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 * $FreeBSD: src/usr.bin/systat/mode.c,v 1.2 1999/08/28 01:06:03 peter Exp $ 30 * $DragonFly: src/usr.bin/systat/mode.c,v 1.3 2008/11/10 04:59:45 swildner Exp $ 31 */ 32 33 /* 34 * mode.c - mechanisms for dealing with SGI-style modal displays. 35 * 36 * There are four generally-understood useful modes for status displays 37 * of the sort exemplified by the IRIX ``netstat -C'' and ``osview'' 38 * programs. We try to follow their example, although the user interface 39 * and terminology slightly differ. 40 * 41 * RATE - the default mode - displays the precise rate of change in 42 * each statistic in units per second, regardless of the actual display 43 * update interval. 44 * 45 * DELTA - displays the change in each statistic over the entire 46 * display update interval (i.e., RATE * interval). 47 * 48 * SINCE - displays the total change in each statistic since the module 49 * was last initialized or reset. 50 * 51 * ABSOLUTE - displays the current value of each statistic. 52 * 53 * In the SGI programs, these modes are selected by the single-character 54 * commands D, W, N, and A. In systat, they are the slightly-harder-to-type 55 * ``mode delta'', etc. The initial value for SINCE mode is initialized 56 * when the module is first started and can be reset using the ``reset'' 57 * command (as opposed to the SGI way where changing modes implicitly 58 * resets). A ``mode'' command with no arguments displays the current 59 * mode in the command line. 60 */ 61 62 #include <sys/types.h> 63 64 #include "systat.h" 65 #include "extern.h" 66 #include "mode.h" 67 68 enum mode currentmode = display_RATE; 69 70 static const char *const modes[] = { "rate", "delta", "since", "absolute" }; 71 72 int 73 cmdmode(const char *cmd, char *args) 74 { 75 if (prefix(cmd, "mode")) { 76 if (args[0] == '\0') { 77 move(CMDLINE, 0); 78 clrtoeol(); 79 printw("%s", modes[currentmode]); 80 } else if (prefix(args, "rate")) { 81 currentmode = display_RATE; 82 } else if (prefix(args, "delta")) { 83 currentmode = display_DELTA; 84 } else if (prefix(args, "since")) { 85 currentmode = display_SINCE; 86 } else if (prefix(args, "absolute")) { 87 currentmode = display_ABS; 88 } else { 89 printw("unknown mode `%s'", args); 90 } 91 return 1; 92 } 93 if(prefix(cmd, "reset")) { 94 curcmd->c_reset(); 95 return 1; 96 } 97 return 0; 98 } 99