Re: Initiate command in another shell session?

On 2025-03-13, Keith Thompson <Keith.S.Thompson+u@gmail.com> wrote:

On some systems, opening a tty and calling ioctl(fd, TIOCSTI, ptr),
where ptr is a char*, will cause the single character *p to appear
as if it had been typed.

I associate TIOCSTI with csh(1)'s filename expansion feature, but
a look at the BSD history shows that the introduction of the ioctl
precedes the csh feature there by three years--1980 and 1983,
respectively.

This might not work for a tty other than
the current stdin, and it's started requiring root access in recent
Ubuntu releases.

OpenBSD has dropped TIOCSTI completely a number of years ago.
*checks history* Functionality neutered in 2017, removed in 2018.
"Due to risks known for decades", says the commit message.

--
Christian "naddy" Weisgerber                          naddy@mips.inka.de