Annotation of src/usr.bin/top/display.c, Revision 1.38
1.38 ! otto 1: /* $OpenBSD: display.c,v 1.37 2010/02/05 10:21:10 otto 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
1.18 otto 41: * have minimal (or nonexistent) terminal capabilities.
1.1 downsj 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>
1.20 millert 49: #include <sys/sched.h>
1.25 otto 50: #include <curses.h>
51: #include <errno.h>
1.2 downsj 52: #include <stdio.h>
1.1 downsj 53: #include <ctype.h>
1.20 millert 54: #include <err.h>
1.25 otto 55: #include <signal.h>
1.2 downsj 56: #include <stdlib.h>
57: #include <string.h>
58: #include <unistd.h>
1.1 downsj 59:
60: #include "screen.h" /* interface to screen package */
61: #include "layout.h" /* defines for screen position layout */
62: #include "display.h"
63: #include "top.h"
64: #include "boolean.h"
65: #include "machine.h" /* we should eliminate this!!! */
66: #include "utils.h"
67:
68: #ifdef DEBUG
1.14 deraadt 69: FILE *debug;
1.1 downsj 70: #endif
71:
1.14 deraadt 72: static int display_width = MAX_COLS;
73:
1.20 millert 74: static char *cpustates_tag(int);
1.14 deraadt 75: static int string_count(char **);
1.16 millert 76: static void summary_format(char *, size_t, int *, char **);
1.32 otto 77: static int readlinedumb(char *, int);
1.2 downsj 78:
1.1 downsj 79: #define lineindex(l) ((l)*display_width)
80:
1.18 otto 81: /* things initialized by display_init and used throughout */
1.1 downsj 82:
83: /* buffer of proc information lines for display updating */
1.14 deraadt 84: char *screenbuf = NULL;
1.1 downsj 85:
1.14 deraadt 86: static char **procstate_names;
87: static char **cpustate_names;
88: static char **memory_names;
89:
90: static int num_cpustates;
91:
92: static int *cpustate_columns;
93: static int cpustate_total_length;
94:
1.20 millert 95: /* display ips */
96: int y_mem;
97: int y_message;
98: int y_header;
99: int y_idlecursor;
100: int y_procs;
101: extern int ncpu;
1.34 tedu 102: extern int combine_cpus;
1.20 millert 103:
1.33 otto 104: int header_status = Yes;
1.1 downsj 105:
1.25 otto 106: static int
107: empty(void)
108: {
109: return OK;
110: }
111:
112: static int
113: myfputs(const char *s)
114: {
115: return fputs(s, stdout);
116: }
117:
118: static int (*addstrp)(const char *);
119: static int (*printwp)(const char *, ...);
120: static int (*standoutp)(void);
121: static int (*standendp)(void);
122:
1.12 pvalchev 123: int
124: display_resize(void)
1.1 downsj 125: {
1.14 deraadt 126: int display_lines;
1.34 tedu 127: int cpu_lines = (combine_cpus ? 1 : ncpu);
128:
129: y_mem = 2 + cpu_lines;
130: y_header = 4 + cpu_lines;
131: y_procs = 5 + cpu_lines;
1.1 downsj 132:
1.14 deraadt 133: /* calculate the current dimensions */
134: /* if operating in "dumb" mode, we only need one line */
1.37 otto 135: display_lines = smart_terminal ? screen_length - y_procs : 1;
1.14 deraadt 136:
1.34 tedu 137: y_idlecursor = y_message = 3 + (combine_cpus ? 1 : ncpu);
1.30 otto 138: if (screen_length <= y_message)
139: y_idlecursor = y_message = screen_length - 1;
140:
1.14 deraadt 141: /*
142: * we don't want more than MAX_COLS columns, since the
143: * machine-dependent modules make static allocations based on
144: * MAX_COLS and we don't want to run off the end of their buffers
145: */
146: display_width = screen_width;
147: if (display_width >= MAX_COLS)
148: display_width = MAX_COLS - 1;
149:
150: /* return number of lines available */
151: /* for dumb terminals, pretend like we can show any amount */
152: return (smart_terminal ? display_lines : Largest);
1.1 downsj 153: }
154:
1.12 pvalchev 155: int
1.14 deraadt 156: display_init(struct statics * statics)
1.1 downsj 157: {
1.34 tedu 158: int display_lines, *ip, i;
1.14 deraadt 159: char **pp;
160:
1.25 otto 161: if (smart_terminal) {
162: addstrp = addstr;
163: printwp = (int(*)(const char *, ...))printw;
164: standoutp = standout;
165: standendp = standend;
166: } else {
167: addstrp = myfputs;
168: printwp = printf;
169: standoutp = empty;
170: standendp = empty;
171: }
172:
1.14 deraadt 173: /* call resize to do the dirty work */
174: display_lines = display_resize();
175:
176: /* only do the rest if we need to */
1.30 otto 177: /* save pointers and allocate space for names */
178: procstate_names = statics->procstate_names;
179:
180: cpustate_names = statics->cpustate_names;
181: num_cpustates = string_count(cpustate_names);
182:
183: cpustate_columns = calloc(num_cpustates, sizeof(int));
184: if (cpustate_columns == NULL)
185: err(1, NULL);
186:
187: memory_names = statics->memory_names;
188:
189: /* calculate starting columns where needed */
190: cpustate_total_length = 0;
191: pp = cpustate_names;
192: ip = cpustate_columns;
193: while (*pp != NULL) {
194: if ((i = strlen(*pp++)) > 0) {
195: *ip++ = cpustate_total_length;
196: cpustate_total_length += i + 8;
1.20 millert 197: }
1.30 otto 198: }
1.14 deraadt 199:
1.30 otto 200: if (display_lines < 0)
201: display_lines = 0;
1.14 deraadt 202:
203: /* return number of lines available */
204: return (display_lines);
1.1 downsj 205: }
206:
1.12 pvalchev 207: void
208: i_loadave(pid_t mpid, double *avenrun)
1.1 downsj 209: {
1.30 otto 210: if (screen_length > 1 || !smart_terminal) {
211: int i;
1.14 deraadt 212:
1.30 otto 213: move(0, 0);
214: clrtoeol();
1.1 downsj 215:
1.30 otto 216: addstrp("load averages");
217: /* mpid == -1 implies this system doesn't have an _mpid */
218: if (mpid != -1)
219: printwp("last pid: %5ld; ", (long) mpid);
1.1 downsj 220:
1.30 otto 221: for (i = 0; i < 3; i++)
222: printwp("%c %5.2f", i == 0 ? ':' : ',', avenrun[i]);
223: }
1.1 downsj 224: }
225:
1.14 deraadt 226: /*
227: * Display the current time.
228: * "ctime" always returns a string that looks like this:
229: *
230: * Sun Sep 16 01:03:52 1973
231: * 012345678901234567890123
232: * 1 2
233: *
234: * We want indices 11 thru 18 (length 8).
235: */
236:
1.12 pvalchev 237: void
1.14 deraadt 238: i_timeofday(time_t * tod)
1.1 downsj 239: {
1.30 otto 240: if (screen_length > 1 || !smart_terminal) {
241: if (smart_terminal) {
242: move(0, screen_width - 8);
243: } else {
244: if (fputs(" ", stdout) == EOF)
245: exit(1);
246: }
1.1 downsj 247: #ifdef DEBUG
1.30 otto 248: {
249: char *foo;
250: foo = ctime(tod);
251: addstrp(foo);
252: }
253: #endif
254: printwp("%-8.8s", &(ctime(tod)[11]));
255: putn();
1.14 deraadt 256: }
1.1 downsj 257: }
258:
259: /*
260: * *_procstates(total, brkdn, names) - print the process summary line
261: *
262: * Assumptions: cursor is at the beginning of the line on entry
263: */
1.12 pvalchev 264: void
265: i_procstates(int total, int *brkdn)
1.1 downsj 266: {
1.30 otto 267: if (screen_length > 2 || !smart_terminal) {
268: int i;
269: char procstates_buffer[MAX_COLS];
270:
271: move(1, 0);
272: clrtoeol();
273: /* write current number of processes and remember the value */
274: printwp("%d processes:", total);
1.1 downsj 275:
1.30 otto 276: if (smart_terminal)
277: move(1, 15);
278: else {
279: /* put out enough spaces to get to column 15 */
280: i = digits(total);
281: while (i++ < 4) {
282: if (putchar(' ') == EOF)
283: exit(1);
284: }
1.25 otto 285: }
1.14 deraadt 286:
1.30 otto 287: /* format and print the process state summary */
288: summary_format(procstates_buffer, sizeof(procstates_buffer), brkdn,
289: procstate_names);
1.1 downsj 290:
1.30 otto 291: addstrp(procstates_buffer);
292: putn();
293: }
1.1 downsj 294: }
295:
296: /*
297: * *_cpustates(states, names) - print the cpu state percentages
298: *
299: * Assumptions: cursor is on the PREVIOUS line
300: */
301:
302: /* cpustates_tag() calculates the correct tag to use to label the line */
303:
1.12 pvalchev 304: static char *
1.20 millert 305: cpustates_tag(int cpu)
1.1 downsj 306: {
1.30 otto 307: if (screen_length > 3 || !smart_terminal) {
308: static char *tag;
309: static int cpulen, old_width;
310: int i;
311:
312: if (cpulen == 0 && ncpu > 1) {
313: /* compute length of the cpu string */
314: for (i = ncpu; i > 0; cpulen++, i /= 10)
315: continue;
316: }
1.20 millert 317:
1.30 otto 318: if (old_width == screen_width) {
319: if (ncpu > 1) {
320: /* just store the cpu number in the tag */
321: i = tag[3 + cpulen];
322: snprintf(tag + 3, cpulen + 1, "%.*d", cpulen, cpu);
323: tag[3 + cpulen] = i;
324: }
325: } else {
326: /*
327: * use a long tag if it will fit, otherwise use short one.
328: */
329: free(tag);
330: if (cpustate_total_length + 10 + cpulen >= screen_width)
331: i = asprintf(&tag, "CPU%.*d: ", cpulen, cpu);
332: else
333: i = asprintf(&tag, "CPU%.*d states: ", cpulen, cpu);
334: if (i == -1)
335: tag = NULL;
336: else
337: old_width = screen_width;
1.20 millert 338: }
1.30 otto 339: return (tag);
340: } else
1.34 tedu 341: return ("\0");
1.1 downsj 342: }
343:
1.12 pvalchev 344: void
1.20 millert 345: i_cpustates(int64_t *ostates)
1.1 downsj 346: {
1.34 tedu 347: int i, first, cpu;
348: double value;
1.20 millert 349: int64_t *states;
1.34 tedu 350: char **names, *thisname;
351:
352: if (combine_cpus) {
353: static double *values;
354: if (!values) {
355: values = calloc(num_cpustates, sizeof(*values));
356: if (!values)
357: err(1, NULL);
358: }
359: memset(values, 0, num_cpustates * sizeof(*values));
360: for (cpu = 0; cpu < ncpu; cpu++) {
361: names = cpustate_names;
362: states = ostates + (CPUSTATES * cpu);
363: i = 0;
364: while ((thisname = *names++) != NULL) {
365: if (*thisname != '\0') {
366: /* retrieve the value and remember it */
367: values[i++] += *states++;
368: }
369: }
370: }
371: if (screen_length > 2 || !smart_terminal) {
372: names = cpustate_names;
373: i = 0;
374: first = 0;
375: move(2, 0);
376: clrtoeol();
377: addstrp("All CPUs: ");
1.14 deraadt 378:
1.34 tedu 379: while ((thisname = *names++) != NULL) {
380: if (*thisname != '\0') {
381: value = values[i++] / ncpu;
382: /* if percentage is >= 1000, print it as 100% */
383: printwp((value >= 1000 ? "%s%4.0f%% %s" :
384: "%s%4.1f%% %s"), first++ == 0 ? "" : ", ",
385: value / 10., thisname);
386: }
387: }
388: putn();
389: }
390: return;
391: }
1.20 millert 392: for (cpu = 0; cpu < ncpu; cpu++) {
393: /* now walk thru the names and print the line */
394: names = cpustate_names;
1.34 tedu 395: first = 0;
1.20 millert 396: states = ostates + (CPUSTATES * cpu);
1.30 otto 397:
398: if (screen_length > 2 + cpu || !smart_terminal) {
399: move(2 + cpu, 0);
400: clrtoeol();
401: addstrp(cpustates_tag(cpu));
402:
403: while ((thisname = *names++) != NULL) {
404: if (*thisname != '\0') {
405: /* retrieve the value and remember it */
406: value = *states++;
407:
408: /* if percentage is >= 1000, print it as 100% */
409: printwp((value >= 1000 ? "%s%4.0f%% %s" :
1.34 tedu 410: "%s%4.1f%% %s"), first++ == 0 ? "" : ", ",
411: value / 10., thisname);
1.30 otto 412: }
1.20 millert 413: }
1.30 otto 414: putn();
1.14 deraadt 415: }
1.1 downsj 416: }
417: }
418:
419: /*
420: * *_memory(stats) - print "Memory: " followed by the memory summary string
421: */
1.12 pvalchev 422: void
423: i_memory(int *stats)
1.1 downsj 424: {
1.30 otto 425: if (screen_length > y_mem || !smart_terminal) {
426: char memory_buffer[MAX_COLS];
427:
428: move(y_mem, 0);
429: clrtoeol();
430: addstrp("Memory: ");
1.25 otto 431:
1.30 otto 432: /* format and print the memory summary */
433: summary_format(memory_buffer, sizeof(memory_buffer), stats,
434: memory_names);
435: addstrp(memory_buffer);
436: putn();
437: }
1.1 downsj 438: }
439:
440: /*
441: * *_message() - print the next pending message line, or erase the one
442: * that is there.
443: */
444:
445: /*
446: * i_message is funny because it gets its message asynchronously (with
447: * respect to screen updates).
448: */
449:
1.14 deraadt 450: static char next_msg[MAX_COLS + 5];
1.31 otto 451: static int msgon = 0;
1.1 downsj 452:
1.12 pvalchev 453: void
454: i_message(void)
1.1 downsj 455: {
1.25 otto 456: move(y_message, 0);
1.14 deraadt 457: if (next_msg[0] != '\0') {
1.25 otto 458: standoutp();
459: addstrp(next_msg);
460: standendp();
461: clrtoeol();
1.31 otto 462: msgon = TRUE;
1.14 deraadt 463: next_msg[0] = '\0';
1.31 otto 464: } else if (msgon) {
1.25 otto 465: clrtoeol();
1.31 otto 466: msgon = FALSE;
1.14 deraadt 467: }
1.1 downsj 468: }
469:
470: /*
471: * *_header(text) - print the header for the process area
472: */
473:
1.12 pvalchev 474: void
475: i_header(char *text)
1.1 downsj 476: {
1.33 otto 477: if (header_status == Yes && (screen_length > y_header
1.30 otto 478: || !smart_terminal)) {
1.25 otto 479: if (!smart_terminal) {
480: putn();
481: if (fputs(text, stdout) == EOF)
482: exit(1);
483: putn();
484: } else {
485: move(y_header, 0);
486: clrtoeol();
487: addstrp(text);
488: }
1.14 deraadt 489: }
1.1 downsj 490: }
491:
492: /*
493: * *_process(line, thisline) - print one process line
494: */
495:
1.12 pvalchev 496: void
1.25 otto 497: i_process(int line, char *thisline, int hl)
1.1 downsj 498: {
1.14 deraadt 499: /* make sure we are on the correct line */
1.25 otto 500: move(y_procs + line, 0);
1.1 downsj 501:
1.14 deraadt 502: /* truncate the line to conform to our current screen width */
503: thisline[display_width] = '\0';
1.1 downsj 504:
1.14 deraadt 505: /* write the line out */
1.25 otto 506: if (hl && smart_terminal)
507: standoutp();
508: addstrp(thisline);
509: if (hl && smart_terminal)
510: standendp();
511: putn();
512: clrtoeol();
1.1 downsj 513: }
514:
1.12 pvalchev 515: void
1.27 deraadt 516: u_endscreen(void)
1.1 downsj 517: {
1.14 deraadt 518: if (smart_terminal) {
1.25 otto 519: clrtobot();
1.14 deraadt 520: /* move the cursor to a pleasant place */
1.25 otto 521: move(y_idlecursor, x_idlecursor);
1.14 deraadt 522: } else {
523: /*
524: * separate this display from the next with some vertical
525: * room
526: */
527: if (fputs("\n\n", stdout) == EOF)
528: exit(1);
1.1 downsj 529: }
530: }
531:
1.12 pvalchev 532: void
1.33 otto 533: display_header(int status)
1.1 downsj 534: {
1.33 otto 535: header_status = status;
1.1 downsj 536: }
537:
1.12 pvalchev 538: void
1.14 deraadt 539: new_message(int type, const char *msgfmt,...)
540: {
541: va_list ap;
542:
543: va_start(ap, msgfmt);
544: /* first, format the message */
545: vsnprintf(next_msg, sizeof(next_msg), msgfmt, ap);
546: va_end(ap);
547:
1.31 otto 548: if (next_msg[0] != '\0') {
1.14 deraadt 549: /* message there already -- can we clear it? */
1.25 otto 550: /* yes -- write it and clear to end */
551: if ((type & MT_delayed) == 0) {
552: move(y_message, 0);
553: if (type & MT_standout)
554: standoutp();
555: addstrp(next_msg);
556: if (type & MT_standout)
557: standendp();
558: clrtoeol();
1.31 otto 559: msgon = TRUE;
1.14 deraadt 560: next_msg[0] = '\0';
1.31 otto 561: if (smart_terminal)
562: refresh();
1.5 deraadt 563: }
1.1 downsj 564: }
565: }
566:
1.12 pvalchev 567: void
568: clear_message(void)
1.1 downsj 569: {
1.25 otto 570: move(y_message, 0);
571: clrtoeol();
1.1 downsj 572: }
573:
1.25 otto 574:
575: static int
1.32 otto 576: readlinedumb(char *buffer, int size)
1.1 downsj 577: {
1.14 deraadt 578: char *ptr = buffer, ch, cnt = 0, maxcnt = 0;
1.17 deraadt 579: extern volatile sig_atomic_t leaveflag;
580: ssize_t len;
1.14 deraadt 581:
582: /* allow room for null terminator */
583: size -= 1;
584:
585: /* read loop */
1.19 deraadt 586: while ((fflush(stdout), (len = read(STDIN_FILENO, ptr, 1)) > 0)) {
1.17 deraadt 587:
588: if (len == 0 || leaveflag) {
589: end_screen();
590: exit(0);
591: }
592:
1.14 deraadt 593: /* newline means we are done */
594: if ((ch = *ptr) == '\n')
595: break;
596:
597: /* handle special editing characters */
598: if (ch == ch_kill) {
599: /* return null string */
600: *buffer = '\0';
1.25 otto 601: putr();
1.14 deraadt 602: return (-1);
603: } else if (ch == ch_erase) {
604: /* erase previous character */
605: if (cnt <= 0) {
606: /* none to erase! */
607: if (putchar('\7') == EOF)
608: exit(1);
609: } else {
610: if (fputs("\b \b", stdout) == EOF)
611: exit(1);
612: ptr--;
613: cnt--;
614: }
615: }
616: /* check for character validity and buffer overflow */
1.32 otto 617: else if (cnt == size || !isprint(ch)) {
1.14 deraadt 618: /* not legal */
619: if (putchar('\7') == EOF)
620: exit(1);
621: } else {
622: /* echo it and store it in the buffer */
623: if (putchar(ch) == EOF)
624: exit(1);
625: ptr++;
626: cnt++;
627: if (cnt > maxcnt)
628: maxcnt = cnt;
629: }
1.1 downsj 630: }
631:
1.14 deraadt 632: /* all done -- null terminate the string */
633: *ptr = '\0';
634:
635: /* return either inputted number or string length */
1.25 otto 636: putr();
1.32 otto 637: return (cnt == 0 ? -1 : cnt);
1.25 otto 638: }
639:
640: int
1.32 otto 641: readline(char *buffer, int size)
1.25 otto 642: {
643: size_t cnt;
644:
645: /* allow room for null terminator */
646: size -= 1;
647:
648: if (smart_terminal)
649: getnstr(buffer, size);
650: else
1.32 otto 651: return readlinedumb(buffer, size);
1.25 otto 652:
653: cnt = strlen(buffer);
654: if (cnt > 0 && buffer[cnt - 1] == '\n')
655: buffer[cnt - 1] = '\0';
1.32 otto 656: return (cnt == 0 ? -1 : cnt);
1.1 downsj 657: }
658:
659: /* internal support routines */
1.12 pvalchev 660: static int
661: string_count(char **pp)
1.1 downsj 662: {
1.14 deraadt 663: int cnt;
1.1 downsj 664:
1.14 deraadt 665: cnt = 0;
666: while (*pp++ != NULL)
667: cnt++;
668: return (cnt);
1.1 downsj 669: }
670:
1.16 millert 671: #define COPYLEFT(to, from) \
672: do { \
673: len = strlcpy((to), (from), left); \
674: if (len >= left) \
675: return; \
676: p += len; \
677: left -= len; \
678: } while (0)
679:
1.12 pvalchev 680: static void
1.16 millert 681: summary_format(char *buf, size_t left, int *numbers, char **names)
1.1 downsj 682: {
1.14 deraadt 683: char *p, *thisname;
1.16 millert 684: size_t len;
1.14 deraadt 685: int num;
1.1 downsj 686:
1.14 deraadt 687: /* format each number followed by its string */
1.16 millert 688: p = buf;
1.14 deraadt 689: while ((thisname = *names++) != NULL) {
690: /* get the number to format */
691: num = *numbers++;
692:
693: if (num >= 0) {
694: /* is this number in kilobytes? */
695: if (thisname[0] == 'K') {
696: /* yes: format it as a memory value */
1.16 millert 697: COPYLEFT(p, format_k(num));
1.14 deraadt 698:
699: /*
700: * skip over the K, since it was included by
701: * format_k
702: */
1.16 millert 703: COPYLEFT(p, thisname + 1);
1.14 deraadt 704: } else if (num > 0) {
1.16 millert 705: len = snprintf(p, left, "%d%s", num, thisname);
706: if (len == (size_t)-1 || len >= left)
707: return;
708: p += len;
709: left -= len;
1.14 deraadt 710: }
1.16 millert 711: } else {
712: /*
713: * Ignore negative numbers, but display corresponding
714: * string.
715: */
716: COPYLEFT(p, thisname);
1.14 deraadt 717: }
1.1 downsj 718: }
719:
1.14 deraadt 720: /* if the last two characters in the string are ", ", delete them */
721: p -= 2;
1.16 millert 722: if (p >= buf && p[0] == ',' && p[1] == ' ')
1.14 deraadt 723: *p = '\0';
1.1 downsj 724: }
725:
726: /*
727: * printable(str) - make the string pointed to by "str" into one that is
728: * printable (i.e.: all ascii), by converting all non-printable
729: * characters into '?'. Replacements are done in place and a pointer
730: * to the original buffer is returned.
731: */
1.12 pvalchev 732: char *
733: printable(char *str)
1.1 downsj 734: {
1.14 deraadt 735: char *ptr, ch;
1.1 downsj 736:
1.14 deraadt 737: ptr = str;
738: while ((ch = *ptr) != '\0') {
739: if (!isprint(ch))
740: *ptr = '?';
741: ptr++;
1.1 downsj 742: }
1.14 deraadt 743: return (str);
1.25 otto 744: }
745:
746:
747: /*
748: * show_help() - display the help screen; invoked in response to
749: * either 'h' or '?'.
750: */
751: void
752: show_help(void)
753: {
754: if (smart_terminal) {
755: clear();
756: nl();
757: }
758: printwp("These single-character commands are available:\n"
759: "\n"
760: "^L - redraw screen\n"
761: "+ - reset any g, p, or u filters\n"
1.35 jmc 762: "1 - display CPU statistics on a single line\n"
1.25 otto 763: "C - toggle the display of command line arguments\n"
764: "d count - show `count' displays, then exit\n"
765: "e - list errors generated by last \"kill\" or \"renice\" command\n"
766: "h | ? - help; show this text\n"
767: "g string - filter on command name (g+ selects all commands)\n"
768: "I | i - toggle the display of idle processes\n"
769: "k [-sig] pid - send signal `-sig' to process `pid'\n"
770: "n|# count - show `count' processes\n"
1.36 tedu 771: "o field - specify sort order (size, res, cpu, time, pri, pid, command)\n"
1.25 otto 772: "P pid - highlight process `pid' (P+ switches highlighting off)\n"
773: "p pid - display process by `pid' (p+ selects all processes)\n"
774: "q - quit\n"
775: "r count pid - renice process `pid' to nice value `count'\n"
776: "S - toggle the display of system processes\n"
777: "s time - change delay between displays to `time' seconds\n"
778: "T - toggle the display of threads\n"
779: "u user - display processes for `user' (u+ selects all users)\n"
780: "\n");
781:
782: if (smart_terminal) {
783: nonl();
784: refresh();
785: }
786: }
787:
788: /*
789: * show_errors() - display on stdout the current log of errors.
790: */
791: void
792: show_errors(void)
793: {
794: struct errs *errp = errs;
795: int cnt = 0;
796:
797: if (smart_terminal) {
798: clear();
799: nl();
800: }
801: printwp("%d error%s:\n\n", errcnt, errcnt == 1 ? "" : "s");
802: while (cnt++ < errcnt) {
1.38 ! otto 803: printwp("%5s: %s\n", errp->arg,
1.25 otto 804: errp->err == 0 ? "Not a number" : strerror(errp->err));
805: errp++;
806: }
1.38 ! otto 807: printwp("\n");
1.25 otto 808: if (smart_terminal) {
809: nonl();
810: refresh();
811: }
812: }
813:
814: void
815: anykey(void)
816: {
817: int ch;
1.28 deraadt 818: ssize_t len;
1.25 otto 819:
820: standoutp();
821: addstrp("Hit any key to continue: ");
822: standendp();
823: if (smart_terminal)
824: refresh();
825: else
826: fflush(stdout);
827: while (1) {
828: len = read(STDIN_FILENO, &ch, 1);
829: if (len == -1 && errno == EINTR)
830: continue;
831: if (len == 0)
832: exit(1);
833: break;
834: }
1.1 downsj 835: }
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