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