Function format_users

src/os/linux/users.cpp:156–199

} // anonymous

ByteBuf format_users(const Engine& eng) {
    // Live-task UIDs first — they drive which /etc/passwd copy is "correct".
    std::map<u32, std::size_t> proc_count_by_uid;
    for (const auto& p : eng.processes()) ++proc_count_by_uid[p.uid];

    PasswdSource src = select_passwd(eng, proc_count_by_uid);
    const auto& by_uid = src.by_uid;

    std::string out;
    out.reserve(8 * 1024);
    out += fmt::format(
        "# /sys/users.txt — UID → name table\n"
        "# /etc/passwd source: {}\n"
        "# {} entries parsed; {} unique UIDs seen across {} live tasks.\n"
        "#\n",
        src.origin, by_uid.size(), proc_count_by_uid.size(), eng.processes().size());

    // Union of UIDs from passwd ∪ live tasks.
    std::set<u32> all_uids;
    for (auto& [uid, _] : by_uid)            all_uids.insert(uid);
    for (auto& [uid, _] : proc_count_by_uid) all_uids.insert(uid);

    out += fmt::format("{:>6}  {:<16}  {:>5}  {:>5}  {:<24}  {}\n",
                       "UID", "NAME", "PROCS", "GID", "HOME", "SHELL");
    out += std::string(96, '-') + "\n";
    for (u32 uid : all_uids) {
        std::size_t nproc = proc_count_by_uid.count(uid) ? proc_count_by_uid.at(uid) : 0;
        auto it = by_uid.find(uid);
        if (it != by_uid.end()) {
            const auto& e = it->second;
            out += fmt::format("{:>6}  {:<16}  {:>5}  {:>5}  {:<24}  {}\n",
                               uid, e.name.substr(0, 16), nproc, e.gid,
                               e.home.substr(0, 24), e.shell);
        } else {
            // UID present in live tasks but not in /etc/passwd (LDAP /
            // SSSD / nss-resolve / system uid not in the file / container
            // uid_map remap).
            out += fmt::format("{:>6}  {:<16}  {:>5}  {:>5}  {:<24}  {}\n",
                               uid, "(unresolved)", nproc, "?",
                               "?", "(not in /etc/passwd)");
        }
    }
    return ByteBuf(out.begin(), out.end());
}

} // namespace lmpfs::linux