From 59ad42f086b631ffad0bb15b520addd1f7e1ba2b Mon Sep 17 00:00:00 2001
From: Adrian Dvergsdal <github.com@konto.atmoz.no>
Date: Sun, 22 Oct 2017 23:25:52 +0200
Subject: [PATCH] Less stricter username regex (but still POSIX)

For more info See this answer: https://serverfault.com/a/578264

Relevant issue: https://github.com/atmoz/sftp/issues/94
---
 entrypoint | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/entrypoint b/entrypoint
index e5f2601..62b58df 100755
--- a/entrypoint
+++ b/entrypoint
@@ -7,7 +7,7 @@ userConfPathLegacy="/etc/sftp-users.conf"
 userConfFinalPath="/var/run/sftp/users.conf"
 
 # Extended regular expression (ERE) for arguments
-reUser='[a-z_][a-z0-9._-]{0,31}'
+reUser='[A-Za-z0-9._][A-Za-z0-9._-]{0,31}' # POSIX.1-2008
 rePass='[^:]{0,255}'
 reUid='[[:digit:]]*'
 reGid='[[:digit:]]*'