TEST(1)                                                   TEST(1)



     NAME
          test - condition evaluation command

     SYNOPSIS
          test expr
          [ expr ]

     DESCRIPTION
          test evaluates the expression expr and, if its value is
          true, 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 arguments.  When permissions are
          tested, the effective user ID of the process 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.

          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.

          -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



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     TEST(1)                                                   TEST(1)



                      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 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.

          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.

     SEE ALSO
          find(1), sh(1).

     WARNING
          If you test a file you own (the -r, -w, or -x tests), but
          the permission 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.

     ORIGIN
          AT&T V.3



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