mirror of
https://github.com/RGBCube/serenity
synced 2025-10-31 08:12:43 +00:00
105 lines
2.8 KiB
C++
105 lines
2.8 KiB
C++
/*
|
|
* Copyright (c) 2020, Itamar S. <itamar8910@gmail.com>
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*/
|
|
|
|
#include "Command.h"
|
|
#include <AK/ByteBuffer.h>
|
|
#include <AK/Format.h>
|
|
#include <AK/ScopeGuard.h>
|
|
#include <LibCore/File.h>
|
|
#include <fcntl.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <sys/wait.h>
|
|
#include <unistd.h>
|
|
|
|
namespace Core {
|
|
|
|
// Only supported in serenity mode because we use `posix_spawn_file_actions_addchdir`
|
|
#ifdef __serenity__
|
|
|
|
String command(const String& command_string, Optional<LexicalPath> chdir)
|
|
{
|
|
auto parts = command_string.split(' ');
|
|
if (parts.is_empty())
|
|
return {};
|
|
auto program = parts[0];
|
|
parts.remove(0);
|
|
return command(program, parts, chdir);
|
|
}
|
|
|
|
String command(const String& program, const Vector<String>& arguments, Optional<LexicalPath> chdir)
|
|
{
|
|
int stdout_pipe[2] = {};
|
|
int stderr_pipe[2] = {};
|
|
if (pipe2(stdout_pipe, O_CLOEXEC)) {
|
|
perror("pipe2");
|
|
VERIFY_NOT_REACHED();
|
|
}
|
|
if (pipe2(stderr_pipe, O_CLOEXEC)) {
|
|
perror("pipe2");
|
|
VERIFY_NOT_REACHED();
|
|
}
|
|
|
|
auto close_pipes = ScopeGuard([stderr_pipe, stdout_pipe] {
|
|
// The write-ends of these pipes are closed manually
|
|
close(stdout_pipe[0]);
|
|
close(stderr_pipe[0]);
|
|
});
|
|
|
|
Vector<const char*> parts = { program.characters() };
|
|
for (const auto& part : arguments) {
|
|
parts.append(part.characters());
|
|
}
|
|
parts.append(nullptr);
|
|
|
|
const char** argv = parts.data();
|
|
|
|
posix_spawn_file_actions_t action;
|
|
posix_spawn_file_actions_init(&action);
|
|
if (chdir.has_value()) {
|
|
posix_spawn_file_actions_addchdir(&action, chdir.value().string().characters());
|
|
}
|
|
posix_spawn_file_actions_adddup2(&action, stdout_pipe[1], STDOUT_FILENO);
|
|
posix_spawn_file_actions_adddup2(&action, stderr_pipe[1], STDERR_FILENO);
|
|
|
|
pid_t pid;
|
|
if ((errno = posix_spawnp(&pid, program.characters(), &action, nullptr, const_cast<char**>(argv), environ))) {
|
|
perror("posix_spawn");
|
|
VERIFY_NOT_REACHED();
|
|
}
|
|
int wstatus;
|
|
waitpid(pid, &wstatus, 0);
|
|
posix_spawn_file_actions_destroy(&action);
|
|
|
|
// close the write-ends so reading wouldn't block
|
|
close(stdout_pipe[1]);
|
|
close(stderr_pipe[1]);
|
|
|
|
auto read_all_from_pipe = [](int pipe[2]) {
|
|
auto result_file = Core::File::construct();
|
|
if (!result_file->open(pipe[0], Core::OpenMode::ReadOnly, Core::File::ShouldCloseFileDescriptor::Yes)) {
|
|
perror("open");
|
|
VERIFY_NOT_REACHED();
|
|
}
|
|
return String::copy(result_file->read_all());
|
|
};
|
|
|
|
if (WEXITSTATUS(wstatus) != 0) {
|
|
# ifdef DBG_FAILED_COMMANDS
|
|
dbgln("command failed. stderr: {}", read_all_from_pipe(stderr_pipe));
|
|
# endif
|
|
return {};
|
|
}
|
|
|
|
auto result = read_all_from_pipe(stdout_pipe);
|
|
if (result.is_null())
|
|
return "";
|
|
return result;
|
|
}
|
|
|
|
#endif
|
|
|
|
}
|