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Re: multi-line command history does not work when new terminal opened
From: |
Chet Ramey |
Subject: |
Re: multi-line command history does not work when new terminal opened |
Date: |
Mon, 17 Aug 2020 10:09:08 -0400 |
User-agent: |
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:68.0) Gecko/20100101 Thunderbird/68.11.0 |
On 8/16/20 2:39 AM, Hyunho Cho wrote:
> Bash Version: 5.0
> Patch Level: 17
> Release Status: release
>
> ####################################################################
>
>
> I have enabled the shell options for multi-line command history like this
>
> shopt -s lithist
> shopt -s cmdhist
>
> and it works well in current terminal
>
> bash$ history
> 8651 echo history test 1
> 8652 echo history test 2
> 8653 echo history test 3
> 8654 cat << EOF
> 111
> 222 # multi-line command history works well
> 333
> EOF
>
> 8655 history
>
> -----------------------------------------------------------------------------------
>
> if i opened new terminal then the multi-line commands all changed to
> single lines like this
>
> bash$ history
> 7819 echo history test 1
> 7820 echo history test 2
> 7821 echo history test 3
> 7822 cat << EOF
> 7823 111 # the multi-line
> commands changed to single lines
> 7824 222
> 7825 333
> 7826 EOF
> 7827 history
When you enable `lithist', each line of a multi-line command is saved to
the history list with a trailing newline, and written to the history file
as a separate line. With the traditional readline history file format,
that makes each line a separate history entry unless the application uses
a delimiter to logically separate commands. With bash, that delimiter is
the timestamp that is controlled by HISTTIMEFORMAT.
Here are a couple of messages that explain the issue in detail:
https://lists.gnu.org/archive/html/bug-bash/2016-09/msg00112.html
https://lists.gnu.org/archive/html/bug-bash/2017-06/msg00119.html
--
``The lyf so short, the craft so long to lerne.'' - Chaucer
``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, UTech, CWRU chet@case.edu http://tiswww.cwru.edu/~chet/