How to regain the focus back to the launch window? Post: 302926261

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LEARN ABOUT LINUX

eval

EVAL(P) 						     POSIX Programmer's Manual							   EVAL(P)

NAME

       eval - construct command by concatenating arguments

SYNOPSIS

       eval [argument ...]

DESCRIPTION

       The  eval  utility  shall  construct a command by concatenating arguments together, separating each with a <space>. The constructed command
       shall be read and executed by the shell.

OPTIONS

       None.

OPERANDS

       See the DESCRIPTION.

STDIN

       Not used.

INPUT FILES

       None.

ENVIRONMENT VARIABLES

       None.

ASYNCHRONOUS EVENTS

       Default.

STDOUT

       Not used.

STDERR

       The standard error shall be used only for diagnostic messages.

OUTPUT FILES

       None.

EXTENDED DESCRIPTION

       None.

EXIT STATUS

       If there are no arguments, or only null arguments, eval shall return a zero exit status; otherwise, it shall return the exit status of  the
       command defined by the string of concatenated arguments separated by <space>s.

CONSEQUENCES OF ERRORS

       Default.

       The following sections are informative.

APPLICATION USAGE

       None.

EXAMPLES

	      foo=10 x=foo
	      y='$'$x
	      echo $y
	      $fooeval y='$'$x
	      echo $y
	      10

RATIONALE

       None.

FUTURE DIRECTIONS

       None.

SEE ALSO

       Special Built-In Utilities

COPYRIGHT

       Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2003 Edition, Standard for Information Technol-
       ogy -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of
       Electrical  and	Electronics  Engineers, Inc and The Open Group. In the event of any discrepancy between this version and the original IEEE
       and The Open Group Standard, the original IEEE and The Open Group Standard is the referee document. The original Standard can  be  obtained
       online at http://www.opengroup.org/unix/online.html .

IEEE
/The Open Group						       2003								   EVAL(P)