32v 1m test

TEST(1) UNIX Programmer's Manual TEST(1)

NAME

    test -  condition command

SYNOPSIS

    test expr

DESCRIPTION

    _t_e_s_t evaluates the expression _e_x_p_r, and if its value is true
    then returns zero exit status; otherwise, a non zero exit
    status is returned.  _t_e_s_t returns a non zero exit if there
    are no arguments.

    The following primitives are used to construct _e_x_p_r.

    -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 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 _f_i_l_d_e_s (1 by default) is associated with a ter-
             minal device.

    -z s1    true if the length of string _s_1 is zero.

    -n s1    true if the length of the string _s_1 is nonzero.

    s1 = s2  true if the strings _s_1 and _s_2 are equal.

    s1 != s2 true if the strings _s_1 and _s_2 are not equal.

    s1       true if _s_1 is not the null string.

    n1 -eq n2
             true if the integers _n_1 and _n_2 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 opera-
    tors:

    !    unary negation operator

    -a   binary _a_n_d operator

    -o   binary _o_r operator

    ( expr )
         parentheses for grouping.

    -a has higher precedence than -o. Notice that all the opera-
    tors and flags are separate arguments to _t_e_s_t.  Notice also
    that parentheses are meaningful to the Shell and must be
    escaped.

SEE ALSO

    sh(1), find(1)