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Commit 781aa78e authored by Steve Muckle's avatar Steve Muckle
Browse files

libmodprobe: add GetAllDependencies 

Add a method to retrieve the dependencies (both hard and soft) of a
module.

Change-Id: Ie44ceb3e36856bb1a3e68c5d3c0d55a38deb0ef9
parent 012cfa19

libmodprobe/include/modprobe/modprobe.h

+3 −0
Original line number Diff line number Diff line
@@ -30,6 +30,9 @@ class Modprobe { 
                         const std::string& parameters = "");

    bool Remove(const std::string& module_name);

    std::vector<std::string> ListModules(const std::string& pattern);

    bool GetAllDependencies(const std::string& module, std::vector<std::string>* pre_dependencies,

                            std::vector<std::string>* dependencies,

                            std::vector<std::string>* post_dependencies);

    void EnableBlacklist(bool enable);



  private:

libmodprobe/libmodprobe.cpp

+33 −0
Original line number Diff line number Diff line
@@ -376,3 +376,36 @@ std::vector<std::string> Modprobe::ListModules(const std::string& pattern) { 
    }

    return rv;

}



bool Modprobe::GetAllDependencies(const std::string& module,

                                  std::vector<std::string>* pre_dependencies,

                                  std::vector<std::string>* dependencies,

                                  std::vector<std::string>* post_dependencies) {

    std::string canonical_name = MakeCanonical(module);

    if (pre_dependencies) {

        pre_dependencies->clear();

        for (const auto& [it_module, it_softdep] : module_pre_softdep_) {

            if (canonical_name == it_module) {

                pre_dependencies->emplace_back(it_softdep);

            }

        }

    }

    if (dependencies) {

        dependencies->clear();

        auto hard_deps = GetDependencies(canonical_name);

        if (hard_deps.empty()) {

            return false;

        }

        for (auto dep = hard_deps.rbegin(); dep != hard_deps.rend(); dep++) {

            dependencies->emplace_back(*dep);

        }

    }

    if (post_dependencies) {

        for (const auto& [it_module, it_softdep] : module_post_softdep_) {

            if (canonical_name == it_module) {

                post_dependencies->emplace_back(it_softdep);

            }

        }

    }

    return true;

}