usb_vendors.c revision de6f62a609120c3d9e4e53689c3b309842ec874b 
1/*
2 * Copyright (C) 2009 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#include "usb_vendors.h"
18
19#include <stdio.h>
20
21#ifdef _WIN32
22#  define WIN32_LEAN_AND_MEAN
23#  include "windows.h"
24#  include "shlobj.h"
25#else
26#  include <unistd.h>
27#  include <sys/stat.h>
28#endif
29
30#include "sysdeps.h"
31#include "adb.h"
32
33#define ANDROID_PATH            ".android"
34#define ANDROID_ADB_INI         "adb_usb.ini"
35
36#define TRACE_TAG               TRACE_USB
37
38// Google's USB Vendor ID
39#define VENDOR_ID_GOOGLE        0x18d1
40// HTC's USB Vendor ID
41#define VENDOR_ID_HTC           0x0bb4
42// Samsung's USB Vendor ID
43#define VENDOR_ID_SAMSUNG       0x04e8
44// Motorola's USB Vendor ID
45#define VENDOR_ID_MOTOROLA      0x22b8
46
47/** built-in vendor list */
48int builtInVendorIds[] = {
49    VENDOR_ID_GOOGLE,
50    VENDOR_ID_HTC,
51    VENDOR_ID_SAMSUNG,
52    VENDOR_ID_MOTOROLA,
53};
54
55#define BUILT_IN_VENDOR_COUNT    (sizeof(builtInVendorIds)/sizeof(builtInVendorIds[0]))
56
57/* max number of supported vendor ids (built-in + 3rd party). increase as needed */
58#define VENDOR_COUNT_MAX         128
59
60int vendorIds[VENDOR_COUNT_MAX];
61unsigned vendorIdCount = 0;
62
63int get_adb_usb_ini(char* buff, size_t len);
64
65void usb_vendors_init(void)
66{
67    if (VENDOR_COUNT_MAX < BUILT_IN_VENDOR_COUNT) {
68        fprintf(stderr, "VENDOR_COUNT_MAX not big enough for built-in vendor list.\n");
69        exit(2);
70    }
71
72    /* add the built-in vendors at the beginning of the array */
73    memcpy(vendorIds, builtInVendorIds, sizeof(builtInVendorIds));
74
75    /* default array size is the number of built-in vendors */
76    vendorIdCount = BUILT_IN_VENDOR_COUNT;
77
78    if (VENDOR_COUNT_MAX == BUILT_IN_VENDOR_COUNT)
79        return;
80
81    char temp[PATH_MAX];
82    if (get_adb_usb_ini(temp, sizeof(temp)) == 0) {
83        FILE * f = fopen(temp, "rt");
84
85        if (f != NULL) {
86            /* The vendor id file is pretty basic. 1 vendor id per line.
87               Lines starting with # are comments */
88            while (fgets(temp, sizeof(temp), f) != NULL) {
89                if (temp[0] == '#')
90                    continue;
91
92                long value = strtol(temp, NULL, 0);
93                if (errno == EINVAL || errno == ERANGE || value > INT_MAX || value < 0) {
94                    fprintf(stderr, "Invalid content in %s. Quitting.\n", ANDROID_ADB_INI);
95                    exit(2);
96                }
97
98                vendorIds[vendorIdCount++] = (int)value;
99
100                /* make sure we don't go beyond the array */
101                if (vendorIdCount == VENDOR_COUNT_MAX) {
102                    break;
103                }
104            }
105        }
106    }
107}
108
109/* Utils methods */
110
111/* builds the path to the adb vendor id file. returns 0 if success */
112int build_path(char* buff, size_t len, const char* format, const char* home)
113{
114    if (snprintf(buff, len, format, home, ANDROID_PATH, ANDROID_ADB_INI) >= len) {
115        return 1;
116    }
117
118    return 0;
119}
120
121/* fills buff with the path to the adb vendor id file. returns 0 if success */
122int get_adb_usb_ini(char* buff, size_t len)
123{
124#ifdef _WIN32
125    const char* home = getenv("ANDROID_SDK_HOME");
126    if (home != NULL) {
127        return build_path(buff, len, "%s\\%s\\%s", home);
128    } else {
129        char path[MAX_PATH];
130        SHGetFolderPath( NULL, CSIDL_PROFILE, NULL, 0, path);
131        return build_path(buff, len, "%s\\%s\\%s", path);
132    }
133#else
134    const char* home = getenv("HOME");
135    if (home == NULL)
136        home = "/tmp";
137
138    return build_path(buff, len, "%s/%s/%s", home);
139#endif
140}
141