2 files changed, 6 insertions, 8 deletions

diff --git a/bio.c b/bio.c
index 90dbcdc..fd3a47c 100644
--- a/bio.c
+++ b/bio.c
@@ -65,16 +65,12 @@ bget(uint dev, uint blockno)
 
   acquire(&bcache.lock);
 
-  // cprintf("bget %d\n", blockno);
-  
   // Is the block already cached?
   for(b = bcache.head.next; b != &bcache.head; b = b->next){
     if(b->dev == dev && b->blockno == blockno){
-      //cprintf("bget %d; get sleep lock for buffer %p\n", blockno, b - bcache.buf);
       b->refcnt++;
       release(&bcache.lock);
       acquiresleep(&b->lock);
-      //cprintf("bget: return buffer %p for blk %d\n", b - bcache.buf, blockno);
       return b;
     }
   }
@@ -84,14 +80,12 @@ bget(uint dev, uint blockno)
   // hasn't yet committed the changes to the buffer.
   for(b = bcache.head.prev; b != &bcache.head; b = b->prev){
     if(b->refcnt == 0 && (b->flags & B_DIRTY) == 0) {
-      // cprintf("bget %d; use %p for %d\n", b - bcache.buf, blockno);
       b->dev = dev;
       b->blockno = blockno;
       b->flags = 0;
       b->refcnt = 1;
       release(&bcache.lock);
       acquiresleep(&b->lock);
-      // cprintf("bget: return buffer %p for blk %d\n", b - bcache.buf, blockno);
       return b;
     }
   }
diff --git a/cat.c b/cat.c
index 2b2dcc7..5ddc820 100644
--- a/cat.c
+++ b/cat.c
@@ -9,8 +9,12 @@ cat(int fd)
 {
   int n;
 
-  while((n = read(fd, buf, sizeof(buf))) > 0)
-    write(1, buf, n);
+  while((n = read(fd, buf, sizeof(buf))) > 0) {
+    if (write(1, buf, n) != n) {
+      printf(1, "cat: write error\n");
+      exit();
+    }
+  }
   if(n < 0){
     printf(1, "cat: read error\n");
     exit();