From 7c6f3ece662709ab596469d173ec5f4826e601ce Mon Sep 17 00:00:00 2001
From: Alan Jenkins <alan.christopher.jenkins@gmail.com>
Date: Thu, 20 Aug 2015 15:55:12 +0100
Subject: [PATCH 1/4] Initialize chunker fd to -1, so it's not equal to
 STDIN_FILENO (0)

---
 borg/_chunker.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/borg/_chunker.c b/borg/_chunker.c
index 5e599ed89..9dbed1fa5 100644
--- a/borg/_chunker.c
+++ b/borg/_chunker.c
@@ -96,6 +96,7 @@ chunker_init(int window_size, int chunk_mask, int min_size, int max_size, uint32
     c->table = buzhash_init_table(seed);
     c->buf_size = max_size;
     c->data = malloc(c->buf_size);
+    c->fh = -1;
     return c;
 }
 

From ce3e67cb96f5a189a2f93d5d4847d7dd4b5aea78 Mon Sep 17 00:00:00 2001
From: Alan Jenkins <alan.christopher.jenkins@gmail.com>
Date: Thu, 20 Aug 2015 17:19:48 +0100
Subject: [PATCH 2/4] chunker - fix 4GB files on 32-bit systems

From code inspection - effect not actually tested.
---
 borg/_chunker.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/borg/_chunker.c b/borg/_chunker.c
index 9dbed1fa5..8242a2243 100644
--- a/borg/_chunker.c
+++ b/borg/_chunker.c
@@ -83,7 +83,8 @@ typedef struct {
     PyObject *fd;
     int fh;
     int done, eof;
-    size_t remaining, bytes_read, bytes_yielded, position, last;
+    size_t remaining, position, last;
+    off_t bytes_read, bytes_yielded;
 } Chunker;
 
 static Chunker *

From 59a44296e4e6aace3c0fe0154fc1a27a7a75bee6 Mon Sep 17 00:00:00 2001
From: Alan Jenkins <alan.christopher.jenkins@gmail.com>
Date: Thu, 20 Aug 2015 17:48:59 +0100
Subject: [PATCH 3/4] chunker - cast from size_t to off_t can now be removed

Sorry, this should really have been part of the previous commit -
it's why I noticed a problem.
---
 borg/_chunker.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/borg/_chunker.c b/borg/_chunker.c
index 8242a2243..23abf1e6c 100644
--- a/borg/_chunker.c
+++ b/borg/_chunker.c
@@ -163,7 +163,7 @@ chunker_fill(Chunker *c)
         // size limit) kick out data from the cache that might be still useful
         // for the OS or other processes.
         if (length > 0) {
-            posix_fadvise(c->fh, (off_t) offset, (off_t) length, POSIX_FADV_DONTNEED);
+            posix_fadvise(c->fh, offset, length, POSIX_FADV_DONTNEED);
         }
         #endif
     }

From e244fe2f69288a01ae4aff2a5cef9ac6564ca21b Mon Sep 17 00:00:00 2001
From: Thomas Waldmann <tw@waldmann-edv.de>
Date: Sun, 6 Sep 2015 22:06:52 +0200
Subject: [PATCH 4/4] change 2 more chunker vars to off_t

so they get 64bit on 32bit platforms.
---
 borg/_chunker.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/borg/_chunker.c b/borg/_chunker.c
index 23abf1e6c..b817775b0 100644
--- a/borg/_chunker.c
+++ b/borg/_chunker.c
@@ -130,7 +130,7 @@ static int
 chunker_fill(Chunker *c)
 {
     ssize_t n;
-    size_t offset, length;
+    off_t offset, length;
     PyObject *data;
     memmove(c->data, c->data + c->last, c->position + c->remaining - c->last);
     c->position -= c->last;