From: Ardis Lu <ardisglu@gmail.com>
Date: Fri, 3 May 2024 22:46:27 +0000 (-0700)
Subject: Use POSIX UStar magic number
X-Git-Url: https://git.ardis.lu/?a=commitdiff_plain;h=30536614f7687332bf6b526e1062b8ca7e2fc98e;p=targz

Use POSIX UStar magic number

Previously used pre-POSIX magic. Reference: https://stackoverflow.com/a/19368399/21084807
---

diff --git a/index.html b/index.html
index e549e38..c0a09a8 100644
--- a/index.html
+++ b/index.html
@@ -82,13 +82,14 @@
           ...encoder.encode('        '), // 8 bytes: Checksum for header record
           ...encoder.encode('0'), // 1 byte: Link indicator (file type)
           ...encoder.encode('\0'.repeat(100)), // 100 bytes: Name of linked file
-          ...encoder.encode('ustar  '), // 8 bytes: magic number 'ustar  '
+          ...encoder.encode('ustar\0'), // 6 bytes: magic number "ustar\0"
+          ...encoder.encode('00'), // 2 bytes: UStar version
           ...encoder.encode('\0'.repeat(32)), // 32 bytes: Owner user name
           ...encoder.encode('\0'.repeat(32)), // 32 bytes: Owner group name
           ...encoder.encode('\0'.repeat(8)), // 8 bytes: Device major number
           ...encoder.encode('\0'.repeat(8)), // 8 bytes: Device minor number
           ...encoder.encode('\0'.repeat(155)), // 155 bytes: Filename prefix
-          ...encoder.encode('\0'.repeat(13)), // 13 bytes: empty padding to reach 512 bytes
+          ...encoder.encode('\0'.repeat(12)), // 12 bytes: empty padding to reach 512 bytes
         ];
         const checksum = header.reduce((a, b) => a + b);
         header.splice(148, 8, ...encoder.encode(`${checksum.toString(8).padStart(6, '0')}\0 `));