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/*
* Copyright (c) 2018-2021, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/QuickSort.h>
#include <LibCore/ArgsParser.h>
#include <LibCore/ProcessStatisticsReader.h>
#include <stdio.h>
#include <unistd.h>
int main(int argc, char** argv)
{
if (pledge("stdio rpath tty", nullptr) < 0) {
perror("pledge");
return 1;
}
String this_tty = ttyname(STDIN_FILENO);
if (pledge("stdio rpath", nullptr) < 0) {
perror("pledge");
return 1;
}
if (unveil("/proc/all", "r") < 0) {
perror("unveil");
return 1;
}
if (unveil("/etc/passwd", "r") < 0) {
perror("unveil");
return 1;
}
unveil(nullptr, nullptr);
enum class Alignment {
Left,
Right,
};
struct Column {
String title;
Alignment alignment { Alignment::Left };
int width { 0 };
String buffer;
};
bool every_process_flag = false;
bool full_format_flag = false;
Core::ArgsParser args_parser;
args_parser.add_option(every_process_flag, "Show every process", nullptr, 'e');
args_parser.add_option(full_format_flag, "Full format", nullptr, 'f');
args_parser.parse(argc, argv);
Vector<Column> columns;
int uid_column = -1;
int pid_column = -1;
int ppid_column = -1;
int state_column = -1;
int tty_column = -1;
int cmd_column = -1;
auto add_column = [&](auto title, auto alignment) {
columns.append({ title, alignment, 0, {} });
return columns.size() - 1;
};
if (full_format_flag) {
uid_column = add_column("UID", Alignment::Left);
pid_column = add_column("PID", Alignment::Right);
ppid_column = add_column("PPID", Alignment::Right);
state_column = add_column("STATE", Alignment::Left);
tty_column = add_column("TTY", Alignment::Left);
cmd_column = add_column("CMD", Alignment::Left);
} else {
pid_column = add_column("PID", Alignment::Right);
tty_column = add_column("TTY", Alignment::Left);
cmd_column = add_column("CMD", Alignment::Left);
}
auto processes = Core::ProcessStatisticsReader::get_all();
if (!processes.has_value())
return 1;
quick_sort(processes.value(), [](auto& a, auto& b) { return a.pid < b.pid; });
Vector<Vector<String>> rows;
rows.ensure_capacity(1 + processes.value().size());
Vector<String> header;
header.ensure_capacity(columns.size());
for (auto& column : columns)
header.append(column.title);
rows.append(move(header));
for (auto const& process : processes.value()) {
auto tty = process.tty;
if (!every_process_flag && tty != this_tty)
continue;
if (tty.starts_with("/dev/"))
tty = tty.characters() + 5;
else
tty = "n/a";
auto* state = process.threads.is_empty() ? "Zombie" : process.threads.first().state.characters();
Vector<String> row;
row.resize(columns.size());
if (uid_column != -1)
row[uid_column] = process.username;
if (pid_column != -1)
row[pid_column] = String::number(process.pid);
if (ppid_column != -1)
row[ppid_column] = String::number(process.ppid);
if (tty_column != -1)
row[tty_column] = tty;
if (state_column != -1)
row[state_column] = state;
if (cmd_column != -1)
row[cmd_column] = process.name;
rows.append(move(row));
}
for (size_t i = 0; i < columns.size(); i++) {
auto& column = columns[i];
for (auto& row : rows)
column.width = max(column.width, static_cast<int>(row[i].length()));
}
for (auto& row : rows) {
for (size_t i = 0; i < columns.size(); i++) {
auto& column = columns[i];
auto& cell_text = row[i];
if (!column.width) {
out("{}", cell_text);
continue;
}
if (column.alignment == Alignment::Right)
out("{1:>{0}} ", column.width, cell_text);
else
out("{1:{0}} ", column.width, cell_text);
if (i != columns.size() - 1)
out(" ");
}
outln();
}
return 0;
}
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