You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
89 lines
2.8 KiB
89 lines
2.8 KiB
/*
|
|
** Copyright 2019, 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 "otapreopt_utils.h"
|
|
|
|
#include <sys/types.h>
|
|
#include <sys/wait.h>
|
|
#include <unistd.h>
|
|
|
|
#include <android-base/logging.h>
|
|
#include <android-base/stringprintf.h>
|
|
#include <android-base/strings.h>
|
|
|
|
using android::base::Join;
|
|
using android::base::StringPrintf;
|
|
|
|
namespace android {
|
|
namespace installd {
|
|
|
|
bool Exec(const std::vector<std::string>& arg_vector, std::string* error_msg) {
|
|
const std::string command_line = Join(arg_vector, ' ');
|
|
|
|
CHECK_GE(arg_vector.size(), 1U) << command_line;
|
|
|
|
// Convert the args to char pointers.
|
|
const char* program = arg_vector[0].c_str();
|
|
std::vector<char*> args;
|
|
for (size_t i = 0; i < arg_vector.size(); ++i) {
|
|
const std::string& arg = arg_vector[i];
|
|
char* arg_str = const_cast<char*>(arg.c_str());
|
|
CHECK(arg_str != nullptr) << i;
|
|
args.push_back(arg_str);
|
|
}
|
|
args.push_back(nullptr);
|
|
|
|
// Fork and exec.
|
|
pid_t pid = fork();
|
|
if (pid == 0) {
|
|
// No allocation allowed between fork and exec.
|
|
|
|
// Change process groups, so we don't get reaped by ProcessManager.
|
|
setpgid(0, 0);
|
|
|
|
execv(program, &args[0]);
|
|
|
|
PLOG(ERROR) << "Failed to execv(" << command_line << ")";
|
|
// _exit to avoid atexit handlers in child.
|
|
_exit(1);
|
|
} else {
|
|
if (pid == -1) {
|
|
*error_msg = StringPrintf("Failed to execv(%s) because fork failed: %s",
|
|
command_line.c_str(), strerror(errno));
|
|
return false;
|
|
}
|
|
|
|
// wait for subprocess to finish
|
|
int status;
|
|
pid_t got_pid = TEMP_FAILURE_RETRY(waitpid(pid, &status, 0));
|
|
if (got_pid != pid) {
|
|
*error_msg = StringPrintf("Failed after fork for execv(%s) because waitpid failed: "
|
|
"wanted %d, got %d: %s",
|
|
command_line.c_str(), pid, got_pid, strerror(errno));
|
|
return false;
|
|
}
|
|
if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) {
|
|
*error_msg = StringPrintf("Failed execv(%s) because non-0 exit status",
|
|
command_line.c_str());
|
|
return false;
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
} // namespace installd
|
|
} // namespace android
|