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hush: document a TODO in export builtin

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Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2009-06-03 14:43:56 +02:00
parent 6f22624a91
commit 0821801349
1 changed files with 16 additions and 2 deletions
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18
shell/hush.c
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@ -44,14 +44,28 @@
* *
* Bash stuff (maybe optionally enable?): * Bash stuff (maybe optionally enable?):
* &> and >& redirection of stdout+stderr * &> and >& redirection of stdout+stderr
* Brace expansion * Brace Expansion
* reserved words: [[ ]] function select * reserved words: [[ ]] function select
* substrings ${var:1:5} * substrings ${var:1:5}
* *
* TODOs: * TODOs:
* grep for "TODO" and fix (some of them are easy) * grep for "TODO" and fix (some of them are easy)
* builtins: ulimit * builtins: ulimit, local
* follow IFS rules more precisely, including update semantics * follow IFS rules more precisely, including update semantics
* export builtin should be special, its arguments are assignments
* and therefore expansion of them should be "one-word" expansion:
* $ export i=`echo 'a b'` # export has one arg: "i=a b"
* compare with:
* $ ls i=`echo 'a b'` # ls has two args: "i=a" and "b"
* ls: cannot access i=a: No such file or directory
* ls: cannot access b: No such file or directory
* Note1: same applies to local builtin when we'll have it.
* Note2: bash 3.2.33(1) does this only if export word itself
* is not quoted:
* $ export i=`echo 'aaa bbb'`; echo "$i"
* aaa bbb
* $ "export" i=`echo 'aaa bbb'`; echo "$i"
* aaa
* *
* Licensed under the GPL v2 or later, see the file LICENSE in this tarball. * Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
*/ */