From 2b9172c7d4f8f3f773946e1aab4f9376f50b4cf7 Mon Sep 17 00:00:00 2001
From: rsc <devnull@localhost>
Date: Mon, 27 Dec 2004 00:36:40 +0000
Subject: add readn to avoid need for plan9port libc

---
 src/cmd/mk/archive.c | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

(limited to 'src/cmd/mk/archive.c')

diff --git a/src/cmd/mk/archive.c b/src/cmd/mk/archive.c
index 8edfdddc..fcfee03b 100644
--- a/src/cmd/mk/archive.c
+++ b/src/cmd/mk/archive.c
@@ -22,6 +22,25 @@ static int dolong = 1;
 static void atimes(char *);
 static char *split(char*, char**);
 
+long
+readn(int f, void *av, long n)
+{
+	char *a;
+	long m, t;
+
+	a = av;
+	t = 0;
+	while(t < n){
+		m = read(f, a+t, n-t);
+		if(m <= 0){
+			if(t == 0)
+				return m;
+			break;
+		}
+		t += m;
+	}
+	return t;
+}
 long
 atimeof(int force, char *name)
 {
-- 
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