From: Mark Wooding <mdw@distorted.org.uk>
Date: Fri, 25 Mar 2022 11:24:46 +0000 (+0000)
Subject: bin/nocss: Handy script to inhibit CSS decryption by `libdvdread'.
X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~mdw/git/profile/commitdiff_plain/bc61033efdab44322d89327807116e7e3f6d348e?ds=sidebyside

bin/nocss: Handy script to inhibit CSS decryption by `libdvdread'.

My DVD archive is already decrypted, so CSS is unnecessary; but
`libdvdread' still takes some time -- sometimes a long time -- trying to
`crack' the nonexistent keys, and, on rare occasions, this can actually
result in a failure to read the plain content of the DVD image.
---

diff --git a/Makefile b/Makefile
index fa021c6..4388fe7 100644
--- a/Makefile
+++ b/Makefile
@@ -229,6 +229,13 @@ DOTLINKS		+= .tclshrc .wishrc
 .tclshrc_SRC		 = tclshrc
 .wishrc_SRC		 = tclshrc
 
+## The `nocss' machinery.
+SCRIPTLINKS		+= nocss
+all: $(HOME)/lib/hacks/nocss/libdvdcss.so.2
+$(HOME)/lib/hacks/nocss/libdvdcss.so.2:
+	$(V_AT)mkdir -p $(dir $@)
+	$(call v_tag,TOUCH)touch $@
+
 ## Random scripts.
 SCRIPTLINKS		+= mdw-editor mdw-pager
 SCRIPTLINKS		+= mdw-conf
diff --git a/bin/nocss b/bin/nocss
new file mode 100755
index 0000000..5adc23e
--- /dev/null
+++ b/bin/nocss
@@ -0,0 +1,10 @@
+#! /bin/sh -e
+
+case $# in 0) set -- "$SHELL" ;; esac
+DVDCSS_CACHE=none; export DVDCSS_CACHE
+DVDREAD_NOKEYS=t; export DVDREAD_NOKEYS
+if [ -d "$HOME/lib/hacks/nocss" ]; then
+  LD_LIBRARY_PATH=$HOME/lib/hacks/nocss${LD_LIBRARY_PATH+:$LD_LIBRARY_PATH}
+  export LD_LIBRARY_PATH
+fi
+exec "$@"