On 11/04/2021 02:42, 積丹尼 Dan Jacobson wrote:
Man wc says
Print newline, word, and byte counts for each FILE, and a total line if
more than one FILE is specified. A word is a non-zero-length sequence
of characters delimited by white space.
first you are talking about bytes, then you are talking about
characters.
So for the latter, please say
characters (not bytes)
or
characters (same as bytes)
or just
bytes
Yes, even if explained in the INFO file.
You're right that this is under-specified,
in both the man page and the info file.
The above is really characters (not bytes).
In fact as a GNU extension it's printable characters.
POSIX does not specify this, but one can confirm like:
$ printf '\xc3 \xc3' | LC_ALL=C wc --word --character --byte
0 3 3
$ printf '\xc3 \xc3' | LC_ALL=C.utf8 wc --word --character --byte
0 1 3
The info file was really quite under-specified in this regard.
I'll apply the attached to clarify things.
Marking this as done.
thanks!
Pádraig
>From c985544e68d1a1c9d231d2f2db03126f9af51ad6 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?P=C3=A1draig=20Brady?= <p...@draigbrady.com>
Date: Sun, 11 Apr 2021 16:24:07 +0100
Subject: [PATCH] doc: clarify what's counted by wc
* src/wc.c (usage): State that only printable characters are considered
when counting words. This also disambiguates wether we're talking
about bytes or characters in this context.
* doc/coreutils.texi (wc invocation): Likewise. Also clarify
that --characters counts valid locale aware characters,
and that --lines does not count a trailing "line" unless
it ends with a newline character.
Fixes https://bugs.gnu.org/47702
---
doc/coreutils.texi | 17 +++++++++++------
src/wc.c | 2 +-
2 files changed, 12 insertions(+), 7 deletions(-)
diff --git a/doc/coreutils.texi b/doc/coreutils.texi
index e53c0de6e..cd10b0d4d 100644
--- a/doc/coreutils.texi
+++ b/doc/coreutils.texi
@@ -3754,9 +3754,10 @@ contents of files.
@cindex word count
@cindex line count
-@command{wc} counts the number of bytes, characters, whitespace-separated
-words, and newlines in each given @var{file}, or standard input if none
-are given or for a @var{file} of @samp{-}. Synopsis:
+@command{wc} counts the number of bytes, characters, words, and newlines
+in each given @var{file}, or standard input if none are given
+or for a @var{file} of @samp{-}. A word is a nonzero length
+sequence of printable characters delimited by white space. Synopsis:
@example
wc [@var{option}]@dots{} [@var{file}]@dots{}
@@ -3807,19 +3808,23 @@ Print only the byte counts.
@itemx --chars
@opindex -m
@opindex --chars
-Print only the character counts.
+Print only the character counts, as per the current locale.
+Invalid characters are not counted.
@item -w
@itemx --words
@opindex -w
@opindex --words
-Print only the word counts.
+Print only the word counts. A word is a nonzero length
+sequence of printable characters separated by white space.
@item -l
@itemx --lines
@opindex -l
@opindex --lines
-Print only the newline counts.
+Print only the newline character counts.
+Note a file without a trailing newline character,
+will not have that last portion included in the line count.
@item -L
@itemx --max-line-length
diff --git a/src/wc.c b/src/wc.c
index 5216db189..263ba30e8 100644
--- a/src/wc.c
+++ b/src/wc.c
@@ -123,7 +123,7 @@ Usage: %s [OPTION]... [FILE]...\n\
fputs (_("\
Print newline, word, and byte counts for each FILE, and a total line if\n\
more than one FILE is specified. A word is a non-zero-length sequence of\n\
-characters delimited by white space.\n\
+printable characters delimited by white space.\n\
"), stdout);
emit_stdin_note ();
--
2.26.2
