From 49798253e0734806ffc02b11056a96da186a1bd6 Mon Sep 17 00:00:00 2001
From: Martin Mares <mj@ucw.cz>
Date: Wed, 5 Nov 2003 20:43:27 +0000
Subject: [PATCH] bbcopy() can be asked to copy the rest of the input file by
 specifying a length of ~0U.

---
 lib/fastbuf.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/lib/fastbuf.c b/lib/fastbuf.c
index 50b869a8..0929f101 100644
--- a/lib/fastbuf.c
+++ b/lib/fastbuf.c
@@ -314,14 +314,19 @@ bbcopy_slow(struct fastbuf *f, struct fastbuf *t, uns l)
 
       favail = bdirect_read_prepare(f, &fptr);
       if (!favail)
-	die("bbcopy: source exhausted");
+	{
+	  if (l == ~0U)
+	    return;
+	  die("bbcopy: source exhausted");
+	}
       tavail = bdirect_write_prepare(t, &tptr);
       n = MIN(l, favail);
       n = MIN(n, tavail);
       memcpy(tptr, fptr, n);
       bdirect_read_commit(f, fptr + n);
       bdirect_write_commit(t, tptr + n);
-      l -= n;
+      if (l != ~0U)
+	l -= n;
     }
 }
 
-- 
2.39.5