Make more(1) POSIX compliant with respect to the -e option.

By default, "more" now works like "less -e", and "more -e" now
works like "less -E", and more never exits just because the file
fits on the first screen, like "less -F" would.

While documenting this, add some text to the DESCRIPTION explaining
how paging works.  That allows a very concise description of -e.

code change ok millert@
manual page joint work with and ok jmc@

3 files changed, 25 insertions, 21 deletions

diff --git a/usr.bin/less/main.c b/usr.bin/less/main.c
index 7d8c9bbde1e..aa222e94110 100644
--- a/usr.bin/less/main.c
+++ b/usr.bin/less/main.c
@@ -56,7 +56,6 @@ static char consoleTitle[256];
 extern int	less_is_more;
 extern int	missing_cap;
 extern int	know_dumb;
-extern int	quit_if_one_screen;
 extern int	pr_type;
 
 
@@ -165,9 +164,6 @@ main(argc, argv)
 		quit(QUIT_OK);
 	}
 
-	if (less_is_more && get_quit_at_eof())
-		quit_if_one_screen = TRUE;
-
 #if EDITOR
 	editor = lgetenv("VISUAL");
 	if (editor == NULL || *editor == '\0')
diff --git a/usr.bin/less/more.1 b/usr.bin/less/more.1
index ea7cc9dfed5..41535b74618 100644
--- a/usr.bin/less/more.1
+++ b/usr.bin/less/more.1
@@ -1,4 +1,4 @@
-.\"	$OpenBSD: more.1,v 1.15 2014/04/25 06:31:48 jmc Exp $
+.\"	$OpenBSD: more.1,v 1.16 2014/04/25 18:07:41 schwarze Exp $
 .\"
 .\" Copyright (c) 1988, 1990, 1993
 .\"	The Regents of the University of California.  All rights reserved.
@@ -43,11 +43,12 @@
 .Op Fl t Ar tag
 .Op Ar
 .Sh DESCRIPTION
+The
 .Nm
-is a filter for paging through text one screenful at a time.
-It uses
-.Xr terminfo 3
-so it can run on a variety of terminals.
+pager displays text one screenful at a time.
+After showing each screenful, it prompts the user for a command.
+Most commands scroll the text or move to a different place
+in the file, while some switch to another file.
 If no
 .Ar file
 is specified, or if
@@ -56,9 +57,23 @@ is a single dash
 .Pq Ql - ,
 the standard input is used.
 .Pp
-This version of the
+When showing the last line of a file,
+.Nm
+displays a prompt indicating end of file and the name of the next file
+to examine, if any.
+It then waits for input from the user.
+Scrolling forward switches to the next file,
+or exits if there is none.
+.Pp
+The
 .Nm
-utility is actually
+utility uses
+.Xr terminfo 3
+so it can run on a variety of terminals.
+.Pp
+This version of
+.Nm
+is actually
 .Xr less 1
 in disguise.
 As such, it will also accept options documented in
@@ -73,12 +88,8 @@ The options are as follows:
 When changing the display, paint from the top line down.
 The default is to scroll from the bottom of the screen.
 .It Fl e
-Exit on reaching end-of-file twice
-without an intervening operation.
-The default is to exit as soon as end-of-file is reached.
-If the file is shorter than a single screen
-.Nm
-exits at end-of-file regardless.
+Exit immediately after showing the last line of the last file,
+without prompting the user for a command first.
 .It Fl i
 Ignore case.
 Upper case and lower case are considered identical.
@@ -305,9 +316,6 @@ utility is compliant with the
 .St -p1003.1-2008
 specification,
 though its presence is optional.
-Behavior for the
-.Fl e
-flag differs between this implementation and the specification.
 .Pp
 Functionality allowing the user to skip (as opposed to scroll)
 forward is not currently implemented.
diff --git a/usr.bin/less/option.c b/usr.bin/less/option.c
index ae4db936a76..33ab6f276bd 100644
--- a/usr.bin/less/option.c
+++ b/usr.bin/less/option.c
@@ -706,5 +706,5 @@ get_quit_at_eof()
 	if (!less_is_more)
 		return quit_at_eof;
 	/* When less_is_more is set, the -e flag semantics are different. */
-	return quit_at_eof ? OPT_ON : OPT_ONPLUS;
+	return quit_at_eof ? OPT_ONPLUS : OPT_ON;
 }