TEST(1)                 GENIX Programmer's 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 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.



      Printed 11/16/83                                                        1

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



           -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)

















































      Printed 11/16/83                                                        2