702967afb1
It won't actually do anything until the 'bu' tool and framework are updated to respond properly, but this is the adb side of the necessary infrastructure: we copy the tarfile into the socket pointed at the device, using the existing mechanisms. Change-Id: Ic3b5779ade256bd1ad989a94b0685f7b1a7d59d2
107 lines
3.2 KiB
C
107 lines
3.2 KiB
C
/*
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* Copyright (C) 2011 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <unistd.h>
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#include <stdio.h>
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#include "sysdeps.h"
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#define TRACE_TAG TRACE_ADB
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#include "adb.h"
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/* returns the data socket passing the backup data here for forwarding */
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int backup_service(BackupOperation op, char* args) {
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pid_t pid;
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int s[2];
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char* operation;
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int socketnum;
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// Command string and choice of stdin/stdout for the pipe depend on our invocation
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if (op == BACKUP) {
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operation = "backup";
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socketnum = STDOUT_FILENO;
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} else {
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operation = "restore";
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socketnum = STDIN_FILENO;
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}
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D("backup_service(%s, %s)\n", operation, args);
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// set up the pipe from the subprocess to here
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// parent will read s[0]; child will write s[1]
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if (adb_socketpair(s)) {
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D("can't create backup/restore socketpair\n");
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fprintf(stderr, "unable to create backup/restore socketpair\n");
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return -1;
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}
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// spin off the child process to run the backup command
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pid = fork();
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if (pid < 0) {
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// failure
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D("can't fork for %s\n", operation);
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fprintf(stderr, "unable to fork for %s\n", operation);
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adb_close(s[0]);
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adb_close(s[1]);
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return -1;
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}
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// Great, we're off and running.
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if (pid == 0) {
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char* p;
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int argc;
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char** bu_args;
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// child -- actually run the backup here
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argc = 2; // room for the basic 'bu' argv[0] and '[operation]' argv[1]
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for (p = (char*)args; p && *p; ) {
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argc++;
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while (*p && *p != ':') p++;
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if (*p == ':') p++;
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}
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bu_args = (char**) alloca(argc*sizeof(char*) + 1);
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bu_args[0] = "bu";
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bu_args[1] = operation;
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argc = 2; // run through again to build the argv array
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for (p = (char*)args; p && *p; ) {
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bu_args[argc++] = p;
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while (*p && *p != ':') p++;
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if (*p == ':') {
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*p = 0;
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p++;
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}
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}
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bu_args[argc] = NULL;
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// Close the half of the socket that we don't care about, route 'bu's console
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// to the output socket, and off we go
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adb_close(s[0]);
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dup2(s[1], socketnum);
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// off we go
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execvp("/system/bin/bu", (char * const *)bu_args);
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// oops error - close up shop and go home
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fprintf(stderr, "Unable to exec 'bu', bailing\n");
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exit(-1);
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} else {
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// parent, i.e. adbd -- close the sending half of the socket
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adb_close(s[1]);
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}
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// we'll be reading from s[0] as the data is sent by the child process
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return s[0];
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}
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