Import sources from 2011-03-30 iso image

1 files changed, 42 insertions, 0 deletions

diff --git a/sys/src/libc/9sys/writev.c b/sys/src/libc/9sys/writev.c
new file mode 100755
index 000000000..e3692db27
--- /dev/null
+++ b/sys/src/libc/9sys/writev.c
@@ -0,0 +1,42 @@
+#include <u.h>
+#include <libc.h>
+
+static
+long
+iowritev(int fd, IOchunk *io, int nio, vlong offset)
+{
+	int i;
+	long tot;
+	char *buf, *p;
+
+	tot = 0;
+	for(i=0; i<nio; i++)
+		tot += io[i].len;
+	buf = malloc(tot);
+	if(buf == nil)
+		return -1;
+
+	p = buf;
+	for(i=0; i<nio; i++){
+		memmove(p, io->addr, io->len);
+		p += io->len;
+		io++;
+	}
+
+	tot = pwrite(fd, buf, tot, offset);
+
+	free(buf);
+	return tot;
+}
+
+long
+writev(int fd, IOchunk *io, int nio)
+{
+	return iowritev(fd, io, nio, -1LL);
+}
+
+long
+pwritev(int fd, IOchunk *io, int nio, vlong off)
+{
+	return iowritev(fd, io, nio, off);
+}