mirror of
https://github.com/LadybirdBrowser/ladybird.git
synced 2024-11-22 15:40:19 +00:00
117 lines
3.7 KiB
C++
117 lines
3.7 KiB
C++
/*
|
|
* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions are met:
|
|
*
|
|
* 1. Redistributions of source code must retain the above copyright notice, this
|
|
* list of conditions and the following disclaimer.
|
|
*
|
|
* 2. Redistributions in binary form must reproduce the above copyright notice,
|
|
* this list of conditions and the following disclaimer in the documentation
|
|
* and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
|
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
|
|
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
|
|
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
|
|
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
|
|
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
|
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#include <AK/JsonObject.h>
|
|
#include <AK/JsonValue.h>
|
|
#include <LibCore/ArgsParser.h>
|
|
#include <LibCore/DateTime.h>
|
|
#include <LibCore/File.h>
|
|
|
|
int main(int argc, char** argv)
|
|
{
|
|
if (pledge("stdio wpath cpath", nullptr) < 0) {
|
|
perror("pledge");
|
|
return 1;
|
|
}
|
|
|
|
if (unveil("/var/run/utmp", "rwc") < 0) {
|
|
perror("unveil");
|
|
return 1;
|
|
}
|
|
|
|
unveil(nullptr, nullptr);
|
|
|
|
pid_t pid = 0;
|
|
bool flag_create = false;
|
|
bool flag_delete = false;
|
|
const char* tty_name = nullptr;
|
|
const char* from = nullptr;
|
|
|
|
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(argc, argv);
|
|
|
|
if (flag_create && flag_delete) {
|
|
warn() << "-c and -d are mutually exclusive";
|
|
return 1;
|
|
}
|
|
|
|
dbg() << "Updating utmp from UID=" << getuid() << " GID=" << getgid() << " EGID=" << getegid() << " PID=" << pid;
|
|
|
|
auto file_or_error = Core::File::open("/var/run/utmp", Core::IODevice::ReadWrite);
|
|
if (file_or_error.is_error()) {
|
|
dbg() << "Error: " << file_or_error.error();
|
|
return 1;
|
|
}
|
|
|
|
auto& file = *file_or_error.value();
|
|
|
|
auto file_contents = file.read_all();
|
|
auto previous_json = JsonValue::from_string(file_contents);
|
|
|
|
JsonObject json;
|
|
|
|
if (!previous_json.has_value() || !previous_json.value().is_object()) {
|
|
dbg() << "Error: Could not parse JSON";
|
|
} else {
|
|
json = previous_json.value().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 {
|
|
ASSERT(flag_delete);
|
|
dbg() << "Removing " << tty_name << " from utmp";
|
|
json.remove(tty_name);
|
|
}
|
|
|
|
if (!file.seek(0)) {
|
|
dbg() << "Seek failed";
|
|
return 1;
|
|
}
|
|
|
|
if (!file.truncate(0)) {
|
|
dbg() << "Truncation failed";
|
|
return 1;
|
|
}
|
|
|
|
if (!file.write(json.to_string())) {
|
|
dbg() << "Write failed";
|
|
return 1;
|
|
}
|
|
|
|
return 0;
|
|
}
|