tr - translate characters


     /usr/ucb/tr [-cds] [ string1 [string2]]


     The tr utility copies the standard  input  to  the  standard
     output with substitution or deletion of selected characters.
     The arguments string1 and string2  are  considered  sets  of
     characters.  Any  input character found in string1 is mapped
     into the character  in  the  corresponding  position  within
     string2.  When  string2 is short, it is padded to the length
     of string1 by duplicating its last character.

     In either string the notation:


     denotes 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.  As  with  the shell, the escape character \,
     followed by any other character, escapes any special meaning
     for that character.


     Any combination of the options -c, -d, or -s may be used:

     -c    Complement the  set  of  characters  in  string1  with
           respect  to  the  universe  of  characters whose ASCII
           codes are 01 through 0377 octal.

     -d    Delete all input characters in string1.

     -s    Squeeze all strings of repeated output characters that
           are in string2 to single characters.


     Example 1: Creating a list of all the words in a filename

     The following example creates a list of  all  the  words  in
     filename1, one per line, in filename2, 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.

     example% tr -cs A-Za-z '\012' <filename1>filename2


     See attributes(5) for descriptions of the  following  attri-

    |       ATTRIBUTE TYPE        |       ATTRIBUTE VALUE       |
    | Availability                | SUNWscpu                    |


     ed(1), ascii(5), attributes(5)


     Will not handle ASCII NUL in string1 or string2.  tr  always
     deletes NUL from input.

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