DOT(1P) 						     POSIX Programmer's Manual							   DOT(1P)

PROLOG

       This  manual page is part of the POSIX Programmer's Manual.  The Linux implementation of this interface may differ (consult the correspond-
       ing Linux manual page for details of Linux behavior), or the interface may not be implemented on Linux.

NAME

       dot - execute commands in the current environment

SYNOPSIS

       . file

DESCRIPTION

       The shell shall execute commands from the file in the current environment.

       If file does not contain a slash, the shell shall use the search path specified by PATH to find the directory containing file. Unlike  nor-
       mal  command search, however, the file searched for by the dot utility need not be executable. If no readable file is found, a non-interac-
       tive shell shall abort; an interactive shell shall write a diagnostic message to standard error, but this condition shall not be considered
       a syntax error.

OPTIONS

       None.

OPERANDS

       See the DESCRIPTION.

STDIN

       Not used.

INPUT FILES

       See the DESCRIPTION.

ENVIRONMENT VARIABLES

       See the DESCRIPTION.

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

       Returns the value of the last command executed, or a zero exit status if no command is executed.

CONSEQUENCES OF ERRORS

       Default.

       The following sections are informative.

APPLICATION USAGE

       None.

EXAMPLES

	      cat foobar
	      foo=hello bar=world. foobar
	      echo $foo $bar
	      hello world

RATIONALE

       Some older implementations searched the current directory for the file, even if the value of PATH disallowed it.  This behavior was omitted
       from this volume of IEEE Std 1003.1-2001 due to concerns about introducing the susceptibility to trojan horses that the user might be  try-
       ing to avoid by leaving dot out of PATH.

       The  KornShell  version	of dot takes optional arguments that are set to the positional parameters. This is a valid extension that allows a
       dot script to behave identically to a function.

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								   DOT(1P)