mirror of https://github.com/mkerrisk/man-pages
157 lines
4.5 KiB
Groff
157 lines
4.5 KiB
Groff
.\" Copyright (c) 2001-2003 The Open Group, All Rights Reserved
|
|
.TH "PWD" 1P 2003 "IEEE/The Open Group" "POSIX Programmer's Manual"
|
|
.\" pwd
|
|
.SH NAME
|
|
pwd \- return working directory name
|
|
.SH SYNOPSIS
|
|
.LP
|
|
\fBpwd\fP \fB[\fP\fB-L | -P\fP \fB]\fP
|
|
.SH DESCRIPTION
|
|
.LP
|
|
The \fIpwd\fP utility shall write to standard output an absolute pathname
|
|
of the current working directory, which does not
|
|
contain the filenames dot or dot-dot.
|
|
.SH OPTIONS
|
|
.LP
|
|
The \fIpwd\fP utility shall conform to the Base Definitions volume
|
|
of IEEE\ Std\ 1003.1-2001, Section 12.2, Utility Syntax Guidelines.
|
|
.LP
|
|
The following options shall be supported by the implementation:
|
|
.TP 7
|
|
\fB-L\fP
|
|
If the \fIPWD\fP environment variable contains an absolute pathname
|
|
of the current directory that does not contain the
|
|
filenames dot or dot-dot, \fIpwd\fP shall write this pathname to standard
|
|
output. Otherwise, the \fB-L\fP option shall behave as
|
|
the \fB-P\fP option.
|
|
.TP 7
|
|
\fB-P\fP
|
|
The absolute pathname written shall not contain filenames that, in
|
|
the context of the pathname, refer to files of type symbolic
|
|
link.
|
|
.sp
|
|
.LP
|
|
If both \fB-L\fP and \fB-P\fP are specified, the last one shall apply.
|
|
If neither \fB-L\fP nor \fB-P\fP is specified, the
|
|
\fIpwd\fP utility shall behave as if \fB-L\fP had been specified.
|
|
.SH OPERANDS
|
|
.LP
|
|
None.
|
|
.SH STDIN
|
|
.LP
|
|
Not used.
|
|
.SH INPUT FILES
|
|
.LP
|
|
None.
|
|
.SH ENVIRONMENT VARIABLES
|
|
.LP
|
|
The following environment variables shall affect the execution of
|
|
\fIpwd\fP:
|
|
.TP 7
|
|
\fILANG\fP
|
|
Provide a default value for the internationalization variables that
|
|
are unset or null. (See the Base Definitions volume of
|
|
IEEE\ Std\ 1003.1-2001, Section 8.2, Internationalization Variables
|
|
for
|
|
the precedence of internationalization variables used to determine
|
|
the values of locale categories.)
|
|
.TP 7
|
|
\fILC_ALL\fP
|
|
If set to a non-empty string value, override the values of all the
|
|
other internationalization variables.
|
|
.TP 7
|
|
\fILC_MESSAGES\fP
|
|
Determine the locale that should be used to affect the format and
|
|
contents of diagnostic messages written to standard
|
|
error.
|
|
.TP 7
|
|
\fINLSPATH\fP
|
|
Determine the location of message catalogs for the processing of \fILC_MESSAGES
|
|
\&.\fP
|
|
.TP 7
|
|
\fIPWD\fP
|
|
If the \fB-P\fP option is in effect, this variable shall be set to
|
|
an absolute pathname of the current working directory that
|
|
does not contain any components that specify symbolic links, does
|
|
not contain any components that are dot, and does not contain any
|
|
components that are dot-dot. If an application sets or unsets the
|
|
value of \fIPWD ,\fP the behavior of \fIpwd\fP is
|
|
unspecified.
|
|
.sp
|
|
.SH ASYNCHRONOUS EVENTS
|
|
.LP
|
|
Default.
|
|
.SH STDOUT
|
|
.LP
|
|
The \fIpwd\fP utility output is an absolute pathname of the current
|
|
working directory:
|
|
.sp
|
|
.RS
|
|
.nf
|
|
|
|
\fB"%s\\n", <\fP\fIdirectory pathname\fP\fB>
|
|
\fP
|
|
.fi
|
|
.RE
|
|
.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
|
|
The following exit values shall be returned:
|
|
.TP 7
|
|
\ 0
|
|
Successful completion.
|
|
.TP 7
|
|
>0
|
|
An error occurred.
|
|
.sp
|
|
.SH CONSEQUENCES OF ERRORS
|
|
.LP
|
|
If an error is detected, output shall not be written to standard output,
|
|
a diagnostic message shall be written to standard
|
|
error, and the exit status is not zero.
|
|
.LP
|
|
\fIThe following sections are informative.\fP
|
|
.SH APPLICATION USAGE
|
|
.LP
|
|
None.
|
|
.SH EXAMPLES
|
|
.LP
|
|
None.
|
|
.SH RATIONALE
|
|
.LP
|
|
Some implementations have historically provided \fIpwd\fP as a shell
|
|
special built-in command.
|
|
.LP
|
|
In most utilities, if an error occurs, partial output may be written
|
|
to standard output. This does not happen in historical
|
|
implementations of \fIpwd\fP. Because \fIpwd\fP is frequently used
|
|
in historical shell scripts without checking the exit status,
|
|
it is important that the historical behavior is required here; therefore,
|
|
the CONSEQUENCES OF ERRORS section specifically disallows
|
|
any partial output being written to standard output.
|
|
.SH FUTURE DIRECTIONS
|
|
.LP
|
|
None.
|
|
.SH SEE ALSO
|
|
.LP
|
|
\fIcd\fP , the System Interfaces volume of IEEE\ Std\ 1003.1-2001,
|
|
\fIgetcwd\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 .
|