screen.c

<B>Digital的Unix操作系统VAX 4.2源码</B>

		    (void) mvprintw(prc_counters[i - soff].pr_inty,
			    prc_counters[i - soff].pr_intx, "%5d",
			    prc_counters[i].pr_interval);

		    (void) mvprintw(prc_counters[i - soff].pr_pcty,
			    prc_counters[i - soff].pr_pctx, "%3.0f%%",
			    percent);

		    (void) mvprintw(prc_counters[i - soff].pr_toty,
			    prc_counters[i - soff].pr_totx, "%8d",
			    prc_counters[i].pr_total);
		}
	}
	else if (showwhich == SHOWCLIENTS) {
		long tot_count;

		tot_count = 0;

		/* Sum up all over all the clients  */
		for (i = 0; i < nclientcounters; i++) {
			tot_count += clnt_counters[i].cl_interval;
		}

		HowMany("client hosts", nclientcounters);

		for (i = soff;
		      (i < nclientcounters) && ((i - soff) < NFSLINES); i++) {
		    if (tot_count)
			percent = (((float) clnt_counters[i].cl_interval)
					 / ((float)tot_count)) * 100.0;
		    else
			percent = 0.0;

		    (void) mvprintw(clnt_counters[i - soff].cl_inty,
			    clnt_counters[i - soff].cl_intx, "%5d",
			    clnt_counters[i].cl_interval);

		    (void) mvprintw(clnt_counters[i - soff].cl_pcty,
			    clnt_counters[i - soff].cl_pctx, "%3.0f%%",
			    percent);

		    (void) mvprintw(clnt_counters[i - soff].cl_toty,
			    clnt_counters[i - soff].cl_totx, "%8d",
			    clnt_counters[i].cl_total);
		}
	}
	else if (showwhich == SHOWHELP) {
		/* do nothing */
	}
	else {
		/*
		 * Print the file counters.  Percentage is calculated as
		 * packets this interval over total NFS packets this
		 * interval.
		 */
		HowMany("files", nfilecounters);

		for (i = soff;
			(i < nfilecounters) && ((i - soff) < NFSLINES); i++) {
			if (nfstotal) {
			    percent = ((float) fil_counters[i].fc_interval /
					  (float) nfstotal) * 100.0;
			}
			else {
				percent = 0.0;
			}

			(void) mvprintw(fil_counters[i - soff].fc_inty,
				fil_counters[i - soff].fc_intx, "%5d",
				fil_counters[i].fc_interval);

			(void) mvprintw(fil_counters[i - soff].fc_pcty,
				fil_counters[i - soff].fc_pctx, "%3.0f%%",
				percent);

			(void) mvprintw(fil_counters[i - soff].fc_toty,
				fil_counters[i - soff].fc_totx, "%8d",
				fil_counters[i].fc_total);
		}
	}

	(void) move(SCR_PROMPT_Y, SCR_PROMPT_X);
	(void) clrtoeol();
	(void) refresh();
}

/*
 * HowMany - put up a label showing how many XXs known/not displayed
 */
HowMany(legend, number)
char *legend;
int number;
{
	static char message[80];
	int mlen;
	
	if (number > NFSLINES) {
	    sprintf(message, "%d %s [%d not displayed]", number, legend,
			number - NFSLINES);
	}
	else
	    sprintf(message, "%d %s", number, legend);

	mlen = strlen(message);
	(void)move(SCR_NFSHDR_Y - 1, 0);
	(void)clrtoeol();
	(void)mvprintw(SCR_NFSHDR_Y - 1, SCR_MIDDLE - (mlen/2), message);
	
	/*
	 * Display scrolling information
	 */
	if (scroll_off[showwhich] > 0)
	    (void)mvprintw(SCR_NFSHDR_Y - 1, 2, "<-more");
	if (scroll_limit[showwhich]) {
	    int slim = *scroll_limit[showwhich];
	    if ((scroll_off[showwhich] + NFSLINES) < slim)
		(void)mvprintw(SCR_NFSHDR_Y - 1, 
				(SCR_MIDDLE * 2) - 8, "more->");
	}
}


/*
 * command - process a command.
 */
void
command()
{
	register int c;
	struct itimerval itv;
	int oldm;
	int reset_prevshowwhich = 1;

	if ((c = getchar()) == EOF)
		finish(-1);

	c &= 0177;

	switch (c) {
	case '\014':			/* redraw			*/
		(void) clearok(curscr, TRUE);
		(void) refresh();
		reset_prevshowwhich = 0;
		break;
	case 'c':			/* show NFS clients		*/
	case 'C':
		showwhich = SHOWCLIENTS;
		(void) mvprintw(SCR_PROMPT_Y, SCR_PROMPT_X,
			"display NFS clients (starting next update)");

		(void) clrtoeol();
		(void) refresh();

		/*
		 * Change screen labels.
		 */
		label_screen();
		break;
	case 'f':			/* toggle what we show		*/
	case 'F':
		switch (showwhich) {
		case SHOWFILESYSTEM:
		    /*
		     * Only do this if it makes sense.
		     */
		    if (filelist == NULL)
			break;
		    showwhich = SHOWINDVFILES;
		    break;
		case SHOWINDVFILES:
		    showwhich = SHOWFILESYSTEM;
		    break;
		case SHOWNFSPROCS:
		case SHOWCLIENTS:
		case SHOWHELP:
		    showwhich = SHOWFILESYSTEM;
		    break;
		}

		(void) mvprintw(SCR_PROMPT_Y, SCR_PROMPT_X,
			"display %s (starting next update)",
				(showwhich == SHOWFILESYSTEM ?
				"file systems" : "individual files"));

		(void) clrtoeol();
		(void) refresh();

		/*
		 * Change screen labels.
		 */
		label_screen();
		break;
	case 'l':			/* toggle logging		*/
	case 'L':
		reset_prevshowwhich = 0;
		if (logging) {
			(void) mvprintw(SCR_PROMPT_Y, SCR_PROMPT_X,
				"logging turned off");

			(void) fprintf(logfp, "#\n# endlog\n#\n");
			(void) fclose(logfp);
			logging = 0;
		}
		else {
			if ((logfp = fopen(logfile, "a")) == NULL) {
				(void) mvprintw(SCR_PROMPT_Y, SCR_PROMPT_X,
					"could not open \"%s\"", logfile);
			}
			else {
				(void) mvprintw(SCR_PROMPT_Y, SCR_PROMPT_X,
					"logging to \"%s\"", logfile);

				(void) fprintf(logfp, "#\n# startlog\n#\n");
				(void) fprintf(logfp, "# NFSwatch log file\n");
				(void) fprintf(logfp, "#    Packets from: %s\n",
					(srcflag ? srchost : "all hosts"));
				(void) fprintf(logfp, "#    Packets to:   %s\n#\n",
					dsthost);

				logging = 1;
			}
		}

		(void) clrtoeol();
		(void) refresh();
		break;
	case 'p':			/* show NFS procedures		*/
	case 'P':
		showwhich = SHOWNFSPROCS;
		(void) mvprintw(SCR_PROMPT_Y, SCR_PROMPT_X,
			"display NFS procedures (starting next update)");

		(void) clrtoeol();
		(void) refresh();

		/*
		 * Change screen labels.
		 */
		label_screen();
		break;
	case 'q':			/* quit				*/
	case 'Q':
		(void) mvaddch(SCR_PROMPT_Y, SCR_PROMPT_X, c);
		(void) refresh();
		finish(-1);
		break;
	case 's':			/* snapshot			*/
	case 'S':
		reset_prevshowwhich = 0;
		oldm = sigblock(sigmask(SIGALRM));
	    				/* no async redisplay while dumping */
		snapshot();
		(void) sigsetmask(oldm);	/* permit async redisplay */
		break;
	case 'u':			/* toggle sort method		*/
	case 'U':
		reset_prevshowwhich = 0;
		sortbyusage = (!sortbyusage);

		(void) mvprintw(SCR_PROMPT_Y, SCR_PROMPT_X, "sort by %s",
				sortbyusage ? "percent usage" : "name");

		(void) clrtoeol();
		(void) refresh();

		/*
		 * Change the sort order now.
		 */
		oldm = sigblock(sigmask(SIGALRM));
	    				/* no redisplay while unstable */
		sort_nfs_counters();
		sort_prc_counters();
		sort_clnt_counters();
		(void) sigsetmask(oldm);	/* permit redisplay */

		/*
		 * Update screen labels and values.
		 */
		label_screen();
		update_screen();
		break;
	case '>':			/* add 1 to cycle time		*/
		reset_prevshowwhich = 0;
		cycletime++;

		(void) getitimer(ITIMER_REAL, &itv);

		itv.it_interval.tv_sec = cycletime;
		itv.it_interval.tv_usec = 0;

		(void) setitimer(ITIMER_REAL, &itv, (struct itimerval *) 0);

		(void) mvprintw(SCR_PROMPT_Y, SCR_PROMPT_X,
			"cycletime = %d seconds", cycletime);
		(void) clrtoeol();
		(void) refresh();
		break;
	case '<':			/* subtract 1 from cycletime	*/
		reset_prevshowwhich = 0;
		if (cycletime > 1) {
			cycletime--;

			(void) getitimer(ITIMER_REAL, &itv);

			itv.it_interval.tv_sec = cycletime;
			itv.it_interval.tv_usec = 0;

			(void) setitimer(ITIMER_REAL, &itv,
				(struct itimerval *) 0);

			(void) mvprintw(SCR_PROMPT_Y, SCR_PROMPT_X,
				"cycletime = %d seconds", cycletime);
			(void) clrtoeol();
			(void) refresh();
		}

		break;
	case '+':			/* increase cycletime		*/
		reset_prevshowwhich = 0;
		cycletime += CYCLETIME;

		(void) getitimer(ITIMER_REAL, &itv);

		itv.it_interval.tv_sec = cycletime;
		itv.it_interval.tv_usec = 0;

		(void) setitimer(ITIMER_REAL, &itv, (struct itimerval *) 0);

		(void) mvprintw(SCR_PROMPT_Y, SCR_PROMPT_X,
			"cycletime = %d seconds", cycletime);
		(void) clrtoeol();
		(void) refresh();
		break;
	case '-':			/* decrease cycletime		*/
		reset_prevshowwhich = 0;
		if (cycletime > CYCLETIME) {
			cycletime -= CYCLETIME;

			(void) getitimer(ITIMER_REAL, &itv);

			itv.it_interval.tv_sec = cycletime;
			itv.it_interval.tv_usec = 0;

			(void) setitimer(ITIMER_REAL, &itv,
				(struct itimerval *) 0);

			(void) mvprintw(SCR_PROMPT_Y, SCR_PROMPT_X,
				"cycletime = %d seconds", cycletime);
			(void) clrtoeol();
			(void) refresh();
		}

		break;
	case '=':			/* reset cycletime		*/
		reset_prevshowwhich = 0;
		cycletime = CYCLETIME;

		(void) getitimer(ITIMER_REAL, &itv);

		itv.it_interval.tv_sec = cycletime;
		itv.it_interval.tv_usec = 0;

		(void) setitimer(ITIMER_REAL, &itv, (struct itimerval *) 0);

		(void) mvprintw(SCR_PROMPT_Y, SCR_PROMPT_X,
			"cycletime reset to %d seconds", cycletime);
		(void) clrtoeol();
		(void) refresh();
		break;
	case ']':			/* scroll forward		*/
		reset_prevshowwhich = 0;
		{
		    int slim;
		    if (scroll_limit[showwhich] == NULL)
			break;
		    slim = *(scroll_limit[showwhich]);
		    if (slim <= NFSLINES)
			break;
		    scroll_off[showwhich] += NFSLINES - 2;
		    if (scroll_off[showwhich] > (slim - NFSLINES)) {
			scroll_off[showwhich] = (slim - NFSLINES);
		    }
		}

		(void) clrtoeol();
		label_screen();
		update_screen();
		(void) refresh();

		break;
	case '[':			/* scroll back			*/
		reset_prevshowwhich = 0;
		scroll_off[showwhich] -= NFSLINES - 2;
		if (scroll_off[showwhich] < 0)
		    scroll_off[showwhich] = 0;

		(void) clrtoeol();
		label_screen();
		update_screen();
		(void) refresh();

		break;
	case ' ':			/* resume after help */
		if (prev_showwhich > 0) {
		    showwhich = prev_showwhich;
		    label_screen();
		    update_screen();
		    (void) refresh();
		    break;
		}
		/* not set?  drops through to "default" */
	default:			/* give them some help		*/
		reset_prevshowwhich = 0;

		if (showwhich != SHOWHELP)	/* save current display mode */
			prev_showwhich = showwhich;

		showwhich = SHOWHELP;
		
		label_screen();
		(void) refresh();

		break;
	}

	if (reset_prevshowwhich)
		prev_showwhich = 0;
}