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Re: retrieving invocation arguments
- X-seq: zsh-users 4233
- From: Bart Schaefer <schaefer@xxxxxxxxxxxxxxxx>
- To: zsh-users@xxxxxxxxxx
- Subject: Re: retrieving invocation arguments
- Date: Mon, 17 Sep 2001 16:13:07 +0000
- In-reply-to: <20010917112344.A3210@xxxxxxxxxxxxxxxxxxxxxxx>
- Mailing-list: contact zsh-users-help@xxxxxxxxxx; run by ezmlm
- References: <20010914214218.A23939@xxxxxxxxxxxxxxxxxxxxxxx> <1010915173427.ZM1780@xxxxxxxxxxxxxxxxxxxxxxx> <20010917112344.A3210@xxxxxxxxxxxxxxxxxxxxxxx>
On Sep 17, 11:23am, Adam Spiers wrote:
}
} Currently I have
}
} restart () {
} exec $SHELL "$SHELL_ARGS" "$@"
} }
}
} and I do
}
} export SHELL_ARGS="$@"
}
} in my ~/.switch_shell (run from bash).
Ah. Well, "$@" doesn't include the option switches even in bash, and
bash has the same behavior as zsh with respect to $0 and the first non-
option argument following a -c command. Even if you did have the option
switches, you couldn't use them if $SHELL had changed from the original
shell.
Also, "$SHELL_ARGS" is going to be one argument where the original "$@"
may have had several.
And I should repeat the warning about `export SHELL_ARGS="$@"' -- "$@"
is an array with each element quoted, so what you've really written is
export SHELL_ARGS="$1" "$2" "$3" ...
which is probably not what you meant. Using "$@" works in bash because it
treats the arguments to `export' as if they were assignment expressions;
but in zsh that requires `setopt kshtypeset' (4.0.2 and later).
Anyway, it's very difficult to restart the shell exactly as it was invoked
unless you stash the arguments very early in .zshenv and have a cooperative
/etc/zshenv. Probably the best thing would be along the lines of:
restart_saveargs() {
local x='(interactive|shinstdin|stdin)'
local -a on off
typeset -ga restart_args restart_options
on=( ${(ok)options[(R)on]:#$~x} )
off=( ${(ok)options[(R)off]:#$~x}} )
restart_options=(
${on:+-o} ${(j.-o .)=on}
${off:++o} ${(j.+o .)=off}
)
restart_args=( "$@" )
}
restart() {
emulate -L zsh
if [[ $SHELL:t = zsh* ]]; then
exec $SHELL $restart_options $restart_args
else
exec $SHELL $restart_args
fi
}
restart_saveargs "$@"
And now that's probably more glorious detail than I should have included.
--
Bart Schaefer Brass Lantern Enterprises
http://www.well.com/user/barts http://www.brasslantern.com
Zsh: http://www.zsh.org | PHPerl Project: http://phperl.sourceforge.net
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