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Deletions are marked like this. | Additions are marked like this. |
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Here's a ''partial'' list of the changes, in a more compact format: | A more extensive list than the one below can be found at http://wiki.bash-hackers.org/scripting/bashchanges |
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||'''Feature'''||'''Added in version'''|| ||read -N||4.1-alpha|| ||associative arrays||4.0-alpha|| ||&>> and |&||4.0-alpha|| ||coproc||4.0-alpha|| ||globstar||4.0-alpha|| ||mapfile/readarray||4.0-alpha|| ||x+=string||3.1-alpha1|| ||printf -v var||3.1-alpha1|| ||{x..y}||3.0-alpha|| ||${!array[@]}||3.0-alpha|| ||[[ =~||3.0-alpha|| ||<<<||2.05b-alpha1|| ||i++||2.04-devel|| ||for ((;;))||2.04-devel|| ||/dev/fd/N, /dev/tcp/host/port, etc.||2.04-devel|| ||a=(*.txt) file expansion||2.03-alpha|| ||extglob||2.02-alpha1|| ||[[||2.02-alpha1|| ||builtin printf||2.02-alpha1|| ||$(< filename)||2.02-alpha1|| ||** (exponentiation)||2.02-alpha1|| ||\xNNN||2.02-alpha1|| ||(( ))||2.0-beta2|| |
=== Notable changes in released bash versions === ||'''Feature'''||'''Added in version'''||'''Copied/inspired from'''|| ||PS0 (variable)||4.4 (2016)||native|| ||[[BashLoadableBuiltins|loadable builtin]] deployment infrastructure||4.4 (2016)||ksh93 (1993)|| ||mapfile/readarray -d||4.4 (2016)||native|| ||--help for builtins||4.4 (2016)||ksh93 (2001, possibly earlier)|| ||${var@spec}||4.4 (2016)||mksh (2012) for the syntax, zsh (1990s) for the feature|| ||local -||4.4 (2016)||zsh (set -o localoptions) (1995)|| ||$! and wait for process substitutions||4.4 (2016)||native|| ||wait -n||4.3 (2014)||native|| ||test -R||4.3 (2014)||ksh93 (1993)|| ||declare/typeset -n and associated changes to ${!ref} and for..in||4.3 (2014)||ksh93 (1993)|| ||array[-idx] (in assignments, read, unset, etc)||4.3 (2014)||zsh (1990s)|| ||\uXXXX and \UXXXXXXXX||4.2 (2011)||zsh (2001)|| ||declare -g||4.2 (2011)||zsh (1990s)|| ||test -v||4.2 (2011)||ksh93 (2009)|| ||printf %(fmt)T||4.2 (2011)||ksh93 (1999)|| ||${array[-idx]} and ${var:start:-len}||4.2 (2011)||zsh (1990s) and native|| ||lastpipe (shopt)||4.2 (2011)||ksh (1980s) default behaviour there|| ||read -N||4.1 (2010)||ksh93 (2003)|| ||{var}> or {var}< etc. (FD variable assignment)||4.1 (2010)||developed jointly with ksh93 and zsh|| ||syslog history (compile option)||4.1 (2010)||native|| ||BASH_XTRACEFD||4.1 (2010)||native|| ||;& and ;;& fall-throughs for case||4.0 (2009)||ksh93 (1993)|| ||associative arrays||4.0 (2009)||ksh93 (1993)|| ||&>> and |&||4.0 (2009)||native and csh (1970s)|| ||command_not_found_handle (function)||4.0 (2009)||native|| ||coproc (keyword)||4.0 (2009)||ksh (1980s), zsh (1990) for the coproc keyword|| ||globstar (shopt)||4.0 (2009)||zsh (1992), ksh93 (2005) for the name of the option|| ||mapfile/readarray (builtin)||4.0 (2009)||native|| ||${var,[,]} and ${var^[^]}||4.0 (2009)||native|| ||{009..012} (leading zeros in brace expansions)||4.0 (2009)||zsh (1995)|| ||{x..y..incr}||4.0 (2009)||ksh93 (2005)|| ||read -t 0.5||4.0 (2009)||zsh (2003)|| ||read -i||4.0 (2009)||zsh (vared) (1990s)|| ||x+=string array+=(string)||3.1 (2005)|| ksh93 (2000) || ||printf -v var||3.1 (2005)||native|| ||nocasematch (shopt)||3.1 (2005)||native|| ||{x..y}||3.0 (2004)||zsh (1995)|| ||${!array[@]}||3.0 (2004)||ksh93 (1993)|| ||[[ =~||3.0 (2004)||native|| ||printf %q produces $'...'||2.05b (2002)||ksh93 (1993)|| ||<<<||2.05b (2002)||zsh (1990s)|| ||i++||2.04 (2000)||ksh93 (1993)|| ||for ((;;))||2.04 (2000)||ksh93 (1993)|| ||/dev/fd/N, /dev/tcp/host/port, etc.||2.04 (2000)||ksh93 (1990s)|| ||read -t, -n, -d and -s||2.04 (2000)||ksh93 (1993)|| ||a=(*.txt) file expansion||2.03 (1999)||ksh93 (1993)|| ||extglob (shopt)||2.02 (1998)||ksh (1980s)|| ||[[||2.02 (1998)||ksh (1980s)|| ||printf (builtin)||2.02 (1998)||ksh (1980s)|| ||$(< filename)||2.02 (1998)||ksh (1980s)|| ||** (exponentiation)||2.02 (1998)||native|| ||\xNNN||2.02 (1998)||zsh (1994 or earlier)|| ||(( ))||2.0 (1996)||ksh (1980s)|| ||arrays||2.0 (1996)||ksh (1980s)|| ||$'...' (new quoting syntax)||2.0 (1996)||ksh93 (1993)|| === List of bash releases and other notable events === || '''Release''' || '''Date''' || || bash-4.4 || [[http://lists.gnu.org/archive/html/bug-bash/2016-09/msg00018.html|2016-09-16]] || ||<30%> Shellshock patches are released for bash-2.05b through bash-4.3 || 2014-09-24 to 2014-10-05 || || bash-4.3 || [[http://lists.gnu.org/archive/html/bug-bash/2014-02/msg00081.html|2014-02-27]] || || bash-4.2 || [[http://lists.gnu.org/archive/html/bug-bash/2011-02/msg00134.html|2011-02-14]] || || bash-4.1 || [[http://lists.gnu.org/archive/html/bug-bash/2010-01/msg00000.html|2010-01-02]] || || bash-4.0 || [[http://lists.gnu.org/archive/html/bug-bash/2009-02/msg00164.html|2009-02-23]] || || bash-3.2 || [[http://lists.gnu.org/archive/html/bug-bash/2006-10/msg00057.html|2006-10-12]] || || bash-3.1 || [[http://lists.gnu.org/archive/html/bug-bash/2005-12/msg00018.html|2005-12-09]] || || bash-3.0 || [[http://lists.gnu.org/archive/html/bug-bash/2004-07/msg00255.html|2004-07-27]] || || bash-2.05b || [[http://lists.gnu.org/archive/html/bug-bash/2002-07/msg00169.html|2002-07-17]] || || bash-2.05a || [[http://lists.gnu.org/archive/html/bug-bash/2001-11/msg00086.html|2001-11-15]] || || bash-2.05 || [[http://lists.gnu.org/archive/html/bug-bash/2001-04/msg00047.html|2001-04-09]] || || bash-2.04 || http://ftp.gnu.org/gnu/bash puts it around 2000-03-21 || || bash-2.03 || [[https://groups.google.com/d/msg/gnu.bash.bug/3t0I8b4C848/PD66z8r966oJ|1999-02-19]] || || bash-2.02 || [[https://groups.google.com/d/msg/gnu.bash.bug/wjK6DNyivbo/o_fzmlMXuh4J|1998-04-20]] || || bash-2.01 || [[https://groups.google.com/d/msg/gnu.bash.bug/1YaFSUY31SI/QeaBAOzEfNUJ|1997-06-06]] || || bash-2.0 || [[https://groups.google.com/d/msg/gnu.bash.bug/WE1Fa--vKw0/l9S7xZFP44AJ|1996-12-23]] || || bash-1.14 || [[https://groups.google.com/d/msg/gnu.bash.bug/oOfJhX8Es74/H1fYjpvy9toJ|1994-06-02]] || || bash-1.13 || [[https://groups.google.com/d/msg/gnu.bash.bug/KSGrYVYsxEE/ldpQw6UHd5wJ|1993-09-03]] || ||<colspan="2"> Looks like Chet Ramey takes over as maintainer between 1.12 and 1.13 || || bash-1.12 || [[https://groups.google.com/d/msg/gnu.bash.bug/LqJlezOLPmw/fWEU5dx63swJ|1992-01-26]] || || bash-1.11 || [[https://groups.google.com/d/msg/gnu.bash.bug/mtiSajVLFWQ/IO7lRZZaXuEJ|1992-01-10]] || || bash-1.10 || First mention found at [[https://groups.google.com/d/msg/gnu.bash.bug/2JCACpoweVo/VcbTlUED2L8J|1991-10-07]], so some time before that || || bash-1.09 || First mention found at [[https://groups.google.com/d/msg/gnu.bash.bug/r2mPhpzeFA0/uEe2lEymOOAJ|1991-06-02]] || || bash-1.08 || [[https://groups.google.com/d/msg/gnu.bash.bug/6IYJUqnlXbo/PtB74jsSdBEJ|1991-05-22]] || || bash-1.07 || likely [[https://groups.google.com/d/msg/gnu.bash.bug/IbPT47bVNak/TgM9oOgwDOEJ|1991-02-01]] || || bash-1.06 || This is a tough one. There was apparently a "bootleg" version of 1.06, so this requires more digging || || bash-1.05 || [[https://groups.google.com/d/msg/gnu.bash.bug/sdSJj38zObM/9OJmiMwsEeYJ|1990-03-03]] || || bash-1.04 || First mention found at [[https://groups.google.com/d/msg/gnu.bash.bug/OEAOMxIgXNM/_0MmMKhwBUoJ|1989-11-07]] || || bash-1.03 || [[https://groups.google.com/d/msg/gnu.bash.bug/0BNtldi31-I/0z3R_gKQQ5AJ|1989-09-02]] || || bash-1.02 || First mention found at [[https://groups.google.com/d/msg/gnu.bash.bug/n6oK8g9ZT_s/ZoiyAtJ0PmgJ|1989-07-09]] || || bash-1.01 || [[https://groups.google.com/d/msg/gnu.bash.bug/cDuxRblQx4c/KsqoeeDF7KgJ|1989-06-23]] || || bash-1.00 || Hard to search for ... || || bash-0.99 || First mention found at [[https://groups.google.com/d/msg/gnu.bash.bug/dliLANZUdwI/X-lY_E-bDRMJ|1989-06-11]] || |
Is there a list of which features were added to specific releases (versions) of Bash?
Here are some links to official Bash documentation:
NEWS: a file tersely listing the notable changes between the current and previous versions
CHANGES: a "complete" bash change history (back to 2.0 only)
COMPAT: compatibility issues between bash3 and previous versions
A more extensive list than the one below can be found at http://wiki.bash-hackers.org/scripting/bashchanges
Notable changes in released bash versions
Feature |
Added in version |
Copied/inspired from |
PS0 (variable) |
4.4 (2016) |
native |
loadable builtin deployment infrastructure |
4.4 (2016) |
ksh93 (1993) |
mapfile/readarray -d |
4.4 (2016) |
native |
--help for builtins |
4.4 (2016) |
ksh93 (2001, possibly earlier) |
${var@spec} |
4.4 (2016) |
mksh (2012) for the syntax, zsh (1990s) for the feature |
local - |
4.4 (2016) |
zsh (set -o localoptions) (1995) |
$! and wait for process substitutions |
4.4 (2016) |
native |
wait -n |
4.3 (2014) |
native |
test -R |
4.3 (2014) |
ksh93 (1993) |
declare/typeset -n and associated changes to ${!ref} and for..in |
4.3 (2014) |
ksh93 (1993) |
array[-idx] (in assignments, read, unset, etc) |
4.3 (2014) |
zsh (1990s) |
\uXXXX and \UXXXXXXXX |
4.2 (2011) |
zsh (2001) |
declare -g |
4.2 (2011) |
zsh (1990s) |
test -v |
4.2 (2011) |
ksh93 (2009) |
printf %(fmt)T |
4.2 (2011) |
ksh93 (1999) |
${array[-idx]} and ${var:start:-len} |
4.2 (2011) |
zsh (1990s) and native |
lastpipe (shopt) |
4.2 (2011) |
ksh (1980s) default behaviour there |
read -N |
4.1 (2010) |
ksh93 (2003) |
{var}> or {var}< etc. (FD variable assignment) |
4.1 (2010) |
developed jointly with ksh93 and zsh |
syslog history (compile option) |
4.1 (2010) |
native |
BASH_XTRACEFD |
4.1 (2010) |
native |
;& and ;;& fall-throughs for case |
4.0 (2009) |
ksh93 (1993) |
associative arrays |
4.0 (2009) |
ksh93 (1993) |
&>> and |& |
4.0 (2009) |
native and csh (1970s) |
command_not_found_handle (function) |
4.0 (2009) |
native |
coproc (keyword) |
4.0 (2009) |
ksh (1980s), zsh (1990) for the coproc keyword |
globstar (shopt) |
4.0 (2009) |
zsh (1992), ksh93 (2005) for the name of the option |
mapfile/readarray (builtin) |
4.0 (2009) |
native |
${var,[,]} and ${var^[^]} |
4.0 (2009) |
native |
{009..012} (leading zeros in brace expansions) |
4.0 (2009) |
zsh (1995) |
{x..y..incr} |
4.0 (2009) |
ksh93 (2005) |
read -t 0.5 |
4.0 (2009) |
zsh (2003) |
read -i |
4.0 (2009) |
zsh (vared) (1990s) |
x+=string array+=(string) |
3.1 (2005) |
ksh93 (2000) |
printf -v var |
3.1 (2005) |
native |
nocasematch (shopt) |
3.1 (2005) |
native |
{x..y} |
3.0 (2004) |
zsh (1995) |
${!array[@]} |
3.0 (2004) |
ksh93 (1993) |
[[ =~ |
3.0 (2004) |
native |
printf %q produces $'...' |
2.05b (2002) |
ksh93 (1993) |
<<< |
2.05b (2002) |
zsh (1990s) |
i++ |
2.04 (2000) |
ksh93 (1993) |
for ((;;)) |
2.04 (2000) |
ksh93 (1993) |
/dev/fd/N, /dev/tcp/host/port, etc. |
2.04 (2000) |
ksh93 (1990s) |
read -t, -n, -d and -s |
2.04 (2000) |
ksh93 (1993) |
a=(*.txt) file expansion |
2.03 (1999) |
ksh93 (1993) |
extglob (shopt) |
2.02 (1998) |
ksh (1980s) |
[[ |
2.02 (1998) |
ksh (1980s) |
printf (builtin) |
2.02 (1998) |
ksh (1980s) |
$(< filename) |
2.02 (1998) |
ksh (1980s) |
** (exponentiation) |
2.02 (1998) |
native |
\xNNN |
2.02 (1998) |
zsh (1994 or earlier) |
(( )) |
2.0 (1996) |
ksh (1980s) |
arrays |
2.0 (1996) |
ksh (1980s) |
$'...' (new quoting syntax) |
2.0 (1996) |
ksh93 (1993) |
List of bash releases and other notable events
Release |
Date |
bash-4.4 |
|
Shellshock patches are released for bash-2.05b through bash-4.3 |
2014-09-24 to 2014-10-05 |
bash-4.3 |
|
bash-4.2 |
|
bash-4.1 |
|
bash-4.0 |
|
bash-3.2 |
|
bash-3.1 |
|
bash-3.0 |
|
bash-2.05b |
|
bash-2.05a |
|
bash-2.05 |
|
bash-2.04 |
http://ftp.gnu.org/gnu/bash puts it around 2000-03-21 |
bash-2.03 |
|
bash-2.02 |
|
bash-2.01 |
|
bash-2.0 |
|
bash-1.14 |
|
bash-1.13 |
|
Looks like Chet Ramey takes over as maintainer between 1.12 and 1.13 |
|
bash-1.12 |
|
bash-1.11 |
|
bash-1.10 |
First mention found at 1991-10-07, so some time before that |
bash-1.09 |
First mention found at 1991-06-02 |
bash-1.08 |
|
bash-1.07 |
likely 1991-02-01 |
bash-1.06 |
This is a tough one. There was apparently a "bootleg" version of 1.06, so this requires more digging |
bash-1.05 |
|
bash-1.04 |
First mention found at 1989-11-07 |
bash-1.03 |
|
bash-1.02 |
First mention found at 1989-07-09 |
bash-1.01 |
|
bash-1.00 |
Hard to search for ... |
bash-0.99 |
First mention found at 1989-06-11 |