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SystemMonitor: Add Command column to ProcessModel

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This column shows full command line of a process, or empty line if an
error occures when reading it. The command is not escaped for now.
This commit is contained in:
Maciej 2022-10-29 21:49:51 +02:00 • committed by Sam Atkins
parent e4db71c88b
commit f4a5cd63bb
2 changed files with 30 additions and 0 deletions
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27
Userland/Applications/SystemMonitor/ProcessModel.cpp
View file

@ -12,6 +12,7 @@
#include <AK/NumberFormat.h>
#include <LibCore/File.h>
#include <LibCore/ProcessStatisticsReader.h>
#include <LibCore/Stream.h>
#include <LibGUI/FileIconProvider.h>
#include <LibGUI/Icon.h>
#include <LibGUI/ModelIndex.h>
@ -133,6 +134,8 @@ String ProcessModel::column_name(int column) const
return "Pledge";
case Column::Veil:
return "Veil";
case Column::Command:
return "Command";
default:
VERIFY_NOT_REACHED();
}
@ -150,6 +153,7 @@ GUI::Variant ProcessModel::data(GUI::ModelIndex const& index, GUI::ModelRole rol
case Column::User:
case Column::Pledge:
case Column::Veil:
case Column::Command:
return Gfx::TextAlignment::CenterLeft;
case Column::PID:
case Column::TID:
@ -221,6 +225,8 @@ GUI::Variant ProcessModel::data(GUI::ModelIndex const& index, GUI::ModelRole rol
return thread.current_state.cpu;
case Column::Name:
return thread.current_state.name;
case Column::Command:
return thread.current_state.command;
case Column::Syscalls:
return thread.current_state.syscall_count;
case Column::InodeFaults:
@ -289,6 +295,8 @@ GUI::Variant ProcessModel::data(GUI::ModelIndex const& index, GUI::ModelRole rol
if (thread.current_state.kernel)
return String::formatted("{} (*)", thread.current_state.name);
return thread.current_state.name;
case Column::Command:
return thread.current_state.command;
case Column::Syscalls:
return thread.current_state.syscall_count;
case Column::InodeFaults:
@ -400,6 +408,24 @@ Vector<GUI::ModelIndex> ProcessModel::matches(StringView searching, unsigned fla
return found_indices;
}
static ErrorOr<String> try_read_command_line(pid_t pid)
{
auto file = TRY(Core::Stream::File::open(String::formatted("/proc/{}/cmdline", pid), Core::Stream::OpenMode::Read));
auto data = TRY(file->read_all());
auto json = TRY(JsonValue::from_string(StringView { data.bytes() }));
auto array = json.as_array().values();
return String::join(" "sv, array);
}
static String read_command_line(pid_t pid)
{
auto string_or_error = try_read_command_line(pid);
if (string_or_error.is_error()) {
return "";
}
return string_or_error.release_value();
}
void ProcessModel::update()
{
auto previous_tid_count = m_threads.size();
@ -442,6 +468,7 @@ void ProcessModel::update()
state.kernel = process.kernel;
state.executable = process.executable;
state.name = thread.name;
state.command = read_command_line(process.pid);
state.uid = process.uid;
state.state = thread.state;
state.user = process.username;