From: Eric Biggers <ebiggers3@gmail.com>
Date: Sat, 6 Feb 2016 15:47:14 +0000 (-0600)
Subject: write.c: warn if WIM file cannot be truncated
X-Git-Tag: v1.9.1~46
X-Git-Url: https://wimlib.net/git/?p=wimlib;a=commitdiff_plain;h=832b0b2adaf6369d4d686006962206e867ac2a11

write.c: warn if WIM file cannot be truncated

Somewhat pointless since this is already an error path, but this avoids
a gcc warning about ftruncate()'s return value not being used.
---

diff --git a/src/write.c b/src/write.c
index 9f48d3f1..cc569395 100644
--- a/src/write.c
+++ b/src/write.c
@@ -3223,9 +3223,8 @@ out_truncate:
 			     WIMLIB_WRITE_FLAG_UNSAFE_COMPACT))) {
 		WARNING("Truncating \"%"TS"\" to its original size "
 			"(%"PRIu64" bytes)", wim->filename, old_wim_end);
-		/* Return value of ftruncate() is ignored because this is
-		 * already an error path.  */
-		(void)ftruncate(wim->out_fd.fd, old_wim_end);
+		if (ftruncate(wim->out_fd.fd, old_wim_end))
+			WARNING_WITH_ERRNO("Failed to truncate WIM file!");
 	}
 out_restore_hdr:
 	(void)write_wim_header_flags(wim->hdr.flags, &wim->out_fd);