Annotation of src/usr.bin/top/display.c, Revision 1.41
1.40 otto 1: /* $OpenBSD: display.c,v 1.39 2010/03/24 05:03:15 lum 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: {
1.40 otto 240: static char buf[30];
241:
242: if (buf[0] == '\0')
243: gethostname(buf, sizeof(buf));
244:
1.30 otto 245: if (screen_length > 1 || !smart_terminal) {
246: if (smart_terminal) {
1.40 otto 247: move(0, screen_width - 8 - strlen(buf) - 1);
1.30 otto 248: } else {
249: if (fputs(" ", stdout) == EOF)
250: exit(1);
251: }
1.1 downsj 252: #ifdef DEBUG
1.30 otto 253: {
254: char *foo;
255: foo = ctime(tod);
256: addstrp(foo);
257: }
258: #endif
1.40 otto 259: printwp("%s %-8.8s", buf, &(ctime(tod)[11]));
1.30 otto 260: putn();
1.14 deraadt 261: }
1.1 downsj 262: }
263:
264: /*
265: * *_procstates(total, brkdn, names) - print the process summary line
266: *
267: * Assumptions: cursor is at the beginning of the line on entry
268: */
1.12 pvalchev 269: void
270: i_procstates(int total, int *brkdn)
1.1 downsj 271: {
1.30 otto 272: if (screen_length > 2 || !smart_terminal) {
273: int i;
274: char procstates_buffer[MAX_COLS];
275:
276: move(1, 0);
277: clrtoeol();
278: /* write current number of processes and remember the value */
279: printwp("%d processes:", total);
1.1 downsj 280:
1.30 otto 281: if (smart_terminal)
282: move(1, 15);
283: else {
284: /* put out enough spaces to get to column 15 */
285: i = digits(total);
286: while (i++ < 4) {
287: if (putchar(' ') == EOF)
288: exit(1);
289: }
1.25 otto 290: }
1.14 deraadt 291:
1.30 otto 292: /* format and print the process state summary */
293: summary_format(procstates_buffer, sizeof(procstates_buffer), brkdn,
294: procstate_names);
1.1 downsj 295:
1.30 otto 296: addstrp(procstates_buffer);
297: putn();
298: }
1.1 downsj 299: }
300:
301: /*
302: * *_cpustates(states, names) - print the cpu state percentages
303: *
304: * Assumptions: cursor is on the PREVIOUS line
305: */
306:
307: /* cpustates_tag() calculates the correct tag to use to label the line */
308:
1.12 pvalchev 309: static char *
1.20 millert 310: cpustates_tag(int cpu)
1.1 downsj 311: {
1.30 otto 312: if (screen_length > 3 || !smart_terminal) {
313: static char *tag;
314: static int cpulen, old_width;
315: int i;
316:
317: if (cpulen == 0 && ncpu > 1) {
318: /* compute length of the cpu string */
319: for (i = ncpu; i > 0; cpulen++, i /= 10)
320: continue;
321: }
1.20 millert 322:
1.30 otto 323: if (old_width == screen_width) {
324: if (ncpu > 1) {
325: /* just store the cpu number in the tag */
326: i = tag[3 + cpulen];
327: snprintf(tag + 3, cpulen + 1, "%.*d", cpulen, cpu);
328: tag[3 + cpulen] = i;
329: }
330: } else {
331: /*
332: * use a long tag if it will fit, otherwise use short one.
333: */
334: free(tag);
335: if (cpustate_total_length + 10 + cpulen >= screen_width)
336: i = asprintf(&tag, "CPU%.*d: ", cpulen, cpu);
337: else
338: i = asprintf(&tag, "CPU%.*d states: ", cpulen, cpu);
339: if (i == -1)
340: tag = NULL;
341: else
342: old_width = screen_width;
1.20 millert 343: }
1.30 otto 344: return (tag);
345: } else
1.34 tedu 346: return ("\0");
1.1 downsj 347: }
348:
1.12 pvalchev 349: void
1.20 millert 350: i_cpustates(int64_t *ostates)
1.1 downsj 351: {
1.34 tedu 352: int i, first, cpu;
353: double value;
1.20 millert 354: int64_t *states;
1.34 tedu 355: char **names, *thisname;
356:
357: if (combine_cpus) {
358: static double *values;
359: if (!values) {
360: values = calloc(num_cpustates, sizeof(*values));
361: if (!values)
362: err(1, NULL);
363: }
364: memset(values, 0, num_cpustates * sizeof(*values));
365: for (cpu = 0; cpu < ncpu; cpu++) {
366: names = cpustate_names;
367: states = ostates + (CPUSTATES * cpu);
368: i = 0;
369: while ((thisname = *names++) != NULL) {
370: if (*thisname != '\0') {
371: /* retrieve the value and remember it */
372: values[i++] += *states++;
373: }
374: }
375: }
376: if (screen_length > 2 || !smart_terminal) {
377: names = cpustate_names;
378: i = 0;
379: first = 0;
380: move(2, 0);
381: clrtoeol();
382: addstrp("All CPUs: ");
1.14 deraadt 383:
1.34 tedu 384: while ((thisname = *names++) != NULL) {
385: if (*thisname != '\0') {
386: value = values[i++] / ncpu;
387: /* if percentage is >= 1000, print it as 100% */
388: printwp((value >= 1000 ? "%s%4.0f%% %s" :
389: "%s%4.1f%% %s"), first++ == 0 ? "" : ", ",
390: value / 10., thisname);
391: }
392: }
393: putn();
394: }
395: return;
396: }
1.20 millert 397: for (cpu = 0; cpu < ncpu; cpu++) {
398: /* now walk thru the names and print the line */
399: names = cpustate_names;
1.34 tedu 400: first = 0;
1.20 millert 401: states = ostates + (CPUSTATES * cpu);
1.30 otto 402:
403: if (screen_length > 2 + cpu || !smart_terminal) {
404: move(2 + cpu, 0);
405: clrtoeol();
406: addstrp(cpustates_tag(cpu));
407:
408: while ((thisname = *names++) != NULL) {
409: if (*thisname != '\0') {
410: /* retrieve the value and remember it */
411: value = *states++;
412:
413: /* if percentage is >= 1000, print it as 100% */
414: printwp((value >= 1000 ? "%s%4.0f%% %s" :
1.34 tedu 415: "%s%4.1f%% %s"), first++ == 0 ? "" : ", ",
416: value / 10., thisname);
1.30 otto 417: }
1.20 millert 418: }
1.30 otto 419: putn();
1.14 deraadt 420: }
1.1 downsj 421: }
422: }
423:
424: /*
425: * *_memory(stats) - print "Memory: " followed by the memory summary string
426: */
1.12 pvalchev 427: void
428: i_memory(int *stats)
1.1 downsj 429: {
1.30 otto 430: if (screen_length > y_mem || !smart_terminal) {
431: char memory_buffer[MAX_COLS];
432:
433: move(y_mem, 0);
434: clrtoeol();
435: addstrp("Memory: ");
1.25 otto 436:
1.30 otto 437: /* format and print the memory summary */
438: summary_format(memory_buffer, sizeof(memory_buffer), stats,
439: memory_names);
440: addstrp(memory_buffer);
441: putn();
442: }
1.1 downsj 443: }
444:
445: /*
446: * *_message() - print the next pending message line, or erase the one
447: * that is there.
448: */
449:
450: /*
451: * i_message is funny because it gets its message asynchronously (with
452: * respect to screen updates).
453: */
454:
1.14 deraadt 455: static char next_msg[MAX_COLS + 5];
1.31 otto 456: static int msgon = 0;
1.1 downsj 457:
1.12 pvalchev 458: void
459: i_message(void)
1.1 downsj 460: {
1.25 otto 461: move(y_message, 0);
1.14 deraadt 462: if (next_msg[0] != '\0') {
1.25 otto 463: standoutp();
464: addstrp(next_msg);
465: standendp();
466: clrtoeol();
1.31 otto 467: msgon = TRUE;
1.14 deraadt 468: next_msg[0] = '\0';
1.31 otto 469: } else if (msgon) {
1.25 otto 470: clrtoeol();
1.31 otto 471: msgon = FALSE;
1.14 deraadt 472: }
1.1 downsj 473: }
474:
475: /*
476: * *_header(text) - print the header for the process area
477: */
478:
1.12 pvalchev 479: void
480: i_header(char *text)
1.1 downsj 481: {
1.33 otto 482: if (header_status == Yes && (screen_length > y_header
1.30 otto 483: || !smart_terminal)) {
1.25 otto 484: if (!smart_terminal) {
485: putn();
486: if (fputs(text, stdout) == EOF)
487: exit(1);
488: putn();
489: } else {
490: move(y_header, 0);
491: clrtoeol();
492: addstrp(text);
493: }
1.14 deraadt 494: }
1.1 downsj 495: }
496:
497: /*
498: * *_process(line, thisline) - print one process line
499: */
500:
1.12 pvalchev 501: void
1.25 otto 502: i_process(int line, char *thisline, int hl)
1.1 downsj 503: {
1.14 deraadt 504: /* make sure we are on the correct line */
1.25 otto 505: move(y_procs + line, 0);
1.1 downsj 506:
1.14 deraadt 507: /* truncate the line to conform to our current screen width */
508: thisline[display_width] = '\0';
1.1 downsj 509:
1.14 deraadt 510: /* write the line out */
1.25 otto 511: if (hl && smart_terminal)
512: standoutp();
513: addstrp(thisline);
514: if (hl && smart_terminal)
515: standendp();
516: putn();
517: clrtoeol();
1.1 downsj 518: }
519:
1.12 pvalchev 520: void
1.27 deraadt 521: u_endscreen(void)
1.1 downsj 522: {
1.14 deraadt 523: if (smart_terminal) {
1.25 otto 524: clrtobot();
1.14 deraadt 525: /* move the cursor to a pleasant place */
1.25 otto 526: move(y_idlecursor, x_idlecursor);
1.14 deraadt 527: } else {
528: /*
529: * separate this display from the next with some vertical
530: * room
531: */
532: if (fputs("\n\n", stdout) == EOF)
533: exit(1);
1.1 downsj 534: }
535: }
536:
1.12 pvalchev 537: void
1.33 otto 538: display_header(int status)
1.1 downsj 539: {
1.33 otto 540: header_status = status;
1.1 downsj 541: }
542:
1.12 pvalchev 543: void
1.14 deraadt 544: new_message(int type, const char *msgfmt,...)
545: {
546: va_list ap;
547:
548: va_start(ap, msgfmt);
549: /* first, format the message */
550: vsnprintf(next_msg, sizeof(next_msg), msgfmt, ap);
551: va_end(ap);
552:
1.31 otto 553: if (next_msg[0] != '\0') {
1.14 deraadt 554: /* message there already -- can we clear it? */
1.25 otto 555: /* yes -- write it and clear to end */
556: if ((type & MT_delayed) == 0) {
557: move(y_message, 0);
558: if (type & MT_standout)
559: standoutp();
560: addstrp(next_msg);
561: if (type & MT_standout)
562: standendp();
563: clrtoeol();
1.31 otto 564: msgon = TRUE;
1.14 deraadt 565: next_msg[0] = '\0';
1.31 otto 566: if (smart_terminal)
567: refresh();
1.5 deraadt 568: }
1.1 downsj 569: }
570: }
571:
1.12 pvalchev 572: void
573: clear_message(void)
1.1 downsj 574: {
1.25 otto 575: move(y_message, 0);
576: clrtoeol();
1.1 downsj 577: }
578:
1.25 otto 579:
580: static int
1.32 otto 581: readlinedumb(char *buffer, int size)
1.1 downsj 582: {
1.14 deraadt 583: char *ptr = buffer, ch, cnt = 0, maxcnt = 0;
1.17 deraadt 584: extern volatile sig_atomic_t leaveflag;
585: ssize_t len;
1.14 deraadt 586:
587: /* allow room for null terminator */
588: size -= 1;
589:
590: /* read loop */
1.19 deraadt 591: while ((fflush(stdout), (len = read(STDIN_FILENO, ptr, 1)) > 0)) {
1.17 deraadt 592:
593: if (len == 0 || leaveflag) {
594: end_screen();
595: exit(0);
596: }
597:
1.14 deraadt 598: /* newline means we are done */
599: if ((ch = *ptr) == '\n')
600: break;
601:
602: /* handle special editing characters */
603: if (ch == ch_kill) {
604: /* return null string */
605: *buffer = '\0';
1.25 otto 606: putr();
1.14 deraadt 607: return (-1);
608: } else if (ch == ch_erase) {
609: /* erase previous character */
610: if (cnt <= 0) {
611: /* none to erase! */
612: if (putchar('\7') == EOF)
613: exit(1);
614: } else {
615: if (fputs("\b \b", stdout) == EOF)
616: exit(1);
617: ptr--;
618: cnt--;
619: }
620: }
621: /* check for character validity and buffer overflow */
1.32 otto 622: else if (cnt == size || !isprint(ch)) {
1.14 deraadt 623: /* not legal */
624: if (putchar('\7') == EOF)
625: exit(1);
626: } else {
627: /* echo it and store it in the buffer */
628: if (putchar(ch) == EOF)
629: exit(1);
630: ptr++;
631: cnt++;
632: if (cnt > maxcnt)
633: maxcnt = cnt;
634: }
1.1 downsj 635: }
636:
1.14 deraadt 637: /* all done -- null terminate the string */
638: *ptr = '\0';
639:
640: /* return either inputted number or string length */
1.25 otto 641: putr();
1.32 otto 642: return (cnt == 0 ? -1 : cnt);
1.25 otto 643: }
644:
645: int
1.32 otto 646: readline(char *buffer, int size)
1.25 otto 647: {
648: size_t cnt;
649:
650: /* allow room for null terminator */
651: size -= 1;
652:
653: if (smart_terminal)
654: getnstr(buffer, size);
655: else
1.32 otto 656: return readlinedumb(buffer, size);
1.25 otto 657:
658: cnt = strlen(buffer);
659: if (cnt > 0 && buffer[cnt - 1] == '\n')
660: buffer[cnt - 1] = '\0';
1.32 otto 661: return (cnt == 0 ? -1 : cnt);
1.1 downsj 662: }
663:
664: /* internal support routines */
1.12 pvalchev 665: static int
666: string_count(char **pp)
1.1 downsj 667: {
1.14 deraadt 668: int cnt;
1.1 downsj 669:
1.14 deraadt 670: cnt = 0;
671: while (*pp++ != NULL)
672: cnt++;
673: return (cnt);
1.1 downsj 674: }
675:
1.16 millert 676: #define COPYLEFT(to, from) \
677: do { \
678: len = strlcpy((to), (from), left); \
679: if (len >= left) \
680: return; \
681: p += len; \
682: left -= len; \
683: } while (0)
684:
1.12 pvalchev 685: static void
1.16 millert 686: summary_format(char *buf, size_t left, int *numbers, char **names)
1.1 downsj 687: {
1.14 deraadt 688: char *p, *thisname;
1.16 millert 689: size_t len;
1.14 deraadt 690: int num;
1.1 downsj 691:
1.14 deraadt 692: /* format each number followed by its string */
1.16 millert 693: p = buf;
1.14 deraadt 694: while ((thisname = *names++) != NULL) {
695: /* get the number to format */
696: num = *numbers++;
697:
698: if (num >= 0) {
699: /* is this number in kilobytes? */
700: if (thisname[0] == 'K') {
701: /* yes: format it as a memory value */
1.16 millert 702: COPYLEFT(p, format_k(num));
1.14 deraadt 703:
704: /*
705: * skip over the K, since it was included by
706: * format_k
707: */
1.16 millert 708: COPYLEFT(p, thisname + 1);
1.14 deraadt 709: } else if (num > 0) {
1.16 millert 710: len = snprintf(p, left, "%d%s", num, thisname);
711: if (len == (size_t)-1 || len >= left)
712: return;
713: p += len;
714: left -= len;
1.14 deraadt 715: }
1.16 millert 716: } else {
717: /*
718: * Ignore negative numbers, but display corresponding
719: * string.
720: */
721: COPYLEFT(p, thisname);
1.14 deraadt 722: }
1.1 downsj 723: }
724:
1.14 deraadt 725: /* if the last two characters in the string are ", ", delete them */
726: p -= 2;
1.16 millert 727: if (p >= buf && p[0] == ',' && p[1] == ' ')
1.14 deraadt 728: *p = '\0';
1.1 downsj 729: }
730:
731: /*
732: * printable(str) - make the string pointed to by "str" into one that is
733: * printable (i.e.: all ascii), by converting all non-printable
734: * characters into '?'. Replacements are done in place and a pointer
735: * to the original buffer is returned.
736: */
1.12 pvalchev 737: char *
738: printable(char *str)
1.1 downsj 739: {
1.14 deraadt 740: char *ptr, ch;
1.1 downsj 741:
1.14 deraadt 742: ptr = str;
743: while ((ch = *ptr) != '\0') {
744: if (!isprint(ch))
745: *ptr = '?';
746: ptr++;
1.1 downsj 747: }
1.14 deraadt 748: return (str);
1.25 otto 749: }
750:
751:
752: /*
753: * show_help() - display the help screen; invoked in response to
754: * either 'h' or '?'.
755: */
756: void
757: show_help(void)
758: {
759: if (smart_terminal) {
760: clear();
761: nl();
762: }
763: printwp("These single-character commands are available:\n"
764: "\n"
765: "^L - redraw screen\n"
1.39 lum 766: "<space> - update screen\n"
1.25 otto 767: "+ - reset any g, p, or u filters\n"
1.35 jmc 768: "1 - display CPU statistics on a single line\n"
1.25 otto 769: "C - toggle the display of command line arguments\n"
770: "d count - show `count' displays, then exit\n"
771: "e - list errors generated by last \"kill\" or \"renice\" command\n"
1.41 ! jsing 772: "g string - filter on command name (g+ selects all commands)\n"
1.25 otto 773: "h | ? - help; show this text\n"
1.41 ! jsing 774: "H - toggle the display of threads\n"
1.25 otto 775: "I | i - toggle the display of idle processes\n"
776: "k [-sig] pid - send signal `-sig' to process `pid'\n"
777: "n|# count - show `count' processes\n"
1.36 tedu 778: "o field - specify sort order (size, res, cpu, time, pri, pid, command)\n"
1.25 otto 779: "P pid - highlight process `pid' (P+ switches highlighting off)\n"
780: "p pid - display process by `pid' (p+ selects all processes)\n"
781: "q - quit\n"
782: "r count pid - renice process `pid' to nice value `count'\n"
783: "S - toggle the display of system processes\n"
784: "s time - change delay between displays to `time' seconds\n"
785: "u user - display processes for `user' (u+ selects all users)\n"
786: "\n");
787:
788: if (smart_terminal) {
789: nonl();
790: refresh();
791: }
792: }
793:
794: /*
795: * show_errors() - display on stdout the current log of errors.
796: */
797: void
798: show_errors(void)
799: {
800: struct errs *errp = errs;
801: int cnt = 0;
802:
803: if (smart_terminal) {
804: clear();
805: nl();
806: }
807: printwp("%d error%s:\n\n", errcnt, errcnt == 1 ? "" : "s");
808: while (cnt++ < errcnt) {
1.38 otto 809: printwp("%5s: %s\n", errp->arg,
1.25 otto 810: errp->err == 0 ? "Not a number" : strerror(errp->err));
811: errp++;
812: }
1.38 otto 813: printwp("\n");
1.25 otto 814: if (smart_terminal) {
815: nonl();
816: refresh();
817: }
818: }
819:
820: void
821: anykey(void)
822: {
823: int ch;
1.28 deraadt 824: ssize_t len;
1.25 otto 825:
826: standoutp();
827: addstrp("Hit any key to continue: ");
828: standendp();
829: if (smart_terminal)
830: refresh();
831: else
832: fflush(stdout);
833: while (1) {
834: len = read(STDIN_FILENO, &ch, 1);
835: if (len == -1 && errno == EINTR)
836: continue;
837: if (len == 0)
838: exit(1);
839: break;
840: }
1.1 downsj 841: }
![[BACK]](/icons/back.gif){kind=icon}
Return to display.c CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [local] / src / usr.bin / top