From: Eric Biggers <ebiggers3@gmail.com>
Date: Sat, 6 Jun 2015 19:26:37 +0000 (-0500)
Subject: Don't ftruncate() after rewriting blob uncompressed
X-Git-Tag: v1.8.2~66
X-Git-Url: https://wimlib.net/git/?p=wimlib;a=commitdiff_plain;h=239c797de4d6fb592a5c5f512cac0fa375864e12

Don't ftruncate() after rewriting blob uncompressed
---

diff --git a/src/write.c b/src/write.c
index c1d56de3..b2e687a8 100644
--- a/src/write.c
+++ b/src/write.c
@@ -769,13 +769,9 @@ write_blob_uncompressed(struct blob_descriptor *blob, struct filedes *out_fd)
 
 	wimlib_assert(out_fd->offset - begin_offset == blob->size);
 
-	if (out_fd->offset < end_offset &&
-	    0 != ftruncate(out_fd->fd, out_fd->offset))
-	{
-		ERROR_WITH_ERRNO("Can't truncate output file to "
-				 "offset %"PRIu64, out_fd->offset);
-		return WIMLIB_ERR_WRITE;
-	}
+	/* We could ftruncate() the file to 'out_fd->offset' here, but there
+	 * isn't much point.  Usually we will only be truncating by a few bytes
+	 * and will just overwrite the data immediately.  */
 
 	blob->out_reshdr.size_in_wim = blob->size;
 	blob->out_reshdr.flags &= ~(WIM_RESHDR_FLAG_COMPRESSED |