test(1) [minix man page]

TEST(1) 						      General Commands Manual							   TEST(1)

NAME

       test, [ - test for a condition

SYNOPSIS

       test expr
       [ expr ]

OPTIONS

       (none)

EXAMPLES

       test -r file	   # See if file is readable

DESCRIPTION

       Test checks to see if files exist, are readable, etc. and returns an exit status of zero if true and nonzero if false.  The legal operators
       are

	    -r file   true if the file is readable
	    -w file   true if the file is writable
	    -x file   true if the file is executable
	    -f file   true if the file is not a directory
	    -d file   true if the file is a directory
	    -s file   true if the file exists and has a size > 0
	    -t fd     true if file descriptor fd (default 1) is a terminal
	    -z s      true if the string s has zero length
	    -n s      true if the string s has nonzero length
	    s1 = s2   true if the strings s1 and s2 are identical
	    s1 != s2  true if the strings s1 and s2 are different
	    m -eq m   true if the integers m and n are numerically equal
       The operators -gt, -ge, -ne, -le, and -lt may be used as well.  These operands may be combined with -a (Boolean and), -o  (Boolean  or),  !
       (negation).  The priority of -a is higher than that of -o.  Parentheses are permitted, but must be escaped to keep the shell from trying to
       interpret them.

SEE ALSO

       expr(1), sh(1).

																	   TEST(1)

TEST(1) 						      General Commands Manual							   TEST(1)

NAME

       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 non zero exit status is returned.
       test returns a non zero 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.

       -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 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)

																	   TEST(1)