Import sources from 2011-03-30 iso image

1 files changed, 20 insertions, 0 deletions

diff --git a/sys/src/cmd/auth/lib/readn.c b/sys/src/cmd/auth/lib/readn.c
new file mode 100755
index 000000000..6f9324958
--- /dev/null
+++ b/sys/src/cmd/auth/lib/readn.c
@@ -0,0 +1,20 @@
+#include <u.h>
+#include <libc.h>
+#include <bio.h>
+#include "authcmdlib.h"
+
+/*
+ *  read exactly len bytes
+ */
+int
+readn(int fd, char *buf, int len)
+{
+	int m, n;
+
+	for(n = 0; n < len; n += m){
+		m = read(fd, buf+n, len-n);
+		if(m <= 0)
+			return -1;
+	}
+	return n;
+}