Copyright (c) 1996 Sun Microsystems, Inc - All Rights Reserved.
The contents of this file are subject to the terms of the Common Development and Distribution License (the "License"). You may not use this file except in compliance with the License.
You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE or http://www.opensolaris.org/os/licensing. See the License for the specific language governing permissions and limitations under the License.
When distributing Covered Code, include this CDDL HEADER in each file and include the License file at usr/src/OPENSOLARIS.LICENSE. If applicable, add the following below this CDDL HEADER, with the fields enclosed by brackets "[]" replaced with your own identifying information: Portions Copyright [yyyy] [name of copyright owner]
/usr/ucb/test expression
expression
test evaluates the expression expression and, if its value is true, sets 0 (true) exit status; otherwise, a non-zero (false) exit status is set. test also sets a non-zero exit status if there are no arguments. When permissions are tested, the effective user ID of the process is used.
All operators, flags, and brackets (brackets used as shown in the second SYNOPSIS line) must be separate arguments to the test command; normally these items are separated by spaces.
The following primitives are used to construct expression:
-r filename
True if filename exists and is readable.
-w filename
True if filename exists and is writable.
-x filename
True if filename exists and is executable.
-f filename
True if filename exists and is a regular file. Alternatively, if /usr/bin/sh users specify /usr/ucb before /usr/bin in their PATH environment variable, then test will return true if filename exists and is (not-a-directory). This is also the default for /usr/bin/csh users.
-d filename
True if filename exists and is a directory.
-c filename
True if filename exists and is a character special file.
-b filename
True if filename exists and is a block special file.
-p filename
True if filename exists and is a named pipe (fifo).
-u filename
True if filename exists and its set-user- ID bit is set.
-g filename
True if filename exists and its set-group- ID bit is set.
-k filename
True if filename exists and its sticky bit is set.
-s filename
True if filename exists and has a size greater than zero.
-t[ fildes ]
True if the open file whose file descriptor number is fildes (1 by default) is associated with a terminal device.
-z s1
True if the length of string s1 is zero.
-n s1
True if the length of the string s1 is non-zero.
s1 = s2
True if strings s1 and s2 are identical.
s1 != s2
True if strings s1 and s2 are not identical.
s1
True if s1 is not the null string.
n1 -eq n2
True if the integers n1 and n2 are algebraically equal. Any of the comparisons -ne, -gt, -ge, -lt, and -le may be used in place of -eq.
These primaries may be combined with the following operators:
!
Unary negation operator.
-a
Binary and operator.
-o
Binary or operator (-a has higher precedence than -o).
(expression)
Parentheses for grouping. Notice also that parentheses are meaningful to the shell and, therefore, must be quoted.
find(1), sh(1), attributes(5)
The not-a-directory alternative to the -f option is a transition aid for BSD applications and may not be supported in future releases.
If you test a file you own (the -r , -w , or -x tests), but the permission tested does not have the owner bit set, a non-zero (false) exit status will be returned even though the file may have the group or other bit set for that permission. The correct exit status will be set if you are super-user.
The = and != operators have a higher precedence than the -r through -n operators, and = and != always expect arguments; therefore, = and != cannot be used with the -r through -n operators.
If more than one argument follows the -r through -n operators, only the first argument is examined; the others are ignored, unless a -a or a -o is the second argument.