From: Ray Andrews <rayandrews@eastlink.ca>
To: zsh-users@zsh.org
Subject: Re: exec
Date: Mon, 3 Jun 2024 07:42:02 -0700 [thread overview]
Message-ID: <aa551662-225c-44b4-8449-d56bd05cef7d@eastlink.ca> (raw)
In-Reply-To: <CAA=-s3xr_GoeqRRAf+UBQQR8NiOz_Sy6=456SeAq1-+ens1rZA@mail.gmail.com>
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On 2024-06-03 07:17, Mark J. Reed wrote:
> The *exec* builtin replaces the running shell with whatever program
> you run. The point is to avoid clogging the process table with shells
> that are just hanging out waiting to do nothing but exit as soon as
> their child process finishes.
I get that.
>
> In your case, the script exists to set things up in the environment
> and then run xfce4-session; there's nothing for it to do after
> xfce4-session completes, so it uses *exec* to tidy up.
Sure. But then what? I understand that if a script or function has
nothing more to do, it may as well pre-kill itself. But the difference
is that 'exec' kills the entire terminal, it doesn't just return to the
prompt in a more efficient way -- which would be easy to understand, as
above. exec seems to pull the rug out from under itself, not just end a
script more efficiently. In my case, from what I've heard control seems
to pass to dbus. Mind, if dbus called the script then that's what one
might expect.
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next prev parent reply other threads:[~2024-06-03 14:42 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-06-03 14:10 exec Ray Andrews
2024-06-03 14:17 ` exec Mark J. Reed
2024-06-03 14:42 ` Ray Andrews [this message]
2024-06-03 14:50 ` exec Eric Cook
2024-06-03 14:54 ` exec Mark J. Reed
2024-06-03 15:16 ` exec Mark J. Reed
2024-06-03 15:29 ` exec Ray Andrews
2024-06-03 15:22 ` exec Ray Andrews
2024-06-03 15:33 ` exec Mark J. Reed
2024-06-03 15:59 ` exec Ray Andrews
2024-06-03 16:06 ` exec Bart Schaefer
2024-06-03 16:23 ` exec Ray Andrews
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