top.c revision 81187 
1char *copyright =
2    "Copyright (c) 1984 through 1996, William LeFebvre";
3
4/*
5 *  Top users/processes display for Unix
6 *  Version 3
7 *
8 *  This program may be freely redistributed,
9 *  but this entire comment MUST remain intact.
10 *
11 *  Copyright (c) 1984, 1989, William LeFebvre, Rice University
12 *  Copyright (c) 1989, 1990, 1992, William LeFebvre, Northwestern University
13 *
14 * $FreeBSD: head/contrib/top/top.c 81187 2001-08-06 03:19:22Z kris $
15 */
16
17/*
18 *  See the file "Changes" for information on version-to-version changes.
19 */
20
21/*
22 *  This file contains "main" and other high-level routines.
23 */
24
25/*
26 * The following preprocessor variables, when defined, are used to
27 * distinguish between different Unix implementations:
28 *
29 *	SIGHOLD  - use SVR4 sighold function when defined
30 *	SIGRELSE - use SVR4 sigrelse function when defined
31 *	FD_SET   - macros FD_SET and FD_ZERO are used when defined
32 */
33
34#include "os.h"
35#include <signal.h>
36#include <setjmp.h>
37#include <ctype.h>
38#include <sys/time.h>
39
40/* includes specific to top */
41#include "display.h"		/* interface to display package */
42#include "screen.h"		/* interface to screen package */
43#include "top.h"
44#include "top.local.h"
45#include "boolean.h"
46#include "machine.h"
47#include "utils.h"
48
49/* Size of the stdio buffer given to stdout */
50#define Buffersize	2048
51
52/* The buffer that stdio will use */
53char stdoutbuf[Buffersize];
54
55/* build Signal masks */
56#define Smask(s)	(1 << ((s) - 1))
57
58/* for system errors */
59extern int errno;
60
61/* for getopt: */
62extern int  optind;
63extern char *optarg;
64
65/* imported from screen.c */
66extern int overstrike;
67
68/* signal handling routines */
69sigret_t leave();
70sigret_t onalrm();
71sigret_t tstop();
72#ifdef SIGWINCH
73sigret_t winch();
74#endif
75
76volatile sig_atomic_t leaveflag;
77volatile sig_atomic_t tstopflag;
78volatile sig_atomic_t winchflag;
79
80/* internal routines */
81void quit();
82
83/* values which need to be accessed by signal handlers */
84static int max_topn;		/* maximum displayable processes */
85
86/* miscellaneous things */
87char *myname = "top";
88jmp_buf jmp_int;
89
90/* routines that don't return int */
91
92char *username();
93char *ctime();
94char *kill_procs();
95char *renice_procs();
96
97#ifdef ORDER
98extern int (*proc_compares[])();
99#else
100extern int proc_compare();
101#endif
102time_t time();
103
104caddr_t get_process_info();
105
106/* different routines for displaying the user's identification */
107/* (values assigned to get_userid) */
108char *username();
109char *itoa7();
110
111/* display routines that need to be predeclared */
112int i_loadave();
113int u_loadave();
114int i_procstates();
115int u_procstates();
116int i_cpustates();
117int u_cpustates();
118int i_memory();
119int u_memory();
120int i_swap();
121int u_swap();
122int i_message();
123int u_message();
124int i_header();
125int u_header();
126int i_process();
127int u_process();
128
129/* pointers to display routines */
130int (*d_loadave)() = i_loadave;
131int (*d_procstates)() = i_procstates;
132int (*d_cpustates)() = i_cpustates;
133int (*d_memory)() = i_memory;
134int (*d_swap)() = i_swap;
135int (*d_message)() = i_message;
136int (*d_header)() = i_header;
137int (*d_process)() = i_process;
138
139
140main(argc, argv)
141
142int  argc;
143char *argv[];
144
145{
146    register int i;
147    register int active_procs;
148    register int change;
149
150    struct system_info system_info;
151    struct statics statics;
152    caddr_t processes;
153
154    static char tempbuf1[50];
155    static char tempbuf2[50];
156    int old_sigmask;		/* only used for BSD-style signals */
157    int topn = Default_TOPN;
158    int delay = Default_DELAY;
159    int displays = 0;		/* indicates unspecified */
160    time_t curr_time;
161    char *(*get_userid)() = username;
162    char *uname_field = "USERNAME";
163    char *header_text;
164    char *env_top;
165    char **preset_argv;
166    int  preset_argc = 0;
167    char **av;
168    int  ac;
169    char dostates = No;
170    char do_unames = Yes;
171    char interactive = Maybe;
172    char warnings = 0;
173#if Default_TOPN == Infinity
174    char topn_specified = No;
175#endif
176    char ch;
177    char *iptr;
178    char no_command = 1;
179    struct timeval timeout;
180    struct process_select ps;
181#ifdef ORDER
182    char *order_name = NULL;
183    int order_index = 0;
184#endif
185#ifndef FD_SET
186    /* FD_SET and friends are not present:  fake it */
187    typedef int fd_set;
188#define FD_ZERO(x)     (*(x) = 0)
189#define FD_SET(f, x)   (*(x) = f)
190#endif
191    fd_set readfds;
192
193#ifdef ORDER
194    static char command_chars[] = "\f qh?en#sdkriIuto";
195#else
196    static char command_chars[] = "\f qh?en#sdkriIut";
197#endif
198/* these defines enumerate the "strchr"s of the commands in command_chars */
199#define CMD_redraw	0
200#define CMD_update	1
201#define CMD_quit	2
202#define CMD_help1	3
203#define CMD_help2	4
204#define CMD_OSLIMIT	4    /* terminals with OS can only handle commands */
205#define CMD_errors	5    /* less than or equal to CMD_OSLIMIT	   */
206#define CMD_number1	6
207#define CMD_number2	7
208#define CMD_delay	8
209#define CMD_displays	9
210#define CMD_kill	10
211#define CMD_renice	11
212#define CMD_idletog     12
213#define CMD_idletog2    13
214#define CMD_user	14
215#define CMD_selftog	15
216#ifdef ORDER
217#define CMD_order       16
218#endif
219
220    /* set the buffer for stdout */
221#ifdef DEBUG
222    setbuffer(stdout, NULL, 0);
223#else
224    setbuffer(stdout, stdoutbuf, Buffersize);
225#endif
226
227    /* get our name */
228    if (argc > 0)
229    {
230	if ((myname = strrchr(argv[0], '/')) == 0)
231	{
232	    myname = argv[0];
233	}
234	else
235	{
236	    myname++;
237	}
238    }
239
240    /* initialize some selection options */
241    ps.idle    = Yes;
242    ps.self    = -1;
243    ps.system  = No;
244    ps.uid     = -1;
245    ps.command = NULL;
246
247    /* get preset options from the environment */
248    if ((env_top = getenv("TOP")) != NULL)
249    {
250	av = preset_argv = argparse(env_top, &preset_argc);
251	ac = preset_argc;
252
253	/* set the dummy argument to an explanatory message, in case
254	   getopt encounters a bad argument */
255	preset_argv[0] = "while processing environment";
256    }
257
258    /* process options */
259    do {
260	/* if we're done doing the presets, then process the real arguments */
261	if (preset_argc == 0)
262	{
263	    ac = argc;
264	    av = argv;
265
266	    /* this should keep getopt happy... */
267	    optind = 1;
268	}
269
270	while ((i = getopt(ac, av, "SIbinqus:d:U:o:t")) != EOF)
271	{
272	    switch(i)
273	    {
274	      case 'u':			/* toggle uid/username display */
275		do_unames = !do_unames;
276		break;
277
278	      case 'U':			/* display only username's processes */
279		if ((ps.uid = userid(optarg)) == -1)
280		{
281		    fprintf(stderr, "%s: unknown user\n", optarg);
282		    exit(1);
283		}
284		break;
285
286	      case 'S':			/* show system processes */
287		ps.system = !ps.system;
288		break;
289
290	      case 'I':                   /* show idle processes */
291		ps.idle = !ps.idle;
292		break;
293
294	      case 'i':			/* go interactive regardless */
295		interactive = Yes;
296		break;
297
298	      case 'n':			/* batch, or non-interactive */
299	      case 'b':
300		interactive = No;
301		break;
302
303	      case 'd':			/* number of displays to show */
304		if ((i = atoiwi(optarg)) == Invalid || i == 0)
305		{
306		    fprintf(stderr,
307			"%s: warning: display count should be positive -- option ignored\n",
308			myname);
309		    warnings++;
310		}
311		else
312		{
313		    displays = i;
314		}
315		break;
316
317	      case 's':
318		if ((delay = atoi(optarg)) < 0)
319		{
320		    fprintf(stderr,
321			"%s: warning: seconds delay should be non-negative -- using default\n",
322			myname);
323		    delay = Default_DELAY;
324		    warnings++;
325		}
326		break;
327
328	      case 'q':		/* be quick about it */
329		/* only allow this if user is really root */
330		if (getuid() == 0)
331		{
332		    /* be very un-nice! */
333		    (void) nice(-20);
334		}
335		else
336		{
337		    fprintf(stderr,
338			"%s: warning: `-q' option can only be used by root\n",
339			myname);
340		    warnings++;
341		}
342		break;
343
344	      case 'o':		/* select sort order */
345#ifdef ORDER
346		order_name = optarg;
347#else
348		fprintf(stderr,
349			"%s: this platform does not support arbitrary ordering.  Sorry.\n",
350			myname);
351		warnings++;
352#endif
353		break;
354
355	      case 't':
356		ps.self = (ps.self == -1) ? getpid() : -1;
357		break;
358
359	      default:
360		fprintf(stderr, "\
361Top version %s\n\
362Usage: %s [-ISbinqut] [-d x] [-s x] [-o field] [-U username] [number]\n",
363			version_string(), myname);
364		exit(1);
365	    }
366	}
367
368	/* get count of top processes to display (if any) */
369	if (optind < ac)
370	{
371	    if ((topn = atoiwi(av[optind])) == Invalid)
372	    {
373		fprintf(stderr,
374			"%s: warning: process display count should be non-negative -- using default\n",
375			myname);
376		warnings++;
377	    }
378#if Default_TOPN == Infinity
379            else
380	    {
381		topn_specified = Yes;
382	    }
383#endif
384	}
385
386	/* tricky:  remember old value of preset_argc & set preset_argc = 0 */
387	i = preset_argc;
388	preset_argc = 0;
389
390    /* repeat only if we really did the preset arguments */
391    } while (i != 0);
392
393    /* set constants for username/uid display correctly */
394    if (!do_unames)
395    {
396	uname_field = "   UID  ";
397	get_userid = itoa7;
398    }
399
400    /* initialize the kernel memory interface */
401    if (machine_init(&statics) == -1)
402    {
403	exit(1);
404    }
405
406#ifdef ORDER
407    /* determine sorting order index, if necessary */
408    if (order_name != NULL)
409    {
410	if ((order_index = string_index(order_name, statics.order_names)) == -1)
411	{
412	    char **pp;
413
414	    fprintf(stderr, "%s: '%s' is not a recognized sorting order.\n",
415		    myname, order_name);
416	    fprintf(stderr, "\tTry one of these:");
417	    pp = statics.order_names;
418	    while (*pp != NULL)
419	    {
420		fprintf(stderr, " %s", *pp++);
421	    }
422	    fputc('\n', stderr);
423	    exit(1);
424	}
425    }
426#endif
427
428#ifdef no_initialization_needed
429    /* initialize the hashing stuff */
430    if (do_unames)
431    {
432	init_hash();
433    }
434#endif
435
436    /* initialize termcap */
437    init_termcap(interactive);
438
439    /* get the string to use for the process area header */
440    header_text = format_header(uname_field);
441
442    /* initialize display interface */
443    if ((max_topn = display_init(&statics)) == -1)
444    {
445	fprintf(stderr, "%s: can't allocate sufficient memory\n", myname);
446	exit(4);
447    }
448
449    /* print warning if user requested more processes than we can display */
450    if (topn > max_topn)
451    {
452	fprintf(stderr,
453		"%s: warning: this terminal can only display %d processes.\n",
454		myname, max_topn);
455	warnings++;
456    }
457
458    /* adjust for topn == Infinity */
459    if (topn == Infinity)
460    {
461	/*
462	 *  For smart terminals, infinity really means everything that can
463	 *  be displayed, or Largest.
464	 *  On dumb terminals, infinity means every process in the system!
465	 *  We only really want to do that if it was explicitly specified.
466	 *  This is always the case when "Default_TOPN != Infinity".  But if
467	 *  topn wasn't explicitly specified and we are on a dumb terminal
468	 *  and the default is Infinity, then (and only then) we use
469	 *  "Nominal_TOPN" instead.
470	 */
471#if Default_TOPN == Infinity
472	topn = smart_terminal ? Largest :
473		    (topn_specified ? Largest : Nominal_TOPN);
474#else
475	topn = Largest;
476#endif
477    }
478
479    /* set header display accordingly */
480    display_header(topn > 0);
481
482    /* determine interactive state */
483    if (interactive == Maybe)
484    {
485	interactive = smart_terminal;
486    }
487
488    /* if # of displays not specified, fill it in */
489    if (displays == 0)
490    {
491	displays = smart_terminal ? Infinity : 1;
492    }
493
494    /* hold interrupt signals while setting up the screen and the handlers */
495#ifdef SIGHOLD
496    sighold(SIGINT);
497    sighold(SIGQUIT);
498    sighold(SIGTSTP);
499#else
500    old_sigmask = sigblock(Smask(SIGINT) | Smask(SIGQUIT) | Smask(SIGTSTP));
501#endif
502    init_screen();
503    (void) signal(SIGINT, leave);
504    (void) signal(SIGQUIT, leave);
505    (void) signal(SIGTSTP, tstop);
506#ifdef SIGWINCH
507    (void) signal(SIGWINCH, winch);
508#endif
509#ifdef SIGRELSE
510    sigrelse(SIGINT);
511    sigrelse(SIGQUIT);
512    sigrelse(SIGTSTP);
513#else
514    (void) sigsetmask(old_sigmask);
515#endif
516    if (warnings)
517    {
518	fputs("....", stderr);
519	fflush(stderr);			/* why must I do this? */
520	sleep((unsigned)(3 * warnings));
521	fputc('\n', stderr);
522    }
523
524restart:
525
526    /*
527     *  main loop -- repeat while display count is positive or while it
528     *		indicates infinity (by being -1)
529     */
530
531    while ((displays == -1) || (displays-- > 0))
532    {
533	/* get the current stats */
534	get_system_info(&system_info);
535
536	/* get the current set of processes */
537	processes =
538		get_process_info(&system_info,
539				 &ps,
540#ifdef ORDER
541				 proc_compares[order_index]);
542#else
543				 proc_compare);
544#endif
545
546	/* display the load averages */
547	(*d_loadave)(system_info.last_pid,
548		     system_info.load_avg);
549
550	/* display the current time */
551	/* this method of getting the time SHOULD be fairly portable */
552	time(&curr_time);
553	i_uptime(&system_info.boottime, &curr_time);
554	i_timeofday(&curr_time);
555
556	/* display process state breakdown */
557	(*d_procstates)(system_info.p_total,
558			system_info.procstates);
559
560	/* display the cpu state percentage breakdown */
561	if (dostates)	/* but not the first time */
562	{
563	    (*d_cpustates)(system_info.cpustates);
564	}
565	else
566	{
567	    /* we'll do it next time */
568	    if (smart_terminal)
569	    {
570		z_cpustates();
571	    }
572	    else
573	    {
574		putchar('\n');
575	    }
576	    dostates = Yes;
577	}
578
579	/* display memory stats */
580	(*d_memory)(system_info.memory);
581
582	/* display swap stats */
583	(*d_swap)(system_info.swap);
584
585	/* handle message area */
586	(*d_message)();
587
588	/* update the header area */
589	(*d_header)(header_text);
590
591	if (topn > 0)
592	{
593	    /* determine number of processes to actually display */
594	    /* this number will be the smallest of:  active processes,
595	       number user requested, number current screen accomodates */
596	    active_procs = system_info.p_active;
597	    if (active_procs > topn)
598	    {
599		active_procs = topn;
600	    }
601	    if (active_procs > max_topn)
602	    {
603		active_procs = max_topn;
604	    }
605
606	    /* now show the top "n" processes. */
607	    for (i = 0; i < active_procs; i++)
608	    {
609		(*d_process)(i, format_next_process(processes, get_userid));
610	    }
611	}
612	else
613	{
614	    i = 0;
615	}
616
617	/* do end-screen processing */
618	u_endscreen(i);
619
620	/* now, flush the output buffer */
621	fflush(stdout);
622
623	/* only do the rest if we have more displays to show */
624	if (displays)
625	{
626	    /* switch out for new display on smart terminals */
627	    if (smart_terminal)
628	    {
629		if (overstrike)
630		{
631		    reset_display();
632		}
633		else
634		{
635		    d_loadave = u_loadave;
636		    d_procstates = u_procstates;
637		    d_cpustates = u_cpustates;
638		    d_memory = u_memory;
639		    d_swap = u_swap;
640		    d_message = u_message;
641		    d_header = u_header;
642		    d_process = u_process;
643		}
644	    }
645
646	    no_command = Yes;
647	    if (!interactive)
648	    {
649		/* set up alarm */
650		(void) signal(SIGALRM, onalrm);
651		(void) alarm((unsigned)delay);
652
653		/* wait for the rest of it .... */
654		pause();
655	    }
656	    else while (no_command)
657	    {
658		/* assume valid command unless told otherwise */
659		no_command = No;
660
661		/* set up arguments for select with timeout */
662		FD_ZERO(&readfds);
663		FD_SET(1, &readfds);		/* for standard input */
664		timeout.tv_sec  = delay;
665		timeout.tv_usec = 0;
666
667		if (leaveflag) {
668		    end_screen();
669		    exit(0);
670		}
671
672		if (tstopflag) {
673		    /* move to the lower left */
674		    end_screen();
675		    fflush(stdout);
676
677		    /* default the signal handler action */
678		    (void) signal(SIGTSTP, SIG_DFL);
679
680		    /* unblock the signal and send ourselves one */
681#ifdef SIGRELSE
682		    sigrelse(SIGTSTP);
683#else
684		    (void) sigsetmask(sigblock(0) & ~(1 << (SIGTSTP - 1)));
685#endif
686		    (void) kill(0, SIGTSTP);
687
688		    /* reset the signal handler */
689		    (void) signal(SIGTSTP, tstop);
690
691		    /* reinit screen */
692		    reinit_screen();
693		    reset_display();
694		    tstopflag = 0;
695		    goto restart;
696		}
697
698		if (winchflag) {
699		    /* reascertain the screen dimensions */
700		    get_screensize();
701
702		    /* tell display to resize */
703		    max_topn = display_resize();
704
705		    /* reset the signal handler */
706		    (void) signal(SIGWINCH, winch);
707
708		    reset_display();
709		    winchflag = 0;
710		    goto restart;
711		}
712
713		/* wait for either input or the end of the delay period */
714		if (select(32, &readfds, (fd_set *)NULL, (fd_set *)NULL, &timeout) > 0)
715		{
716		    int newval;
717		    char *errmsg;
718
719		    /* something to read -- clear the message area first */
720		    clear_message();
721
722		    /* now read it and convert to command strchr */
723		    /* (use "change" as a temporary to hold strchr) */
724		    (void) read(0, &ch, 1);
725		    if ((iptr = strchr(command_chars, ch)) == NULL)
726		    {
727			if (ch != '\r' && ch != '\n')
728			{
729			    /* illegal command */
730			    new_message(MT_standout, " Command not understood");
731			}
732			putchar('\r');
733			no_command = Yes;
734		    }
735		    else
736		    {
737			change = iptr - command_chars;
738			if (overstrike && change > CMD_OSLIMIT)
739			{
740			    /* error */
741			    new_message(MT_standout,
742			    " Command cannot be handled by this terminal");
743			    putchar('\r');
744			    no_command = Yes;
745			}
746			else switch(change)
747			{
748			    case CMD_redraw:	/* redraw screen */
749				reset_display();
750				break;
751
752			    case CMD_update:	/* merely update display */
753				/* is the load average high? */
754				if (system_info.load_avg[0] > LoadMax)
755				{
756				    /* yes, go home for visual feedback */
757				    go_home();
758				    fflush(stdout);
759				}
760				break;
761
762			    case CMD_quit:	/* quit */
763				quit(0);
764				/*NOTREACHED*/
765				break;
766
767			    case CMD_help1:	/* help */
768			    case CMD_help2:
769				reset_display();
770				clear();
771				show_help();
772				standout("Hit any key to continue: ");
773				fflush(stdout);
774				(void) read(0, &ch, 1);
775				break;
776
777			    case CMD_errors:	/* show errors */
778				if (error_count() == 0)
779				{
780				    new_message(MT_standout,
781					" Currently no errors to report.");
782				    putchar('\r');
783				    no_command = Yes;
784				}
785				else
786				{
787				    reset_display();
788				    clear();
789				    show_errors();
790				    standout("Hit any key to continue: ");
791				    fflush(stdout);
792				    (void) read(0, &ch, 1);
793				}
794				break;
795
796			    case CMD_number1:	/* new number */
797			    case CMD_number2:
798				new_message(MT_standout,
799				    "Number of processes to show: ");
800				newval = readline(tempbuf1, 8, Yes);
801				if (newval > -1)
802				{
803				    if (newval > max_topn)
804				    {
805					new_message(MT_standout | MT_delayed,
806					  " This terminal can only display %d processes.",
807					  max_topn);
808					putchar('\r');
809				    }
810
811				    if (newval == 0)
812				    {
813					/* inhibit the header */
814					display_header(No);
815				    }
816				    else if (newval > topn && topn == 0)
817				    {
818					/* redraw the header */
819					display_header(Yes);
820					d_header = i_header;
821				    }
822				    topn = newval;
823				}
824				break;
825
826			    case CMD_delay:	/* new seconds delay */
827				new_message(MT_standout, "Seconds to delay: ");
828				if ((i = readline(tempbuf1, 8, Yes)) > -1)
829				{
830				    delay = i;
831				}
832				clear_message();
833				break;
834
835			    case CMD_displays:	/* change display count */
836				new_message(MT_standout,
837					"Displays to show (currently %s): ",
838					displays == -1 ? "infinite" :
839							 itoa(displays));
840				if ((i = readline(tempbuf1, 10, Yes)) > 0)
841				{
842				    displays = i;
843				}
844				else if (i == 0)
845				{
846				    quit(0);
847				}
848				clear_message();
849				break;
850
851			    case CMD_kill:	/* kill program */
852				new_message(0, "kill ");
853				if (readline(tempbuf2, sizeof(tempbuf2), No) > 0)
854				{
855				    if ((errmsg = kill_procs(tempbuf2)) != NULL)
856				    {
857					new_message(MT_standout, "%s", errmsg);
858					putchar('\r');
859					no_command = Yes;
860				    }
861				}
862				else
863				{
864				    clear_message();
865				}
866				break;
867
868			    case CMD_renice:	/* renice program */
869				new_message(0, "renice ");
870				if (readline(tempbuf2, sizeof(tempbuf2), No) > 0)
871				{
872				    if ((errmsg = renice_procs(tempbuf2)) != NULL)
873				    {
874					new_message(MT_standout, "%s", errmsg);
875					putchar('\r');
876					no_command = Yes;
877				    }
878				}
879				else
880				{
881				    clear_message();
882				}
883				break;
884
885			    case CMD_idletog:
886			    case CMD_idletog2:
887				ps.idle = !ps.idle;
888				new_message(MT_standout | MT_delayed,
889				    " %sisplaying idle processes.",
890				    ps.idle ? "D" : "Not d");
891				putchar('\r');
892				break;
893
894			    case CMD_selftog:
895				ps.self = (ps.self == -1) ? getpid() : -1;
896				new_message(MT_standout | MT_delayed,
897				    " %sisplaying self.",
898				    (ps.self == -1) ? "D" : "Not d");
899				putchar('\r');
900				break;
901
902			    case CMD_user:
903				new_message(MT_standout,
904				    "Username to show: ");
905				if (readline(tempbuf2, sizeof(tempbuf2), No) > 0)
906				{
907				    if (tempbuf2[0] == '+' &&
908					tempbuf2[1] == '\0')
909				    {
910					ps.uid = -1;
911				    }
912				    else if ((i = userid(tempbuf2)) == -1)
913				    {
914					new_message(MT_standout,
915					    " %s: unknown user", tempbuf2);
916					no_command = Yes;
917				    }
918				    else
919				    {
920					ps.uid = i;
921				    }
922				    putchar('\r');
923				}
924				else
925				{
926				    clear_message();
927				}
928				break;
929
930#ifdef ORDER
931			    case CMD_order:
932				new_message(MT_standout,
933				    "Order to sort: ");
934				if (readline(tempbuf2, sizeof(tempbuf2), No) > 0)
935				{
936				  if ((i = string_index(tempbuf2, statics.order_names)) == -1)
937					{
938					  new_message(MT_standout,
939					      " %s: unrecognized sorting order", tempbuf2);
940					  no_command = Yes;
941				    }
942				    else
943				    {
944					order_index = i;
945				    }
946				    putchar('\r');
947				}
948				else
949				{
950				    clear_message();
951				}
952				break;
953#endif
954
955			    default:
956				new_message(MT_standout, " BAD CASE IN SWITCH!");
957				putchar('\r');
958			}
959		    }
960
961		    /* flush out stuff that may have been written */
962		    fflush(stdout);
963		}
964	    }
965	}
966    }
967
968    quit(0);
969    /*NOTREACHED*/
970}
971
972/*
973 *  reset_display() - reset all the display routine pointers so that entire
974 *	screen will get redrawn.
975 */
976
977reset_display()
978
979{
980    d_loadave    = i_loadave;
981    d_procstates = i_procstates;
982    d_cpustates  = i_cpustates;
983    d_memory     = i_memory;
984    d_swap       = i_swap;
985    d_message	 = i_message;
986    d_header	 = i_header;
987    d_process	 = i_process;
988}
989
990/*
991 *  signal handlers
992 */
993
994sigret_t leave()	/* exit under normal conditions -- INT handler */
995
996{
997    leaveflag = 1;
998}
999
1000sigret_t tstop(i)	/* SIGTSTP handler */
1001
1002int i;
1003
1004{
1005    tstopflag = 1;
1006}
1007
1008#ifdef SIGWINCH
1009sigret_t winch(i)		/* SIGWINCH handler */
1010
1011int i;
1012
1013{
1014    winchflag = 1;
1015}
1016#endif
1017
1018void quit(status)		/* exit under duress */
1019
1020int status;
1021
1022{
1023    end_screen();
1024    exit(status);
1025    /*NOTREACHED*/
1026}
1027
1028sigret_t onalrm()	/* SIGALRM handler */
1029
1030{
1031    /* this is only used in batch mode to break out of the pause() */
1032    /* return; */
1033}
1034
1035