Implement version ioctl and expand comments

1 files changed, 25 insertions, 1 deletions

diff --git a/src/drm.cpp b/src/drm.cpp
index 66fe147..77d326d 100644
--- a/src/drm.cpp
+++ b/src/drm.cpp
@@ -5,9 +5,9 @@
 #include "drm++/helper/types.hpp"
 
 #include <stdexcept>
+#include <string>
 
 #include <drm.h>
-#include <string>
 #include <unistd.h>
 
 using namespace drm;
@@ -16,6 +16,30 @@ Device::Device(int fd) : m_fd(fd) {
     if (this->m_fd < 0) {
         throw std::invalid_argument("invalid file descriptor");
     }
+
+    drm_version args{
+        .version_major = 0,
+    };
+    ioctl::perform(this->m_fd, DRM_IOCTL_VERSION, args);
+
+    this->m_version = {
+        args.version_major,
+        args.version_minor,
+        args.version_patchlevel
+    };
+    this->m_name.resize(args.name_len);
+    this->m_date.resize(args.date_len);
+    this->m_description.resize(args.desc_len);
+
+    args = {
+        .name_len = this->m_name.size(),
+        .name = this->m_name.data(),
+        .date_len = this->m_date.size(),
+        .date = this->m_date.data(),
+        .desc_len = this->m_description.size(),
+        .desc = this->m_description.data()
+    };
+    ioctl::perform(this->m_fd, DRM_IOCTL_VERSION, args);
 }
 
 void Device::setClientName(const std::string& name) const {