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Full Discussion: Print the one function's log to the screen
Top Forums Shell Programming and Scripting Print the one function's log to the screen Post 302926386 by derekludwig on Monday 24th of November 2014 12:45:22 AM
Old 11-24-2014
Redirect the echo to the tty:
Code:
echo "failed" > /dev/tty

But this will work only if there is an active tty. But if you add:
Code:
if tty -s; then
   exec 3> /dev/tty # corrected from /dev/null
else
  exec 3>&2
fi

at the top of your script, and then change the echo to:
Code:
echo "failed" 1>&3

This will send the failed messages to stderr if there is no tty.
Last edited by derekludwig; 11-24-2014 at 02:51 PM.. Reason: wrong device
 

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LEARN ABOUT LINUX

tty

TTY(4)							     Linux Programmer's Manual							    TTY(4)

NAME

       tty - controlling terminal

DESCRIPTION

       The  file /dev/tty is a character file with major number 5 and minor number 0, usually of mode 0666 and owner.group root.tty.  It is a syn-
       onym for the controlling terminal of a process, if any.

       In addition to the ioctl(2) requests supported by the device that tty refers to, the ioctl(2) request TIOCNOTTY is supported.

   TIOCNOTTY
       Detach the calling process from its controlling terminal.

       If the process is the session leader, then SIGHUP and SIGCONT signals are sent to the foreground process group and  all	processes  in  the
       current session lose their controlling tty.

       This ioctl(2) call only works on file descriptors connected to /dev/tty.  It is used by daemon processes when they are invoked by a user at
       a terminal.  The process attempts to open /dev/tty.  If the open succeeds, it detaches itself from the terminal by using  TIOCNOTTY,  while
       if the open fails, it is obviously not attached to a terminal and does not need to detach itself.

FILES

       /dev/tty

SEE ALSO

       chown(1), mknod(1), ioctl(2), termios(3), console(4), tty_ioctl(4), ttyS(4), agetty(8), mingetty(8)

COLOPHON

       This  page is part of release 3.27 of the Linux man-pages project.  A description of the project, and information about reporting bugs, can
       be found at http://www.kernel.org/doc/man-pages/.

Linux								    2003-04-07								    TTY(4)
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