From 9376361bcb8e323c7041d19895f967b5bf3ba038 Mon Sep 17 00:00:00 2001
From: Xavier Del Campo Romero <xavi.dcr@tutanota.com>
Date: Thu, 19 Oct 2023 15:32:22 +0200
Subject: [PATCH] main.c: Use BUFSIZ instead of arbitrary value

According to C99 7.19.1p3:

BUFSIZ is a macro that expands to an integer constant expression that is
the size of the buffer used by the setbuf function.

In other words, this means BUFSIZ is the most optimal length for a
buffer that reads a file into memory in chunks using fread(3).
---
 main.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/main.c b/main.c
index df8cd21..ae501a3 100644
--- a/main.c
+++ b/main.c
@@ -1060,7 +1060,7 @@ static int move_file(const char *const old, const char *const new)
 
     for (off_t i = 0; i < sb.st_size;)
     {
-        char buf[1024];
+        char buf[BUFSIZ];
         const off_t left = sb.st_size - i;
         const size_t rem = left > sizeof buf ? sizeof buf : left;
         ssize_t w;