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