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+/* Provide a more complete sys/file.h.
+
+ Copyright (C) 2007-2022 Free Software Foundation, Inc.
+
+ This file is free software: you can redistribute it and/or modify
+ it under the terms of the GNU Lesser General Public License as
+ published by the Free Software Foundation; either version 2.1 of the
+ License, or (at your option) any later version.
+
+ This file 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 Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public License
+ along with this program. If not, see <https://www.gnu.org/licenses/>. */
+
+/* Written by Richard W.M. Jones. */
+
+#ifndef _@GUARD_PREFIX@_SYS_FILE_H
+
+#if __GNUC__ >= 3
+@PRAGMA_SYSTEM_HEADER@
+#endif
+@PRAGMA_COLUMNS@
+
+/* The include_next requires a split double-inclusion guard. */
+#if @HAVE_SYS_FILE_H@
+# @INCLUDE_NEXT@ @NEXT_SYS_FILE_H@
+#endif
+
+#ifndef _@GUARD_PREFIX@_SYS_FILE_H
+#define _@GUARD_PREFIX@_SYS_FILE_H
+
+#ifndef LOCK_SH
+/* Operations for the 'flock' call (same as Linux kernel constants). */
+# define LOCK_SH 1 /* Shared lock. */
+# define LOCK_EX 2 /* Exclusive lock. */
+# define LOCK_UN 8 /* Unlock. */
+
+/* Can be OR'd in to one of the above. */
+# define LOCK_NB 4 /* Don't block when locking. */
+#endif
+
+/* The definition of _GL_WARN_ON_USE is copied here. */
+
+#if @GNULIB_FLOCK@
+/* Apply or remove advisory locks on an open file.
+ Return 0 if successful, otherwise -1 and errno set. */
+# if !@HAVE_FLOCK@
+extern int flock (int fd, int operation);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef flock
+# if HAVE_RAW_DECL_FLOCK
+_GL_WARN_ON_USE (flock, "flock is unportable - "
+ "use gnulib module flock for portability");
+# endif
+#endif
+
+
+#endif /* _@GUARD_PREFIX@_SYS_FILE_H */
+#endif /* _@GUARD_PREFIX@_SYS_FILE_H */