&dir);
102 }
103
104 return get_relocated_path(CONFIG_QEMU_DATADIR);
105 }
106
qemu_add_default_firmwarepath(void)107 void qemu_add_default_firmwarepath(void)
108 {
109 char **dirs;
110 size_t i;
111
112 /* add configured firmware directories */
113 dirs = g_strsplit(CONFIG_QEMU_FIRMWAREPATH, G_SEARCHPATH_SEPARATOR_S, 0);
114 for (i = 0; dirs[i] != NULL; i++) {
115 qemu_add_data_dir(get_relocated_path(dirs[i]));
116 }
117 g_strfreev(dirs);
118
119 /* try to find datadir relative to the executable path */
120 qemu_add_data_dir(find_datadir());
121 }
122
qemu_list_data_dirs(void)123 void qemu_list_data_dirs(void)
124 {
125 int i;
126 for (i = 0; i < data_dir_idx; i++) {
127 printf("%s\n", data_dir[i]);
128 }
129 }
130