trbsd(1)trbsd(1)NAMEtrbsd - Translates characters
SYNOPSIStrbsd [-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
Translates on a byte-by-byte basis. When you specify this option,
trbsd does not support extended characters. 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 char‐
acters if you do not specify -A. Deletes all characters in string1
from output. Changes characters that are repeated output characters in
string2 into single characters.
DESCRIPTION
Input characters from string1 are replaced with the corresponding char‐
acters 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
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. To translate lowercase ASCII char‐
acters to uppercase, enter: trbsd a-z A-Z <textfile >newfile 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. To translate each string of digits to a
single # (number sign), enter: trbsd-s 0-9 # <textfile >newfile
To translate all ASCII characters that are not specified, enter:
trbsd-c ' -~' 'A-_' <textfile >newfile
This translates each nonprinting ASCII character to the corre‐
sponding 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)trbsd(1)
