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Re: Incompatibility when Zsh invoked as 'sh'
- X-seq: zsh-workers 16545
- From: "Bart Schaefer" <schaefer@xxxxxxxxxxxxxxxx>
- To: DervishD <raul@xxxxxxxxxxxx>, Zsh <zsh-workers@xxxxxxxxxx>, Dan Nelson <dnelson@xxxxxxxxxxxxxxx>
- Subject: Re: Incompatibility when Zsh invoked as 'sh'
- Date: Mon, 4 Feb 2002 03:46:42 +0000
- In-reply-to: <E16XVpG-0006tm-00@xxxxxxxxxxxxxxxxxxxxx>
- In-reply-to: <20020204025121.GI6310@xxxxxxxxxxxxxxxx>
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- References: <E16XVpG-0006tm-00@xxxxxxxxxxxxxxxxxxxxx> <20020204025121.GI6310@xxxxxxxxxxxxxxxx>
On Feb 4, 12:13am, DervishD wrote:
} Well, the error is the '[*' pattern, which zsh says is a 'bat
} pattern'. Bash treats it as the regex 'match an opening bracket and
} anything after it', but zsh doesn't.
On Feb 3, 8:51pm, Dan Nelson wrote:
} ash does not complain; args starting with a bracket match the 1st case.
} pdksh-5.2.14 run as sh does not complain, but only the literal argument
} [* matches.
} I don't have a link to the new Single Unix spec at the moment; what's
} it say?
Anyone who registers their email address can now get the latest Single
Unix spec on line; start at http://www.unix-systems.org/version3/
The spec says:
When unquoted and outside a bracket expression, the following three
characters shall have special meaning in the specification of patterns:
? A question-mark is a pattern that shall match any character.
* An asterisk is a pattern that shall match multiple characters, as
described in Patterns Matching Multiple Characters.
[ The open bracket shall introduce a pattern bracket expression.
It goes on:
Section 9.3.5, RE Bracket Expression shall also apply to the pattern
bracket expression, except that the exclamation mark character ( '!' )
shall replace the circumflex character ( '^' ) in its role in a "non-
matching list" in the regular expression notation. A bracket expression
starting with an unquoted circumflex character produces unspecified
Nothing in section 9.3.5 allows for an unmatched left-bracket to match a
literal bracket. The description of the "case" construct doesn't make
any exception to this, either.
Bart Schaefer Brass Lantern Enterprises
Zsh: http://www.zsh.org | PHPerl Project: http://phperl.sourceforge.net
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