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commit bash-20121228 snapshot

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Chet Ramey
2013-01-03 10:48:31 -05:00
parent 36eb585cfa
commit 7175a77f3a
56 changed files with 52723 additions and 10878 deletions
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COMPAT
+21 -6
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@@ -365,16 +365,27 @@ version and versions 2.0 and above.
history expansion by default, since it results in a non-conforming
environment.
53. Bash-4.3 runs the replacement string in the pattern substitution word
expansion through quote removal. The code already treats quote
characters in the replacement string as special; if it treats them as
special, then quote removal should remove them.
Shell Compatibility Level
=========================
Bash-4.0 introduced the concept of a `shell compatibility level', specified
as a set of options to the shopt builtin (compat31, compat32, compat40, and
compat41 at this writing). There is only one current compatibility level --
each option is mutually exclusive. This list does not mention behavior
that is standard for a particular version (e.g., setting compat32 means that
quoting the rhs of the regexp matching operator quotes special regexp
characters in the word, which is default behavior in bash-3.2 and above).
as a set of options to the shopt builtin (compat31, compat32, compat40,
compat41, and compat42 at this writing). There is only one current
compatibility level -- each option is mutually exclusive. This list does not
mention behavior that is standard for a particular version (e.g., setting
compat32 means that quoting the rhs of the regexp matching operator quotes
special regexp characters in the word, which is default behavior in bash-3.2
and above).
Bash-4.3 introduces a new shell variable: BASH_COMPAT. The value assigned
to this variable (a decimal version number like 4.2, or an integer
corresponding to the compatNN option, like 42) determines the compatibility
level.
compat31 set
- the < and > operators to the [[ command do not consider the current
@@ -400,6 +411,10 @@ compat41 set
- when in posix mode, single quotes in the `word' portion of a
double-quoted parameter expansion define a new quoting context and
are treated specially
compat42 set
- the replacement string in double-quoted pattern substitution is not
run through quote removal, as in previous versions
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