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37 lines
1.2 KiB
C
37 lines
1.2 KiB
C
.\" SPDX-License-Identifier: MIT
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.
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.Sh ENVIRONMENT VARIABLES
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.Bl -tag -compact -width 4n
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.It Ev TZPFMS_PASSPHRASE_HELPER
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By default, passphrases are prompted for and read in on the standard output and input streams.
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If
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.Ev TZPFMS_PASSPHRASE_HELPER
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is set and nonempty, it will be run via
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.Pa /bin/ Ns Nm sh Fl c
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to provide each passphrase, instead.
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.Pp
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The standard output stream of the helper is tied to an anonymous file and used in its entirety as the passphrase, except for a trailing new-line, if any.
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The arguments are:
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.Bl -tag -compact -offset 2n -width ".Li $1"
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.It Li $1
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Pre-formatted noun phrase with all the information below, for use as a prompt
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.\" Passphrase for tarta-zoot
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.\" New passphrase for tarta-zoot (again)
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.It Li $2
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Either the dataset name or the element of the TPM hierarchy being prompted for
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.It Li $3
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.Qq new
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if this is for a new passphrase, otherwise blank
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.It Li $4
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.Qq again
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if it's the second prompt for that passphrase, otherwise blank
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.El
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.Pp
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If the helper doesn't exist
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.Pq the shell exits with Sy 127 ,
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a diagnostic is issued and the normal prompt is used as fall-back.
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If it fails for any other reason, the prompting is aborted.
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.
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TZPFMS_PASSPHRASE_HELPER_MAN{}
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.El
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