mirror of https://github.com/mkerrisk/man-pages
104 lines
2.7 KiB
Groff
104 lines
2.7 KiB
Groff
.\" Copyright (c) 2001-2003 The Open Group, All Rights Reserved
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.TH "DOT" 1P 2003 "IEEE/The Open Group" "POSIX Programmer's Manual"
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.\" dot
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.SH NAME
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dot \- execute commands in the current environment
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.SH SYNOPSIS
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.LP
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\fB\&.\fP \fIfile\fP
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.SH DESCRIPTION
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.LP
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The shell shall execute commands from the \fIfile\fP in the current
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environment.
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.LP
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If \fIfile\fP does not contain a slash, the shell shall use the search
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path specified by \fIPATH\fP to find the directory
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containing \fIfile\fP. Unlike normal command search, however, the
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file searched for by the \fIdot\fP utility need not be
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executable. If no readable file is found, a non-interactive shell
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shall abort; an interactive shell shall write a diagnostic
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message to standard error, but this condition shall not be considered
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a syntax error.
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.SH OPTIONS
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.LP
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None.
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.SH OPERANDS
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.LP
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See the DESCRIPTION.
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.SH STDIN
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.LP
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Not used.
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.SH INPUT FILES
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.LP
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See the DESCRIPTION.
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.SH ENVIRONMENT VARIABLES
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.LP
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See the DESCRIPTION.
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.SH ASYNCHRONOUS EVENTS
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.LP
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Default.
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.SH STDOUT
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.LP
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Not used.
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.SH STDERR
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.LP
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The standard error shall be used only for diagnostic messages.
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.SH OUTPUT FILES
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.LP
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None.
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.SH EXTENDED DESCRIPTION
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.LP
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None.
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.SH EXIT STATUS
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.LP
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Returns the value of the last command executed, or a zero exit status
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if no command is executed.
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.SH CONSEQUENCES OF ERRORS
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.LP
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Default.
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.LP
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\fIThe following sections are informative.\fP
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.SH APPLICATION USAGE
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.LP
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None.
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.SH EXAMPLES
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.sp
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.RS
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.nf
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\fBcat foobar
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\fP\fBfoo=hello bar=world\fP\fB. foobar
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echo $foo $bar
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\fP\fBhello world\fP
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.fi
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.RE
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.SH RATIONALE
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.LP
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Some older implementations searched the current directory for the
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\fIfile\fP, even if the value of \fIPATH\fP disallowed it.
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This behavior was omitted from this volume of IEEE\ Std\ 1003.1-2001
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due to concerns about introducing the susceptibility
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to trojan horses that the user might be trying to avoid by leaving
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\fBdot\fP out of \fIPATH .\fP
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.LP
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The KornShell version of \fIdot\fP takes optional arguments that are
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set to the positional parameters. This is a valid
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extension that allows a \fIdot\fP script to behave identically to
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a function.
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.SH FUTURE DIRECTIONS
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.LP
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None.
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.SH SEE ALSO
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.LP
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\fISpecial Built-In Utilities\fP
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.SH COPYRIGHT
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Portions of this text are reprinted and reproduced in electronic form
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from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
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-- Portable Operating System Interface (POSIX), The Open Group Base
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Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of
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Electrical and Electronics Engineers, Inc and The Open Group. In the
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event of any discrepancy between this version and the original IEEE and
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The Open Group Standard, the original IEEE and The Open Group Standard
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is the referee document. The original Standard can be obtained online at
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http://www.opengroup.org/unix/online.html .
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