1/*
2 *  Top users/processes display for Unix
3 *  Version 3
4 *
5 *  This program may be freely redistributed,
6 *  but this entire comment MUST remain intact.
7 *
8 *  Copyright (c) 1984, 1989, William LeFebvre, Rice University
9 *  Copyright (c) 1989, 1990, 1992, William LeFebvre, Northwestern University
10 *
11 * $FreeBSD$
12 */
13
14/*
15 *  This file contains the routines that display information on the screen.
16 *  Each section of the screen has two routines:  one for initially writing
17 *  all constant and dynamic text, and one for only updating the text that
18 *  changes.  The prefix "i_" is used on all the "initial" routines and the
19 *  prefix "u_" is used for all the "updating" routines.
20 *
21 *  ASSUMPTIONS:
22 *        None of the "i_" routines use any of the termcap capabilities.
23 *        In this way, those routines can be safely used on terminals that
24 *        have minimal (or nonexistant) terminal capabilities.
25 *
26 *        The routines are called in this order:  *_loadave, i_timeofday,
27 *        *_procstates, *_cpustates, *_memory, *_message, *_header,
28 *        *_process, u_endscreen.
29 */
30
31#include "os.h"
32
33#include <sys/time.h>
34
35#include <ctype.h>
36#include <time.h>
37#include <unistd.h>
38
39#include "screen.h"		/* interface to screen package */
40#include "layout.h"		/* defines for screen position layout */
41#include "display.h"
42#include "top.h"
43#include "top.local.h"
44#include "boolean.h"
45#include "machine.h"		/* we should eliminate this!!! */
46#include "utils.h"
47
48#ifdef DEBUG
49FILE *debug;
50#endif
51
52/* imported from screen.c */
53extern int overstrike;
54
55static int lmpid = 0;
56static int last_hi = 0;		/* used in u_process and u_endscreen */
57static int lastline = 0;
58static int display_width = MAX_COLS;
59
60#define lineindex(l) ((l)*display_width)
61
62
63/* things initialized by display_init and used thruout */
64
65/* buffer of proc information lines for display updating */
66char *screenbuf = NULL;
67
68static char **procstate_names;
69static char **cpustate_names;
70static char **memory_names;
71static char **arc_names;
72static char **swap_names;
73
74static int num_procstates;
75static int num_cpustates;
76static int num_memory;
77static int num_swap;
78
79static int *lprocstates;
80static int *lcpustates;
81static int *lmemory;
82static int *lswap;
83
84static int num_cpus;
85static int *cpustate_columns;
86static int cpustate_total_length;
87static int cpustates_column;
88
89static enum { OFF, ON, ERASE } header_status = ON;
90
91static int string_count();
92static void summary_format();
93static void line_update();
94
95int  x_lastpid =	10;
96int  y_lastpid =	0;
97int  x_loadave =	33;
98int  x_loadave_nompid =	15;
99int  y_loadave =	0;
100int  x_procstate =	0;
101int  y_procstate =	1;
102int  x_brkdn =		15;
103int  y_brkdn =		1;
104int  x_mem =		5;
105int  y_mem =		3;
106int  x_arc =		5;
107int  y_arc =		4;
108int  x_swap =		6;
109int  y_swap =		4;
110int  y_message =	5;
111int  x_header =		0;
112int  y_header =		6;
113int  x_idlecursor =	0;
114int  y_idlecursor =	5;
115int  y_procs =		7;
116
117int  y_cpustates =	2;
118int  Header_lines =	7;
119
120int display_resize()
121
122{
123    register int lines;
124
125    /* first, deallocate any previous buffer that may have been there */
126    if (screenbuf != NULL)
127    {
128	free(screenbuf);
129    }
130
131    /* calculate the current dimensions */
132    /* if operating in "dumb" mode, we only need one line */
133    lines = smart_terminal ? screen_length - Header_lines : 1;
134
135    if (lines < 0)
136	lines = 0;
137    /* we don't want more than MAX_COLS columns, since the machine-dependent
138       modules make static allocations based on MAX_COLS and we don't want
139       to run off the end of their buffers */
140    display_width = screen_width;
141    if (display_width >= MAX_COLS)
142    {
143	display_width = MAX_COLS - 1;
144    }
145
146    /* now, allocate space for the screen buffer */
147    screenbuf = (char *)malloc(lines * display_width);
148    if (screenbuf == (char *)NULL)
149    {
150	/* oops! */
151	return(-1);
152    }
153
154    /* return number of lines available */
155    /* for dumb terminals, pretend like we can show any amount */
156    return(smart_terminal ? lines : Largest);
157}
158
159int display_updatecpus(statics)
160
161struct statics *statics;
162
163{
164    register int *lp;
165    register int lines;
166    register int i;
167
168    /* call resize to do the dirty work */
169    lines = display_resize();
170    if (pcpu_stats)
171	num_cpus = statics->ncpus;
172    else
173	num_cpus = 1;
174    cpustates_column = 5;	/* CPU: */
175    if (num_cpus != 1)
176    cpustates_column += 2;	/* CPU 0: */
177    for (i = num_cpus; i > 9; i /= 10)
178	cpustates_column++;
179
180    /* fill the "last" array with all -1s, to insure correct updating */
181    lp = lcpustates;
182    i = num_cpustates * num_cpus;
183    while (--i >= 0)
184    {
185	*lp++ = -1;
186    }
187
188    return(lines);
189}
190
191int display_init(statics)
192
193struct statics *statics;
194
195{
196    register int lines;
197    register char **pp;
198    register int *ip;
199    register int i;
200
201    lines = display_updatecpus(statics);
202
203    /* only do the rest if we need to */
204    if (lines > -1)
205    {
206	/* save pointers and allocate space for names */
207	procstate_names = statics->procstate_names;
208	num_procstates = string_count(procstate_names);
209	lprocstates = (int *)malloc(num_procstates * sizeof(int));
210
211	cpustate_names = statics->cpustate_names;
212
213	swap_names = statics->swap_names;
214	num_swap = string_count(swap_names);
215	lswap = (int *)malloc(num_swap * sizeof(int));
216	num_cpustates = string_count(cpustate_names);
217	lcpustates = (int *)malloc(num_cpustates * sizeof(int) * statics->ncpus);
218	cpustate_columns = (int *)malloc(num_cpustates * sizeof(int));
219
220	memory_names = statics->memory_names;
221	num_memory = string_count(memory_names);
222	lmemory = (int *)malloc(num_memory * sizeof(int));
223
224	arc_names = statics->arc_names;
225
226	/* calculate starting columns where needed */
227	cpustate_total_length = 0;
228	pp = cpustate_names;
229	ip = cpustate_columns;
230	while (*pp != NULL)
231	{
232	    *ip++ = cpustate_total_length;
233	    if ((i = strlen(*pp++)) > 0)
234	    {
235		cpustate_total_length += i + 8;
236	    }
237	}
238    }
239
240    /* return number of lines available */
241    return(lines);
242}
243
244void
245i_loadave(mpid, avenrun)
246
247int mpid;
248double *avenrun;
249
250{
251    register int i;
252
253    /* i_loadave also clears the screen, since it is first */
254    clear();
255
256    /* mpid == -1 implies this system doesn't have an _mpid */
257    if (mpid != -1)
258    {
259	printf("last pid: %5d;  ", mpid);
260    }
261
262    printf("load averages");
263
264    for (i = 0; i < 3; i++)
265    {
266	printf("%c %5.2f",
267	    i == 0 ? ':' : ',',
268	    avenrun[i]);
269    }
270    lmpid = mpid;
271}
272
273void
274u_loadave(mpid, avenrun)
275
276int mpid;
277double *avenrun;
278
279{
280    register int i;
281
282    if (mpid != -1)
283    {
284	/* change screen only when value has really changed */
285	if (mpid != lmpid)
286	{
287	    Move_to(x_lastpid, y_lastpid);
288	    printf("%5d", mpid);
289	    lmpid = mpid;
290	}
291
292	/* i remembers x coordinate to move to */
293	i = x_loadave;
294    }
295    else
296    {
297	i = x_loadave_nompid;
298    }
299
300    /* move into position for load averages */
301    Move_to(i, y_loadave);
302
303    /* display new load averages */
304    /* we should optimize this and only display changes */
305    for (i = 0; i < 3; i++)
306    {
307	printf("%s%5.2f",
308	    i == 0 ? "" : ", ",
309	    avenrun[i]);
310    }
311}
312
313void
314i_timeofday(tod)
315
316time_t *tod;
317
318{
319    /*
320     *  Display the current time.
321     *  "ctime" always returns a string that looks like this:
322     *
323     *	Sun Sep 16 01:03:52 1973
324     *      012345678901234567890123
325     *	          1         2
326     *
327     *  We want indices 11 thru 18 (length 8).
328     */
329
330    if (smart_terminal)
331    {
332	Move_to(screen_width - 8, 0);
333    }
334    else
335    {
336	fputs("    ", stdout);
337    }
338#ifdef DEBUG
339    {
340	char *foo;
341	foo = ctime(tod);
342	fputs(foo, stdout);
343    }
344#endif
345    printf("%-8.8s\n", &(ctime(tod)[11]));
346    lastline = 1;
347}
348
349static int ltotal = 0;
350static char procstates_buffer[MAX_COLS];
351
352/*
353 *  *_procstates(total, brkdn, names) - print the process summary line
354 *
355 *  Assumptions:  cursor is at the beginning of the line on entry
356 *		  lastline is valid
357 */
358
359void
360i_procstates(total, brkdn)
361
362int total;
363int *brkdn;
364
365{
366    register int i;
367
368    /* write current number of processes and remember the value */
369    printf("%d processes:", total);
370    ltotal = total;
371
372    /* put out enough spaces to get to column 15 */
373    i = digits(total);
374    while (i++ < 4)
375    {
376	putchar(' ');
377    }
378
379    /* format and print the process state summary */
380    summary_format(procstates_buffer, brkdn, procstate_names);
381    fputs(procstates_buffer, stdout);
382
383    /* save the numbers for next time */
384    memcpy(lprocstates, brkdn, num_procstates * sizeof(int));
385}
386
387void
388u_procstates(total, brkdn)
389
390int total;
391int *brkdn;
392
393{
394    static char new[MAX_COLS];
395    register int i;
396
397    /* update number of processes only if it has changed */
398    if (ltotal != total)
399    {
400	/* move and overwrite */
401#if (x_procstate == 0)
402	Move_to(x_procstate, y_procstate);
403#else
404	/* cursor is already there...no motion needed */
405	/* assert(lastline == 1); */
406#endif
407	printf("%d", total);
408
409	/* if number of digits differs, rewrite the label */
410	if (digits(total) != digits(ltotal))
411	{
412	    fputs(" processes:", stdout);
413	    /* put out enough spaces to get to column 15 */
414	    i = digits(total);
415	    while (i++ < 4)
416	    {
417		putchar(' ');
418	    }
419	    /* cursor may end up right where we want it!!! */
420	}
421
422	/* save new total */
423	ltotal = total;
424    }
425
426    /* see if any of the state numbers has changed */
427    if (memcmp(lprocstates, brkdn, num_procstates * sizeof(int)) != 0)
428    {
429	/* format and update the line */
430	summary_format(new, brkdn, procstate_names);
431	line_update(procstates_buffer, new, x_brkdn, y_brkdn);
432	memcpy(lprocstates, brkdn, num_procstates * sizeof(int));
433    }
434}
435
436#ifdef no_more
437/*
438 *  *_cpustates(states, names) - print the cpu state percentages
439 *
440 *  Assumptions:  cursor is on the PREVIOUS line
441 */
442
443/* cpustates_tag() calculates the correct tag to use to label the line */
444
445char *cpustates_tag()
446
447{
448    register char *use;
449
450    static char *short_tag = "CPU: ";
451    static char *long_tag = "CPU states: ";
452
453    /* if length + strlen(long_tag) >= screen_width, then we have to
454       use the shorter tag (we subtract 2 to account for ": ") */
455    if (cpustate_total_length + (int)strlen(long_tag) - 2 >= screen_width)
456    {
457	use = short_tag;
458    }
459    else
460    {
461	use = long_tag;
462    }
463
464    /* set cpustates_column accordingly then return result */
465    cpustates_column = strlen(use);
466    return(use);
467}
468#endif
469
470void
471i_cpustates(states)
472
473int *states;
474
475{
476    register int i = 0;
477    register int value;
478    register char **names;
479    register char *thisname;
480    int cpu;
481
482for (cpu = 0; cpu < num_cpus; cpu++) {
483    names = cpustate_names;
484
485    /* print tag and bump lastline */
486    if (num_cpus == 1)
487	printf("\nCPU: ");
488    else {
489	value = printf("\nCPU %d: ", cpu);
490	while (value++ <= cpustates_column)
491		printf(" ");
492    }
493    lastline++;
494
495    /* now walk thru the names and print the line */
496    while ((thisname = *names++) != NULL)
497    {
498	if (*thisname != '\0')
499	{
500	    /* retrieve the value and remember it */
501	    value = *states++;
502
503	    /* if percentage is >= 1000, print it as 100% */
504	    printf((value >= 1000 ? "%s%4.0f%% %s" : "%s%4.1f%% %s"),
505		   (i++ % num_cpustates) == 0 ? "" : ", ",
506		   ((float)value)/10.,
507		   thisname);
508	}
509    }
510}
511
512    /* copy over values into "last" array */
513    memcpy(lcpustates, states, num_cpustates * sizeof(int) * num_cpus);
514}
515
516void
517u_cpustates(states)
518
519int *states;
520
521{
522    register int value;
523    register char **names;
524    register char *thisname;
525    register int *lp;
526    register int *colp;
527    int cpu;
528
529for (cpu = 0; cpu < num_cpus; cpu++) {
530    names = cpustate_names;
531
532    Move_to(cpustates_column, y_cpustates + cpu);
533    lastline = y_cpustates + cpu;
534    lp = lcpustates + (cpu * num_cpustates);
535    colp = cpustate_columns;
536
537    /* we could be much more optimal about this */
538    while ((thisname = *names++) != NULL)
539    {
540	if (*thisname != '\0')
541	{
542	    /* did the value change since last time? */
543	    if (*lp != *states)
544	    {
545		/* yes, move and change */
546		Move_to(cpustates_column + *colp, y_cpustates + cpu);
547		lastline = y_cpustates + cpu;
548
549		/* retrieve value and remember it */
550		value = *states;
551
552		/* if percentage is >= 1000, print it as 100% */
553		printf((value >= 1000 ? "%4.0f" : "%4.1f"),
554		       ((double)value)/10.);
555
556		/* remember it for next time */
557		*lp = value;
558	    }
559	}
560
561	/* increment and move on */
562	lp++;
563	states++;
564	colp++;
565    }
566}
567}
568
569void
570z_cpustates()
571
572{
573    register int i = 0;
574    register char **names;
575    register char *thisname;
576    register int *lp;
577    int cpu, value;
578
579for (cpu = 0; cpu < num_cpus; cpu++) {
580    names = cpustate_names;
581
582    /* show tag and bump lastline */
583    if (num_cpus == 1)
584	printf("\nCPU: ");
585    else {
586	value = printf("\nCPU %d: ", cpu);
587	while (value++ <= cpustates_column)
588		printf(" ");
589    }
590    lastline++;
591
592    while ((thisname = *names++) != NULL)
593    {
594	if (*thisname != '\0')
595	{
596	    printf("%s    %% %s", (i++ % num_cpustates) == 0 ? "" : ", ", thisname);
597	}
598    }
599}
600
601    /* fill the "last" array with all -1s, to insure correct updating */
602    lp = lcpustates;
603    i = num_cpustates * num_cpus;
604    while (--i >= 0)
605    {
606	*lp++ = -1;
607    }
608}
609
610/*
611 *  *_memory(stats) - print "Memory: " followed by the memory summary string
612 *
613 *  Assumptions:  cursor is on "lastline"
614 *                for i_memory ONLY: cursor is on the previous line
615 */
616
617char memory_buffer[MAX_COLS];
618
619void
620i_memory(stats)
621
622int *stats;
623
624{
625    fputs("\nMem: ", stdout);
626    lastline++;
627
628    /* format and print the memory summary */
629    summary_format(memory_buffer, stats, memory_names);
630    fputs(memory_buffer, stdout);
631}
632
633void
634u_memory(stats)
635
636int *stats;
637
638{
639    static char new[MAX_COLS];
640
641    /* format the new line */
642    summary_format(new, stats, memory_names);
643    line_update(memory_buffer, new, x_mem, y_mem);
644}
645
646/*
647 *  *_arc(stats) - print "ARC: " followed by the ARC summary string
648 *
649 *  Assumptions:  cursor is on "lastline"
650 *                for i_arc ONLY: cursor is on the previous line
651 */
652char arc_buffer[MAX_COLS];
653
654void
655i_arc(stats)
656
657int *stats;
658
659{
660    if (arc_names == NULL)
661	return;
662
663    fputs("\nARC: ", stdout);
664    lastline++;
665
666    /* format and print the memory summary */
667    summary_format(arc_buffer, stats, arc_names);
668    fputs(arc_buffer, stdout);
669}
670
671void
672u_arc(stats)
673
674int *stats;
675
676{
677    static char new[MAX_COLS];
678
679    if (arc_names == NULL)
680	return;
681
682    /* format the new line */
683    summary_format(new, stats, arc_names);
684    line_update(arc_buffer, new, x_arc, y_arc);
685}
686
687
688/*
689 *  *_swap(stats) - print "Swap: " followed by the swap summary string
690 *
691 *  Assumptions:  cursor is on "lastline"
692 *                for i_swap ONLY: cursor is on the previous line
693 */
694
695char swap_buffer[MAX_COLS];
696
697void
698i_swap(stats)
699
700int *stats;
701
702{
703    fputs("\nSwap: ", stdout);
704    lastline++;
705
706    /* format and print the swap summary */
707    summary_format(swap_buffer, stats, swap_names);
708    fputs(swap_buffer, stdout);
709}
710
711void
712u_swap(stats)
713
714int *stats;
715
716{
717    static char new[MAX_COLS];
718
719    /* format the new line */
720    summary_format(new, stats, swap_names);
721    line_update(swap_buffer, new, x_swap, y_swap);
722}
723
724/*
725 *  *_message() - print the next pending message line, or erase the one
726 *                that is there.
727 *
728 *  Note that u_message is (currently) the same as i_message.
729 *
730 *  Assumptions:  lastline is consistent
731 */
732
733/*
734 *  i_message is funny because it gets its message asynchronously (with
735 *	respect to screen updates).
736 */
737
738static char next_msg[MAX_COLS + 5];
739static int msglen = 0;
740/* Invariant: msglen is always the length of the message currently displayed
741   on the screen (even when next_msg doesn't contain that message). */
742
743void
744i_message()
745
746{
747    while (lastline < y_message)
748    {
749	fputc('\n', stdout);
750	lastline++;
751    }
752    if (next_msg[0] != '\0')
753    {
754	standout(next_msg);
755	msglen = strlen(next_msg);
756	next_msg[0] = '\0';
757    }
758    else if (msglen > 0)
759    {
760	(void) clear_eol(msglen);
761	msglen = 0;
762    }
763}
764
765void
766u_message()
767
768{
769    i_message();
770}
771
772static int header_length;
773
774/*
775 * Trim a header string to the current display width and return a newly
776 * allocated area with the trimmed header.
777 */
778
779char *
780trim_header(text)
781
782char *text;
783
784{
785	char *s;
786	int width;
787
788	s = NULL;
789	width = display_width;
790	header_length = strlen(text);
791	if (header_length >= width) {
792		s = malloc((width + 1) * sizeof(char));
793		if (s == NULL)
794			return (NULL);
795		strncpy(s, text, width);
796		s[width] = '\0';
797	}
798	return (s);
799}
800
801/*
802 *  *_header(text) - print the header for the process area
803 *
804 *  Assumptions:  cursor is on the previous line and lastline is consistent
805 */
806
807void
808i_header(text)
809
810char *text;
811
812{
813    char *s;
814
815    s = trim_header(text);
816    if (s != NULL)
817	text = s;
818
819    if (header_status == ON)
820    {
821	putchar('\n');
822	fputs(text, stdout);
823	lastline++;
824    }
825    else if (header_status == ERASE)
826    {
827	header_status = OFF;
828    }
829    free(s);
830}
831
832/*ARGSUSED*/
833void
834u_header(text)
835
836char *text __unused;		/* ignored */
837
838{
839
840    if (header_status == ERASE)
841    {
842	putchar('\n');
843	lastline++;
844	clear_eol(header_length);
845	header_status = OFF;
846    }
847}
848
849/*
850 *  *_process(line, thisline) - print one process line
851 *
852 *  Assumptions:  lastline is consistent
853 */
854
855void
856i_process(line, thisline)
857
858int line;
859char *thisline;
860
861{
862    register char *p;
863    register char *base;
864
865    /* make sure we are on the correct line */
866    while (lastline < y_procs + line)
867    {
868	putchar('\n');
869	lastline++;
870    }
871
872    /* truncate the line to conform to our current screen width */
873    thisline[display_width] = '\0';
874
875    /* write the line out */
876    fputs(thisline, stdout);
877
878    /* copy it in to our buffer */
879    base = smart_terminal ? screenbuf + lineindex(line) : screenbuf;
880    p = strecpy(base, thisline);
881
882    /* zero fill the rest of it */
883    memzero(p, display_width - (p - base));
884}
885
886void
887u_process(line, newline)
888
889int line;
890char *newline;
891
892{
893    register char *optr;
894    register int screen_line = line + Header_lines;
895    register char *bufferline;
896
897    /* remember a pointer to the current line in the screen buffer */
898    bufferline = &screenbuf[lineindex(line)];
899
900    /* truncate the line to conform to our current screen width */
901    newline[display_width] = '\0';
902
903    /* is line higher than we went on the last display? */
904    if (line >= last_hi)
905    {
906	/* yes, just ignore screenbuf and write it out directly */
907	/* get positioned on the correct line */
908	if (screen_line - lastline == 1)
909	{
910	    putchar('\n');
911	    lastline++;
912	}
913	else
914	{
915	    Move_to(0, screen_line);
916	    lastline = screen_line;
917	}
918
919	/* now write the line */
920	fputs(newline, stdout);
921
922	/* copy it in to the buffer */
923	optr = strecpy(bufferline, newline);
924
925	/* zero fill the rest of it */
926	memzero(optr, display_width - (optr - bufferline));
927    }
928    else
929    {
930	line_update(bufferline, newline, 0, line + Header_lines);
931    }
932}
933
934void
935u_endscreen(hi)
936
937int hi;
938
939{
940    register int screen_line = hi + Header_lines;
941    register int i;
942
943    if (smart_terminal)
944    {
945	if (hi < last_hi)
946	{
947	    /* need to blank the remainder of the screen */
948	    /* but only if there is any screen left below this line */
949	    if (lastline + 1 < screen_length)
950	    {
951		/* efficiently move to the end of currently displayed info */
952		if (screen_line - lastline < 5)
953		{
954		    while (lastline < screen_line)
955		    {
956			putchar('\n');
957			lastline++;
958		    }
959		}
960		else
961		{
962		    Move_to(0, screen_line);
963		    lastline = screen_line;
964		}
965
966		if (clear_to_end)
967		{
968		    /* we can do this the easy way */
969		    putcap(clear_to_end);
970		}
971		else
972		{
973		    /* use clear_eol on each line */
974		    i = hi;
975		    while ((void) clear_eol(strlen(&screenbuf[lineindex(i++)])), i < last_hi)
976		    {
977			putchar('\n');
978		    }
979		}
980	    }
981	}
982	last_hi = hi;
983
984	/* move the cursor to a pleasant place */
985	Move_to(x_idlecursor, y_idlecursor);
986	lastline = y_idlecursor;
987    }
988    else
989    {
990	/* separate this display from the next with some vertical room */
991	fputs("\n\n", stdout);
992    }
993}
994
995void
996display_header(t)
997
998int t;
999
1000{
1001    if (t)
1002    {
1003	header_status = ON;
1004    }
1005    else if (header_status == ON)
1006    {
1007	header_status = ERASE;
1008    }
1009}
1010
1011/*VARARGS2*/
1012void
1013new_message(type, msgfmt, a1, a2, a3)
1014
1015int type;
1016char *msgfmt;
1017caddr_t a1, a2, a3;
1018
1019{
1020    register int i;
1021
1022    /* first, format the message */
1023    (void) snprintf(next_msg, sizeof(next_msg), msgfmt, a1, a2, a3);
1024
1025    if (msglen > 0)
1026    {
1027	/* message there already -- can we clear it? */
1028	if (!overstrike)
1029	{
1030	    /* yes -- write it and clear to end */
1031	    i = strlen(next_msg);
1032	    if ((type & MT_delayed) == 0)
1033	    {
1034		type & MT_standout ? standout(next_msg) :
1035		                     fputs(next_msg, stdout);
1036		(void) clear_eol(msglen - i);
1037		msglen = i;
1038		next_msg[0] = '\0';
1039	    }
1040	}
1041    }
1042    else
1043    {
1044	if ((type & MT_delayed) == 0)
1045	{
1046	    type & MT_standout ? standout(next_msg) : fputs(next_msg, stdout);
1047	    msglen = strlen(next_msg);
1048	    next_msg[0] = '\0';
1049	}
1050    }
1051}
1052
1053void
1054clear_message()
1055
1056{
1057    if (clear_eol(msglen) == 1)
1058    {
1059	putchar('\r');
1060    }
1061}
1062
1063int
1064readline(buffer, size, numeric)
1065
1066char *buffer;
1067int  size;
1068int  numeric;
1069
1070{
1071    register char *ptr = buffer;
1072    register char ch;
1073    register char cnt = 0;
1074    register char maxcnt = 0;
1075
1076    /* allow room for null terminator */
1077    size -= 1;
1078
1079    /* read loop */
1080    while ((fflush(stdout), read(0, ptr, 1) > 0))
1081    {
1082	/* newline means we are done */
1083	if ((ch = *ptr) == '\n' || ch == '\r')
1084	{
1085	    break;
1086	}
1087
1088	/* handle special editing characters */
1089	if (ch == ch_kill)
1090	{
1091	    /* kill line -- account for overstriking */
1092	    if (overstrike)
1093	    {
1094		msglen += maxcnt;
1095	    }
1096
1097	    /* return null string */
1098	    *buffer = '\0';
1099	    putchar('\r');
1100	    return(-1);
1101	}
1102	else if (ch == ch_erase)
1103	{
1104	    /* erase previous character */
1105	    if (cnt <= 0)
1106	    {
1107		/* none to erase! */
1108		putchar('\7');
1109	    }
1110	    else
1111	    {
1112		fputs("\b \b", stdout);
1113		ptr--;
1114		cnt--;
1115	    }
1116	}
1117	/* check for character validity and buffer overflow */
1118	else if (cnt == size || (numeric && !isdigit(ch)) ||
1119		!isprint(ch))
1120	{
1121	    /* not legal */
1122	    putchar('\7');
1123	}
1124	else
1125	{
1126	    /* echo it and store it in the buffer */
1127	    putchar(ch);
1128	    ptr++;
1129	    cnt++;
1130	    if (cnt > maxcnt)
1131	    {
1132		maxcnt = cnt;
1133	    }
1134	}
1135    }
1136
1137    /* all done -- null terminate the string */
1138    *ptr = '\0';
1139
1140    /* account for the extra characters in the message area */
1141    /* (if terminal overstrikes, remember the furthest they went) */
1142    msglen += overstrike ? maxcnt : cnt;
1143
1144    /* return either inputted number or string length */
1145    putchar('\r');
1146    return(cnt == 0 ? -1 : numeric ? atoi(buffer) : cnt);
1147}
1148
1149/* internal support routines */
1150
1151static int string_count(pp)
1152
1153register char **pp;
1154
1155{
1156    register int cnt;
1157
1158    cnt = 0;
1159    while (*pp++ != NULL)
1160    {
1161	cnt++;
1162    }
1163    return(cnt);
1164}
1165
1166static void summary_format(str, numbers, names)
1167
1168char *str;
1169int *numbers;
1170register char **names;
1171
1172{
1173    register char *p;
1174    register int num;
1175    register char *thisname;
1176    register int useM = No;
1177
1178    /* format each number followed by its string */
1179    p = str;
1180    while ((thisname = *names++) != NULL)
1181    {
1182	/* get the number to format */
1183	num = *numbers++;
1184
1185	/* display only non-zero numbers */
1186	if (num > 0)
1187	{
1188	    /* is this number in kilobytes? */
1189	    if (thisname[0] == 'K')
1190	    {
1191		/* yes: format it as a memory value */
1192		p = strecpy(p, format_k(num));
1193
1194		/* skip over the K, since it was included by format_k */
1195		p = strecpy(p, thisname+1);
1196	    }
1197	    else
1198	    {
1199		p = strecpy(p, itoa(num));
1200		p = strecpy(p, thisname);
1201	    }
1202	}
1203
1204	/* ignore negative numbers, but display corresponding string */
1205	else if (num < 0)
1206	{
1207	    p = strecpy(p, thisname);
1208	}
1209    }
1210
1211    /* if the last two characters in the string are ", ", delete them */
1212    p -= 2;
1213    if (p >= str && p[0] == ',' && p[1] == ' ')
1214    {
1215	*p = '\0';
1216    }
1217}
1218
1219static void line_update(old, new, start, line)
1220
1221register char *old;
1222register char *new;
1223int start;
1224int line;
1225
1226{
1227    register int ch;
1228    register int diff;
1229    register int newcol = start + 1;
1230    register int lastcol = start;
1231    char cursor_on_line = No;
1232    char *current;
1233
1234    /* compare the two strings and only rewrite what has changed */
1235    current = old;
1236#ifdef DEBUG
1237    fprintf(debug, "line_update, starting at %d\n", start);
1238    fputs(old, debug);
1239    fputc('\n', debug);
1240    fputs(new, debug);
1241    fputs("\n-\n", debug);
1242#endif
1243
1244    /* start things off on the right foot		    */
1245    /* this is to make sure the invariants get set up right */
1246    if ((ch = *new++) != *old)
1247    {
1248	if (line - lastline == 1 && start == 0)
1249	{
1250	    putchar('\n');
1251	}
1252	else
1253	{
1254	    Move_to(start, line);
1255	}
1256	cursor_on_line = Yes;
1257	putchar(ch);
1258	*old = ch;
1259	lastcol = 1;
1260    }
1261    old++;
1262
1263    /*
1264     *  main loop -- check each character.  If the old and new aren't the
1265     *	same, then update the display.  When the distance from the
1266     *	current cursor position to the new change is small enough,
1267     *	the characters that belong there are written to move the
1268     *	cursor over.
1269     *
1270     *	Invariants:
1271     *	    lastcol is the column where the cursor currently is sitting
1272     *		(always one beyond the end of the last mismatch).
1273     */
1274    do		/* yes, a do...while */
1275    {
1276	if ((ch = *new++) != *old)
1277	{
1278	    /* new character is different from old	  */
1279	    /* make sure the cursor is on top of this character */
1280	    diff = newcol - lastcol;
1281	    if (diff > 0)
1282	    {
1283		/* some motion is required--figure out which is shorter */
1284		if (diff < 6 && cursor_on_line)
1285		{
1286		    /* overwrite old stuff--get it out of the old buffer */
1287		    printf("%.*s", diff, &current[lastcol-start]);
1288		}
1289		else
1290		{
1291		    /* use cursor addressing */
1292		    Move_to(newcol, line);
1293		    cursor_on_line = Yes;
1294		}
1295		/* remember where the cursor is */
1296		lastcol = newcol + 1;
1297	    }
1298	    else
1299	    {
1300		/* already there, update position */
1301		lastcol++;
1302	    }
1303
1304	    /* write what we need to */
1305	    if (ch == '\0')
1306	    {
1307		/* at the end--terminate with a clear-to-end-of-line */
1308		(void) clear_eol(strlen(old));
1309	    }
1310	    else
1311	    {
1312		/* write the new character */
1313		putchar(ch);
1314	    }
1315	    /* put the new character in the screen buffer */
1316	    *old = ch;
1317	}
1318
1319	/* update working column and screen buffer pointer */
1320	newcol++;
1321	old++;
1322
1323    } while (ch != '\0');
1324
1325    /* zero out the rest of the line buffer -- MUST BE DONE! */
1326    diff = display_width - newcol;
1327    if (diff > 0)
1328    {
1329	memzero(old, diff);
1330    }
1331
1332    /* remember where the current line is */
1333    if (cursor_on_line)
1334    {
1335	lastline = line;
1336    }
1337}
1338
1339/*
1340 *  printable(str) - make the string pointed to by "str" into one that is
1341 *	printable (i.e.: all ascii), by converting all non-printable
1342 *	characters into '?'.  Replacements are done in place and a pointer
1343 *	to the original buffer is returned.
1344 */
1345
1346char *printable(str)
1347
1348char *str;
1349
1350{
1351    register char *ptr;
1352    register char ch;
1353
1354    ptr = str;
1355    while ((ch = *ptr) != '\0')
1356    {
1357	if (!isprint(ch))
1358	{
1359	    *ptr = '?';
1360	}
1361	ptr++;
1362    }
1363    return(str);
1364}
1365
1366void
1367i_uptime(bt, tod)
1368
1369struct timeval* bt;
1370time_t *tod;
1371
1372{
1373    time_t uptime;
1374    int days, hrs, mins, secs;
1375
1376    if (bt->tv_sec != -1) {
1377	uptime = *tod - bt->tv_sec;
1378	days = uptime / 86400;
1379	uptime %= 86400;
1380	hrs = uptime / 3600;
1381	uptime %= 3600;
1382	mins = uptime / 60;
1383	secs = uptime % 60;
1384
1385	/*
1386	 *  Display the uptime.
1387	 */
1388
1389	if (smart_terminal)
1390	{
1391	    Move_to((screen_width - 24) - (days > 9 ? 1 : 0), 0);
1392	}
1393	else
1394	{
1395	    fputs(" ", stdout);
1396	}
1397	printf(" up %d+%02d:%02d:%02d", days, hrs, mins, secs);
1398    }
1399}
1400