Merge commit '86cc97e55fe346502462284d2e636a2b3708163e' as 'Sources/OpenVPN3'

Sources/OpenVPN3/openvpn/common/modstat.hpp

@@ -0,0 +1,77 @@
+//    OpenVPN -- An application to securely tunnel IP networks
+//               over a single port, with support for SSL/TLS-based
+//               session authentication and key exchange,
+//               packet encryption, packet authentication, and
+//               packet compression.
+//
+//    Copyright (C) 2012-2017 OpenVPN Inc.
+//
+//    This program is free software: you can redistribute it and/or modify
+//    it under the terms of the GNU Affero General Public License Version 3
+//    as published by the Free Software Foundation.
+//
+//    This program is distributed in the hope that it will be useful,
+//    but WITHOUT ANY WARRANTY; without even the implied warranty of
+//    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//    GNU Affero General Public License for more details.
+//
+//    You should have received a copy of the GNU Affero General Public License
+//    along with this program in the COPYING file.
+//    If not, see <http://www.gnu.org/licenses/>.
+
+#pragma once
+
+#include <fcntl.h>         // Definition of AT_* constants */
+#include <sys/stat.h>
+#include <cstdint>         // for std::uint64_t
+#include <cerrno>
+
+#include <string>
+
+#include <openvpn/common/platform.hpp>
+
+namespace openvpn {
+
+#if defined(OPENVPN_PLATFORM_LINUX)
+
+  inline int update_file_mod_time_nanoseconds(const std::string& filename,
+					      const std::uint64_t nanoseconds_since_epooch)
+  {
+    struct timespec times[2];
+    times[0].tv_sec = nanoseconds_since_epooch / std::uint64_t(1000000000);
+    times[0].tv_nsec = nanoseconds_since_epooch % std::uint64_t(1000000000);
+    times[1] = times[0];
+    if (::utimensat(AT_FDCWD, filename.c_str(), times, 0) == -1)
+      return errno;
+    return 0;
+  }
+
+  inline int update_file_mod_time_nanoseconds(const int fd,
+					      const std::uint64_t nanoseconds_since_epooch)
+  {
+    struct timespec times[2];
+    times[0].tv_sec = nanoseconds_since_epooch / std::uint64_t(1000000000);
+    times[0].tv_nsec = nanoseconds_since_epooch % std::uint64_t(1000000000);
+    times[1] = times[0];
+    if (::futimens(fd, times) == -1)
+      return errno;
+    return 0;
+  }
+
+#else
+
+  inline int update_file_mod_time_nanoseconds(const std::string& filename,
+					      const std::uint64_t nanoseconds_since_epooch)
+  {
+    return 0;
+  }
+
+  inline int update_file_mod_time_nanoseconds(const int fd,
+					      const std::uint64_t nanoseconds_since_epooch)
+  {
+    return 0;
+  }
+
+#endif
+
+}