265 lines
6.0 KiB
Groff
265 lines
6.0 KiB
Groff
.\" Copyright (c) 1991, 1993
|
|
.\" The Regents of the University of California. All rights reserved.
|
|
.\"
|
|
.\" This code is derived from software contributed to Berkeley by
|
|
.\" the Institute of Electrical and Electronics Engineers, Inc.
|
|
.\"
|
|
.\" Redistribution and use in source and binary forms, with or without
|
|
.\" modification, are permitted provided that the following conditions
|
|
.\" are met:
|
|
.\" 1. Redistributions of source code must retain the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer.
|
|
.\" 2. Redistributions in binary form must reproduce the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer in the
|
|
.\" documentation and/or other materials provided with the distribution.
|
|
.\" 3. All advertising materials mentioning features or use of this software
|
|
.\" must display the following acknowledgement:
|
|
.\" This product includes software developed by the University of
|
|
.\" California, Berkeley and its contributors.
|
|
.\" 4. Neither the name of the University nor the names of its contributors
|
|
.\" may be used to endorse or promote products derived from this software
|
|
.\" without specific prior written permission.
|
|
.\"
|
|
.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
.\" SUCH DAMAGE.
|
|
.\"
|
|
.\" @(#)test.1 8.1 (Berkeley) 5/31/93
|
|
.\" $Id: test.1,v 1.7 1998/09/07 16:59:05 cracauer Exp $
|
|
.\"
|
|
.Dd May 31, 1993
|
|
.Dt TEST 1
|
|
.Os
|
|
.Sh NAME
|
|
.Nm test
|
|
.Nd condition evaluation utility
|
|
.Sh SYNOPSIS
|
|
.Nm test
|
|
.Ar expression
|
|
.Sh DESCRIPTION
|
|
The
|
|
.Nm
|
|
utility evaluates the expression and, if it evaluates
|
|
to true, returns a zero (true) exit status; otherwise
|
|
it returns 1 (false).
|
|
If there is no expression, test also
|
|
returns 1 (false).
|
|
.Pp
|
|
All operators and flags are separate arguments to the
|
|
.Nm
|
|
utility.
|
|
.Pp
|
|
The following primaries are used to construct expression:
|
|
.Bl -tag -width indent
|
|
.It Fl b Ar file
|
|
True if
|
|
.Ar file
|
|
exists and is a block special
|
|
file.
|
|
.It Fl c Ar file
|
|
True if
|
|
.Ar file
|
|
exists and is a character
|
|
special file.
|
|
.It Fl d Ar file
|
|
True if
|
|
.Ar file
|
|
exists and is a directory.
|
|
.It Fl e Ar file
|
|
True if
|
|
.Ar file
|
|
exists (regardless of type).
|
|
.It Fl f Ar file
|
|
True if
|
|
.Ar file
|
|
exists and is a regular file.
|
|
.It Fl g Ar file
|
|
True if
|
|
.Ar file
|
|
exists and its set group ID flag
|
|
is set.
|
|
.It Fl h Ar file
|
|
True if
|
|
.Ar file
|
|
exists and is a symbolic link.
|
|
.It Fl n Ar string
|
|
True if the length of
|
|
.Ar string
|
|
is nonzero.
|
|
.It Fl p Ar file
|
|
True if
|
|
.Ar file
|
|
is a named pipe
|
|
.Po Tn FIFO Pc .
|
|
.It Fl S Ar file
|
|
True if
|
|
.Ar file
|
|
is a socket.
|
|
.It Fl r Ar file
|
|
True if
|
|
.Ar file
|
|
exists and is readable.
|
|
.It Fl s Ar file
|
|
True if
|
|
.Ar file
|
|
exists and has a size greater
|
|
than zero.
|
|
.It Fl t Ar [file_descriptor]
|
|
True if the file whose file descriptor number
|
|
is
|
|
.Ar file_descriptor
|
|
(default 1) is open and is
|
|
associated with a terminal.
|
|
.It Fl u Ar file
|
|
True if
|
|
.Ar file
|
|
exists and its set user ID flag
|
|
is set.
|
|
.It Fl w Ar file
|
|
True if
|
|
.Ar file
|
|
exists and is writable.
|
|
True
|
|
indicates only that the write flag is on.
|
|
The file is not writable on a read-only file
|
|
system even if this test indicates true.
|
|
.It Fl x Ar file
|
|
True if
|
|
.Ar file
|
|
exists and is executable.
|
|
True
|
|
indicates only that the execute flag is on.
|
|
If
|
|
.Ar file
|
|
is a directory, true indicates that
|
|
.Ar file
|
|
can be searched.
|
|
.It Fl z Ar string
|
|
True if the length of
|
|
.Ar string
|
|
is zero.
|
|
.It Ar string
|
|
True if
|
|
.Ar string
|
|
is not the null
|
|
string.
|
|
.It Ar \&s\&1 Cm \&= Ar \&s\&2
|
|
True if the strings
|
|
.Ar \&s\&1
|
|
and
|
|
.Ar \&s\&2
|
|
are identical.
|
|
.It Ar \&s\&1 Cm \&!= Ar \&s\&2
|
|
True if the strings
|
|
.Ar \&s\&1
|
|
and
|
|
.Ar \&s\&2
|
|
are not identical.
|
|
.It Ar \&n\&1 Fl \&eq Ar \&n\&2
|
|
True if the integers
|
|
.Ar \&n\&1
|
|
and
|
|
.Ar \&n\&2
|
|
are algebraically
|
|
equal.
|
|
.It Ar \&n\&1 Fl \&ne Ar \&n\&2
|
|
True if the integers
|
|
.Ar \&n\&1
|
|
and
|
|
.Ar \&n\&2
|
|
are not
|
|
algebraically equal.
|
|
.It Ar \&n\&1 Fl \> Ar \&n\&2
|
|
True if the integer
|
|
.Ar \&n\&1
|
|
is algebraically
|
|
greater than the integer
|
|
.Ar \&n\&2 .
|
|
.It Ar \&n\&1 Fl \&ge Ar \&n\&2
|
|
True if the integer
|
|
.Ar \&n\&1
|
|
is algebraically
|
|
greater than or equal to the integer
|
|
.Ar \&n\&2 .
|
|
.It Ar \&n\&1 Fl \< Ar \&n\&2
|
|
True if the integer
|
|
.Ar \&n\&1
|
|
is algebraically less
|
|
than the integer
|
|
.Ar \&n\&2 .
|
|
.It Ar \&n\&1 Fl \&le Ar \&n\&2
|
|
True if the integer
|
|
.Ar \&n\&1
|
|
is algebraically less
|
|
than or equal to the integer
|
|
.Ar \&n\&2 .
|
|
.El
|
|
.Pp
|
|
These primaries can be combined with the following operators:
|
|
.Bl -tag -width Ar
|
|
.It Cm \&! Ar expression
|
|
True if
|
|
.Ar expression
|
|
is false.
|
|
.It Ar expression1 Fl a Ar expression2
|
|
True if both
|
|
.Ar expression1
|
|
and
|
|
.Ar expression2
|
|
are true.
|
|
.It Ar expression1 Fl o Ar expression2
|
|
True if either
|
|
.Ar expression1
|
|
or
|
|
.Ar expression2
|
|
are true.
|
|
.It Cm \&( Ns Ar expression Ns Cm \&)
|
|
True if expression is true.
|
|
.El
|
|
.Pp
|
|
The
|
|
.Fl a
|
|
operator has higher precedence than the
|
|
.Fl o
|
|
operator.
|
|
.Sh GRAMMAR AMBIGUITY
|
|
The
|
|
.Nm
|
|
grammar is inherently ambiguous. In order to assure a degree of consistency,
|
|
the cases described in the
|
|
.St -p1003.2 ,
|
|
section D11.2/4.62.4, standard
|
|
are evaluated consistently according to the rules specified in the
|
|
standards document. All other cases are subject to the ambiguity in the
|
|
command semantics.
|
|
.Sh RETURN VALUES
|
|
The
|
|
.Nm
|
|
utility exits with one of the following values:
|
|
.Bl -tag -width Ds
|
|
.It 0
|
|
expression evaluated to true.
|
|
.It 1
|
|
expression evaluated to false or expression was
|
|
missing.
|
|
.It >1
|
|
An error occurred.
|
|
.El
|
|
.Sh SEE ALSO
|
|
.Xr expr 1 ,
|
|
.Xr sh 1
|
|
.Sh STANDARDS
|
|
The
|
|
.Nm
|
|
function is expected to be
|
|
.St -p1003.2
|
|
compatible.
|