Implement utimens

1 files changed, 13 insertions, 0 deletions

diff --git a/src/posix_extras.cc b/src/posix_extras.cc
index f8274fb..7529251 100644
--- a/src/posix_extras.cc
+++ b/src/posix_extras.cc
@@ -14,6 +14,7 @@
 
 #include "posix_extras.h"
 
+#include <array>
 #include <cerrno>
 #include <experimental/optional>
 #include <stdexcept>
@@ -110,6 +111,18 @@ void File::UnlinkAt(const char* const path) const {
   }
 }
 
+void File::UTimeNs(const char* const path, const timespec& access,
+                   const timespec& modification) const {
+  if (path[0] == '/') {
+    throw std::invalid_argument("absolute path");
+  }
+
+  std::array<const timespec, 2> times{{access, modification}};
+  if (utimensat(fd_, path, times.data(), AT_SYMLINK_NOFOLLOW) == -1) {
+    throw SystemError();
+  }
+}
+
 int File::Duplicate() const {
   int result;
   if ((result = dup(fd_)) == -1) {