add search-for-usb script

diff --git a/chiark-cryptdisk/search-for-usb b/chiark-cryptdisk/search-for-usb
new file mode 100755 (executable)
index 0000000..3e34ad0
--- /dev/null
+++ b/chiark-cryptdisk/search-for-usb
@@ -0,0 +1,28 @@
+#!/bin/bash -e
+# Detects a USB-attached hard drive given the USB vendor/device ID.
+# Only works if there is one matching device on the system.
+# Known to work with kernel version 2.6.32-24 - YMMV.
+#
+# N.B. that it's probably better to write a udev rule for your system
+# so you can write e.g. dev=mybakdrive in /etc/chiark-cryptdisk/config ...
+# e.g. in /etc/udev/rules.d/99bakdrive.rules: SUBSYSTEM=="block", SUBSYSTEMS=="usb", ATTRS{idVendor}=="040d", ATTRS{idProduct}=="6208", SYMLINK+="bakdrive"
+#
+# Usage: search-for-usb 1234:5678
+
+DEVICE=$1
+
+usb=`lsusb -d $DEVICE`
+# Bus 001 Device 006: ID 040d:6208 VIA Technologies, Inc.
+
+ndevs=`echo $usb | wc -l`
+case "$ndevs" in
+       0) echo No device found; exit 2 ;;
+       1) ;;
+       *) echo "$ndevs devices found; only 1 supported" ; exit 2 ;;
+esac
+
+bus=`echo ${usb} | cut '-d ' -f2`
+dev=`echo ${usb} | cut '-d ' -f4 | sed -e s,:.*,,`
+syspath=/sys`udevadm info -q path -n /dev/bus/usb/$bus/$dev`
+
+find $syspath -path '*/host*/target*/*:*:*:*/block' -print | xargs ls -L

diff --git a/debian/changelog b/debian/changelog
index 05ad7ad..e6adba8 100644 (file)
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,8 +1,9 @@
 chiark-cryptdisk (0.2.3) lucid; urgency=low
 
   * search-for-sata shebang should be bash, not sh.
+  * create search-for-usb script 
 
- -- Ross Younger <wry-deb@impropriety.org.uk>  Tue, 10 Aug 2010 21:00:26 +0100
+ -- Ross Younger <0ryoungerk.launchpad@coriolis.greenend.org.uk>  Tue, 10 Aug 2010 23:46:59 +0100
 
 chiark-cryptdisk (0.2.2) unstable; urgency=low