test(1-ucb) (BSD Compatibility Package) test(1-ucb)
NAME
test - condition evaluation command
SYNOPSIS
/usr/ucb/test expr
[expr]
DESCRIPTION
test evaluates the expression expr and, if its value is true, it sets
a zero (true) exit status; otherwise, a non-zero (false) exit status
is set; test also sets a non-zero exit status if there are no argu-
ments. When permissions are tested, the effective user ID of the pro-
cess 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.
OPTIONS
The following primitives are used to construct expr:
-r file True if file exists and is readable.
-w file True if file exists and is writable.
-x file True if file exists and is executable.
-f file True if file 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 file exists and is not a directory. This is also
the default for /usr/bin/csh users.
-d file True if file exists and is a directory.
-c file True if file exists and is a character special file.
-b file True if file exists and is a block special file.
-p file True if file exists and is a named pipe (FIFO).
-u file True if file exists and its set-user-ID bit is set.
-g file True if file exists and its set-group-ID bit is set.
-k file True if file exists and its sticky bit is set.
-s file True if file 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.
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test(1-ucb) (BSD Compatibility Package) test(1-ucb)
-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.
-L file True if file exists and is a symbolic link. With all other
primitives, the symbolic links are followed by default.
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).
(expr) Parentheses for grouping. Notice also that parentheses are
meaningful to the shell and, therefore, must be quoted.
NOTES
The not-a-directory alternative to the -f option is a transition aid
for BSD applications and may not be supported in future releases.
The -L option is a migration aid for users of other shells which have
similar options and may not be supported in future releases.
If you test a file you own (the -r, -w, or -x tests), but the permis-
sion 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.
SEE ALSO
find(1), sh(1).
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