From aef91306e38b72a9704c056e4c951c04b8843ca9 Mon Sep 17 00:00:00 2001
From: Andrew Cady <d@cryptonomic.net>
Date: Mon, 10 Jan 2022 22:42:19 -0500
Subject: switch to C ficlonerange instead of Python

---
 Makefile                    |  4 +++-
 src/partvi                  |  2 +-
 src/samizdat-ficlonerange.c | 51 +++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 55 insertions(+), 2 deletions(-)
 create mode 100644 src/samizdat-ficlonerange.c

diff --git a/Makefile b/Makefile
index bb35b13..3445d1f 100644
--- a/Makefile
+++ b/Makefile
@@ -1,6 +1,6 @@
 prefix?=/usr/local
 
-cc_files=wait_for_files samizdat-pinentry krng-add-entropy
+cc_files=wait_for_files samizdat-pinentry krng-add-entropy samizdat-ficlonerange
 cpp_files=dynmenu
 
 compiled_programs=${cc_files} ${cpp_files}
@@ -34,6 +34,8 @@ krng-add-entropy: src/krng-add-entropy.c | build-deps
 	$(CC) $(CFLAGS)  $< -o $@
 wait_for_files: src/wait_for_files.c | build-deps
 	$(CC) $(CFLAGS)  $< -o $@
+%: src/%.c | build-deps
+	$(CC) $(CFLAGS)  $< -o $@
 
 dyndns_realprog = dyndns.ssh-rsa.cryptonomic.net
 dyndns_links = dyndns.ssh-dss.cryptonomic.net                                 \
diff --git a/src/partvi b/src/partvi
index a0ac679..3b622ed 100755
--- a/src/partvi
+++ b/src/partvi
@@ -272,7 +272,7 @@ clone_parts_to_target()
 {
 
         f=$(readlink -e "$builddir"/"${f%.conf}") || return
-        ficlonerange.py "$f" "$target"
+        samizdat-ficlonerange "$f" "$target" 0 0 0
 }
 
 cleanup()
diff --git a/src/samizdat-ficlonerange.c b/src/samizdat-ficlonerange.c
new file mode 100644
index 0000000..a620cbf
--- /dev/null
+++ b/src/samizdat-ficlonerange.c
@@ -0,0 +1,51 @@
+#include <fcntl.h>
+#include <linux/fs.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/ioctl.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+
+int main(int argc, char **argv)
+{
+  if (argc != 6)
+    {
+      fputs("Error: usage: wrong number of arguments\n", stderr);
+      return -1;
+    }
+  char *src_name = argv[1];
+  char *dest_name = argv[2];
+  u_int64_t src_offset = atoll(argv[3]);
+  u_int64_t src_length = atoll(argv[4]);
+  u_int64_t dest_offset = atoll(argv[5]);
+
+  int src, dest;
+  if ((src = open(src_name, O_RDONLY)) < 0)
+    {
+      perror("Error opening input file");
+      return 1;
+    }
+  if ((dest = open(dest_name, O_RDWR | O_CREAT)) < 0)
+    {
+      perror("Error opening output file");
+      return 2;
+    }
+  if (dest_offset == 0)
+    {
+      struct stat buf;
+      stat(dest_name, &buf);
+      dest_offset = buf.st_size;
+    }
+
+  struct file_clone_range s = {src, src_offset, src_length, dest_offset};
+  if (ioctl(dest, FICLONERANGE, &s))
+    {
+      perror("ioctl FICLONERANGE failed");
+      return 3;
+    }
+  else
+    {
+      return 0;
+    }
+}
+
-- 
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