Annotation of src/usr.bin/top/display.c, Revision 1.8
1.8 ! mpech 1: /* $OpenBSD: display.c,v 1.7 2001/09/03 18:08:10 camield Exp $ */
1.1 downsj 2:
3: /*
4: * Top users/processes display for Unix
5: * Version 3
6: *
7: * This program may be freely redistributed,
8: * but this entire comment MUST remain intact.
9: *
10: * Copyright (c) 1984, 1989, William LeFebvre, Rice University
11: * Copyright (c) 1989, 1990, 1992, William LeFebvre, Northwestern University
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:
1.2 downsj 31: #include <sys/types.h>
32: #include <stdio.h>
1.1 downsj 33: #include <ctype.h>
1.2 downsj 34: #include <stdlib.h>
35: #include <string.h>
36: #include <term.h>
1.1 downsj 37: #include <time.h>
1.2 downsj 38: #include <unistd.h>
1.1 downsj 39:
40: #include "screen.h" /* interface to screen package */
41: #include "layout.h" /* defines for screen position layout */
42: #include "display.h"
43: #include "top.h"
44: #include "top.local.h"
45: #include "boolean.h"
46: #include "machine.h" /* we should eliminate this!!! */
47: #include "utils.h"
48:
49: #ifdef DEBUG
50: FILE *debug;
51: #endif
52:
53: static int lmpid = 0;
54: static int last_hi = 0; /* used in u_process and u_endscreen */
55: static int lastline = 0;
56: static int display_width = MAX_COLS;
57:
1.2 downsj 58: static char *cpustates_tag __P((void));
59: static int string_count __P((char **));
1.4 millert 60: static void summary_format __P((char *, int *, char **));
1.2 downsj 61: static void line_update __P((char *, char *, int, int));
62:
1.1 downsj 63: #define lineindex(l) ((l)*display_width)
64:
65: /* things initialized by display_init and used thruout */
66:
67: /* buffer of proc information lines for display updating */
68: char *screenbuf = NULL;
69:
70: static char **procstate_names;
71: static char **cpustate_names;
72: static char **memory_names;
73:
74: static int num_procstates;
75: static int num_cpustates;
76: static int num_memory;
77:
78: static int *lprocstates;
79: static int *lcpustates;
80: static int *lmemory;
81:
82: static int *cpustate_columns;
83: static int cpustate_total_length;
84:
85: static enum { OFF, ON, ERASE } header_status = ON;
86:
87: static int string_count();
88: static void summary_format();
89: static void line_update();
90:
91: int display_resize()
92:
93: {
1.8 ! mpech 94: int display_lines;
1.1 downsj 95:
96: /* first, deallocate any previous buffer that may have been there */
97: if (screenbuf != NULL)
98: {
99: free(screenbuf);
100: }
101:
102: /* calculate the current dimensions */
103: /* if operating in "dumb" mode, we only need one line */
1.2 downsj 104: display_lines = smart_terminal ? screen_length - Header_lines : 1;
1.1 downsj 105:
106: /* we don't want more than MAX_COLS columns, since the machine-dependent
107: modules make static allocations based on MAX_COLS and we don't want
108: to run off the end of their buffers */
109: display_width = screen_width;
110: if (display_width >= MAX_COLS)
111: {
112: display_width = MAX_COLS - 1;
113: }
114:
115: /* now, allocate space for the screen buffer */
1.2 downsj 116: screenbuf = (char *)malloc(display_lines * display_width);
1.1 downsj 117: if (screenbuf == (char *)NULL)
118: {
119: /* oops! */
120: return(-1);
121: }
122:
123: /* return number of lines available */
124: /* for dumb terminals, pretend like we can show any amount */
1.2 downsj 125: return(smart_terminal ? display_lines : Largest);
1.1 downsj 126: }
127:
128: int display_init(statics)
129:
130: struct statics *statics;
131:
132: {
1.8 ! mpech 133: int display_lines;
! 134: char **pp;
! 135: int *ip;
! 136: int i;
1.1 downsj 137:
138: /* call resize to do the dirty work */
1.2 downsj 139: display_lines = display_resize();
1.1 downsj 140:
141: /* only do the rest if we need to */
1.2 downsj 142: if (display_lines > -1)
1.1 downsj 143: {
144: /* save pointers and allocate space for names */
145: procstate_names = statics->procstate_names;
146: num_procstates = string_count(procstate_names);
147: lprocstates = (int *)malloc(num_procstates * sizeof(int));
148:
149: cpustate_names = statics->cpustate_names;
150: num_cpustates = string_count(cpustate_names);
151: lcpustates = (int *)malloc(num_cpustates * sizeof(int));
152: cpustate_columns = (int *)malloc(num_cpustates * sizeof(int));
153:
154: memory_names = statics->memory_names;
155: num_memory = string_count(memory_names);
156: lmemory = (int *)malloc(num_memory * sizeof(int));
157:
158: /* calculate starting columns where needed */
159: cpustate_total_length = 0;
160: pp = cpustate_names;
161: ip = cpustate_columns;
162: while (*pp != NULL)
163: {
164: if ((i = strlen(*pp++)) > 0)
165: {
166: *ip++ = cpustate_total_length;
167: cpustate_total_length += i + 8;
168: }
169: }
170: }
171:
172: /* return number of lines available */
1.2 downsj 173: return(display_lines);
1.1 downsj 174: }
175:
1.2 downsj 176: void i_loadave(mpid, avenrun)
1.1 downsj 177:
178: int mpid;
179: double *avenrun;
180:
181: {
1.8 ! mpech 182: int i;
1.1 downsj 183:
184: /* i_loadave also clears the screen, since it is first */
185: clear();
186:
187: /* mpid == -1 implies this system doesn't have an _mpid */
188: if (mpid != -1)
189: {
190: printf("last pid: %5d; ", mpid);
191: }
192:
193: printf("load averages");
194:
195: for (i = 0; i < 3; i++)
196: {
197: printf("%c %5.2f",
198: i == 0 ? ':' : ',',
199: avenrun[i]);
200: }
201: lmpid = mpid;
202: }
203:
1.2 downsj 204: void u_loadave(mpid, avenrun)
1.1 downsj 205:
206: int mpid;
207: double *avenrun;
208:
209: {
1.8 ! mpech 210: int i;
1.1 downsj 211:
212: if (mpid != -1)
213: {
214: /* change screen only when value has really changed */
215: if (mpid != lmpid)
216: {
217: Move_to(x_lastpid, y_lastpid);
218: printf("%5d", mpid);
219: lmpid = mpid;
220: }
221:
222: /* i remembers x coordinate to move to */
223: i = x_loadave;
224: }
225: else
226: {
227: i = x_loadave_nompid;
228: }
229:
230: /* move into position for load averages */
231: Move_to(i, y_loadave);
232:
233: /* display new load averages */
234: /* we should optimize this and only display changes */
235: for (i = 0; i < 3; i++)
236: {
237: printf("%s%5.2f",
238: i == 0 ? "" : ", ",
239: avenrun[i]);
240: }
241: }
242:
1.2 downsj 243: void i_timeofday(tod)
1.1 downsj 244:
245: time_t *tod;
246:
247: {
248: /*
249: * Display the current time.
250: * "ctime" always returns a string that looks like this:
251: *
252: * Sun Sep 16 01:03:52 1973
253: * 012345678901234567890123
254: * 1 2
255: *
256: * We want indices 11 thru 18 (length 8).
257: */
258:
259: if (smart_terminal)
260: {
261: Move_to(screen_width - 8, 0);
262: }
263: else
264: {
1.5 deraadt 265: if (fputs(" ", stdout) == EOF)
266: exit(1);
1.1 downsj 267: }
268: #ifdef DEBUG
269: {
270: char *foo;
271: foo = ctime(tod);
1.5 deraadt 272: if (fputs(foo, stdout) == EOF)
273: exit(1);
1.1 downsj 274: }
275: #endif
276: printf("%-8.8s\n", &(ctime(tod)[11]));
277: lastline = 1;
278: }
279:
280: static int ltotal = 0;
281: static char procstates_buffer[128];
282:
283: /*
284: * *_procstates(total, brkdn, names) - print the process summary line
285: *
286: * Assumptions: cursor is at the beginning of the line on entry
287: * lastline is valid
288: */
289:
1.2 downsj 290: void i_procstates(total, brkdn)
1.1 downsj 291:
292: int total;
293: int *brkdn;
294:
295: {
1.8 ! mpech 296: int i;
1.1 downsj 297:
298: /* write current number of processes and remember the value */
299: printf("%d processes:", total);
300: ltotal = total;
301:
302: /* put out enough spaces to get to column 15 */
303: i = digits(total);
304: while (i++ < 4)
305: {
1.5 deraadt 306: if (putchar(' ') == EOF)
307: exit(1);
1.1 downsj 308: }
309:
310: /* format and print the process state summary */
1.4 millert 311: summary_format(procstates_buffer, brkdn, procstate_names);
1.5 deraadt 312: if (fputs(procstates_buffer, stdout) == EOF)
313: exit(1);
1.1 downsj 314:
315: /* save the numbers for next time */
316: memcpy(lprocstates, brkdn, num_procstates * sizeof(int));
317: }
318:
1.2 downsj 319: void u_procstates(total, brkdn)
1.1 downsj 320:
321: int total;
322: int *brkdn;
323:
324: {
325: static char new[128];
1.8 ! mpech 326: int i;
1.1 downsj 327:
328: /* update number of processes only if it has changed */
329: if (ltotal != total)
330: {
331: /* move and overwrite */
332: #if (x_procstate == 0)
333: Move_to(x_procstate, y_procstate);
334: #else
335: /* cursor is already there...no motion needed */
336: /* assert(lastline == 1); */
337: #endif
338: printf("%d", total);
339:
340: /* if number of digits differs, rewrite the label */
341: if (digits(total) != digits(ltotal))
342: {
1.5 deraadt 343: if (fputs(" processes:", stdout) == EOF)
344: exit(1);
1.1 downsj 345: /* put out enough spaces to get to column 15 */
346: i = digits(total);
347: while (i++ < 4)
348: {
1.5 deraadt 349: if (putchar(' ') == EOF)
350: exit(1);
1.1 downsj 351: }
352: /* cursor may end up right where we want it!!! */
353: }
354:
355: /* save new total */
356: ltotal = total;
357: }
358:
359: /* see if any of the state numbers has changed */
360: if (memcmp(lprocstates, brkdn, num_procstates * sizeof(int)) != 0)
361: {
362: /* format and update the line */
1.4 millert 363: summary_format(new, brkdn, procstate_names);
1.1 downsj 364: line_update(procstates_buffer, new, x_brkdn, y_brkdn);
365: memcpy(lprocstates, brkdn, num_procstates * sizeof(int));
366: }
367: }
368:
369: /*
370: * *_cpustates(states, names) - print the cpu state percentages
371: *
372: * Assumptions: cursor is on the PREVIOUS line
373: */
374:
375: static int cpustates_column;
376:
377: /* cpustates_tag() calculates the correct tag to use to label the line */
378:
1.2 downsj 379: static char *cpustates_tag()
1.1 downsj 380:
381: {
1.8 ! mpech 382: char *use;
1.1 downsj 383:
384: static char *short_tag = "CPU: ";
385: static char *long_tag = "CPU states: ";
386:
387: /* if length + strlen(long_tag) >= screen_width, then we have to
388: use the shorter tag (we subtract 2 to account for ": ") */
389: if (cpustate_total_length + (int)strlen(long_tag) - 2 >= screen_width)
390: {
391: use = short_tag;
392: }
393: else
394: {
395: use = long_tag;
396: }
397:
398: /* set cpustates_column accordingly then return result */
399: cpustates_column = strlen(use);
400: return(use);
401: }
402:
1.2 downsj 403: void i_cpustates(states)
1.1 downsj 404:
1.8 ! mpech 405: int *states;
1.1 downsj 406:
407: {
1.8 ! mpech 408: int i = 0;
! 409: int value;
! 410: char **names = cpustate_names;
! 411: char *thisname;
1.1 downsj 412:
413: /* print tag and bump lastline */
414: printf("\n%s", cpustates_tag());
415: lastline++;
416:
417: /* now walk thru the names and print the line */
418: while ((thisname = *names++) != NULL)
419: {
420: if (*thisname != '\0')
421: {
422: /* retrieve the value and remember it */
423: value = *states++;
424:
425: /* if percentage is >= 1000, print it as 100% */
426: printf((value >= 1000 ? "%s%4.0f%% %s" : "%s%4.1f%% %s"),
427: i++ == 0 ? "" : ", ",
428: ((float)value)/10.,
429: thisname);
430: }
431: }
432:
433: /* copy over values into "last" array */
434: memcpy(lcpustates, states, num_cpustates * sizeof(int));
435: }
436:
1.2 downsj 437: void u_cpustates(states)
1.1 downsj 438:
1.8 ! mpech 439: int *states;
1.1 downsj 440:
441: {
1.8 ! mpech 442: int value;
! 443: char **names = cpustate_names;
! 444: char *thisname;
! 445: int *lp;
! 446: int *colp;
1.1 downsj 447:
448: Move_to(cpustates_column, y_cpustates);
449: lastline = y_cpustates;
450: lp = lcpustates;
451: colp = cpustate_columns;
452:
453: /* we could be much more optimal about this */
454: while ((thisname = *names++) != NULL)
455: {
456: if (*thisname != '\0')
457: {
458: /* did the value change since last time? */
459: if (*lp != *states)
460: {
461: /* yes, move and change */
462: Move_to(cpustates_column + *colp, y_cpustates);
463: lastline = y_cpustates;
464:
465: /* retrieve value and remember it */
466: value = *states;
467:
468: /* if percentage is >= 1000, print it as 100% */
469: printf((value >= 1000 ? "%4.0f" : "%4.1f"),
470: ((double)value)/10.);
471:
472: /* remember it for next time */
473: *lp = *states;
474: }
475: }
476:
477: /* increment and move on */
478: lp++;
479: states++;
480: colp++;
481: }
482: }
483:
1.2 downsj 484: void z_cpustates()
1.1 downsj 485:
486: {
1.8 ! mpech 487: int i = 0;
! 488: char **names = cpustate_names;
! 489: char *thisname;
! 490: int *lp;
1.1 downsj 491:
492: /* show tag and bump lastline */
493: printf("\n%s", cpustates_tag());
494: lastline++;
495:
496: while ((thisname = *names++) != NULL)
497: {
498: if (*thisname != '\0')
499: {
500: printf("%s %% %s", i++ == 0 ? "" : ", ", thisname);
501: }
502: }
503:
504: /* fill the "last" array with all -1s, to insure correct updating */
505: lp = lcpustates;
506: i = num_cpustates;
507: while (--i >= 0)
508: {
509: *lp++ = -1;
510: }
511: }
512:
513: /*
514: * *_memory(stats) - print "Memory: " followed by the memory summary string
515: *
516: * Assumptions: cursor is on "lastline"
517: * for i_memory ONLY: cursor is on the previous line
518: */
519:
1.2 downsj 520: static char memory_buffer[MAX_COLS];
1.1 downsj 521:
1.2 downsj 522: void i_memory(stats)
1.1 downsj 523:
524: int *stats;
525:
526: {
1.5 deraadt 527: if (fputs("\nMemory: ", stdout) == EOF)
528: exit(1);
1.1 downsj 529: lastline++;
530:
531: /* format and print the memory summary */
1.4 millert 532: summary_format(memory_buffer, stats, memory_names);
1.5 deraadt 533: if (fputs(memory_buffer, stdout) == EOF)
534: exit(1);
1.1 downsj 535: }
536:
1.2 downsj 537: void u_memory(stats)
1.1 downsj 538:
539: int *stats;
540:
541: {
542: static char new[MAX_COLS];
543:
544: /* format the new line */
1.4 millert 545: summary_format(new, stats, memory_names);
1.1 downsj 546: line_update(memory_buffer, new, x_mem, y_mem);
547: }
548:
549: /*
550: * *_message() - print the next pending message line, or erase the one
551: * that is there.
552: *
553: * Note that u_message is (currently) the same as i_message.
554: *
555: * Assumptions: lastline is consistent
556: */
557:
558: /*
559: * i_message is funny because it gets its message asynchronously (with
560: * respect to screen updates).
561: */
562:
563: static char next_msg[MAX_COLS + 5];
564: static int msglen = 0;
565: /* Invariant: msglen is always the length of the message currently displayed
566: on the screen (even when next_msg doesn't contain that message). */
567:
1.2 downsj 568: void i_message()
1.1 downsj 569:
570: {
571: while (lastline < y_message)
572: {
1.5 deraadt 573: if (fputc('\n', stdout) == EOF)
574: exit(1);
1.1 downsj 575: lastline++;
576: }
577: if (next_msg[0] != '\0')
578: {
579: standout(next_msg);
580: msglen = strlen(next_msg);
581: next_msg[0] = '\0';
582: }
583: else if (msglen > 0)
584: {
585: (void) clear_eol(msglen);
586: msglen = 0;
587: }
588: }
589:
1.2 downsj 590: void u_message()
1.1 downsj 591:
592: {
593: i_message();
594: }
595:
596: static int header_length;
597:
598: /*
599: * *_header(text) - print the header for the process area
600: *
601: * Assumptions: cursor is on the previous line and lastline is consistent
602: */
603:
1.2 downsj 604: void i_header(text)
1.1 downsj 605:
606: char *text;
607:
608: {
609: header_length = strlen(text);
610: if (header_status == ON)
611: {
1.5 deraadt 612: if (putchar('\n') == EOF)
613: exit(1);
614: if (fputs(text, stdout) == EOF)
615: exit(1);
1.1 downsj 616: lastline++;
617: }
618: else if (header_status == ERASE)
619: {
620: header_status = OFF;
621: }
622: }
623:
624: /*ARGSUSED*/
1.2 downsj 625: void u_header(text)
1.1 downsj 626:
627: char *text; /* ignored */
628:
629: {
630: if (header_status == ERASE)
631: {
1.5 deraadt 632: if (putchar('\n') == EOF)
633: exit(1);
1.1 downsj 634: lastline++;
635: clear_eol(header_length);
636: header_status = OFF;
637: }
638: }
639:
640: /*
641: * *_process(line, thisline) - print one process line
642: *
643: * Assumptions: lastline is consistent
644: */
645:
1.2 downsj 646: void i_process(line, thisline)
1.1 downsj 647:
648: int line;
649: char *thisline;
650:
651: {
1.8 ! mpech 652: char *p;
! 653: char *base;
1.1 downsj 654:
655: /* make sure we are on the correct line */
656: while (lastline < y_procs + line)
657: {
1.5 deraadt 658: if (putchar('\n') == EOF)
659: exit(1);
1.1 downsj 660: lastline++;
661: }
662:
663: /* truncate the line to conform to our current screen width */
664: thisline[display_width] = '\0';
665:
666: /* write the line out */
1.5 deraadt 667: if (fputs(thisline, stdout) == EOF)
668: exit(1);
1.1 downsj 669:
670: /* copy it in to our buffer */
671: base = smart_terminal ? screenbuf + lineindex(line) : screenbuf;
672: p = strecpy(base, thisline);
673:
674: /* zero fill the rest of it */
1.2 downsj 675: memset(p, 0, display_width - (p - base));
1.1 downsj 676: }
677:
1.2 downsj 678: void u_process(linenum, linebuf)
1.1 downsj 679:
1.2 downsj 680: int linenum;
681: char *linebuf;
1.1 downsj 682:
683: {
1.8 ! mpech 684: char *optr;
! 685: int screen_line = linenum + Header_lines;
! 686: char *bufferline;
1.1 downsj 687:
688: /* remember a pointer to the current line in the screen buffer */
1.2 downsj 689: bufferline = &screenbuf[lineindex(linenum)];
1.1 downsj 690:
691: /* truncate the line to conform to our current screen width */
1.2 downsj 692: linebuf[display_width] = '\0';
1.1 downsj 693:
694: /* is line higher than we went on the last display? */
1.2 downsj 695: if (linenum >= last_hi)
1.1 downsj 696: {
697: /* yes, just ignore screenbuf and write it out directly */
698: /* get positioned on the correct line */
699: if (screen_line - lastline == 1)
700: {
1.5 deraadt 701: if (putchar('\n') == EOF)
702: exit(1);
1.1 downsj 703: lastline++;
704: }
705: else
706: {
707: Move_to(0, screen_line);
708: lastline = screen_line;
709: }
710:
711: /* now write the line */
1.5 deraadt 712: if (fputs(linebuf, stdout) == EOF)
713: exit(1);
1.1 downsj 714:
715: /* copy it in to the buffer */
1.2 downsj 716: optr = strecpy(bufferline, linebuf);
1.1 downsj 717:
718: /* zero fill the rest of it */
1.2 downsj 719: memset(optr, 0, display_width - (optr - bufferline));
1.1 downsj 720: }
721: else
722: {
1.2 downsj 723: line_update(bufferline, linebuf, 0, linenum + Header_lines);
1.1 downsj 724: }
725: }
726:
1.2 downsj 727: void u_endscreen(hi)
1.1 downsj 728:
1.8 ! mpech 729: int hi;
1.1 downsj 730:
731: {
1.8 ! mpech 732: int screen_line = hi + Header_lines;
! 733: int i;
1.1 downsj 734:
735: if (smart_terminal)
736: {
737: if (hi < last_hi)
738: {
739: /* need to blank the remainder of the screen */
740: /* but only if there is any screen left below this line */
741: if (lastline + 1 < screen_length)
742: {
743: /* efficiently move to the end of currently displayed info */
744: if (screen_line - lastline < 5)
745: {
746: while (lastline < screen_line)
747: {
1.5 deraadt 748: if (putchar('\n') == EOF)
749: exit(1);
1.1 downsj 750: lastline++;
751: }
752: }
753: else
754: {
755: Move_to(0, screen_line);
756: lastline = screen_line;
757: }
758:
759: if (clear_to_end)
760: {
761: /* we can do this the easy way */
762: putcap(clear_to_end);
763: }
764: else
765: {
766: /* use clear_eol on each line */
767: i = hi;
768: while ((void) clear_eol(strlen(&screenbuf[lineindex(i++)])), i < last_hi)
769: {
1.5 deraadt 770: if (putchar('\n') == EOF)
771: exit(1);
1.1 downsj 772: }
773: }
774: }
775: }
776: last_hi = hi;
777:
778: /* move the cursor to a pleasant place */
779: Move_to(x_idlecursor, y_idlecursor);
780: lastline = y_idlecursor;
781: }
782: else
783: {
784: /* separate this display from the next with some vertical room */
1.5 deraadt 785: if (fputs("\n\n", stdout) == EOF)
786: exit(1);
1.1 downsj 787: }
788: }
789:
1.2 downsj 790: void display_header(t)
1.1 downsj 791:
792: int t;
793:
794: {
795: if (t)
796: {
797: header_status = ON;
798: }
799: else if (header_status == ON)
800: {
801: header_status = ERASE;
802: }
803: }
804:
805: /*VARARGS2*/
1.2 downsj 806: void new_message(type, msgfmt, a1, a2, a3)
1.1 downsj 807:
808: int type;
809: char *msgfmt;
810: caddr_t a1, a2, a3;
811:
812: {
1.8 ! mpech 813: int i;
1.1 downsj 814:
815: /* first, format the message */
816: (void) snprintf(next_msg, sizeof(next_msg), msgfmt, a1, a2, a3);
817:
818: if (msglen > 0)
819: {
820: /* message there already -- can we clear it? */
821: if (!overstrike)
822: {
823: /* yes -- write it and clear to end */
824: i = strlen(next_msg);
825: if ((type & MT_delayed) == 0)
826: {
1.5 deraadt 827: if (type & MT_standout)
828: standout(next_msg);
829: else {
830: if (fputs(next_msg, stdout) == EOF)
831: exit(1);
832: }
1.1 downsj 833: (void) clear_eol(msglen - i);
834: msglen = i;
835: next_msg[0] = '\0';
836: }
837: }
838: }
839: else
840: {
841: if ((type & MT_delayed) == 0)
842: {
1.5 deraadt 843: if (type & MT_standout)
844: standout(next_msg);
845: else {
846: if (fputs(next_msg, stdout) == EOF)
847: exit(1);
848: }
1.1 downsj 849: msglen = strlen(next_msg);
850: next_msg[0] = '\0';
851: }
852: }
853: }
854:
1.2 downsj 855: void clear_message()
1.1 downsj 856:
857: {
858: if (clear_eol(msglen) == 1)
859: {
1.5 deraadt 860: if (putchar('\r') == EOF)
861: exit(1);
1.1 downsj 862: }
863: }
864:
1.2 downsj 865: int readline(buffer, size, numeric)
1.1 downsj 866:
867: char *buffer;
868: int size;
869: int numeric;
870:
871: {
1.8 ! mpech 872: char *ptr = buffer;
! 873: char ch;
! 874: char cnt = 0;
! 875: char maxcnt = 0;
1.1 downsj 876:
877: /* allow room for null terminator */
878: size -= 1;
879:
880: /* read loop */
881: while ((fflush(stdout), read(0, ptr, 1) > 0))
882: {
883: /* newline means we are done */
884: if ((ch = *ptr) == '\n')
885: {
886: break;
887: }
888:
889: /* handle special editing characters */
890: if (ch == ch_kill)
891: {
892: /* kill line -- account for overstriking */
893: if (overstrike)
894: {
895: msglen += maxcnt;
896: }
897:
898: /* return null string */
899: *buffer = '\0';
1.5 deraadt 900: if (putchar('\r') == EOF)
901: exit(1);
1.1 downsj 902: return(-1);
903: }
904: else if (ch == ch_erase)
905: {
906: /* erase previous character */
907: if (cnt <= 0)
908: {
909: /* none to erase! */
1.5 deraadt 910: if (putchar('\7') == EOF)
911: exit(1);
1.1 downsj 912: }
913: else
914: {
1.5 deraadt 915: if (fputs("\b \b", stdout) == EOF)
916: exit(1);
1.1 downsj 917: ptr--;
918: cnt--;
919: }
920: }
921: /* check for character validity and buffer overflow */
922: else if (cnt == size || (numeric && !isdigit(ch)) ||
923: !isprint(ch))
924: {
925: /* not legal */
1.5 deraadt 926: if (putchar('\7') == EOF)
927: exit(1);
1.1 downsj 928: }
929: else
930: {
931: /* echo it and store it in the buffer */
1.5 deraadt 932: if (putchar(ch) == EOF)
933: exit(1);
1.1 downsj 934: ptr++;
935: cnt++;
936: if (cnt > maxcnt)
937: {
938: maxcnt = cnt;
939: }
940: }
941: }
942:
943: /* all done -- null terminate the string */
944: *ptr = '\0';
945:
946: /* account for the extra characters in the message area */
947: /* (if terminal overstrikes, remember the furthest they went) */
948: msglen += overstrike ? maxcnt : cnt;
949:
950: /* return either inputted number or string length */
1.5 deraadt 951: if (putchar('\r') == EOF)
952: exit(1);
1.1 downsj 953: return(cnt == 0 ? -1 : numeric ? atoi(buffer) : cnt);
954: }
955:
956: /* internal support routines */
957:
958: static int string_count(pp)
959:
1.8 ! mpech 960: char **pp;
1.1 downsj 961:
962: {
1.8 ! mpech 963: int cnt;
1.1 downsj 964:
965: cnt = 0;
966: while (*pp++ != NULL)
967: {
968: cnt++;
969: }
970: return(cnt);
971: }
972:
1.4 millert 973: static void summary_format(str, numbers, names)
1.1 downsj 974:
975: char *str;
976: int *numbers;
1.8 ! mpech 977: char **names;
1.1 downsj 978:
979: {
1.8 ! mpech 980: char *p;
! 981: int num;
! 982: char *thisname;
1.1 downsj 983:
984: /* format each number followed by its string */
1.4 millert 985: p = str;
1.1 downsj 986: while ((thisname = *names++) != NULL)
987: {
988: /* get the number to format */
989: num = *numbers++;
990:
1.6 art 991: if (num >= 0)
1.1 downsj 992: {
993: /* is this number in kilobytes? */
994: if (thisname[0] == 'K')
995: {
996: /* yes: format it as a memory value */
1.4 millert 997: p = strecpy(p, format_k(num));
1.1 downsj 998:
999: /* skip over the K, since it was included by format_k */
1.4 millert 1000: p = strecpy(p, thisname+1);
1.1 downsj 1001: }
1.7 camield 1002: else if (num > 0)
1.1 downsj 1003: {
1.4 millert 1004: p = strecpy(p, itoa(num));
1005: p = strecpy(p, thisname);
1.1 downsj 1006: }
1007: }
1008:
1009: /* ignore negative numbers, but display corresponding string */
1.7 camield 1010: else
1.1 downsj 1011: {
1.4 millert 1012: p = strecpy(p, thisname);
1.1 downsj 1013: }
1014: }
1015:
1016: /* if the last two characters in the string are ", ", delete them */
1.4 millert 1017: p -= 2;
1018: if (p >= str && p[0] == ',' && p[1] == ' ')
1.1 downsj 1019: {
1.4 millert 1020: *p = '\0';
1.1 downsj 1021: }
1022: }
1023:
1024: static void line_update(old, new, start, line)
1025:
1.8 ! mpech 1026: char *old;
! 1027: char *new;
1.1 downsj 1028: int start;
1029: int line;
1030:
1031: {
1.8 ! mpech 1032: int ch;
! 1033: int diff;
! 1034: int newcol = start + 1;
! 1035: int lastcol = start;
1.1 downsj 1036: char cursor_on_line = No;
1037: char *current;
1038:
1039: /* compare the two strings and only rewrite what has changed */
1040: current = old;
1041: #ifdef DEBUG
1042: fprintf(debug, "line_update, starting at %d\n", start);
1043: fputs(old, debug);
1044: fputc('\n', debug);
1045: fputs(new, debug);
1046: fputs("\n-\n", debug);
1047: #endif
1048:
1049: /* start things off on the right foot */
1050: /* this is to make sure the invariants get set up right */
1051: if ((ch = *new++) != *old)
1052: {
1053: if (line - lastline == 1 && start == 0)
1054: {
1.5 deraadt 1055: if (putchar('\n') == EOF)
1056: exit(1);
1.1 downsj 1057: }
1058: else
1059: {
1060: Move_to(start, line);
1061: }
1062: cursor_on_line = Yes;
1.5 deraadt 1063: if (putchar(ch) == EOF)
1064: exit(1);
1.1 downsj 1065: *old = ch;
1066: lastcol = 1;
1067: }
1068: old++;
1069:
1070: /*
1071: * main loop -- check each character. If the old and new aren't the
1072: * same, then update the display. When the distance from the
1073: * current cursor position to the new change is small enough,
1074: * the characters that belong there are written to move the
1075: * cursor over.
1076: *
1077: * Invariants:
1078: * lastcol is the column where the cursor currently is sitting
1079: * (always one beyond the end of the last mismatch).
1080: */
1081: do /* yes, a do...while */
1082: {
1083: if ((ch = *new++) != *old)
1084: {
1085: /* new character is different from old */
1086: /* make sure the cursor is on top of this character */
1087: diff = newcol - lastcol;
1088: if (diff > 0)
1089: {
1090: /* some motion is required--figure out which is shorter */
1091: if (diff < 6 && cursor_on_line)
1092: {
1093: /* overwrite old stuff--get it out of the old buffer */
1094: printf("%.*s", diff, ¤t[lastcol-start]);
1095: }
1096: else
1097: {
1098: /* use cursor addressing */
1099: Move_to(newcol, line);
1100: cursor_on_line = Yes;
1101: }
1102: /* remember where the cursor is */
1103: lastcol = newcol + 1;
1104: }
1105: else
1106: {
1107: /* already there, update position */
1108: lastcol++;
1109: }
1110:
1111: /* write what we need to */
1112: if (ch == '\0')
1113: {
1114: /* at the end--terminate with a clear-to-end-of-line */
1115: (void) clear_eol(strlen(old));
1116: }
1117: else
1118: {
1119: /* write the new character */
1.5 deraadt 1120: if (putchar(ch) == EOF)
1121: exit(1);
1.1 downsj 1122: }
1123: /* put the new character in the screen buffer */
1124: *old = ch;
1125: }
1126:
1127: /* update working column and screen buffer pointer */
1128: newcol++;
1129: old++;
1130:
1131: } while (ch != '\0');
1132:
1133: /* zero out the rest of the line buffer -- MUST BE DONE! */
1134: diff = display_width - newcol;
1135: if (diff > 0)
1136: {
1.2 downsj 1137: memset(old, 0, diff);
1.1 downsj 1138: }
1139:
1140: /* remember where the current line is */
1141: if (cursor_on_line)
1142: {
1143: lastline = line;
1144: }
1145: }
1146:
1147: /*
1148: * printable(str) - make the string pointed to by "str" into one that is
1149: * printable (i.e.: all ascii), by converting all non-printable
1150: * characters into '?'. Replacements are done in place and a pointer
1151: * to the original buffer is returned.
1152: */
1153:
1154: char *printable(str)
1155:
1156: char *str;
1157:
1158: {
1.8 ! mpech 1159: char *ptr;
! 1160: char ch;
1.1 downsj 1161:
1162: ptr = str;
1163: while ((ch = *ptr) != '\0')
1164: {
1165: if (!isprint(ch))
1166: {
1167: *ptr = '?';
1168: }
1169: ptr++;
1170: }
1171: return(str);
1172: }
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