From e5888a1ffdae813d7575f5fb02275c6bb07e5199 Mon Sep 17 00:00:00 2001
From: Taru Karttunen <taruti@taruti.net>
Date: Wed, 30 Mar 2011 15:46:40 +0300
Subject: Import sources from 2011-03-30 iso image

---
 sys/src/ape/lib/bsd/writev.c | 62 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 62 insertions(+)
 create mode 100755 sys/src/ape/lib/bsd/writev.c

(limited to 'sys/src/ape/lib/bsd/writev.c')

diff --git a/sys/src/ape/lib/bsd/writev.c b/sys/src/ape/lib/bsd/writev.c
new file mode 100755
index 000000000..fbb36b692
--- /dev/null
+++ b/sys/src/ape/lib/bsd/writev.c
@@ -0,0 +1,62 @@
+#include <sys/types.h>
+#include <unistd.h>
+#include <string.h>
+
+/* bsd extensions */
+#include <sys/uio.h>
+#include <sys/socket.h>
+
+#include "priv.h"
+
+int
+writev(int fd, struct iovec *v, int ent)
+{
+	int i, n, written;
+	char *t, *e, *f;
+	char buf[10*1024];
+
+	written = n = 0;
+	t = buf;
+	e = buf+sizeof(buf);
+	for(;ent ; v++, ent--){
+		n = v->iov_len;
+		f = v->iov_base;
+		while(n > 0){
+			i = e-t;
+			if(n < i){
+				memmove(t, f, n);
+				t += n;
+				break;
+			}
+			memmove(t, f, i);
+			n -= i;
+			f += i;
+			i = write(fd, buf, sizeof(buf));
+			if(i < 0){
+				if(written > 0){
+					return written;
+				}else{
+					_syserrno();
+					return -1;
+				}
+			}
+			written += i;
+			if(i != sizeof(buf)) {
+				return written;
+			}
+			t = buf;
+		}
+	}
+	i = t - buf;
+	if(i > 0){
+		n = write(fd, buf, i);
+		if(n < 0){
+			if(written == 0){
+				_syserrno();
+				return -1;
+			}
+		} else
+			written += n;
+	}
+	return written;
+}
-- 
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