# HG changeset patch
# User Rob Landley <rob@landley.net>
# Date 1325098872 21600
# Node ID 7a5b70965e0e94474ecf89c6a102cbb46e855853
# Parent  a4dcbad4f92a3a1aeacf77be0885392a959626d7
Bugfix (spotted by Nathan McSween): xread can't detect <0 if the return type is stored in an unsigned variable.

diff -r a4dcbad4f92a -r 7a5b70965e0e lib/lib.c
--- a/lib/lib.c	Mon Dec 12 23:49:55 2011 -0600
+++ b/lib/lib.c	Wed Dec 28 13:01:12 2011 -0600
@@ -246,10 +246,10 @@
 // Die if there's an error other than EOF.
 size_t xread(int fd, void *buf, size_t len)
 {
-	len = read(fd, buf, len);
-	if (len < 0) perror_exit("xread");
+	ssize_t ret = read(fd, buf, len);
+	if (ret < 0) perror_exit("xread");
 
-	return len;
+	return ret;
 }
 
 void xreadall(int fd, void *buf, size_t len)