Hi Dominic, Am 19.04.2017 um 08:39 schrieb Dominic Raferd: > Sorry if this is off-topic for this mailing list. I am setting up a > (Ubuntu 16.04) machine with dmcrypt+LUKS encrypted root system (standard > Debian/Ubuntu recipe) but with added capability for remote entry of the > passphrase (using dropbear via busybox shell). After the user has > entered the passphrase (and it is piped into /lib/cryptsetup/passfifo) I > would like an easy and preferably fast way for a local script (i.e. > running under busybox ash shell) to detect whether the passphrase entry > has been successful or not - without requiring local access or a second > remote login. Thanks for any help. Indeed it's slightly off-topic as initscripts and initramfs integration are specific to the distributions that ship/package cryptsetup. One quick idea is that you could test for existance of the /dev/mapper/<target> device file. If it exists, then the unlocking was successful. I usually logout of the system after remotely unlocking it via initramfs ssh session and monitor the ping in another terminal. If the ping stops being answered and continues a few seconds afterwards, that indicates that the unlock attempt was successful and I login to the booted system. Cheers jonas
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