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trbsd(1)
NAME
  trbsd - Translates characters

SYNOPSIS
  trbsd [-Acs] string1 string2

  trbsd -d  [-Ac] string1

  The trbsd command copies characters from the standard input to the standard
  output with substitution or deletion of selected characters.

OPTIONS
  -A  Translates on a byte-by-byte basis.  When you specify this option,
      trbsd does not support extended characters.

  -c  Complements (inverts) the set of characters in string1 with respect to
      the universe of characters whose codes are 001 through 377 octal if you
      specify -A, and all characters if you do not specify -A.

  -d  Deletes all characters in string1 from output.

  -s  Changes characters that are repeated output characters in string2 into
      single characters.

DESCRIPTION
  Input characters from string1 are replaced with the corresponding
  characters in string2. The trbsd command cannot handle an ASCII NUL (\000)
  in string1 or string2; it always deletes NUL from the input.

  The tr command is a System V compatible version of trbsd.

  Abbreviations such as a-z, standing for a string of characters whose ASCII
  codes run from character a to character z, inclusive, can be used to
  introduce ranges of characters.  Note that brackets are not special
  characters.

  Use the escape character \ (backslash) to remove the special meaning from
  any character in a string.  Use the \ followed by 1, 2, or 3 octal digits
  for the code of a character.

  If a given character appears more than once in string1, the character in
  string2 corresponding to its last appearance in string1 will be used in the
  translation.

EXAMPLES
   1.  To translate braces into parentheses, enter:
	    trbsd '{}' '()' <textfile >newfile

       This translates each { (left brace) to a ( (left parenthesis) and each
       } (right brace) to a ) (right parenthesis).  All other characters
       remain unchanged.

   2.  To translate lowercase ASCII characters to uppercase, enter:
	    trbsd a-z A-Z <textfile >newfile

   3.  The two strings can be of different lengths:
	    trbsd 0-9 # <textfile >newfile

       This translates each digit to a # (number sign); if string2 is too
       short, it is padded to the length of string1 by duplicating its last
       character.

   4.  To translate each string of digits to a single # (number sign), enter:
	    trbsd -s 0-9 # <textfile >newfile

   5.  To translate all ASCII characters that are not specified, enter:
	    trbsd -c ' -~' 'A-_' <textfile >newfile

       This translates each nonprinting ASCII character to the corresponding
       control key letter (\001 translates to A, \002 to B, and so on).
       ASCII DEL (\177), the character that follows ~ (tilde), translates to
       a ? (question mark).

SEE ALSO
  Commands:  ed(1), sh(1), tr(1)

  Files:  ascii(5)

Index for Section 1

Alphabetical listing for T

Top of page