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- .th TR I 5/20/74
- .sh NAME
- tr \*- transliterate
- .sh SYNOPSIS
- .bd tr
- [
- .bd \*-cds
- ] [ string1 [ string2 ] ]
- .sh DESCRIPTION
- .it Tr
- copies the standard input to the standard output with
- substitution or deletion of selected characters.
- Input characters found in
- .it string1
- are mapped into the corresponding characters of
- .it string2.
- Any combination of the options
- .bd \*-cds
- may be used.
- .bd \*-c
- complements the set of characters in
- .it string1
- with respect to the universe of characters
- whose ascii codes are 001 through 377 octal.
- .bd \*-d
- deletes all input characters in
- .it string1.
- .bd \*-s
- squeezes all strings of repeated output characters that are
- in
- .it string2
- to single characters.
- .s3
- The following abbreviation conventions may be used
- to introduce ranges of characters or repeated characters into
- the strings:
- .s3
- \fB[\fIa\*|\fB\*-\fIb\fB\*|]\fR
- stands for the string of characters whose ascii codes run
- from character
- .it a
- to character
- .it b.
- .s3
- \fB[\fIa\fB\*|*\fIn\fB\*|]\fR,
- where
- .it n
- is an integer or empty, stands for \fIn\fR-fold
- repetition of character
- .it a.
- .it n
- is taken to be octal or decimal according as its
- first digit is or is not zero.
- A zero or missing
- .it n
- is taken to be huge;
- this facility is useful for padding
- .it string2.
- .s3
- The escape character `\\' may be used as in
- .it sh
- to remove special meaning from any character in a string.
- In addition,
- `\\' followed by 1, 2 or 3 octal digits stands for the
- character whose ascii code is given by those digits.
- .s3
- 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.
- .s3
- .ti +8
- tr \*-cs "[A\*-Z][a\*-z]" "[\\012*]" <file1 >file2
- .sh "SEE ALSO"
- sh (I), ed (I), ascii (V)
- .sh BUGS
- Won't handle ascii NUL in
- .it string1
- or
- .it string2;
- always deletes NUL from input.
-