Annotation of src/usr.bin/top/display.c, Revision 1.16
1.16 ! millert 1: /* $OpenBSD: display.c,v 1.15 2003/06/18 08:36:31 deraadt Exp $ */
1.1 downsj 2:
3: /*
4: * Top users/processes display for Unix
5: * Version 3
6: *
1.11 deraadt 7: * Copyright (c) 1984, 1989, William LeFebvre, Rice University
8: * Copyright (c) 1989, 1990, 1992, William LeFebvre, Northwestern University
1.1 downsj 9: *
1.11 deraadt 10: * Redistribution and use in source and binary forms, with or without
11: * modification, are permitted provided that the following conditions
12: * are met:
13: * 1. Redistributions of source code must retain the above copyright
14: * notice, this list of conditions and the following disclaimer.
15: * 2. Redistributions in binary form must reproduce the above copyright
16: * notice, this list of conditions and the following disclaimer in the
17: * documentation and/or other materials provided with the distribution.
18: *
19: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
20: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
21: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
22: * IN NO EVENT SHALL THE AUTHOR OR HIS EMPLOYER BE LIABLE FOR ANY DIRECT, INDIRECT,
23: * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
24: * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
28: * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
1.1 downsj 29: */
30:
31: /*
32: * This file contains the routines that display information on the screen.
33: * Each section of the screen has two routines: one for initially writing
34: * all constant and dynamic text, and one for only updating the text that
35: * changes. The prefix "i_" is used on all the "initial" routines and the
36: * prefix "u_" is used for all the "updating" routines.
37: *
38: * ASSUMPTIONS:
39: * None of the "i_" routines use any of the termcap capabilities.
40: * In this way, those routines can be safely used on terminals that
41: * have minimal (or nonexistant) terminal capabilities.
42: *
43: * The routines are called in this order: *_loadave, i_timeofday,
44: * *_procstates, *_cpustates, *_memory, *_message, *_header,
45: * *_process, u_endscreen.
46: */
47:
1.2 downsj 48: #include <sys/types.h>
49: #include <stdio.h>
1.1 downsj 50: #include <ctype.h>
1.2 downsj 51: #include <stdlib.h>
52: #include <string.h>
53: #include <term.h>
1.1 downsj 54: #include <time.h>
1.2 downsj 55: #include <unistd.h>
1.13 pvalchev 56: #include <stdarg.h>
1.1 downsj 57:
58: #include "screen.h" /* interface to screen package */
59: #include "layout.h" /* defines for screen position layout */
60: #include "display.h"
61: #include "top.h"
62: #include "top.local.h"
63: #include "boolean.h"
64: #include "machine.h" /* we should eliminate this!!! */
65: #include "utils.h"
66:
67: #ifdef DEBUG
1.14 deraadt 68: FILE *debug;
1.1 downsj 69: #endif
70:
1.14 deraadt 71: static pid_t lmpid = 0;
72: static int last_hi = 0; /* used in u_process and u_endscreen */
73: static int lastline = 0;
74: static int display_width = MAX_COLS;
75:
76: static char *cpustates_tag(void);
77: static int string_count(char **);
1.16 ! millert 78: static void summary_format(char *, size_t, int *, char **);
1.14 deraadt 79: static void line_update(char *, char *, int, int);
1.2 downsj 80:
1.1 downsj 81: #define lineindex(l) ((l)*display_width)
82:
83: /* things initialized by display_init and used thruout */
84:
85: /* buffer of proc information lines for display updating */
1.14 deraadt 86: char *screenbuf = NULL;
1.1 downsj 87:
1.14 deraadt 88: static char **procstate_names;
89: static char **cpustate_names;
90: static char **memory_names;
91:
92: static int num_procstates;
93: static int num_cpustates;
94:
95: static int *lprocstates;
96: static int *lcpustates;
97:
98: static int *cpustate_columns;
99: static int cpustate_total_length;
100:
101: static enum {
102: OFF, ON, ERASE
103: } header_status = ON;
1.1 downsj 104:
1.12 pvalchev 105: int
106: display_resize(void)
1.1 downsj 107: {
1.14 deraadt 108: int display_lines;
1.1 downsj 109:
1.14 deraadt 110: /* first, deallocate any previous buffer that may have been there */
111: if (screenbuf != NULL)
112: free(screenbuf);
113:
114: /* calculate the current dimensions */
115: /* if operating in "dumb" mode, we only need one line */
116: display_lines = smart_terminal ? screen_length - Header_lines : 1;
117:
118: /*
119: * we don't want more than MAX_COLS columns, since the
120: * machine-dependent modules make static allocations based on
121: * MAX_COLS and we don't want to run off the end of their buffers
122: */
123: display_width = screen_width;
124: if (display_width >= MAX_COLS)
125: display_width = MAX_COLS - 1;
126:
127: /* now, allocate space for the screen buffer */
128: screenbuf = (char *) malloc(display_lines * display_width);
129: if (screenbuf == (char *) NULL)
130: return (-1);
131:
132: /* return number of lines available */
133: /* for dumb terminals, pretend like we can show any amount */
134: return (smart_terminal ? display_lines : Largest);
1.1 downsj 135: }
136:
1.12 pvalchev 137: int
1.14 deraadt 138: display_init(struct statics * statics)
1.1 downsj 139: {
1.14 deraadt 140: int display_lines, *ip, i;
141: char **pp;
142:
143: /* call resize to do the dirty work */
144: display_lines = display_resize();
145:
146: /* only do the rest if we need to */
147: if (display_lines > -1) {
148: /* save pointers and allocate space for names */
149: procstate_names = statics->procstate_names;
150: num_procstates = string_count(procstate_names);
151: lprocstates = (int *) malloc(num_procstates * sizeof(int));
152:
153: cpustate_names = statics->cpustate_names;
154: num_cpustates = string_count(cpustate_names);
155: lcpustates = (int *) malloc(num_cpustates * sizeof(int));
156: cpustate_columns = (int *) malloc(num_cpustates * sizeof(int));
157:
158: memory_names = statics->memory_names;
159:
160: /* calculate starting columns where needed */
161: cpustate_total_length = 0;
162: pp = cpustate_names;
163: ip = cpustate_columns;
164: while (*pp != NULL) {
165: if ((i = strlen(*pp++)) > 0) {
166: *ip++ = cpustate_total_length;
167: cpustate_total_length += i + 8;
168: }
169: }
1.1 downsj 170: }
1.14 deraadt 171: /* return number of lines available */
172: return (display_lines);
1.1 downsj 173: }
174:
1.12 pvalchev 175: void
176: i_loadave(pid_t mpid, double *avenrun)
1.1 downsj 177: {
1.14 deraadt 178: int i;
179:
180: /* i_loadave also clears the screen, since it is first */
181: clear();
1.1 downsj 182:
1.14 deraadt 183: /* mpid == -1 implies this system doesn't have an _mpid */
184: if (mpid != -1)
185: printf("last pid: %5ld; ", (long) mpid);
1.1 downsj 186:
1.14 deraadt 187: printf("load averages");
188:
189: for (i = 0; i < 3; i++)
190: printf("%c %5.2f", i == 0 ? ':' : ',', avenrun[i]);
191:
192: lmpid = mpid;
1.1 downsj 193: }
194:
1.12 pvalchev 195: void
196: u_loadave(pid_t mpid, double *avenrun)
1.1 downsj 197: {
1.14 deraadt 198: int i;
1.1 downsj 199:
1.14 deraadt 200: if (mpid != -1) {
201: /* change screen only when value has really changed */
202: if (mpid != lmpid) {
203: Move_to(x_lastpid, y_lastpid);
204: printf("%5ld", (long) mpid);
205: lmpid = mpid;
206: }
207: /* i remembers x coordinate to move to */
208: i = x_loadave;
209: } else
210: i = x_loadave_nompid;
211:
212: /* move into position for load averages */
213: Move_to(i, y_loadave);
214:
215: /* display new load averages */
216: /* we should optimize this and only display changes */
217: for (i = 0; i < 3; i++)
218: printf("%s%5.2f", i == 0 ? "" : ", ", avenrun[i]);
1.1 downsj 219: }
220:
1.14 deraadt 221: /*
222: * Display the current time.
223: * "ctime" always returns a string that looks like this:
224: *
225: * Sun Sep 16 01:03:52 1973
226: * 012345678901234567890123
227: * 1 2
228: *
229: * We want indices 11 thru 18 (length 8).
230: */
231:
1.12 pvalchev 232: void
1.14 deraadt 233: i_timeofday(time_t * tod)
1.1 downsj 234: {
1.14 deraadt 235:
236: if (smart_terminal) {
237: Move_to(screen_width - 8, 0);
238: } else {
239: if (fputs(" ", stdout) == EOF)
240: exit(1);
241: }
1.1 downsj 242: #ifdef DEBUG
1.14 deraadt 243: {
244: char *foo;
245: foo = ctime(tod);
246: if (fputs(foo, stdout) == EOF)
247: exit(1);
248: }
1.1 downsj 249: #endif
1.14 deraadt 250: printf("%-8.8s\n", &(ctime(tod)[11]));
251: lastline = 1;
1.1 downsj 252: }
253:
1.14 deraadt 254: static int ltotal = 0;
255: static char procstates_buffer[128];
1.1 downsj 256:
257: /*
258: * *_procstates(total, brkdn, names) - print the process summary line
259: *
260: * Assumptions: cursor is at the beginning of the line on entry
261: * lastline is valid
262: */
1.12 pvalchev 263: void
264: i_procstates(int total, int *brkdn)
1.1 downsj 265: {
1.14 deraadt 266: int i;
1.1 downsj 267:
1.14 deraadt 268: /* write current number of processes and remember the value */
269: printf("%d processes:", total);
270: ltotal = total;
271:
272: /* put out enough spaces to get to column 15 */
273: i = digits(total);
274: while (i++ < 4) {
275: if (putchar(' ') == EOF)
276: exit(1);
277: }
278:
279: /* format and print the process state summary */
1.16 ! millert 280: summary_format(procstates_buffer, sizeof(procstates_buffer), brkdn,
! 281: procstate_names);
1.14 deraadt 282: if (fputs(procstates_buffer, stdout) == EOF)
1.5 deraadt 283: exit(1);
1.1 downsj 284:
1.14 deraadt 285: /* save the numbers for next time */
286: memcpy(lprocstates, brkdn, num_procstates * sizeof(int));
1.1 downsj 287: }
288:
1.12 pvalchev 289: void
290: u_procstates(int total, int *brkdn)
1.1 downsj 291: {
1.14 deraadt 292: static char new[128];
293: int i;
1.1 downsj 294:
1.14 deraadt 295: /* update number of processes only if it has changed */
296: if (ltotal != total) {
297: /* move and overwrite */
1.1 downsj 298: #if (x_procstate == 0)
1.14 deraadt 299: Move_to(x_procstate, y_procstate);
1.1 downsj 300: #else
1.14 deraadt 301: /* cursor is already there...no motion needed */
302: /* assert(lastline == 1); */
1.1 downsj 303: #endif
1.14 deraadt 304: printf("%d", total);
1.1 downsj 305:
1.14 deraadt 306: /* if number of digits differs, rewrite the label */
307: if (digits(total) != digits(ltotal)) {
308: if (fputs(" processes:", stdout) == EOF)
309: exit(1);
310: /* put out enough spaces to get to column 15 */
311: i = digits(total);
312: while (i++ < 4) {
313: if (putchar(' ') == EOF)
314: exit(1);
315: }
316: /* cursor may end up right where we want it!!! */
317: }
318: /* save new total */
319: ltotal = total;
320: }
321: /* see if any of the state numbers has changed */
322: if (memcmp(lprocstates, brkdn, num_procstates * sizeof(int)) != 0) {
323: /* format and update the line */
1.16 ! millert 324: summary_format(new, sizeof(new), brkdn, procstate_names);
1.14 deraadt 325: line_update(procstates_buffer, new, x_brkdn, y_brkdn);
326: memcpy(lprocstates, brkdn, num_procstates * sizeof(int));
1.1 downsj 327: }
328: }
329:
330: /*
331: * *_cpustates(states, names) - print the cpu state percentages
332: *
333: * Assumptions: cursor is on the PREVIOUS line
334: */
335:
1.14 deraadt 336: static int cpustates_column;
1.1 downsj 337:
338: /* cpustates_tag() calculates the correct tag to use to label the line */
339:
1.12 pvalchev 340: static char *
341: cpustates_tag(void)
1.1 downsj 342: {
1.14 deraadt 343: static char *short_tag = "CPU: ";
344: static char *long_tag = "CPU states: ";
345: char *use;
346:
347: /*
348: * if length + strlen(long_tag) >= screen_width, then we have to use
349: * the shorter tag (we subtract 2 to account for ": ")
350: */
351: if (cpustate_total_length + (int) strlen(long_tag) - 2 >= screen_width)
352: use = short_tag;
353: else
354: use = long_tag;
1.1 downsj 355:
1.14 deraadt 356: /* set cpustates_column accordingly then return result */
357: cpustates_column = strlen(use);
358: return (use);
1.1 downsj 359: }
360:
1.12 pvalchev 361: void
362: i_cpustates(int *states)
1.1 downsj 363: {
1.14 deraadt 364: int i = 0, value;
365: char **names = cpustate_names, *thisname;
366:
367: /* print tag and bump lastline */
368: printf("\n%s", cpustates_tag());
369: lastline++;
1.1 downsj 370:
1.14 deraadt 371: /* now walk thru the names and print the line */
372: while ((thisname = *names++) != NULL) {
373: if (*thisname != '\0') {
374: /* retrieve the value and remember it */
375: value = *states++;
376:
377: /* if percentage is >= 1000, print it as 100% */
378: printf((value >= 1000 ? "%s%4.0f%% %s" : "%s%4.1f%% %s"),
379: i++ == 0 ? "" : ", ",
380: ((float) value) / 10.,
381: thisname);
382: }
1.1 downsj 383: }
384:
1.14 deraadt 385: /* copy over values into "last" array */
386: memcpy(lcpustates, states, num_cpustates * sizeof(int));
1.1 downsj 387: }
388:
1.12 pvalchev 389: void
390: u_cpustates(int *states)
1.1 downsj 391: {
1.14 deraadt 392: char **names = cpustate_names, *thisname;
393: int value, *lp, *colp;
394:
395: Move_to(cpustates_column, y_cpustates);
396: lastline = y_cpustates;
397: lp = lcpustates;
398: colp = cpustate_columns;
399:
400: /* we could be much more optimal about this */
401: while ((thisname = *names++) != NULL) {
402: if (*thisname != '\0') {
403: /* did the value change since last time? */
404: if (*lp != *states) {
405: /* yes, move and change */
406: Move_to(cpustates_column + *colp, y_cpustates);
407: lastline = y_cpustates;
408:
409: /* retrieve value and remember it */
410: value = *states;
411:
412: /* if percentage is >= 1000, print it as 100% */
413: printf((value >= 1000 ? "%4.0f" : "%4.1f"),
414: ((double) value) / 10.);
415:
416: /* remember it for next time */
417: *lp = *states;
418: }
419: }
420: /* increment and move on */
421: lp++;
422: states++;
423: colp++;
424: }
1.1 downsj 425: }
426:
1.12 pvalchev 427: void
428: z_cpustates(void)
1.1 downsj 429: {
1.14 deraadt 430: char **names = cpustate_names, *thisname;
431: int i = 0, *lp;
432:
433: /* show tag and bump lastline */
434: printf("\n%s", cpustates_tag());
435: lastline++;
436:
437: while ((thisname = *names++) != NULL) {
438: if (*thisname != '\0')
439: printf("%s %% %s", i++ == 0 ? "" : ", ", thisname);
1.1 downsj 440: }
441:
1.14 deraadt 442: /* fill the "last" array with all -1s, to insure correct updating */
443: lp = lcpustates;
444: i = num_cpustates;
445: while (--i >= 0)
446: *lp++ = -1;
1.1 downsj 447: }
448:
1.14 deraadt 449: static char memory_buffer[MAX_COLS];
450:
1.1 downsj 451: /*
452: * *_memory(stats) - print "Memory: " followed by the memory summary string
453: *
454: * Assumptions: cursor is on "lastline"
455: * for i_memory ONLY: cursor is on the previous line
456: */
1.12 pvalchev 457: void
458: i_memory(int *stats)
1.1 downsj 459: {
1.14 deraadt 460: if (fputs("\nMemory: ", stdout) == EOF)
461: exit(1);
462: lastline++;
463:
464: /* format and print the memory summary */
1.16 ! millert 465: summary_format(memory_buffer, sizeof(memory_buffer), stats,
! 466: memory_names);
1.14 deraadt 467: if (fputs(memory_buffer, stdout) == EOF)
468: exit(1);
1.1 downsj 469: }
470:
1.12 pvalchev 471: void
472: u_memory(int *stats)
1.1 downsj 473: {
1.14 deraadt 474: static char new[MAX_COLS];
1.1 downsj 475:
1.14 deraadt 476: /* format the new line */
1.16 ! millert 477: summary_format(new, sizeof(new), stats, memory_names);
1.14 deraadt 478: line_update(memory_buffer, new, x_mem, y_mem);
1.1 downsj 479: }
480:
481: /*
482: * *_message() - print the next pending message line, or erase the one
483: * that is there.
484: *
485: * Note that u_message is (currently) the same as i_message.
486: *
487: * Assumptions: lastline is consistent
488: */
489:
490: /*
491: * i_message is funny because it gets its message asynchronously (with
492: * respect to screen updates).
493: */
494:
1.14 deraadt 495: static char next_msg[MAX_COLS + 5];
496: static int msglen = 0;
497: /*
498: * Invariant: msglen is always the length of the message currently displayed
499: * on the screen (even when next_msg doesn't contain that message).
500: */
1.1 downsj 501:
1.12 pvalchev 502: void
503: i_message(void)
1.1 downsj 504: {
1.14 deraadt 505: while (lastline < y_message) {
506: if (fputc('\n', stdout) == EOF)
507: exit(1);
508: lastline++;
509: }
510: if (next_msg[0] != '\0') {
511: standout(next_msg);
512: msglen = strlen(next_msg);
513: next_msg[0] = '\0';
514: } else if (msglen > 0) {
515: (void) clear_eol(msglen);
516: msglen = 0;
517: }
1.1 downsj 518: }
519:
1.12 pvalchev 520: void
521: u_message(void)
1.1 downsj 522: {
1.14 deraadt 523: i_message();
1.1 downsj 524: }
525:
1.14 deraadt 526: static int header_length;
1.1 downsj 527:
528: /*
529: * *_header(text) - print the header for the process area
530: *
531: * Assumptions: cursor is on the previous line and lastline is consistent
532: */
533:
1.12 pvalchev 534: void
535: i_header(char *text)
1.1 downsj 536: {
1.14 deraadt 537: header_length = strlen(text);
538: if (header_status == ON) {
539: if (putchar('\n') == EOF)
540: exit(1);
541: if (fputs(text, stdout) == EOF)
542: exit(1);
543: lastline++;
544: } else if (header_status == ERASE) {
545: header_status = OFF;
546: }
1.1 downsj 547: }
548:
1.14 deraadt 549: /* ARGSUSED */
1.12 pvalchev 550: void
551: u_header(char *text)
1.1 downsj 552: {
1.14 deraadt 553: if (header_status == ERASE) {
554: if (putchar('\n') == EOF)
555: exit(1);
556: lastline++;
557: clear_eol(header_length);
558: header_status = OFF;
559: }
1.1 downsj 560: }
561:
562: /*
563: * *_process(line, thisline) - print one process line
564: *
565: * Assumptions: lastline is consistent
566: */
567:
1.12 pvalchev 568: void
569: i_process(int line, char *thisline)
1.1 downsj 570: {
1.16 ! millert 571: char *base;
! 572: size_t len;
1.1 downsj 573:
1.14 deraadt 574: /* make sure we are on the correct line */
575: while (lastline < y_procs + line) {
576: if (putchar('\n') == EOF)
577: exit(1);
578: lastline++;
579: }
1.1 downsj 580:
1.14 deraadt 581: /* truncate the line to conform to our current screen width */
582: thisline[display_width] = '\0';
1.1 downsj 583:
1.14 deraadt 584: /* write the line out */
585: if (fputs(thisline, stdout) == EOF)
586: exit(1);
1.1 downsj 587:
1.14 deraadt 588: /* copy it in to our buffer */
589: base = smart_terminal ? screenbuf + lineindex(line) : screenbuf;
1.16 ! millert 590: len = strlcpy(base, thisline, display_width);
! 591: if (len < (size_t)display_width) {
! 592: /* zero fill the rest of it */
! 593: memset(base + len, 0, display_width - len);
! 594: }
1.1 downsj 595: }
596:
1.12 pvalchev 597: void
598: u_process(int linenum, char *linebuf)
1.1 downsj 599: {
1.14 deraadt 600: int screen_line = linenum + Header_lines;
1.16 ! millert 601: char *bufferline;
! 602: size_t len;
1.14 deraadt 603:
604: /* remember a pointer to the current line in the screen buffer */
605: bufferline = &screenbuf[lineindex(linenum)];
606:
607: /* truncate the line to conform to our current screen width */
608: linebuf[display_width] = '\0';
609:
610: /* is line higher than we went on the last display? */
611: if (linenum >= last_hi) {
612: /* yes, just ignore screenbuf and write it out directly */
613: /* get positioned on the correct line */
614: if (screen_line - lastline == 1) {
615: if (putchar('\n') == EOF)
616: exit(1);
617: lastline++;
618: } else {
619: Move_to(0, screen_line);
620: lastline = screen_line;
621: }
1.1 downsj 622:
1.14 deraadt 623: /* now write the line */
624: if (fputs(linebuf, stdout) == EOF)
625: exit(1);
1.1 downsj 626:
1.14 deraadt 627: /* copy it in to the buffer */
1.16 ! millert 628: len = strlcpy(bufferline, linebuf, display_width);
! 629: if (len < (size_t)display_width) {
! 630: /* zero fill the rest of it */
! 631: memset(bufferline + len, 0, display_width - len);
! 632: }
1.14 deraadt 633: } else {
634: line_update(bufferline, linebuf, 0, linenum + Header_lines);
635: }
1.1 downsj 636: }
637:
1.12 pvalchev 638: void
639: u_endscreen(int hi)
1.1 downsj 640: {
1.14 deraadt 641: int screen_line = hi + Header_lines, i;
1.1 downsj 642:
1.14 deraadt 643: if (smart_terminal) {
644: if (hi < last_hi) {
645: /* need to blank the remainder of the screen */
646: /*
647: * but only if there is any screen left below this
648: * line
649: */
650: if (lastline + 1 < screen_length) {
651: /*
652: * efficiently move to the end of currently
653: * displayed info
654: */
655: if (screen_line - lastline < 5) {
656: while (lastline < screen_line) {
657: if (putchar('\n') == EOF)
658: exit(1);
659: lastline++;
660: }
661: } else {
662: Move_to(0, screen_line);
663: lastline = screen_line;
664: }
665:
666: if (clear_to_end) {
667: /* we can do this the easy way */
668: putcap(clear_to_end);
669: } else {
670: /* use clear_eol on each line */
671: i = hi;
672: while ((void) clear_eol(strlen(&screenbuf[lineindex(i++)])), i < last_hi) {
673: if (putchar('\n') == EOF)
674: exit(1);
675: }
676: }
677: }
1.1 downsj 678: }
1.14 deraadt 679: last_hi = hi;
1.1 downsj 680:
1.14 deraadt 681: /* move the cursor to a pleasant place */
682: Move_to(x_idlecursor, y_idlecursor);
683: lastline = y_idlecursor;
684: } else {
685: /*
686: * separate this display from the next with some vertical
687: * room
688: */
689: if (fputs("\n\n", stdout) == EOF)
690: exit(1);
1.1 downsj 691: }
692: }
693:
1.12 pvalchev 694: void
695: display_header(int t)
1.1 downsj 696: {
1.14 deraadt 697: if (t) {
698: header_status = ON;
699: } else if (header_status == ON) {
700: header_status = ERASE;
701: }
1.1 downsj 702: }
703:
1.12 pvalchev 704: void
1.14 deraadt 705: new_message(int type, const char *msgfmt,...)
706: {
707: va_list ap;
708: int i;
709:
710: va_start(ap, msgfmt);
711: /* first, format the message */
712: vsnprintf(next_msg, sizeof(next_msg), msgfmt, ap);
713: va_end(ap);
714:
715: if (msglen > 0) {
716: /* message there already -- can we clear it? */
717: if (!overstrike) {
718: /* yes -- write it and clear to end */
719: i = strlen(next_msg);
720: if ((type & MT_delayed) == 0) {
721: if (type & MT_standout)
722: standout(next_msg);
723: else {
724: if (fputs(next_msg, stdout) == EOF)
725: exit(1);
726: }
727: (void) clear_eol(msglen - i);
728: msglen = i;
729: next_msg[0] = '\0';
730: }
731: }
732: } else {
733: if ((type & MT_delayed) == 0) {
734: if (type & MT_standout)
735: standout(next_msg);
736: else {
737: if (fputs(next_msg, stdout) == EOF)
738: exit(1);
739: }
740: msglen = strlen(next_msg);
741: next_msg[0] = '\0';
1.5 deraadt 742: }
1.1 downsj 743: }
744: }
745:
1.12 pvalchev 746: void
747: clear_message(void)
1.1 downsj 748: {
1.14 deraadt 749: if (clear_eol(msglen) == 1) {
750: if (putchar('\r') == EOF)
751: exit(1);
752: }
1.1 downsj 753: }
754:
1.12 pvalchev 755: int
756: readline(char *buffer, int size, int numeric)
1.1 downsj 757: {
1.14 deraadt 758: char *ptr = buffer, ch, cnt = 0, maxcnt = 0;
759:
760: /* allow room for null terminator */
761: size -= 1;
762:
763: /* read loop */
764: while ((fflush(stdout), read(0, ptr, 1) > 0)) {
765: /* newline means we are done */
766: if ((ch = *ptr) == '\n')
767: break;
768:
769: /* handle special editing characters */
770: if (ch == ch_kill) {
771: /* kill line -- account for overstriking */
772: if (overstrike)
773: msglen += maxcnt;
774:
775: /* return null string */
776: *buffer = '\0';
777: if (putchar('\r') == EOF)
778: exit(1);
779: return (-1);
780: } else if (ch == ch_erase) {
781: /* erase previous character */
782: if (cnt <= 0) {
783: /* none to erase! */
784: if (putchar('\7') == EOF)
785: exit(1);
786: } else {
787: if (fputs("\b \b", stdout) == EOF)
788: exit(1);
789: ptr--;
790: cnt--;
791: }
792: }
793: /* check for character validity and buffer overflow */
794: else if (cnt == size || (numeric && !isdigit(ch)) ||
795: !isprint(ch)) {
796: /* not legal */
797: if (putchar('\7') == EOF)
798: exit(1);
799: } else {
800: /* echo it and store it in the buffer */
801: if (putchar(ch) == EOF)
802: exit(1);
803: ptr++;
804: cnt++;
805: if (cnt > maxcnt)
806: maxcnt = cnt;
807: }
1.1 downsj 808: }
809:
1.14 deraadt 810: /* all done -- null terminate the string */
811: *ptr = '\0';
812:
813: /* account for the extra characters in the message area */
814: /* (if terminal overstrikes, remember the furthest they went) */
815: msglen += overstrike ? maxcnt : cnt;
816:
817: /* return either inputted number or string length */
818: if (putchar('\r') == EOF)
1.5 deraadt 819: exit(1);
1.14 deraadt 820: return (cnt == 0 ? -1 : numeric ? atoi(buffer) : cnt);
1.1 downsj 821: }
822:
823: /* internal support routines */
1.12 pvalchev 824: static int
825: string_count(char **pp)
1.1 downsj 826: {
1.14 deraadt 827: int cnt;
1.1 downsj 828:
1.14 deraadt 829: cnt = 0;
830: while (*pp++ != NULL)
831: cnt++;
832: return (cnt);
1.1 downsj 833: }
834:
1.16 ! millert 835: #define COPYLEFT(to, from) \
! 836: do { \
! 837: len = strlcpy((to), (from), left); \
! 838: if (len >= left) \
! 839: return; \
! 840: p += len; \
! 841: left -= len; \
! 842: } while (0)
! 843:
1.12 pvalchev 844: static void
1.16 ! millert 845: summary_format(char *buf, size_t left, int *numbers, char **names)
1.1 downsj 846: {
1.14 deraadt 847: char *p, *thisname;
1.16 ! millert 848: size_t len;
1.14 deraadt 849: int num;
1.1 downsj 850:
1.14 deraadt 851: /* format each number followed by its string */
1.16 ! millert 852: p = buf;
1.14 deraadt 853: while ((thisname = *names++) != NULL) {
854: /* get the number to format */
855: num = *numbers++;
856:
857: if (num >= 0) {
858: /* is this number in kilobytes? */
859: if (thisname[0] == 'K') {
860: /* yes: format it as a memory value */
1.16 ! millert 861: COPYLEFT(p, format_k(num));
1.14 deraadt 862:
863: /*
864: * skip over the K, since it was included by
865: * format_k
866: */
1.16 ! millert 867: COPYLEFT(p, thisname + 1);
1.14 deraadt 868: } else if (num > 0) {
1.16 ! millert 869: len = snprintf(p, left, "%d%s", num, thisname);
! 870: if (len == (size_t)-1 || len >= left)
! 871: return;
! 872: p += len;
! 873: left -= len;
1.14 deraadt 874: }
1.16 ! millert 875: } else {
! 876: /*
! 877: * Ignore negative numbers, but display corresponding
! 878: * string.
! 879: */
! 880: COPYLEFT(p, thisname);
1.14 deraadt 881: }
1.1 downsj 882: }
883:
1.14 deraadt 884: /* if the last two characters in the string are ", ", delete them */
885: p -= 2;
1.16 ! millert 886: if (p >= buf && p[0] == ',' && p[1] == ' ')
1.14 deraadt 887: *p = '\0';
1.1 downsj 888: }
889:
1.12 pvalchev 890: static void
891: line_update(char *old, char *new, int start, int line)
1.1 downsj 892: {
1.14 deraadt 893: int ch, diff, newcol = start + 1, lastcol = start;
894: char cursor_on_line = No, *current;
1.1 downsj 895:
1.14 deraadt 896: /* compare the two strings and only rewrite what has changed */
897: current = old;
1.1 downsj 898: #ifdef DEBUG
1.14 deraadt 899: fprintf(debug, "line_update, starting at %d\n", start);
900: fputs(old, debug);
901: fputc('\n', debug);
902: fputs(new, debug);
903: fputs("\n-\n", debug);
1.1 downsj 904: #endif
905:
1.14 deraadt 906: /* start things off on the right foot */
907: /* this is to make sure the invariants get set up right */
908: if ((ch = *new++) != *old) {
909: if (line - lastline == 1 && start == 0) {
910: if (putchar('\n') == EOF)
911: exit(1);
912: } else
913: Move_to(start, line);
914:
915: cursor_on_line = Yes;
916: if (putchar(ch) == EOF)
917: exit(1);
918: *old = ch;
919: lastcol = 1;
1.1 downsj 920: }
921: old++;
922:
1.14 deraadt 923: /*
924: * main loop -- check each character. If the old and new aren't the
925: * same, then update the display. When the distance from the
926: * current cursor position to the new change is small enough,
927: * the characters that belong there are written to move the
928: * cursor over.
929: *
930: * Invariants:
931: * lastcol is the column where the cursor currently is sitting
932: * (always one beyond the end of the last mismatch).
933: */
934: do {
935: if ((ch = *new++) != *old) {
936: /* new character is different from old */
937: /* make sure the cursor is on top of this character */
938: diff = newcol - lastcol;
939: if (diff > 0) {
940: /*
941: * some motion is required--figure out which
942: * is shorter
943: */
944: if (diff < 6 && cursor_on_line) {
945: /*
946: * overwrite old stuff--get it out of
947: * the old buffer
948: */
949: printf("%.*s", diff, ¤t[lastcol - start]);
950: } else {
951: /* use cursor addressing */
952: Move_to(newcol, line);
953: cursor_on_line = Yes;
954: }
955: /* remember where the cursor is */
956: lastcol = newcol + 1;
957: } else {
958: /* already there, update position */
959: lastcol++;
960: }
961:
962: /* write what we need to */
963: if (ch == '\0') {
964: /*
965: * at the end--terminate with a
966: * clear-to-end-of-line
967: */
968: (void) clear_eol(strlen(old));
969: } else {
970: /* write the new character */
971: if (putchar(ch) == EOF)
972: exit(1);
973: }
974: /* put the new character in the screen buffer */
975: *old = ch;
976: }
977: /* update working column and screen buffer pointer */
978: newcol++;
979: old++;
980: } while (ch != '\0');
981:
982: /* zero out the rest of the line buffer -- MUST BE DONE! */
983: diff = display_width - newcol;
984: if (diff > 0)
985: memset(old, 0, diff);
986:
987: /* remember where the current line is */
988: if (cursor_on_line)
989: lastline = line;
1.1 downsj 990: }
991:
992: /*
993: * printable(str) - make the string pointed to by "str" into one that is
994: * printable (i.e.: all ascii), by converting all non-printable
995: * characters into '?'. Replacements are done in place and a pointer
996: * to the original buffer is returned.
997: */
1.12 pvalchev 998: char *
999: printable(char *str)
1.1 downsj 1000: {
1.14 deraadt 1001: char *ptr, ch;
1.1 downsj 1002:
1.14 deraadt 1003: ptr = str;
1004: while ((ch = *ptr) != '\0') {
1005: if (!isprint(ch))
1006: *ptr = '?';
1007: ptr++;
1.1 downsj 1008: }
1.14 deraadt 1009: return (str);
1.1 downsj 1010: }
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