[erlang-patches] Shell history search

Fredrik <>
Tue Jan 8 11:06:56 CET 2013

Hello Fred,
You need to rebase upon 'master' branch and make changes to your patch, 
it fails to build on
'group.erl:536: function prompt_bytes/1 undefined'

Let me know when you are done,

BR Fredrik Gustafsson
Erlang OTP Team
On 01/04/2013 09:07 AM, Fredrik wrote:
> Hello Fred,
> Must have missed to reply to you, your patch has been in 'master-pu' 
> branch since wednesday.
> Thanks for your contribution.
> BR Fredrik Gustafsson
> Erlang OTP Team
> On 12/22/2012 11:41 PM, Fred Hebert wrote:
>> Hi, the following patch adds functionality to group.erl and edlin.erl in
>> order to allow the user to search history.
>> Search mode can be entered by pressing ctrl-r. Enter terms and press
>> ctrl-r again to search backwards, or ctrl-s to then search forward (if
>> you terminal doesn't eat up that one). Press enter to execute the line,
>> or use tab, arrow keys, or other control sequences (^D, ^K, etc.) to
>> exit search mode while remaining on the last found line.
>> The search mode is a simpler version of the one available in bash or
>> zsh shells.
>> This adds a few modes to the shell (search, on top of none and meta) in
>> group.erl for history search, and a few more in edlin.erl to change the
>> meaning of control sequences while searching.
>> This patch has been tested on OSX and some linux variants and worked
>> fine.
>> I tested it on Windows, and neither do werl.exe, or erl.exe (under
>> PowerShell or cmd.exe) capture the ^R and ^S sequences -- it will not
>> work there, but will not break any existing functionality. As far as I'm
>> aware, this is more likely a driver issue than an issue with the patch
>> (^G is not captured in cmd.exe, ctrl+C works in none of the above, for
>> example).
>> git fetch git://github.com/ferd/otp.git shell_history_search
>> Compare at:
>> https://github.com/ferd/otp/compare/erlang:master...ferd:shell_history_search 
>> https://github.com/ferd/otp/compare/erlang:master...ferd:shell_history_search.patch 
>> Regards,
>> Fred.
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