1 files changed, 73 insertions, 0 deletions
diff --git a/lib/file-util.c b/lib/file-util.c
new file mode 100644
index 0000000..a45c946
--- /dev/null
+++ b/lib/file-util.c
@@ -0,0 +1,73 @@
+/**
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * @file	file-util.c
+ * @brief	EINTR safe file functions
+ */
+#include "file-util.h"
+
+#include <stdint.h>
+#include <unistd.h>
+#include <errno.h>
+
+/**
+ * INTR safe read
+ * Interface spec is similar to read.
+ */
+ssize_t safe_read(int fd, void *buf, size_t count)
+{
+	ssize_t size = 0,ressize = 0;
+	size_t reqsize = 0;
+	uint8_t *pbuf = NULL;
+
+	pbuf = (uint8_t*)buf;
+	reqsize = count;
+
+	do {
+		size = read(fd, pbuf, (reqsize - ressize));
+		if (size < 0) {
+			if (errno == EINTR) {
+				continue;
+			} else {
+				ressize = size;
+				break;
+			}
+		}
+
+		pbuf += size;
+		ressize += size;
+	} while((ressize < reqsize) && (size != 0));
+
+	return ressize;
+}
+
+/**
+ * INTR safe write
+ * Interface spec is similar to read.
+ */
+ssize_t safe_write(int fd, void *buf, size_t count)
+{
+	ssize_t size = 0,ressize = 0;
+	size_t reqsize = 0;
+	uint8_t *pbuf = NULL;
+
+	pbuf = (uint8_t*)buf;
+	reqsize = count;
+
+	do {
+		size = write(fd, pbuf, (reqsize - ressize));
+		if (size < 0) {
+			if (errno == EINTR) {
+				continue;
+			} else {
+				ressize = size;
+				break;
+			}
+		}
+
+		pbuf += size;
+		ressize += size;
+	} while((ressize < reqsize) && (size != 0));
+
+	return ressize;
+}