1130b656e5
This will make a number of things easier in the future, as well as (finally!) avoiding the Id-smashing problem which has plagued developers for so long. Boy, I'm glad we're not using sup anymore. This update would have been insane otherwise.
257 lines
5.9 KiB
Groff
257 lines
5.9 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
|
|
.\" $FreeBSD$
|
|
.\"
|
|
.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 test
|
|
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 test
|
|
utility.
|
|
.Pp
|
|
The following primaries are used to construct expression:
|
|
.Bl -tag -width Ar
|
|
.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 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 test
|
|
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 test
|
|
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 STANDARDS
|
|
The
|
|
.Nm test
|
|
function is expected to be
|
|
.St -p1003.2
|
|
compatible.
|