Stewart Stremler wrote:
> begin quoting John H. Robinson, IV as of Thu, Jul 19, 2007 at 12:16:31PM
> -0700:
> [snip]
> > 7) grep foo bar | while read line; do ((count++)); done
> > Under bash, the value of count will not have changed as the pipelines
> > are under subshells. zsh does not do this.
> >
> > for i in 1 2 3; do echo foo; done > bar
> > unset count
> >
> > $ grep foo bar | while read line; do ((count++)); done
> > $ echo :$count:
> > ::
> >
> > % grep foo bar | while read line; do ((count++)); done
> > % echo :$count:
> > :3:
>
> Not sure I'd consider this a feature. Subshells are *supposed* to be
> divorced from their parent environment.
() is a subshell. (()) is arithmetic. while do done? I've never thought
of that as a subshll, and I am unsure what POSIX has to say about it.
> > chsh -s "`command which zsh`"
>
> It seems zsh does not set the SHELL environment variable.
No, login(1) does.
% man login|grep -C 1 SHELL
exists (other environment variables are preserved if the -p option is
used). Then the HOME, PATH, SHELL, TERM, MAIL, and LOGNAME environment
variables are set. PATH defaults to /usr/local/bin:/bin:/usr/bin for
[EMAIL PROTECTED]:~]% echo $SHELL
/bin/zsh
[EMAIL PROTECTED]:~]% bash
[EMAIL PROTECTED] ~]$ echo $SHELL
/bin/zsh
-john
--
[email protected]
http://www.kernel-panic.org/cgi-bin/mailman/listinfo/kplug-list
