mirror of
https://github.com/LadybirdBrowser/ladybird.git
synced 2024-11-10 13:00:29 +03:00
ed4c2f2f8e
This generally seems like a better name, especially if we somehow also need a better name for "read the entire buffer, but not the entire file" somewhere down the line.
79 lines
2.3 KiB
C++
79 lines
2.3 KiB
C++
/*
|
|
* Copyright (c) 2020-2021, Andreas Kling <kling@serenityos.org>
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*/
|
|
|
|
#include <AK/Assertions.h>
|
|
#include <AK/ByteBuffer.h>
|
|
#include <AK/JsonObject.h>
|
|
#include <AK/JsonValue.h>
|
|
#include <LibCore/ArgsParser.h>
|
|
#include <LibCore/DateTime.h>
|
|
#include <LibCore/Stream.h>
|
|
#include <LibCore/System.h>
|
|
#include <LibMain/Main.h>
|
|
#include <unistd.h>
|
|
|
|
ErrorOr<int> serenity_main(Main::Arguments arguments)
|
|
{
|
|
TRY(Core::System::pledge("stdio wpath cpath"));
|
|
TRY(Core::System::unveil("/var/run/utmp", "rwc"));
|
|
TRY(Core::System::unveil(nullptr, nullptr));
|
|
|
|
pid_t pid = 0;
|
|
bool flag_create = false;
|
|
bool flag_delete = false;
|
|
StringView tty_name;
|
|
StringView from;
|
|
|
|
Core::ArgsParser args_parser;
|
|
args_parser.add_option(flag_create, "Create entry", "create", 'c');
|
|
args_parser.add_option(flag_delete, "Delete entry", "delete", 'd');
|
|
args_parser.add_option(pid, "PID", "PID", 'p', "PID");
|
|
args_parser.add_option(from, "From", "from", 'f', "From");
|
|
args_parser.add_positional_argument(tty_name, "TTY name", "tty");
|
|
args_parser.parse(arguments);
|
|
|
|
if (flag_create && flag_delete) {
|
|
warnln("-c and -d are mutually exclusive");
|
|
return 1;
|
|
}
|
|
|
|
dbgln("Updating utmp from UID={} GID={} EGID={} PID={}", getuid(), getgid(), getegid(), pid);
|
|
|
|
auto file = TRY(Core::Stream::File::open("/var/run/utmp"sv, Core::Stream::OpenMode::ReadWrite));
|
|
|
|
auto file_contents = TRY(file->read_until_eof());
|
|
auto previous_json = TRY(JsonValue::from_string(file_contents));
|
|
|
|
JsonObject json;
|
|
|
|
if (!file_contents.is_empty()) {
|
|
if (!previous_json.is_object()) {
|
|
dbgln("Error: Could not parse JSON");
|
|
} else {
|
|
json = previous_json.as_object();
|
|
}
|
|
}
|
|
|
|
if (flag_create) {
|
|
JsonObject entry;
|
|
entry.set("pid", pid);
|
|
entry.set("uid", getuid());
|
|
entry.set("from", from);
|
|
entry.set("login_at", time(nullptr));
|
|
json.set(tty_name, move(entry));
|
|
} else {
|
|
VERIFY(flag_delete);
|
|
dbgln("Removing {} from utmp", tty_name);
|
|
json.remove(tty_name);
|
|
}
|
|
|
|
TRY(file->seek(0, Core::Stream::SeekMode::SetPosition));
|
|
TRY(file->truncate(0));
|
|
TRY(file->write(json.to_deprecated_string().bytes()));
|
|
|
|
return 0;
|
|
}
|