[unix-history] / usr / man / man1 / tr.1

.TH TR 1 
.SH NAME
tr \- translate characters
.SH SYNOPSIS
.B tr
[
.B \-cds
] [ string1 [ string2 ] ]
.SH DESCRIPTION
.I Tr
copies the standard input to the standard output with 
substitution or deletion of selected characters.
Input characters found in 
.I string1
are mapped into the corresponding characters of
.IR string2 .
When 
.I string2
is short it is padded to the length of 
.I string1
by duplicating its last character.
Any combination of the options
.B \-cds
may be used:
.B \-c
complements the set of characters in
.I string1
with respect to the universe of characters
whose ASCII codes are 01 through 0377 octal;
.B \-d
deletes all input characters in
.I string1;
.B \-s
squeezes all strings of repeated output characters that are
in 
.I string2
to single characters.
.PP
In either string the notation
.IB a \- b
means a range of characters from
.I a
to
.I b
in increasing ASCII order.
The character
`\e' followed by 1, 2 or 3 octal digits stands for the
character whose ASCII code is given by those digits.
A `\e' followed by any other character stands
for that character.
.PP
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 second string is quoted
to protect `\e' from the Shell.
012 is the ASCII code for newline.
.IP
tr \-cs A\-Za\-z \'\e012\' <file1 >file2
.SH "SEE ALSO"
ed(1), ascii(7)
.SH BUGS
Won't handle ASCII NUL in
.I string1
or
.I string2;
always deletes NUL from input.
Commit	Line	Data
e6817382 BJ	1	.TH TR 1
	2	.SH NAME
	3	tr \- translate characters
	4	.SH SYNOPSIS
	5	.B tr
	6	[
	7	.B \-cds
	8	] [ string1 [ string2 ] ]
	9	.SH DESCRIPTION
	10	.I Tr
	11	copies the standard input to the standard output with
	12	substitution or deletion of selected characters.
	13	Input characters found in
	14	.I string1
	15	are mapped into the corresponding characters of
	16	.IR string2 .
	17	When
	18	.I string2
	19	is short it is padded to the length of
	20	.I string1
	21	by duplicating its last character.
	22	Any combination of the options
	23	.B \-cds
	24	may be used:
	25	.B \-c
	26	complements the set of characters in
	27	.I string1
	28	with respect to the universe of characters
	29	whose ASCII codes are 01 through 0377 octal;
	30	.B \-d
	31	deletes all input characters in
	32	.I string1;
	33	.B \-s
	34	squeezes all strings of repeated output characters that are
	35	in
	36	.I string2
	37	to single characters.
	38	.PP
	39	In either string the notation
	40	.IB a \- b
	41	means a range of characters from
	42	.I a
	43	to
	44	.I b
	45	in increasing ASCII order.
	46	The character
	47	`\e' followed by 1, 2 or 3 octal digits stands for the
	48	character whose ASCII code is given by those digits.
	49	A `\e' followed by any other character stands
	50	for that character.
	51	.PP
	52	The following example creates a list of all
	53	the words in `file1' one per line in `file2',
	54	where a word is taken to be a maximal string of alphabetics.
	55	The second string is quoted
	56	to protect `\e' from the Shell.
	57	012 is the ASCII code for newline.
	58	.IP
	59	tr \-cs A\-Za\-z \'\e012\' <file1 >file2
	60	.SH "SEE ALSO"
	61	ed(1), ascii(7)
	62	.SH BUGS
	63	Won't handle ASCII NUL in
	64	.I string1
65	or
66	.I string2;
67	always deletes NUL from input.