The quiet mode is now there!
usage: btrfs send [-ve] [-p <parent>] [-c <clone-src>] [-f <outfile>] <subvol>
[<subvol>...]
Send the subvolume(s) to stdout.
Sends the subvolume(s) specified by <subvol> to stdout.
By default, this will send the whole subvolume. To do an incremental
send, use '-p <parent>'. If you want to allow btrfs to clone from
any additional local snapshots, use '-c <clone-src>' (multiple times
where applicable). You must not specify clone sources unless you
guarantee that these snapshots are exactly in the same state on both
sides, the sender and the receiver. It is allowed to omit the
'-p <parent>' option when '-c <clone-src>' options are given, in
which case 'btrfs send' will determine a suitable parent among the
clone sources itself.
-e If sending multiple subvols at once, use the new
format and omit the end-cmd between the subvols.
-p <parent> Send an incremental stream from <parent> to
<subvol>.
-c <clone-src> Use this snapshot as a clone source for an
incremental send (multiple allowed)
-f <outfile> Output is normally written to stdout. To write to
a file, use this option. An alternative would be to
use pipes.
--no-data send in NO_FILE_DATA mode, Note: the output stream
does not contain any file data and thus cannot be used
to transfer changes. This mode is faster and useful to
show the differences in metadata.
-v|--verbose enable verbose output to stderr, each occurrence of
this option increases verbosity
-q|--quiet suppress all messages, except errors
** Tags removed: verification-needed
** Tags added: verification-done-xenial
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https://bugs.launchpad.net/bugs/1694891
Title:
All btrfs-tools commands need a quiet option for scripting
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