From d57ebc45ba4c59cc6f8bb0e9a435ecbddc84b982 Mon Sep 17 00:00:00 2001 From: Paul Eggert Date: Fri, 1 Feb 2013 13:32:48 -0800 Subject: [PATCH] doc: say how to tac char-by-char This fixes Bug#12115, reported by Reuben Thomas. * doc/coreutils.texi (tac invocation): Document how to reverse a file character by character. Break out MS-DOS into a separate section, like 'cat' does. --- doc/coreutils.texi | 15 +++++++++++---- 1 file changed, 11 insertions(+), 4 deletions(-) diff --git a/doc/coreutils.texi b/doc/coreutils.texi index eac8d52..e29af8b 100644 --- a/doc/coreutils.texi +++ b/doc/coreutils.texi @@ -1613,10 +1613,7 @@ precedes in the file. @itemx --regex @opindex -r @opindex --regex -Treat the separator string as a regular expression. Users of @command{tac} -on MS-DOS/MS-Windows should note that, since @command{tac} reads files in -binary mode, each line of a text file might end with a CR/LF pair -instead of the Unix-style LF. +Treat the separator string as a regular expression. @item -s @var{separator} @itemx --separator=@var{separator} @@ -1626,8 +1623,18 @@ Use @var{separator} as the record separator, instead of newline. @end table +On systems like MS-DOS that distinguish between text and binary files, +@command{tac} reads and writes in binary mode. + @exitstatus +Example: + +@example +# Reverse a file character by character. +tac -r -s 'x\|[^x]' +@end example + @node nl invocation @section @command{nl}: Number lines and write files -- 2.7.4