From: Michael Tremer <michael.tremer@ipfire.org>
Date: Tue, 7 Sep 2021 16:51:46 +0000 (+0000)
Subject: downloader: Avoid calling fwrite() for empty blocks
X-Git-Tag: 0.9.28~974
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8398466dd3f3e8c067d9323f52f95d7f2dbe2787;p=pakfire.git

downloader: Avoid calling fwrite() for empty blocks

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>
---

diff --git a/src/libpakfire/downloader.c b/src/libpakfire/downloader.c
index 25852aa19..156493920 100644
--- a/src/libpakfire/downloader.c
+++ b/src/libpakfire/downloader.c
@@ -563,6 +563,10 @@ static int pakfire_transfer_done(struct pakfire_downloader* downloader,
 static size_t pakfire_downloader_write(char* data, size_t size, size_t nmemb, void* userdata) {
 	struct pakfire_transfer* transfer = (struct pakfire_transfer*)userdata;
 
+	// Do not write empty blocks
+	if (!size)
+		return size;
+
 	// Write everything to the allocated file descriptor
 	return fwrite(data, size, nmemb, transfer->f);
 }