output process info linux

README.md

• https://mirkokiefer.com/cmake-by-example-f95eb47d45b1
• https://gitlab.com/procps-ng/procps/-/wikis/oldapi

finding libs whereis libjpeg or ldconfig -p | grep library or locate libjpeg

Dependencies

Dependencies from APT:

sudo apt install libprocps-dev

Other dependencies use vcpkg.

• nlohmann-json
• cpr

The following CMAKE command flag is needed to tell CMAKE to check for vcpkg libraries. In Jetbrains products, you can set this in File > Settings > Build, Execution, Deployment > CMake. Add the following verbatim, to CMAKE Options.

-DCMAKE_TOOLCHAIN_FILE=/opt/vcpkg/scripts/buildsystems/vcpkg.cmake

CMakeLists.txt

cmake_minimum_required(VERSION 3.16)
project(process_list)
set(CMAKE_CXX_STANDARD 14)

set(CMAKE_RUNTIME_OUTPUT_DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}/bin")
file(GLOB_RECURSE fileCollection "src/*.cpp")
add_executable(${PROJECT_NAME} ${fileCollection})

find_package(nlohmann_json CONFIG REQUIRED)
target_link_libraries(${PROJECT_NAME}
        PRIVATE nlohmann_json nlohmann_json::nlohmann_json
        procps
)

main.cpp

#include <iostream>
#include <cstring>
#include <proc/readproc.h>

using std::cout;

int main()
{
    PROCTAB* proc = openproc(PROC_FILLMEM | PROC_FILLSTAT | PROC_FILLSTATUS);

    proc_t proc_info;
    memset(&proc_info, 0, sizeof(proc_info));
    cout << "Program\tPID\tPPID\tMEM\tutime\tstime\n";
    while (readproc(proc, &proc_info) != nullptr) {
        cout << proc_info.cmd << "\t" << proc_info.tid;
        cout << proc_info.ppid << "\t" << proc_info.resident;
        cout << proc_info.euid << "\t" << proc_info.stime << "\n";
    }

    closeproc(proc);

    return 0;
}