On 2014-03-26 20:47, Phillip Susi wrote:
> I could have sworn that I used the tty swtch feature once many years
> ago and that it sent a special signal to the shell, causing it to be
> suspended and return you to the parent shell, as if you had entered
> the suspend command. I can't find the signal in the man pages now,
> and using stty to set a swtch key and hitting it does nothing. Is
> this unimplemented on linux, and if so, shouldn't the man page be
> updated to reflect that?
AFAIK, Linux never had this feature built-in. I'm not quite old enough
to have actually used it, but I've read and saved a few Usenet posts
that say `shl` ("shell layers") only existed in very old Unix versions
like SVR3, to compete with BSD-style job control.
(Looks like Google Groups removed find-by-Message-ID, unfortunately. I
guess I could just attach all of the posts...)
On the other hand, there _is_ a reimplementation of shl for Linux and
Solaris, as part of heirloom-toolchest
<http://heirloom.sourceforge.net/tools.html> and
<http://heirloom.sourceforge.net/man/shl.1.html>.
--
Mantas Mikulėnas <grawity@xxxxxxxxx>
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