centos man page for consoletype

CONSOLETYPE(1)						      General Commands Manual						    CONSOLETYPE(1)

NAME
       consoletype - print type of the console connected to standard input

SYNOPSIS
       consoletype [stdout] [fg]

DESCRIPTION
       consoletype  prints the type of console connected to standard input, and checks whether the console connected to standard input is the cur-
       rent foreground virtual console. With no arguments, it prints vt if console is a virtual terminal (/dev/tty* or /dev/console device if  not
       on  a serial console), serial if standard input is a serial console (/dev/console or /dev/ttyS*) and pty if standard input is a pseudo ter-
       minal.

RETURN VALUE
       consoletype when passed no arguments returns

       0      if on virtual terminal

       1      if on serial console

       2      if on a pseudo terminal.

       When passed the stdout argument, consoletype returns

       0      in all cases, and prints the console type to stdout.

       When passed the fg argument, consoletype returns

       0      if the console connected to standard input is the current virtual terminal

       1      otherwise.

RH
								   Red Hat, Inc 						    CONSOLETYPE(1)