Mail Archives: cygwin/2009/06/23/22:30:06
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A new release of readline, 6.0.3-1, and a corresponding bump in the
runtime library to the new package libreadline7, are now available for use
in cygwin 1.7, replacing 5.2.14-12 and libreadline6 as the current
version. Cygwin 1.5 users are unaffected by this change.
NEWS:
=====
This is a major upstream release, and incorporates all the official
upstream patches to date. Since it is built against newer cygwin
features, it should handle multibyte characters better; although I have
not given that aspect much testing. Upstream changes are listed below.
The library bumped versions because some previously exported symbols are
no longer available; however, the missing symbols were documented as
internal to readline and applications should not have been relying on them
anyway. Also, this library was built with gcc 4.
See also the upstream documentation in /usr/share/doc/readline/.
NOTES:
======
Be aware that an issue with offering libreadline as both a static and
dynamic library has been identified - some functions, such as
rl_function_of_keyseq, cannot work correctly with both library styles
without some additional __declspec decoration in the dynamic case. This
release caters to static compilation (and packages like bash that use the
problematic functions from dynamic readline have to add a minimal
workaround); it is possible that a future package will either be
dynamic-only, or that compiling against the static readline-6.0 will
require the declaration of a preprocessor macro, so that dynamic linking
works without requiring patches to every client.
DESCRIPTION:
============
The readline library will read a line from the terminal and return it,
allowing the user to edit the line with emacs or vi editing keys. It also
allows a history feature, for editing previous entries, making command
line interfaces easier-to-use and more intuitive.
libreadline7 provides the .dlls needed for readline and history expansion
for dynamic linking in other programs, including bash and gdb; it is
required for a minimal cygwin installation. The 7 in libreadline7
distinguishes incompatible API changes made to the prior libreadline5 and
libreadline6 libraries still available on the mirrors. readline provides
the documentation and the static libraries required for static linking;
you should only need it if you plan on compiling an application that links
with -lreadline or -lhistory.
UPDATE:
=======
To update your installation, click on the "Install Cygwin now" link on the
http://cygwin.com/ web page. This downloads setup.exe to your system.
Save it and run setup, answer the questions and pick up 'libreadline7'
from the 'Base' category (it should already be selected), or 'readline' in
the 'Devel' category. Be sure that you do not have any cygwin programs
running during the upgrade.
DOWNLOAD:
=========
Note that downloads from sources.redhat.com (aka cygwin.com) aren't
allowed due to bandwidth limitations. This means that you will need to
find a mirror which has this update, please choose the one nearest to you:
http://cygwin.com/mirrors.html
QUESTIONS:
==========
If you want to make a point or ask a question the Cygwin mailing list is
the appropriate place.
- --
Eric Blake
volunteer cygwin readline maintainer
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This document details the changes between this version, readline-6.0,
and the previous version, readline-5.2.
1. Changes to Readline
a. Fixed a number of redisplay errors in environments supporting multibyte
characters.
b. Fixed bugs in vi command mode that caused motion commands to inappropriately
set the mark.
c. When using the arrow keys in vi insertion mode, readline allows movement
beyond the current end of the line (unlike command mode).
d. Fixed bugs that caused readline to loop when the terminal has been taken
away and reads return -1/EIO.
e. Fixed bugs in redisplay occurring when displaying prompts containing
invisible characters.
f. Fixed a bug that caused the completion append character to not be reset to
the default after an application-specified completion function changed it.
g. Fixed a problem that caused incorrect positioning of the cursor while in
emacs editing mode when moving forward at the end of a line while using
a locale supporting multibyte characters.
h. Fixed an off-by-one error that caused readline to drop every 511th
character of buffered input.
i. Fixed a bug that resulted in SIGTERM not being caught or cleaned up.
j. Fixed redisplay bugs caused by multiline prompts with invisible characters
or no characters following the final newline.
k. Fixed redisplay bug caused by prompts consisting solely of invisible
characters.
l. Fixed a bug in the code that buffers characters received very quickly in
succession which caused characters to be dropped.
m. Fixed a bug that caused readline to reference uninitialized data structures
if it received a SIGWINCH before completing initialzation.
n. Fixed a bug that caused the vi-mode `last command' to be set incorrectly
and therefore unrepeatable.
o. Fixed a bug that caused readline to disable echoing when it was being used
with an output file descriptor that was not a terminal.
p. Readline now blocks SIGINT while manipulating internal data structures
during redisplay.
q. Fixed a bug in redisplay that caused readline to segfault when pasting a
very long line (over 130,000 characters).
r. Fixed bugs in redisplay when using prompts with no visible printing
characters.
s. Fixed a bug that caused redisplay errors when using prompts with invisible
characters and numeric arguments to a command in a multibyte locale.
t. Fixed a bug that caused redisplay errors when using prompts with invisible
characters spanning more than two physical screen lines.
2. New Features in Readline
a. A new variable, rl_sort_completion_matches; allows applications to inhibit
match list sorting (but beware: some things don't work right if
applications do this).
b. A new variable, rl_completion_invoking_key; allows applications to discover
the key that invoked rl_complete or rl_menu_complete.
c. The functions rl_block_sigint and rl_release_sigint are now public and
available to calling applications who want to protect critical sections
(like redisplay).
d. The functions rl_save_state and rl_restore_state are now public and
available to calling applications; documented rest of readline's state
flag values.
e. A new user-settable variable, `history-size', allows setting the maximum
number of entries in the history list.
f. There is a new implementation of menu completion, with several improvements
over the old; the most notable improvement is a better `completions
browsing' mode.
g. The menu completion code now uses the rl_menu_completion_entry_function
variable, allowing applications to provide their own menu completion
generators.
h. There is support for replacing a prefix of a pathname with a `...' when
displaying possible completions. This is controllable by setting the
`completion-prefix-display-length' variable. Matches with a common prefix
longer than this value have the common prefix replaced with `...'.
i. There is a new `revert-all-at-newline' variable. If enabled, readline will
undo all outstanding changes to all history lines when `accept-line' is
executed.
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