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



      NAME
           tr - translate characters

      SYNOPSIS
           tr [ -cds ] [ string1 [ string2 ] ]

      DESCRIPTION
           Tr copies the standard input to the standard output  with  substitu-
           tion  or deletion of selected characters.  Input characters found in
           string1 are mapped into the  corresponding  characters  of  string2.
           When  string2  is  short  it  is  padded to the length of string1 by
           duplicating its last character.  Any combination of the options -cds
           may  be  used:  -c complements the set of characters in string1 with
           respect to the universe of  characters  whose  ASCII  codes  are  01
           through  0377  octal; -d deletes all input characters in string1; -s
           squeezes all strings of  repeated  output  characters  that  are  in
           string2 to single characters.

           In either string the notation a-b means a range of characters from a
           to  b in increasing ASCII order.  The character `\' followed by 1, 2
           or 3 octal digits stands for the character whose ASCII code is given
           by  those  digits.  A `\' followed by any other character stands for
           that character.

           The following example creates a list of all the words in `file1' one
           per line in `file2', where a word is taken to be a maximal string of
           alphabetics.  The second string is quoted to protect  `\'  from  the
           Shell.  012 is the ASCII code for newline.

                tr -cs A-Za-z '\012' <file1 >file2

      SEE ALSO
           ed(1), ascii(7), expand(1)

      BUGS
           Won't handle ASCII NUL in string1 or  string2;  always  deletes  NUL
           from input.


















      Printed 11/16/83                                                        1