1 /*
2 * Copyright (C) 2012 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 <unistd.h>
18 #include <dirent.h>
19 #include <errno.h>
20 #include <stdlib.h>
21 #include <string.h>
22 #include <sys/types.h>
23 #include <sys/wait.h>
24 #include <sys/stat.h>
25 #include <signal.h>
26 #include <fcntl.h>
27
28 #include "ui.h"
29 #include "cutils/properties.h"
30 #include "install.h"
31 #include "common.h"
32 #include "adb_install.h"
33 extern "C" {
34 #include "minadbd/fuse_adb_provider.h"
35 #include "fuse_sideload.h"
36 }
37
38 static RecoveryUI* ui = NULL;
39
40 static void
set_usb_driver(bool enabled)41 set_usb_driver(bool enabled) {
42 int fd = open("/sys/class/android_usb/android0/enable", O_WRONLY);
43 if (fd < 0) {
44 ui->Print("failed to open driver control: %s\n", strerror(errno));
45 return;
46 }
47 if (write(fd, enabled ? "1" : "0", 1) < 0) {
48 ui->Print("failed to set driver control: %s\n", strerror(errno));
49 }
50 if (close(fd) < 0) {
51 ui->Print("failed to close driver control: %s\n", strerror(errno));
52 }
53 }
54
55 static void
stop_adbd()56 stop_adbd() {
57 property_set("ctl.stop", "adbd");
58 set_usb_driver(false);
59 }
60
61
62 static void
maybe_restart_adbd()63 maybe_restart_adbd() {
64 char value[PROPERTY_VALUE_MAX+1];
65 int len = property_get("ro.debuggable", value, NULL);
66 if (len == 1 && value[0] == '1') {
67 ui->Print("Restarting adbd...\n");
68 set_usb_driver(true);
69 property_set("ctl.start", "adbd");
70 }
71 }
72
73 // How long (in seconds) we wait for the host to start sending us a
74 // package, before timing out.
75 #define ADB_INSTALL_TIMEOUT 300
76
77 int
apply_from_adb(RecoveryUI * ui_,int * wipe_cache,const char * install_file)78 apply_from_adb(RecoveryUI* ui_, int* wipe_cache, const char* install_file) {
79 ui = ui_;
80
81 stop_adbd();
82 set_usb_driver(true);
83
84 ui->Print("\n\nNow send the package you want to apply\n"
85 "to the device with \"adb sideload <filename>\"...\n");
86
87 pid_t child;
88 if ((child = fork()) == 0) {
89 execl("/sbin/recovery", "recovery", "--adbd", NULL);
90 _exit(-1);
91 }
92
93 // FUSE_SIDELOAD_HOST_PATHNAME will start to exist once the host
94 // connects and starts serving a package. Poll for its
95 // appearance. (Note that inotify doesn't work with FUSE.)
96 int result;
97 int status;
98 bool waited = false;
99 struct stat st;
100 for (int i = 0; i < ADB_INSTALL_TIMEOUT; ++i) {
101 if (waitpid(child, &status, WNOHANG) != 0) {
102 result = INSTALL_ERROR;
103 waited = true;
104 break;
105 }
106
107 if (stat(FUSE_SIDELOAD_HOST_PATHNAME, &st) != 0) {
108 if (errno == ENOENT && i < ADB_INSTALL_TIMEOUT-1) {
109 sleep(1);
110 continue;
111 } else {
112 ui->Print("\nTimed out waiting for package.\n\n", strerror(errno));
113 result = INSTALL_ERROR;
114 kill(child, SIGKILL);
115 break;
116 }
117 }
118 result = install_package(FUSE_SIDELOAD_HOST_PATHNAME, wipe_cache, install_file, false);
119 break;
120 }
121
122 if (!waited) {
123 // Calling stat() on this magic filename signals the minadbd
124 // subprocess to shut down.
125 stat(FUSE_SIDELOAD_HOST_EXIT_PATHNAME, &st);
126
127 // TODO(dougz): there should be a way to cancel waiting for a
128 // package (by pushing some button combo on the device). For now
129 // you just have to 'adb sideload' a file that's not a valid
130 // package, like "/dev/null".
131 waitpid(child, &status, 0);
132 }
133
134 if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) {
135 if (WEXITSTATUS(status) == 3) {
136 ui->Print("\nYou need adb 1.0.32 or newer to sideload\nto this device.\n\n");
137 } else if (!WIFSIGNALED(status)) {
138 ui->Print("\n(adbd status %d)\n", WEXITSTATUS(status));
139 }
140 }
141
142 set_usb_driver(false);
143 maybe_restart_adbd();
144
145 return result;
146 }
147