Getting OS version numbers for Linux.

base/sys_info_posix.cc

Index: base/sys_info_posix.cc
diff --git a/base/sys_info_posix.cc b/base/sys_info_posix.cc
index f480055cc4b472304b51e1c8f5c9d6246b81cbce..c4c07d07da20ecff9e2b12bd676c8c00c8156190 100644
--- a/base/sys_info_posix.cc
+++ b/base/sys_info_posix.cc
@@ -183,6 +183,30 @@ std::string SysInfo::OperatingSystemVersion() {
 }
 #endif
 
+#if !defined(OS_MACOSX) && !defined(OS_ANDROID) && !defined(OS_CHROMEOS)
+// static
+void SysInfo::OperatingSystemVersionNumbers(int32_t* major_version,
+                                            int32_t* minor_version,
+                                            int32_t* bugfix_version) {
+  struct utsname info;
+  if (uname(&info) < 0) {
+    NOTREACHED();
+    *major_version = 0;
+    *minor_version = 0;
+    *bugfix_version = 0;
+    return;
+  }
+  int num_read = sscanf(info.release, "%d.%d.%d", major_version, minor_version,
+                        bugfix_version);
+  if (num_read < 1)
+    *major_version = 0;
+  if (num_read < 2)
+    *minor_version = 0;
+  if (num_read < 3)
+    *bugfix_version = 0;
+}
+#endif
+
 // static
 std::string SysInfo::OperatingSystemArchitecture() {
   struct utsname info;