Manual page for TEST(1)
test - condition command
SYNOPSIS
test
expr
DESCRIPTION
test
evaluates the expression
expr,
and if its value is true then returns zero exit status; otherwise, a
nonzero exit status is returned.
test
returns a nonzero exit if there are no arguments.
The following primitives are used to construct
expr.
- -r file
-
true if the file exists and is readable.
- -w file
-
true if the file exists and is writable.
- -f file
-
true if the file exists and is not a directory.
- -d file
-
true if the file exists and is a directory.
- -s file
-
true if the file exists and has a size greater than zero.
- -b file
-
true if the file exists and is a block special device.
- -c file
-
true if the file exists and is a character special device.
- -h file
-
true if the file exists and is a symbolic link.
- -g file
-
true if the file exists and has setgid bit set.
- -k file
-
true if the file exists and has sticky bit set.
- -u file
-
true if the file exists and has setuid bit set.
- -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 the string
s1
is zero.
- -n s1
-
true if the length of the string
s1
is nonzero.
- s1 = s2
-
true
if the strings
s1
and
s2
are equal.
- s1 != s2
-
true
if the strings
s1
and
s2
are not equal.
- 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,
or
-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
- ( expr )
-
parentheses for grouping.
-a
has higher precedence than
-o.
Notice that all the operators and flags are separate
arguments to
test.
Notice also that parentheses are meaningful
to the Shell and must be escaped.
SEE ALSO
sh(1), find(1)
Created by unroff & hp-tools.
© somebody (See intro for details). All Rights Reserved.
Last modified 11/5/97
