From b75ecd79d5e3776a6c8f5f0d95bc791776fc90f9 Mon Sep 17 00:00:00 2001
From: Andrew Wood <andrew.wood@ivarch.com>
Date: Sun, 3 May 2026 13:42:27 +0100
Subject: [PATCH] Add comments explaining the steps (#188).

---
 src/pv/file.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/pv/file.c b/src/pv/file.c
index 0d6d9a7..2134803 100644
--- a/src/pv/file.c
+++ b/src/pv/file.c
@@ -451,8 +451,10 @@ int pv_next_file(pvstate_t state, unsigned int filenum, int oldfd)
 					if (new_size < 0)
 						target_pipe_buffer_size = target_pipe_buffer_size / 2;
 				}
+				/* If all attempts failed, read the current size. */
 				if (new_size < 0) {
 					new_size = fcntl(state->transfer.intermediate_pipe[1], F_GETPIPE_SZ);
+					/* If unable to read, assume 64KiB. */
 					if (new_size < 0) {
 						new_size = 64 * 1024;
 					}