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Send commands to another TTY

cat <<END_OF_TTYEXEC > ttyexec.py
#!/usr/bin/python

import sys,os,fcntl,termios
if len(sys.argv) != 3:
   sys.stderr.write("usage: ttyexec.py tty command\n")
   sys.exit(1)
fd = os.open("/dev/" + sys.argv[1], os.O_RDWR)
cmd=sys.argv[2]
for i in range(len(cmd)):
   fcntl.ioctl(fd, termios.TIOCSTI, cmd[i])
fcntl.ioctl(fd, termios.TIOCSTI, '\n')
os.close(fd)
END_OF_TTYEXEC

chmod +x ttyexec.py

It can be used to exit a shell for example, or an interactive testpmd session.

./ttyexec.py pts/0 quit