1 files changed, 23 insertions, 0 deletions
diff --git a/src/pread.c b/src/pread.c
new file mode 100644
index 0000000..dfaad3b
--- /dev/null
+++ b/src/pread.c
@@ -0,0 +1,23 @@
+#include "file.h"
+#ifndef lint
+FILE_RCSID("@(#)$File: pread.c,v 1.5 2022/09/24 20:30:13 christos Exp $")
+#endif  /* lint */
+#include <fcntl.h>
+#include <unistd.h>
+
+ssize_t
+pread(int fd, void *buf, size_t len, off_t off) {
+	off_t old;
+	ssize_t rv;
+
+	if ((old = lseek(fd, off, SEEK_SET)) == -1)
+		return -1;
+
+	if ((rv = read(fd, buf, len)) == -1)
+		return -1;
+
+	if (lseek(fd, old, SEEK_SET) == -1)
+		return -1;
+
+	return rv;
+}