summaryrefslogtreecommitdiffstats
path: root/adb_install.cpp
blob: 4aed9d4b1cac6a99618b200dc464a935d610c5fd (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
/*
 * Copyright (C) 2012 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include <unistd.h>
#include <dirent.h>
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <sys/stat.h>
#include <signal.h>
#include <fcntl.h>

#include "ui.h"
#include "cutils/properties.h"
#include "install.h"
#include "common.h"
#include "adb_install.h"
#include "minadbd/fuse_adb_provider.h"
#include "fuse_sideload.h"

static RecoveryUI* ui = NULL;

static void
set_usb_driver(bool enabled) {
    int fd = open("/sys/class/android_usb/android0/enable", O_WRONLY);
    if (fd < 0) {
        ui->Print("failed to open driver control: %s\n", strerror(errno));
        return;
    }
    if (TEMP_FAILURE_RETRY(write(fd, enabled ? "1" : "0", 1)) == -1) {
        ui->Print("failed to set driver control: %s\n", strerror(errno));
    }
    if (close(fd) < 0) {
        ui->Print("failed to close driver control: %s\n", strerror(errno));
    }
}

static void
stop_adbd() {
    property_set("ctl.stop", "adbd");
    set_usb_driver(false);
}


static void
maybe_restart_adbd() {
    if (is_ro_debuggable()) {
        ui->Print("Restarting adbd...\n");
        set_usb_driver(true);
        property_set("ctl.start", "adbd");
    }
}

// How long (in seconds) we wait for the host to start sending us a
// package, before timing out.
#define ADB_INSTALL_TIMEOUT 300

int
apply_from_adb(RecoveryUI* ui_, bool* wipe_cache, const char* install_file) {
    modified_flash = true;

    ui = ui_;

    stop_adbd();
    set_usb_driver(true);

    ui->Print("\n\nNow send the package you want to apply\n"
              "to the device with \"adb sideload <filename>\"...\n");

    pid_t child;
    if ((child = fork()) == 0) {
        execl("/sbin/recovery", "recovery", "--adbd", NULL);
        _exit(-1);
    }

    // FUSE_SIDELOAD_HOST_PATHNAME will start to exist once the host
    // connects and starts serving a package.  Poll for its
    // appearance.  (Note that inotify doesn't work with FUSE.)
    int result = INSTALL_ERROR;
    int status;
    bool waited = false;
    struct stat st;
    for (int i = 0; i < ADB_INSTALL_TIMEOUT; ++i) {
        if (waitpid(child, &status, WNOHANG) != 0) {
            result = INSTALL_ERROR;
            waited = true;
            break;
        }

        if (stat(FUSE_SIDELOAD_HOST_PATHNAME, &st) != 0) {
            if (errno == ENOENT && i < ADB_INSTALL_TIMEOUT-1) {
                sleep(1);
                continue;
            } else {
                ui->Print("\nTimed out waiting for package.\n\n");
                result = INSTALL_ERROR;
                kill(child, SIGKILL);
                break;
            }
        }
        result = install_package(FUSE_SIDELOAD_HOST_PATHNAME, wipe_cache, install_file, false, 0);
        break;
    }

    if (!waited) {
        // Calling stat() on this magic filename signals the minadbd
        // subprocess to shut down.
        stat(FUSE_SIDELOAD_HOST_EXIT_PATHNAME, &st);

        // TODO(dougz): there should be a way to cancel waiting for a
        // package (by pushing some button combo on the device).  For now
        // you just have to 'adb sideload' a file that's not a valid
        // package, like "/dev/null".
        waitpid(child, &status, 0);
    }

    if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) {
        if (WEXITSTATUS(status) == 3) {
            ui->Print("\nYou need adb 1.0.32 or newer to sideload\nto this device.\n\n");
        } else if (!WIFSIGNALED(status)) {
            ui->Print("\n(adbd status %d)\n", WEXITSTATUS(status));
        }
    }

    set_usb_driver(false);
    maybe_restart_adbd();

    return result;
}