# HG changeset patch
# User mmj
# Date 1115058015 -36000
# Node ID 1a2f00c5b2e934e2eaf5123d65985c447500d27b
# Parent  cecbb0d77eb2cd6cbb6aeb8ddb93600c59d124c8
forgot the readn.c

diff -r cecbb0d77eb2 -r 1a2f00c5b2e9 src/readn.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/readn.c	Tue May 03 04:20:15 2005 +1000
@@ -0,0 +1,52 @@
+/* Copyright (C) 2005 Mads Martin Joergensen <mmj at mmj.dk>
+ *
+ * $Id$
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+
+#include <unistd.h>
+#include <errno.h>
+
+#include "wrappers.h"
+
+/* classic read wrapper from Stevens */
+ssize_t readn(int fd, void *vptr, size_t n)
+{
+	size_t  nleft;
+	ssize_t nread;
+	char    *ptr;
+
+	ptr = vptr;
+	nleft = n;
+	while(nleft > 0) {
+		if((nread = read(fd, ptr, nleft)) < 0) {
+			if(errno == EINTR)
+				nread = 0;      /* and call read() again */
+			else
+				return -1; /* Caller can check errno */
+		} else if (nread == 0)
+			break;              /* EOF */
+
+		nleft -= nread;
+		ptr += nread;
+	}
+	return n - nleft;         /* return >= 0 */
+}
+