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+.\" Copyright (c) 2001-2003 The Open Group, All Rights Reserved 
+.TH "DOT" 1P 2003 "IEEE/The Open Group" "POSIX Programmer's Manual"
+.\" dot 
+.SH PROLOG
+This manual page is part of the POSIX Programmer's Manual.
+The Linux implementation of this interface may differ (consult
+the corresponding Linux manual page for details of Linux behavior),
+or the interface may not be implemented on Linux.
+.SH NAME
+dot \- execute commands in the current environment
+.SH SYNOPSIS
+.LP
+\fB\&.\fP \fIfile\fP
+.SH DESCRIPTION
+.LP
+The shell shall execute commands from the \fIfile\fP in the current
+environment.
+.LP
+If \fIfile\fP does not contain a slash, the shell shall use the search
+path specified by \fIPATH\fP to find the directory
+containing \fIfile\fP. Unlike normal command search, however, the
+file searched for by the \fIdot\fP utility need not be
+executable. If no readable file is found, a non-interactive shell
+shall abort; an interactive shell shall write a diagnostic
+message to standard error, but this condition shall not be considered
+a syntax error.
+.SH OPTIONS
+.LP
+None.
+.SH OPERANDS
+.LP
+See the DESCRIPTION.
+.SH STDIN
+.LP
+Not used.
+.SH INPUT FILES
+.LP
+See the DESCRIPTION.
+.SH ENVIRONMENT VARIABLES
+.LP
+See the DESCRIPTION.
+.SH ASYNCHRONOUS EVENTS
+.LP
+Default.
+.SH STDOUT
+.LP
+Not used.
+.SH STDERR
+.LP
+The standard error shall be used only for diagnostic messages.
+.SH OUTPUT FILES
+.LP
+None.
+.SH EXTENDED DESCRIPTION
+.LP
+None.
+.SH EXIT STATUS
+.LP
+Returns the value of the last command executed, or a zero exit status
+if no command is executed.
+.SH CONSEQUENCES OF ERRORS
+.LP
+Default.
+.LP
+\fIThe following sections are informative.\fP
+.SH APPLICATION USAGE
+.LP
+None.
+.SH EXAMPLES
+.sp
+.RS
+.nf
+
+\fBcat foobar
+\fP\fBfoo=hello bar=world\fP\fB. foobar
+echo $foo $bar
+\fP\fBhello world\fP
+.fi
+.RE
+.SH RATIONALE
+.LP
+Some older implementations searched the current directory for the
+\fIfile\fP, even if the value of \fIPATH\fP 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 trying to avoid by leaving
+\fBdot\fP out of \fIPATH\fP. 
+.LP
+The KornShell version of \fIdot\fP takes optional arguments that are
+set to the positional parameters. This is a valid
+extension that allows a \fIdot\fP script to behave identically to
+a function.
+.SH FUTURE DIRECTIONS
+.LP
+None.
+.SH SEE ALSO
+.LP
+\fISpecial Built-In Utilities\fP
+.SH COPYRIGHT
+Portions of this text are reprinted and reproduced in electronic form
+from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
+-- 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 .