1 files changed, 38 insertions, 0 deletions
diff --git a/lib/ccan/read_write_all/read_write_all.c b/lib/ccan/read_write_all/read_write_all.c
new file mode 100644
index 0000000000..c66d521598
--- /dev/null
+++ b/lib/ccan/read_write_all/read_write_all.c
@@ -0,0 +1,38 @@
+/* Licensed under LGPLv2+ - see LICENSE file for details */
+#include "read_write_all.h"
+#include <unistd.h>
+#include <errno.h>
+
+bool write_all(int fd, const void *data, size_t size)
+{
+	while (size) {
+		ssize_t done;
+
+		done = write(fd, data, size);
+		if (done < 0 && errno == EINTR)
+			continue;
+		if (done <= 0)
+			return false;
+		data = (const char *)data + done;
+		size -= done;
+	}
+
+	return true;
+}
+
+bool read_all(int fd, void *data, size_t size)
+{
+	while (size) {
+		ssize_t done;
+
+		done = read(fd, data, size);
+		if (done < 0 && errno == EINTR)
+			continue;
+		if (done <= 0)
+			return false;
+		data = (char *)data + done;
+		size -= done;
+	}
+
+	return true;
+}