Import sources from 2011-03-30 iso image

1 files changed, 43 insertions, 0 deletions

diff --git a/sys/src/libbio/bwrite.c b/sys/src/libbio/bwrite.c
new file mode 100755
index 000000000..ae7a7d97c
--- /dev/null
+++ b/sys/src/libbio/bwrite.c
@@ -0,0 +1,43 @@
+#include	<u.h>
+#include	<libc.h>
+#include	<bio.h>
+
+long
+Bwrite(Biobufhdr *bp, void *ap, long count)
+{
+	long c;
+	uchar *p;
+	int i, n, oc;
+	char errbuf[ERRMAX];
+
+	p = ap;
+	c = count;
+	oc = bp->ocount;
+
+	while(c > 0) {
+		n = -oc;
+		if(n > c)
+			n = c;
+		if(n == 0) {
+			if(bp->state != Bwactive)
+				return Beof;
+			i = write(bp->fid, bp->bbuf, bp->bsize);
+			if(i != bp->bsize) {
+				errstr(errbuf, sizeof errbuf);
+				if(strstr(errbuf, "interrupt") == nil)
+					bp->state = Binactive;
+				errstr(errbuf, sizeof errbuf);
+				return Beof;
+			}
+			bp->offset += i;
+			oc = -bp->bsize;
+			continue;
+		}
+		memmove(bp->ebuf+oc, p, n);
+		oc += n;
+		c -= n;
+		p += n;
+	}
+	bp->ocount = oc;
+	return count-c;
+}