X-Git-Url: https://git.subgeniuskitty.com/unix-history/.git/blobdiff_plain/31cef89cb428866f787983e68246030321893df4..4b9ccde74dc34e450ed96bcd3d044f78cf393d8d:/usr/src/libc/stdio/ftell.c

diff --git a/usr/src/libc/stdio/ftell.c b/usr/src/libc/stdio/ftell.c
index b33252b8cd..e2226c8656 100644
--- a/usr/src/libc/stdio/ftell.c
+++ b/usr/src/libc/stdio/ftell.c
@@ -1,3 +1,4 @@
+/* @(#)ftell.c	4.2 (Berkeley) 3/9/81 */
 /*
  * Return file offset.
  * Coordinates with buffering.
@@ -17,9 +18,9 @@ FILE *iop;
 		iop->_cnt = 0;
 	if (iop->_flag&_IOREAD)
 		adjust = - iop->_cnt;
-	else if (iop->_flag&_IOWRT) {
+	else if (iop->_flag&(_IOWRT|_IORW)) {
 		adjust = 0;
-		if (iop->_base && (iop->_flag&_IONBF)==0)
+		if (iop->_flag&_IOWRT && iop->_base && (iop->_flag&_IONBF)==0)
 			adjust = iop->_ptr - iop->_base;
 	} else
 		return(-1);