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Diffstat (limited to 'usr.bin/systat/mode.c')
-rw-r--r-- | usr.bin/systat/mode.c | 96 |
1 files changed, 96 insertions, 0 deletions
diff --git a/usr.bin/systat/mode.c b/usr.bin/systat/mode.c new file mode 100644 index 000000000000..28bc47a92351 --- /dev/null +++ b/usr.bin/systat/mode.c @@ -0,0 +1,96 @@ +/* + * Copyright 1997 Massachusetts Institute of Technology + * + * Permission to use, copy, modify, and distribute this software and + * its documentation for any purpose and without fee is hereby + * granted, provided that both the above copyright notice and this + * permission notice appear in all copies, that both the above + * copyright notice and this permission notice appear in all + * supporting documentation, and that the name of M.I.T. not be used + * in advertising or publicity pertaining to distribution of the + * software without specific, written prior permission. M.I.T. makes + * no representations about the suitability of this software for any + * purpose. It is provided "as is" without express or implied + * warranty. + * + * THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''. M.I.T. DISCLAIMS + * ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE, + * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT + * SHALL M.I.T. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF + * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND + * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, + * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT + * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +/* + * mode.c - mechanisms for dealing with SGI-style modal displays. + * + * There are four generally-understood useful modes for status displays + * of the sort exemplified by the IRIX ``netstat -C'' and ``osview'' + * programs. We try to follow their example, although the user interface + * and terminology slightly differ. + * + * RATE - the default mode - displays the precise rate of change in + * each statistic in units per second, regardless of the actual display + * update interval. + * + * DELTA - displays the change in each statistic over the entire + * display update interval (i.e., RATE * interval). + * + * SINCE - displays the total change in each statistic since the module + * was last initialized or reset. + * + * ABSOLUTE - displays the current value of each statistic. + * + * In the SGI programs, these modes are selected by the single-character + * commands D, W, N, and A. In systat, they are the slightly-harder-to-type + * ``mode delta'', etc. The initial value for SINCE mode is initialized + * when the module is first started and can be reset using the ``reset'' + * command (as opposed to the SGI way where changing modes implicitly + * resets). A ``mode'' command with no arguments displays the current + * mode in the command line. + */ + + +#include <sys/types.h> + +#include "systat.h" +#include "extern.h" +#include "mode.h" + +enum mode currentmode = display_RATE; + +static const char *const modes[] = { "rate", "delta", "since", "absolute" }; + +int +cmdmode(const char *cmd, const char *args) +{ + if (prefix(cmd, "mode")) { + if (args[0] == '\0') { + move(CMDLINE, 0); + clrtoeol(); + printw("%s", modes[currentmode]); + } else if (prefix(args, "rate")) { + currentmode = display_RATE; + } else if (prefix(args, "delta")) { + currentmode = display_DELTA; + } else if (prefix(args, "since")) { + currentmode = display_SINCE; + } else if (prefix(args, "absolute")) { + currentmode = display_ABS; + } else { + printw("unknown mode `%s'", args); + } + return 1; + } + if(prefix(cmd, "reset")) { + curcmd->c_reset(); + return 1; + } + return 0; +} |