1 files changed, 54 insertions, 0 deletions
diff --git a/lib/bsdutil/close_fd.h b/lib/bsdutil/close_fd.h
new file mode 100644
index 0000000..68ba6c9
--- /dev/null
+++ b/lib/bsdutil/close_fd.h
@@ -0,0 +1,54 @@
+#ifndef _PATH_DEV
+/*
+ * The tailing '/' in _PATH_DEV is there for compatibility with libc.
+ */
+# define _PATH_DEV"/dev/"
+#endif
+
+////////////////////////////////////////////////
+/// Cargo culted from util-linux include/c.h ///
+////////////////////////////////////////////////
+#include <err.h>
+
+/*
+ * Force a compilation error if condition is true, but also produce a
+ * result (of value 0 and type size_t), so the expression can be used
+ * e.g. in a structure initializer (or wherever else comma expressions
+ * aren't permitted).
+ */
+#define UL_BUILD_BUG_ON_ZERO(e) __extension__ (sizeof(struct { int:-!!(e); }))
+#define BUILD_BUG_ON_NULL(e) ((void *)sizeof(struct { int:-!!(e); }))
+
+#ifdef __GNUC__
+/* &a[0] degrades to a pointer: a different type from an array */
+# define __must_be_array(a) \
+	UL_BUILD_BUG_ON_ZERO(__builtin_types_compatible_p(__typeof__(a), __typeof__(&a[0])))
+
+# define ignore_result(x) __extension__ ({ \
+	__typeof__(x) __dummy __attribute__((__unused__)) = (x); (void) __dummy; \
+		})
+#else /* !__GNUC__ */
+# define __must_be_array(a)     0
+# define __attribute__(_arg_)
+# define ignore_result(x) ((void) (x))
+#endif /* !__GNUC__ */
+
+#ifndef ARRAY_SIZE
+# define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]) + __must_be_array(arr))
+#endif
+
+//////////////////////////////////////////////////////////
+/// Cargo culted from util-linux include/closestream.h ///
+//////////////////////////////////////////////////////////
+static inline int
+close_fd(int fd)
+{
+	const int fsync_fail = (fsync(fd) != 0);
+	const int close_fail = (close(fd) != 0);
+
+	if (fsync_fail || close_fail)
+		return EOF;
+	return 0;
+}
+
+