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Added a put_chars_sync to the protocol that can be used to
talk to user_drv and made group use it. This is needed in order
to guarantee that bytes has been pushed to the tty port when
doing something like this:
io:format("halting\n"),erlang:halt(0).
Before this change the halting message could be lost in the message
queue of the user_drv process, this is no longer possible.
This commit also fixes ssh_cli as that plugs itself in as a user_drv
process.
OTP-12240
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The documentation of some Unicode functions in io_lib was committed by
mistake.
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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. Exiting is also
possible by pressing the escape key twice.
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.
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* dp/shell-line-editing:
Readline-style line edit history
OTP-8635 dp/shell-line-editing
The shell's line editing has been improved to more resemble the behaviour
of readline and other shells. (Thanks to Dave Peticolas)
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Change the shell's line buffer mechanism to more
closely match readline-based shells. New behavior:
1. Blank lines are not added to the line buffer.
2. Pressing the down arrow on the last line causes no change.
The previous behavior erased the line.
3. The new line is temporarily added to the line buffer
so the user can move to previous lines with up arrows
and then back to the new line with down arrows.
The previous behavior discarded the partially written
new line.
4. Changes made to previous lines while exploring the line
buffer history are preserved.
The previous behavior discarded changes made to older lines.
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