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