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Subject: [PATCH 7 of 8] tee: use iounit for reads
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Date: Sun, 23 Aug 2015 16:49:17 -0700
From: mischief <mischief@offblast.org>
To: 9front@9front.org

# HG changeset patch
# User mischief <mischief@offblast.org>
# Date 1440366687 25200
#      Sun Aug 23 14:51:27 2015 -0700
# Node ID eb135d711d3e30fa57cfa2c87d53a2ac1a1ee34d
# Parent  8a7a4824b69f9c20955f3b96a01c142801f5af1f
tee: use iounit for reads

diff -r 8a7a4824b69f -r eb135d711d3e sys/src/cmd/tee.c
--- a/sys/src/cmd/tee.c	Sun Aug 23 14:51:27 2015 -0700
+++ b/sys/src/cmd/tee.c	Sun Aug 23 14:51:27 2015 -0700
@@ -12,7 +12,9 @@
 int	uflag;
 int	aflag;
 
-char in[8192];
+
+int	buflen;
+char	*buf;
 
 int	intignore(void*, char*);
 
@@ -61,12 +63,20 @@
 		argv++;
 	}
 
+	buflen = iounit(0);
+	if(buflen <= 0)
+		buflen = IOUNIT;
+
+	buf = sbrk(buflen);
+	if(buf == (void*)-1)
+		sysfatal("out of memory");
+
 	for(;;) {
-		r = read(0, in, sizeof in);
+		r = read(0, buf, buflen);
 		if(r <= 0)
 			exits(nil);
 		for(i=0; i<n; i++)
-			write(i+FDSTART, in, r);
+			write(i+FDSTART, buf, r);
 		write(1, in, r);
 	}
 }