1/*
2 * Copyright 1997 Massachusetts Institute of Technology
3 *
4 * Permission to use, copy, modify, and distribute this software and
5 * its documentation for any purpose and without fee is hereby
6 * granted, provided that both the above copyright notice and this
7 * permission notice appear in all copies, that both the above
8 * copyright notice and this permission notice appear in all
9 * supporting documentation, and that the name of M.I.T. not be used
10 * in advertising or publicity pertaining to distribution of the
11 * software without specific, written prior permission.  M.I.T. makes
12 * no representations about the suitability of this software for any
13 * purpose.  It is provided "as is" without express or implied
14 * warranty.
15 *
16 * THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''.  M.I.T. DISCLAIMS
17 * ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE,
18 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
19 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT
20 * SHALL M.I.T. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
23 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
24 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
25 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
26 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30/*
31 * mode.c - mechanisms for dealing with SGI-style modal displays.
32 *
33 * There are four generally-understood useful modes for status displays
34 * of the sort exemplified by the IRIX ``netstat -C'' and ``osview''
35 * programs.  We try to follow their example, although the user interface
36 * and terminology slightly differ.
37 *
38 * RATE - the default mode - displays the precise rate of change in
39 * each statistic in units per second, regardless of the actual display
40 * update interval.
41 *
42 * DELTA - displays the change in each statistic over the entire
43 * display update interval (i.e., RATE * interval).
44 *
45 * SINCE - displays the total change in each statistic since the module
46 * was last initialized or reset.
47 *
48 * ABSOLUTE - displays the current value of each statistic.
49 *
50 * In the SGI programs, these modes are selected by the single-character
51 * commands D, W, N, and A.  In systat, they are the slightly-harder-to-type
52 * ``mode delta'', etc.  The initial value for SINCE mode is initialized
53 * when the module is first started and can be reset using the ``reset''
54 * command (as opposed to the SGI way where changing modes implicitly
55 * resets).  A ``mode'' command with no arguments displays the current
56 * mode in the command line.
57 */
58
59#include <sys/cdefs.h>
60
61__FBSDID("$FreeBSD$");
62
63#include <sys/types.h>
64
65#include "systat.h"
66#include "extern.h"
67#include "mode.h"
68
69enum mode currentmode = display_RATE;
70
71static const char *const modes[] = { "rate", "delta", "since", "absolute" };
72
73int
74cmdmode(const char *cmd, const char *args)
75{
76	if (prefix(cmd, "mode")) {
77		if (args[0] == '\0') {
78			move(CMDLINE, 0);
79			clrtoeol();
80			printw("%s", modes[currentmode]);
81		} else if (prefix(args, "rate")) {
82			currentmode = display_RATE;
83		} else if (prefix(args, "delta")) {
84			currentmode = display_DELTA;
85		} else if (prefix(args, "since")) {
86			currentmode = display_SINCE;
87		} else if (prefix(args, "absolute")) {
88			currentmode = display_ABS;
89		} else {
90			printw("unknown mode `%s'", args);
91		}
92		return 1;
93	}
94	if(prefix(cmd, "reset")) {
95		curcmd->c_reset();
96		return 1;
97	}
98	return 0;
99}
100