Documentation: update tutorial's discussion of origin

diff --git a/builtin-unpack-objects.c b/builtin-unpack-objects.c
index e70a71163d18dff1dd182c0d0b02967044693884..d351e02649401364e7384d0e784901e6f3fcb119 100644 (file)
--- a/builtin-unpack-objects.c
+++ b/builtin-unpack-objects.c
@@ -8,8 +8,6 @@
 #include "tag.h"
 #include "tree.h"
 
-#include <sys/time.h>
-
 static int dry_run, quiet, recover, has_errors;
 static const char unpack_usage[] = "git-unpack-objects [-n] [-q] [-r] < pack-file";
 
@@ -22,7 +20,7 @@ static SHA_CTX ctx;
  * Make sure at least "min" bytes are available in the buffer, and
  * return the pointer to the buffer.
  */
-static void * fill(int min)
+static void *fill(int min)
 {
        if (min <= len)
                return buffer + offset;
@@ -30,7 +28,7 @@ static void * fill(int min)
                die("cannot fill %d bytes", min);
        if (offset) {
                SHA1_Update(&ctx, buffer, offset);
-               memcpy(buffer, buffer + offset, len);
+               memmove(buffer, buffer + offset, len);
                offset = 0;
        }
        do {
@@ -371,6 +369,21 @@ int cmd_unpack_objects(int argc, const char **argv, const char *prefix)
                                recover = 1;
                                continue;
                        }
+                       if (!strncmp(arg, "--pack_header=", 14)) {
+                               struct pack_header *hdr;
+                               char *c;
+
+                               hdr = (struct pack_header *)buffer;
+                               hdr->hdr_signature = htonl(PACK_SIGNATURE);
+                               hdr->hdr_version = htonl(strtoul(arg + 14, &c, 10));
+                               if (*c != ',')
+                                       die("bad %s", arg);
+                               hdr->hdr_entries = htonl(strtoul(c + 1, &c, 10));
+                               if (*c)
+                                       die("bad %s", arg);
+                               len = sizeof(*hdr);
+                               continue;
+                       }
                        usage(unpack_usage);
                }