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Re: Multiline commands do not survive history -w/-r
From: |
Chet Ramey |
Subject: |
Re: Multiline commands do not survive history -w/-r |
Date: |
Mon, 12 Jun 2017 11:09:38 -0400 |
User-agent: |
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.12; rv:52.0) Gecko/20100101 Thunderbird/52.1.1 |
On 6/11/17 9:00 PM, gazelle@xmission.com wrote:
> Bash Version: 4.3
> Patch Level: 48
> Release Status: release
>
> Description:
> Multiline commands (i.e., a command with embedded newlines) do not
> survive
> intact when written out to the history file and then reloaded.
Yes, the history file format is explicitly line-oriented. Bash-4.4
introduced a heuristic that allows multi-line history entries to work
without changing the file format or introducing an additional special
character. From the NEWS file:
k. If readline reads a history file that begins with `#' (or the value of
the history comment character) and has enabled history timestamps, the
history entries are assumed to be delimited by timestamps. This allows
multi-line history entries.
You enable history file timestamp writing by having HISTTIMEFORMAT set. It
can have a null value.
--
``The lyf so short, the craft so long to lerne.'' - Chaucer
``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, UTech, CWRU chet@case.edu http://cnswww.cns.cwru.edu/~chet/