[PATCH 14/14] Better documentation of TZ variable

From: Bastien Roucariès <[email protected]>

Signed-off-by: Bastien Roucariès <[email protected]>
---
 man7/environ.7 | 34 +++++++++++++++++++++-------------
 1 file changed, 21 insertions(+), 13 deletions(-)

diff --git a/man7/environ.7 b/man7/environ.7
index 79f34a302..173c7a1d9 100644
--- a/man7/environ.7
+++ b/man7/environ.7
@@ -217,6 +217,22 @@ Influences the path prefix of names created by
 and other routines, and the temporary directory used by
 .BR sort (1)
 and other programs.
+.TP
+.B TZ
+The
+.B TZ
+variable along the
+.B TZDIR
+variable
+give timezone information used by
+.BR tzset (3)
+and through that by functions like
+.BR ctime (3),
+.BR localtime (3),
+.BR mktime (3),
+.BR strftime (3).
+See also
+.BR tzselect (8).
 .SH INTERNATIONALIZATION ENVIRONMENT VARIABLES
 .TP
 .B LANG
@@ -247,7 +263,7 @@ the applications used by user.
 .B COLUMNS
 This variable is a positive or zero decimal integer used to indicate the user's preferred width
 in column positions for the terminal screen or window.
-If this variable is unset or set to zero, the applications determines
+If this variable is unset, set to zero or empty, the applications determines
 the number of columns, appropriate for the terminal or window.
 When
 .B COLUMNS
@@ -267,7 +283,7 @@ such as to display data in an area arbitrarily smaller than the terminal or wind
 .B LINES
 This variable is a positive or zero decimal integer used to indicate the user's preferred number
 of lines for the terminal screen or window.
-If this variable is unset or set to zero, the applications determines
+If this variable is unset, set to zero or empty, the applications determines
 the number of lines, appropriate for the terminal or window.
 When
 .B LINES
@@ -338,17 +354,6 @@ to be used with
 The name of the logged-in user (used by some BSD-derived programs).
 Set a login time, see section NOTES below.
 .IP *
-.BR TZ " and " TZDIR
-give timezone information used by
-.BR tzset (3)
-and through that by functions like
-.BR ctime (3),
-.BR localtime (3),
-.BR mktime (3),
-.BR strftime (3).
-See also
-.BR tzselect (8).
-.IP *
 .B TERMCAP
 gives information on how to address a given terminal
 (or gives the name of a file containing such information).
@@ -370,6 +375,9 @@ and should be reasonably portable.
 .PP
 .B PATH
 behavior is specified by  POSIX.1-2017.
+.PP
+.B TZ
+behavior is specified by POSIX.1-2001, POSIX.1-2008, SVr4, 4.3BSD.
 .SH NOTES
 The
 .BR prctl (2)