Интерактивная система просмотра системных руководств (man-ов)
pwd (1)
pwd (1) ( Solaris man: Команды и прикладные программы пользовательского уровня )
pwd (1) ( FreeBSD man: Команды и прикладные программы пользовательского уровня )
pwd (1) ( Русские man: Команды и прикладные программы пользовательского уровня )
pwd (1) ( Linux man: Команды и прикладные программы пользовательского уровня )
>> pwd (1) ( POSIX man: Команды и прикладные программы пользовательского уровня )
NAME
pwd - return working directory name
SYNOPSIS
pwd[-L | -P]
DESCRIPTION
The pwd utility shall write to standard output an absolute pathname
of the current working directory, which does not
contain the filenames dot or dot-dot.
OPTIONS
The pwd utility shall conform to the Base Definitions volume
of IEEE Std 1003.1-2001, Section 12.2, Utility Syntax Guidelines.
The following options shall be supported by the implementation:
-L
If the PWD environment variable contains an absolute pathname
of the current directory that does not contain the
filenames dot or dot-dot, pwd shall write this pathname to standard
output. Otherwise, the -L option shall behave as
the -P option.
-P
The absolute pathname written shall not contain filenames that, in
the context of the pathname, refer to files of type symbolic
link.
If both -L and -P are specified, the last one shall apply.
If neither -L nor -P is specified, the
pwd utility shall behave as if -L had been specified.
OPERANDS
None.
STDIN
Not used.
INPUT FILES
None.
ENVIRONMENT VARIABLES
The following environment variables shall affect the execution of
pwd:
LANG
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.)
LC_ALL
If set to a non-empty string value, override the values of all the
other internationalization variables.
LC_MESSAGES
Determine the locale that should be used to affect the format and
contents of diagnostic messages written to standard
error.
NLSPATH
Determine the location of message catalogs for the processing of LC_MESSAGES
.
PWD
If the -P 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 PWD , the behavior of pwd is
unspecified.
ASYNCHRONOUS EVENTS
Default.
STDOUT
The pwd utility output is an absolute pathname of the current
working directory:
"%s\n", <directory pathname>
STDERR
The standard error shall be used only for diagnostic messages.
OUTPUT FILES
None.
EXTENDED DESCRIPTION
None.
EXIT STATUS
The following exit values shall be returned:
0
Successful completion.
>0
An error occurred.
CONSEQUENCES OF ERRORS
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.
The following sections are informative.
APPLICATION USAGE
None.
EXAMPLES
None.
RATIONALE
Some implementations have historically provided pwd as a shell
special built-in command.
In most utilities, if an error occurs, partial output may be written
to standard output. This does not happen in historical
implementations of pwd. Because pwd 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.
FUTURE DIRECTIONS
None.
SEE ALSO
cd , the System Interfaces volume of IEEE Std 1003.1-2001,
getcwd()
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 .
