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doc: Add extra hint on unattended use of gpg. 

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Werner Koch 2018-02-21 10:17:20 +01:00
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@ -3781,6 +3781,19 @@ If you are going to verify detached signatures, make sure that the
program knows about it; either give both filenames on the command line
or use @samp{-} to specify STDIN.
For scripted or other unattended use of @command{gpg} make sure to use
the machine-parseable interface and not the default interface which is
intended for direct use by humans. The machine-parseable interface
provides a stable and well documented API independent of the locale or
future changes of @command{gpg}. To enable this interface use the
options @option{--with-colons} and @option{--status-fd}. For certain
operations the option @option{--command-fd} may come handy too. See
this man page and the file @file{DETAILS} for the specification of the
interface. Note that the GnuPG ``info'' pages as well as the PDF
version of the GnuPG manual features a chapter on unattended use of
GnuPG. As an alternative the library @command{GPGME} can be used as a
high-level abstraction on top of that interface.
@mansect interoperability
@chapheading INTEROPERABILITY WITH OTHER OPENPGP PROGRAMS