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man ioctl_tty I dont have, but a lookup of TIOCSTI on the kernel source (via FreeElectrons ) will show tiocsti "fake input character", which uses a tty_struct context.

ioctl_tty(2) I dont have, but a lookup of TIOCSTI on the kernel source (via FreeElectrons ) will show tiocsti "fake input character", which uses a tty_struct context.

Note: although TIOCSTI has currently been revoked in BSD (Nov 2017), apparently the Linux Kernel developers are of the opposite mind, categorically refusing to revoke it

Note: although TIOCSTI was revoked in OpenBSD 6.2 (Oct 2017), apparently the Linux Kernel developers are of the opposite mind, categorically refusing to revoke it (you can read more about this in the OpenBSD Journal).

however it does echo it to the screen as well. After many hours of further reseach and experimentation the following is practical in a script or on the command line:

stty -echo; perl -le 'require "sys/ioctl.ph"; ioctl(STDIN, &TIOCSTI, $_) for split "", join " ", @ARGV ' `printf "hello"` ;stty echo

However it does echo it to the screen as well. After many hours of further research and experimentation the following is practical in a script or on the command line:

stty -echo; perl -le 'require "sys/ioctl.ph"; ioctl(STDIN, &TIOCSTI, $_) for split "", join " ", @ARGV ' `_cmds_` ;stty echo