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      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/adb.h"
     35 }
     36 
     37 static RecoveryUI* ui = NULL;
     38 
     39 static void
     40 set_usb_driver(bool enabled) {
     41     int fd = open("/sys/class/android_usb/android0/enable", O_WRONLY);
     42     if (fd < 0) {
     43         ui->Print("failed to open driver control: %s\n", strerror(errno));
     44         return;
     45     }
     46     if (write(fd, enabled ? "1" : "0", 1) < 0) {
     47         ui->Print("failed to set driver control: %s\n", strerror(errno));
     48     }
     49     if (close(fd) < 0) {
     50         ui->Print("failed to close driver control: %s\n", strerror(errno));
     51     }
     52 }
     53 
     54 static void
     55 stop_adbd() {
     56     property_set("ctl.stop", "adbd");
     57     set_usb_driver(false);
     58 }
     59 
     60 
     61 static void
     62 maybe_restart_adbd() {
     63     char value[PROPERTY_VALUE_MAX+1];
     64     int len = property_get("ro.debuggable", value, NULL);
     65     if (len == 1 && value[0] == '1') {
     66         ui->Print("Restarting adbd...\n");
     67         set_usb_driver(true);
     68         property_set("ctl.start", "adbd");
     69     }
     70 }
     71 
     72 int
     73 apply_from_adb(RecoveryUI* ui_, int* wipe_cache, const char* install_file) {
     74     ui = ui_;
     75 
     76     stop_adbd();
     77     set_usb_driver(true);
     78 
     79     ui->Print("\n\nNow send the package you want to apply\n"
     80               "to the device with \"adb sideload <filename>\"...\n");
     81 
     82     pid_t child;
     83     if ((child = fork()) == 0) {
     84         execl("/sbin/recovery", "recovery", "--adbd", NULL);
     85         _exit(-1);
     86     }
     87     int status;
     88     // TODO(dougz): there should be a way to cancel waiting for a
     89     // package (by pushing some button combo on the device).  For now
     90     // you just have to 'adb sideload' a file that's not a valid
     91     // package, like "/dev/null".
     92     waitpid(child, &status, 0);
     93     if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) {
     94         ui->Print("status %d\n", WEXITSTATUS(status));
     95     }
     96 
     97     set_usb_driver(false);
     98     maybe_restart_adbd();
     99 
    100     struct stat st;
    101     if (stat(ADB_SIDELOAD_FILENAME, &st) != 0) {
    102         if (errno == ENOENT) {
    103             ui->Print("No package received.\n");
    104         } else {
    105             ui->Print("Error reading package:\n  %s\n", strerror(errno));
    106         }
    107         return INSTALL_ERROR;
    108     }
    109     return install_package(ADB_SIDELOAD_FILENAME, wipe_cache, install_file);
    110 }
    111