The sort(1) manpage mentions the LC_* environment variables
and how they affect sorting and efficiency, but we only
support LC_CTYPE, right? Would it be an omprovement
to remove these from the manpage?
Jan
Index: sort.1
===================================================================
RCS file: /cvs/src/usr.bin/sort/sort.1,v
retrieving revision 1.54
diff -u -p -r1.54 sort.1
--- sort.1 5 Apr 2015 14:20:22 -0000 1.54
+++ sort.1 7 Oct 2016 10:37:14 -0000
@@ -56,9 +56,8 @@ newline (default) or NUL \'\\0\' charact
A record can contain any printable or unprintable characters.
Comparisons are based on one or more sort keys extracted from
each line of input, and are performed lexicographically,
-according to the current locale's collating rules and the
-specified command-line options that can tune the actual
-sorting behavior.
+according to the command-line options
+that can tune the actual sorting behavior.
By default, if keys are not given,
.Nm
uses entire lines for comparison.
@@ -173,10 +172,6 @@ Unknown strings are considered smaller t
.It Fl n , Fl Fl numeric-sort, Fl Fl sort=numeric
An initial numeric string, consisting of optional blank space, optional
minus sign, and zero or more digits (including decimal point)
-.\" with
-.\" optional radix character and thousands
-.\" separator
-.\" (as defined in the current locale),
is sorted by arithmetic value.
Leading blank characters are ignored.
.It Fl R, Fl Fl random-sort, Fl Fl sort=random
@@ -494,43 +489,6 @@ which has no
equivalent.
.Sh ENVIRONMENT
.Bl -tag -width Fl
-.It Ev GNUSORT_NUMERIC_COMPATIBILITY
-If defined
-.Fl t
-will not override the locale numeric symbols, that is, thousand
-separators and decimal separators.
-By default, if we specify
-.Fl t
-with the same symbol as the thousand separator or decimal point,
-the symbol will be treated as the field separator.
-Older behavior was less definite: the symbol was treated as both field
-separator and numeric separator, simultaneously.
-This environment variable enables the old behavior.
-.It Ev LANG
-Used as a last resort to determine different kinds of locale-specific
-behavior if neither the respective environment variable nor
-.Ev LC_ALL
-are set.
-.It Ev LC_ALL
-Locale settings that override all of the other locale settings.
-This environment variable can be used to set all these settings
-to the same value at once.
-.It Ev LC_COLLATE
-Locale settings to be used to determine the collation for
-sorting records.
-.It Ev LC_CTYPE
-Locale settings to be used to case conversion and classification
-of characters, that is, which characters are considered
-whitespaces, etc.
-.It Ev LC_MESSAGES
-Locale settings that determine the language of output messages
-that
-.Nm
-prints out.
-.It Ev LC_NUMERIC
-Locale settings that determine the number format used in numeric sort.
-.It Ev LC_TIME
-Locale settings that determine the month format used in month sort.
.It Ev TMPDIR
Path to the directory in which temporary files will be stored.
Note that
@@ -624,13 +582,10 @@ This implementation of
has no limits on input line length (other than imposed by available
memory) or any restrictions on bytes allowed within lines.
.Pp
-The performance depends highly on locale settings,
+The performance depends highly on
efficient choice of sort keys and key complexity.
-The fastest sort is with the C locale, on whole lines, with option
+The fastest sort is on whole lines, with option
.Fl s .
-In general, the C locale is the fastest, followed by single-byte
-locales with multi-byte locales being the slowest.
-The correct collation order respected in all cases.
For the key specification, the simpler to process the
lines the faster the search will be.
.Pp
