commit c7dd165f67069848fd54d13432b0d755bac6d867
author Steve Muckle <smuckle@google.com> Wed Jul 31 15:55:00 2019 -0700
committer Steve Muckle <smuckle@google.com> Tue Aug 06 13:58:13 2019 -0700
tree 2a1c6ecbb68f2c4a085c12ac2d48762e7b85797d
parent d866ac00182e48c00b19b025e00fa8015c0bdb57

libmodprobe: add support to list modules

List the known modules with a name matching a given pattern.

Change-Id: I7f6bd1f09a688c66682f94c5837e61d7dc61c1f7

libmodprobe/include/modprobe/modprobe.h

diff --git a/libmodprobe/include/modprobe/modprobe.h b/libmodprobe/include/modprobe/modprobe.h
index 03fb0a3..913a787 100644
--- a/libmodprobe/include/modprobe/modprobe.h
+++ b/libmodprobe/include/modprobe/modprobe.h
@@ -29,6 +29,7 @@
     bool LoadWithAliases(const std::string& module_name, bool strict,
                          const std::string& parameters = "");
     bool Remove(const std::string& module_name);
+    std::vector<std::string> ListModules(const std::string& pattern);
     void EnableBlacklist(bool enable);
 
   private:

libmodprobe/libmodprobe.cpp

diff --git a/libmodprobe/libmodprobe.cpp b/libmodprobe/libmodprobe.cpp
index 354ec7b..0106242 100644
--- a/libmodprobe/libmodprobe.cpp
+++ b/libmodprobe/libmodprobe.cpp
@@ -363,3 +363,16 @@
     }
     return true;
 }
+
+std::vector<std::string> Modprobe::ListModules(const std::string& pattern) {
+    std::vector<std::string> rv;
+    for (const auto& [module, deps] : module_deps_) {
+        // Attempt to match both the canonical module name and the module filename.
+        if (!fnmatch(pattern.c_str(), module.c_str(), 0)) {
+            rv.emplace_back(module);
+        } else if (!fnmatch(pattern.c_str(), basename(deps[0].c_str()), 0)) {
+            rv.emplace_back(deps[0]);
+        }
+    }
+    return rv;
+}