You probably want to "exec tmux new-session", or use "tmux new-session -d"
instead.
Otherwise if it works it must be fine, shell script isn't meant to be
elegant... :-)
On Fri, Feb 26, 2010 at 09:57:39PM +1100, Trent W. Buck wrote:
> Because screen doesn't implement -c like a normal shell, I can't use it
> as my login shell without breaking scp(1) and suchlike. Thus for some
> time I've had this in my .bash_profile:
>
> ## The naive "chsh -s /usr/bin/screen" breaks scp (and other things).
> ## Have sh start screen automatically "when appropriate". That is,
> ## 1) not in a screen window (STY);
> ## 2) stdin is a tty;
> ## 3) screen is installed; and
> ## 4) terminal is capable of displaying screen.
> ## Replace "$STY" with "$STY$SSH_CLIENT$SSH_ORIGINAL_COMMAND" to avoid
> ## nesting screens when sshing (untested).
> test -z "$STY" -a -t 0 &&
> { which screen && tput clear && tput cup && ! tput hc && ! tput os
> } &>/dev/null && # ignore boring, expected error messages
> {
> ## If new session, start agents.
> screen -ls | grep -qi 'No Sockets found' &&
> eval "$(twb-agents)"
> ## Start screen.
> exec screen -DRR
> }
>
> The other advantage of this hack is that my login shell, stored in NIS,
> remains valid on hosts where neither screen nor tmux are installed. It
> is for this reason that I wish to extend the code above to auto-start
> tmux, rather than simply making tmux my login shell.
>
> The implementation below seems to work, but I suspect it's neither
> correct nor ideal. I'd appreciate any critique you care to give. Bash
> and a GNU userland can be assumed, but I can't assume RECENT ones (some
> hosts are still Fedora Core 1).
>
> test -z "$STY$TMUX" -a -t 0 &&
> {
> which tmux &>/dev/null &&
> {
> tmux list-sessions &>/dev/null ||
> {
> eval "$(twb-agents)"
> tmux new-session
> }
> exec tmux attach-session -d
> }
>
> { which screen && tput clear && tput cup && ! tput hc && ! tput os
> } &>/dev/null && # ignore boring, expected error messages
> {
> ## If new session, start agents.
> screen -ls | grep -qi 'No Sockets found' &&
> eval "$(twb-agents)"
> ## Start screen.
> exec screen -DRR
> }
> }
>
>
> PS: twb-agents is basically a NIH rewrite of Gentoo's keychain(1), see
> http://twb.ath.cx/Preferences/.bin/twb-agents .
>
>
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