tac - concatenate and print files in reverse
tac [-br] [-s separator] [-B] [-S bytes] [file...]
tac copies files or standard input to standard output with the order of records
reversed.
- -b
-
Attach separator to the beginning of the record that it precedes in the
file.
- -B
-
Read files in binary mode.
- -r
-
The separator is a regular expression.
- -s STRING
-
Use STRING as record separator. Set to
''
for paragraph mode. Defaults to newline.
- size
-
- -S BYTES
-
Number of bytes to read at a time. Defaults to 8192.
-
-B and -S are peculiar to this implementation of tac.
-
Regular expressions reek of camel. Here are a few constructs to watch out
for:
\A, \Z, \z anchors are not useful...
^ $ ...maybe with /m
() capturing parenthesis are not useful
| alternation may match out of sequence
Fuzzy | tgy@chocobo.org | Will hack
Perl for a moogle stuffy! =^.^=
Copyright (c) 1999 Moogle Stuffy, Inc. All rights reserved.
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You may otherwise play with this software in accordance with Perl's
Artistic License.