A patch to have GnuPG21 use shared access to PC/SC. SHA256: bb1586db3315ae84916d24de67a8e531fd8883e42303c018af27ae936f00ba97

gnupg21-pcsc-shared.patch

diff --git a/scd/apdu.c b/scd/apdu.c
index 149154c..d9b166c 100644
--- a/scd/apdu.c
+++ b/scd/apdu.c
@@ -1535,7 +1535,7 @@ connect_pcsc_card (int slot)

   err = pcsc_connect (reader_table[slot].pcsc.context,
                       reader_table[slot].rdrname,
-                      PCSC_SHARE_EXCLUSIVE,
+                      PCSC_SHARE_SHARED,
                       PCSC_PROTOCOL_T0|PCSC_PROTOCOL_T1,
                       &reader_table[slot].pcsc.card,
                       &reader_table[slot].pcsc.protocol);