Differences between revisions 12 and 46 (spanning 34 versions)
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Deletions are marked like this. Additions are marked like this.
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A more extensive, partial list than the one below can be found at http://wiki.bash-hackers.org/scripting/bashchanges A more extensive list than the one below can be found at http://wiki.bash-hackers.org/scripting/bashchanges
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Here's a ''partial'' list of the changes, in a more compact format: === Notable changes in released bash versions ===
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||'''Feature'''||'''Added in version'''||
||read -N||4.1-alpha||
||associative arrays||4.0-alpha||
||&>> and |&||4.0-alpha||
||command_not_found_handle||4.0-alpha||
||coproc||4.0-alpha||
||globstar||4.0-alpha||
||mapfile/readarray||4.0-alpha||
||${var,[,]} and ${var^[^]}||4.0-alpha||
||{009..012} (leading zeros in brace expansions)||4.0-alpha||
||x+=string array+=(string)||3.1-alpha1||
||printf -v var||3.1-alpha1||
||{x..y}||3.0-alpha||
||${!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||
||$(< filename)||2.02-alpha1||
||** (exponentiation)||2.02-alpha1||
||\xNNN||2.02-alpha1||
||(( ))||2.0-beta2||
||'''Feature'''||'''Added in version'''||'''Copied/inspired from'''||
||PS0 (variable)||4.4 (2016)||native||
||[[BashLoadableBuiltins|loadable builtin]] deployment infrastructure||4.4 (2016)||ksh93 (1993)||
||mapfile/readarray -d||4.4 (2016)||native||
||--help for builtins||4.4 (2016)||ksh93 (2001, possibly earlier)||
||${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 ${var&#94;[&#94;]}||4.0 (2009)||native||
||{009..012} (leading zeros in brace expansions)||4.0 (2009)||zsh (1995)||
||{x..y..incr}||4.0 (2009)||ksh93 (2005)||
||read -t 0.5||4.0 (2009)||zsh (2003)||
||read -i||4.0 (2009)||zsh (vared) (1990s)||
||x+=string array+=(string)||3.1 (2005)|| ksh93 (2000) ||
||printf -v var||3.1 (2005)||native||
||nocasematch (shopt)||3.1 (2005)||native||
||{x..y}||3.0 (2004)||zsh (1995)||
||${!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||
||\xNN||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

\xNN

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

2016-09-16

Shellshock patches are released for bash-2.05b through bash-4.3

2014-09-24 to 2014-10-05

bash-4.3

2014-02-27

bash-4.2

2011-02-14

bash-4.1

2010-01-02

bash-4.0

2009-02-23

bash-3.2

2006-10-12

bash-3.1

2005-12-09

bash-3.0

2004-07-27

bash-2.05b

2002-07-17

bash-2.05a

2001-11-15

bash-2.05

2001-04-09

bash-2.04

http://ftp.gnu.org/gnu/bash puts it around 2000-03-21

bash-2.03

1999-02-19

bash-2.02

1998-04-20

bash-2.01

1997-06-06

bash-2.0

1996-12-23

bash-1.14

1994-06-02

bash-1.13

1993-09-03

Looks like Chet Ramey takes over as maintainer between 1.12 and 1.13

bash-1.12

1992-01-26

bash-1.11

1992-01-10

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

1991-05-22

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

1990-03-03

bash-1.04

First mention found at 1989-11-07

bash-1.03

1989-09-02

bash-1.02

First mention found at 1989-07-09

bash-1.01

1989-06-23

bash-1.00

Hard to search for ...

bash-0.99

First mention found at 1989-06-11

BashFAQ/061 (last edited 2024-04-14 22:29:57 by emanuele6)