TR(1-SysV)          RISC/os Reference Manual           TR(1-SysV)



NAME
     tr - translate characters

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

DESCRIPTION
     tr copies the standard input to the standard output with
     substitution or deletion of selected characters.  Input
     characters found in string1 are mapped into the correspond-
     ing characters of string2.

OPTIONS
     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 001
                         through 377 octal.

     -d                  Deletes all input characters in string1.

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

     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 whose ASCII
             codes run 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
             taken to be decimal.  A zero or missing n is taken
             to be huge; this facility is useful for padding
             string2.

     The escape character \ may be used as in the shell to remove
     special meaning from any character in a string.  In addi-
     tion, \ followed by 1, 2, or 3 octal digits stands for the
     character whose ASCII code is given by those digits.

EXAMPLE
     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 strings are quoted to
     protect the special characters from interpretation by the
     shell; 012 is the ASCII code for newline.




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TR(1-SysV)          RISC/os Reference Manual           TR(1-SysV)



             tr -cs "[A-Z][a-z]" "[\012*]" <file1 >file2

SEE ALSO
     ed(1), sh(1).
     ascii(5) in the Programmer's Reference Manual.

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














































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