TR(1)                    DOMAIN/IX SYS5                     TR(1)



NAME
     tr - translate characters

USAGE
     tr [ -cds ] [ string1 [ string2 ] ]

DESCRIPTION
     Tr copies the standard input to the standard output after
     substituting or deleting selected characters.  Input charac-
     ters found in string1 are mapped into the corresponding
     characters of string2.  Any combination of the options
     listed below may be used.

     The following abbreviation conventions may be used to intro-
     duce ranges of characters or repeated characters into the
     strings:

     [a-z]     Stands for the string of characters with ASCII
               codes running from character a to character z
               inclusive.

     [a*n]     Stands for n repetitions of a. If the first digit
               of n is 0, n is considered octal; otherwise, n is
               considered decimal.  A zero or missing n is inter-
               preted as huge; this facility is useful for pad-
               ding string2.

     The backslash escape character (\) may be used as it is in
     the Shell to remove special meaning from any character in a
     string.  In addition, a backslash followed by 1, 2, or 3
     octal digits represents the character whose ASCII code is
     given by those digits.

OPTIONS
     -c        Complement the set of characters in string1 with
               respect to the universe of characters whose ASCII
               codes are 001 through 377 octal.

     -d        Delete all input characters in string1.

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

EXAMPLE
     The following example creates a list of all the words in
     file1 and places them one per line in file2, where a word is
     taken to be a maximal string of alphabetics.  The strings
     are quoted to protect the special characters from interpre-
     tation by the Shell; 012 is the ASCII code for newline.




Printed 12/4/86                                              TR-1

TR(1)                    DOMAIN/IX SYS5                     TR(1)



     # tr -cs ``[A-Z][a-z]'' ``[ 12*]'' <file1

CAUTIONS
     Tr cannot handle ASCII NUL in string1 or string2.  It always
     deletes NUL from input.

RELATED INFORMATION
     ed(1), sh(1), ascii(5).













































TR-2                                              Printed 12/4/86