Annotation of src/usr.bin/top/display.c, Revision 1.64
1.64 ! kn 1: /* $OpenBSD: display.c,v 1.63 2020/07/26 21:59:16 kn 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>
1.51 guenther 49: #include <sys/time.h>
1.20 millert 50: #include <sys/sched.h>
1.25 otto 51: #include <curses.h>
52: #include <errno.h>
1.2 downsj 53: #include <stdio.h>
1.1 downsj 54: #include <ctype.h>
1.20 millert 55: #include <err.h>
1.25 otto 56: #include <signal.h>
1.2 downsj 57: #include <stdlib.h>
58: #include <string.h>
59: #include <unistd.h>
1.60 kn 60: #include <stdbool.h>
1.1 downsj 61:
62: #include "screen.h" /* interface to screen package */
63: #include "layout.h" /* defines for screen position layout */
64: #include "display.h"
65: #include "top.h"
66: #include "machine.h" /* we should eliminate this!!! */
67: #include "utils.h"
68:
69: #ifdef DEBUG
1.14 deraadt 70: FILE *debug;
1.1 downsj 71: #endif
72:
1.14 deraadt 73: static int display_width = MAX_COLS;
74:
1.20 millert 75: static char *cpustates_tag(int);
1.14 deraadt 76: static int string_count(char **);
1.16 millert 77: static void summary_format(char *, size_t, int *, char **);
1.32 otto 78: static int readlinedumb(char *, int);
1.2 downsj 79:
1.1 downsj 80: #define lineindex(l) ((l)*display_width)
81:
1.18 otto 82: /* things initialized by display_init and used throughout */
1.1 downsj 83:
84: /* buffer of proc information lines for display updating */
1.14 deraadt 85: char *screenbuf = NULL;
1.1 downsj 86:
1.14 deraadt 87: static char **procstate_names;
88: static char **cpustate_names;
89: static char **memory_names;
90:
91: static int num_cpustates;
92:
93: static int *cpustate_columns;
94: static int cpustate_total_length;
95:
1.20 millert 96: /* display ips */
97: int y_mem;
98: int y_message;
99: int y_header;
100: int y_idlecursor;
101: int y_procs;
102: extern int ncpu;
1.57 cheloha 103: extern int ncpuonline;
1.34 tedu 104: extern int combine_cpus;
1.49 mpi 105: extern struct process_select ps;
1.20 millert 106:
1.60 kn 107: int header_status = true;
1.1 downsj 108:
1.25 otto 109: static int
110: empty(void)
111: {
112: return OK;
113: }
114:
115: static int
116: myfputs(const char *s)
117: {
118: return fputs(s, stdout);
119: }
120:
121: static int (*addstrp)(const char *);
122: static int (*printwp)(const char *, ...);
123: static int (*standoutp)(void);
124: static int (*standendp)(void);
125:
1.12 pvalchev 126: int
127: display_resize(void)
1.1 downsj 128: {
1.57 cheloha 129: int cpu_lines, display_lines;
1.34 tedu 130:
1.57 cheloha 131: ncpuonline = getncpuonline();
132: cpu_lines = (combine_cpus ? 1 : ncpuonline);
1.34 tedu 133: y_mem = 2 + cpu_lines;
134: y_header = 4 + cpu_lines;
135: y_procs = 5 + cpu_lines;
1.1 downsj 136:
1.14 deraadt 137: /* calculate the current dimensions */
138: /* if operating in "dumb" mode, we only need one line */
1.37 otto 139: display_lines = smart_terminal ? screen_length - y_procs : 1;
1.14 deraadt 140:
1.57 cheloha 141: y_idlecursor = y_message = 3 + (combine_cpus ? 1 : ncpuonline);
1.30 otto 142: if (screen_length <= y_message)
143: y_idlecursor = y_message = screen_length - 1;
144:
1.14 deraadt 145: /*
146: * we don't want more than MAX_COLS columns, since the
147: * machine-dependent modules make static allocations based on
148: * MAX_COLS and we don't want to run off the end of their buffers
149: */
150: display_width = screen_width;
151: if (display_width >= MAX_COLS)
152: display_width = MAX_COLS - 1;
153:
1.42 lum 154: if (display_lines < 0)
155: display_lines = 0;
156:
1.14 deraadt 157: /* return number of lines available */
158: /* for dumb terminals, pretend like we can show any amount */
159: return (smart_terminal ? display_lines : Largest);
1.1 downsj 160: }
161:
1.12 pvalchev 162: int
1.14 deraadt 163: display_init(struct statics * statics)
1.1 downsj 164: {
1.34 tedu 165: int display_lines, *ip, i;
1.14 deraadt 166: char **pp;
167:
1.25 otto 168: if (smart_terminal) {
169: addstrp = addstr;
1.45 guenther 170: printwp = printw;
1.25 otto 171: standoutp = standout;
172: standendp = standend;
173: } else {
174: addstrp = myfputs;
175: printwp = printf;
176: standoutp = empty;
177: standendp = empty;
178: }
179:
1.14 deraadt 180: /* call resize to do the dirty work */
181: display_lines = display_resize();
182:
183: /* only do the rest if we need to */
1.30 otto 184: /* save pointers and allocate space for names */
185: procstate_names = statics->procstate_names;
186:
187: cpustate_names = statics->cpustate_names;
188: num_cpustates = string_count(cpustate_names);
189:
190: cpustate_columns = calloc(num_cpustates, sizeof(int));
191: if (cpustate_columns == NULL)
192: err(1, NULL);
193:
194: memory_names = statics->memory_names;
195:
196: /* calculate starting columns where needed */
197: cpustate_total_length = 0;
198: pp = cpustate_names;
199: ip = cpustate_columns;
200: while (*pp != NULL) {
201: if ((i = strlen(*pp++)) > 0) {
202: *ip++ = cpustate_total_length;
203: cpustate_total_length += i + 8;
1.20 millert 204: }
1.30 otto 205: }
1.14 deraadt 206:
207: /* return number of lines available */
208: return (display_lines);
1.1 downsj 209: }
1.54 deraadt 210:
1.50 tedu 211: static void
212: format_uptime(char *buf, size_t buflen)
213: {
1.53 cheloha 214: time_t uptime;
1.50 tedu 215: int days, hrs, mins;
1.53 cheloha 216: struct timespec boottime;
1.50 tedu 217:
218: /*
219: * Print how long system has been up.
220: */
1.53 cheloha 221: if (clock_gettime(CLOCK_BOOTTIME, &boottime) != -1) {
222: uptime = boottime.tv_sec;
1.50 tedu 223: uptime += 30;
224: days = uptime / (3600 * 24);
225: uptime %= (3600 * 24);
226: hrs = uptime / 3600;
227: uptime %= 3600;
228: mins = uptime / 60;
229: if (days > 0)
230: snprintf(buf, buflen, "up %d day%s, %2d:%02d",
231: days, days > 1 ? "s" : "", hrs, mins);
232: else
233: snprintf(buf, buflen, "up %2d:%02d",
234: hrs, mins);
235: }
236: }
237:
1.1 downsj 238:
1.12 pvalchev 239: void
240: i_loadave(pid_t mpid, double *avenrun)
1.1 downsj 241: {
1.30 otto 242: if (screen_length > 1 || !smart_terminal) {
243: int i;
1.14 deraadt 244:
1.30 otto 245: move(0, 0);
246: clrtoeol();
1.1 downsj 247:
1.30 otto 248: addstrp("load averages");
249: /* mpid == -1 implies this system doesn't have an _mpid */
250: if (mpid != -1)
251: printwp("last pid: %5ld; ", (long) mpid);
1.1 downsj 252:
1.30 otto 253: for (i = 0; i < 3; i++)
254: printwp("%c %5.2f", i == 0 ? ':' : ',', avenrun[i]);
255: }
1.50 tedu 256:
1.1 downsj 257: }
258:
1.14 deraadt 259: /*
260: * Display the current time.
261: * "ctime" always returns a string that looks like this:
262: *
263: * Sun Sep 16 01:03:52 1973
264: * 012345678901234567890123
265: * 1 2
266: *
267: * We want indices 11 thru 18 (length 8).
268: */
269:
1.12 pvalchev 270: void
1.14 deraadt 271: i_timeofday(time_t * tod)
1.1 downsj 272: {
1.40 otto 273: static char buf[30];
274:
275: if (buf[0] == '\0')
276: gethostname(buf, sizeof(buf));
277:
1.30 otto 278: if (screen_length > 1 || !smart_terminal) {
279: if (smart_terminal) {
1.40 otto 280: move(0, screen_width - 8 - strlen(buf) - 1);
1.30 otto 281: } else {
282: if (fputs(" ", stdout) == EOF)
283: exit(1);
284: }
1.1 downsj 285: #ifdef DEBUG
1.30 otto 286: {
287: char *foo;
288: foo = ctime(tod);
289: addstrp(foo);
290: }
291: #endif
1.40 otto 292: printwp("%s %-8.8s", buf, &(ctime(tod)[11]));
1.30 otto 293: putn();
1.14 deraadt 294: }
1.1 downsj 295: }
296:
297: /*
1.44 guenther 298: * *_procstates(total, states, threads) - print the process/thread summary line
1.1 downsj 299: *
300: * Assumptions: cursor is at the beginning of the line on entry
301: */
1.12 pvalchev 302: void
1.44 guenther 303: i_procstates(int total, int *states, int threads)
1.1 downsj 304: {
1.30 otto 305: if (screen_length > 2 || !smart_terminal) {
306: char procstates_buffer[MAX_COLS];
1.50 tedu 307: char uptime[40];
1.30 otto 308:
309: move(1, 0);
310: clrtoeol();
1.44 guenther 311: /* write current number of procs and remember the value */
1.60 kn 312: printwp("%d %s: ", total, threads ? "threads" : "processes");
1.14 deraadt 313:
1.30 otto 314: /* format and print the process state summary */
1.44 guenther 315: summary_format(procstates_buffer, sizeof(procstates_buffer),
316: states, procstate_names);
1.1 downsj 317:
1.30 otto 318: addstrp(procstates_buffer);
1.50 tedu 319:
320: format_uptime(uptime, sizeof(uptime));
321: if (smart_terminal)
322: move(1, screen_width - strlen(uptime));
323: else
324: printwp(" ");
325: printwp("%s", uptime);
1.30 otto 326: putn();
327: }
1.1 downsj 328: }
329:
330: /*
1.44 guenther 331: * *_cpustates(states) - print the cpu state percentages
1.1 downsj 332: *
333: * Assumptions: cursor is on the PREVIOUS line
334: */
335:
336: /* cpustates_tag() calculates the correct tag to use to label the line */
337:
1.12 pvalchev 338: static char *
1.20 millert 339: cpustates_tag(int cpu)
1.1 downsj 340: {
1.30 otto 341: if (screen_length > 3 || !smart_terminal) {
342: static char *tag;
343: static int cpulen, old_width;
344: int i;
345:
346: if (cpulen == 0 && ncpu > 1) {
347: /* compute length of the cpu string */
348: for (i = ncpu; i > 0; cpulen++, i /= 10)
349: continue;
350: }
1.20 millert 351:
1.30 otto 352: if (old_width == screen_width) {
353: if (ncpu > 1) {
354: /* just store the cpu number in the tag */
355: i = tag[3 + cpulen];
356: snprintf(tag + 3, cpulen + 1, "%.*d", cpulen, cpu);
357: tag[3 + cpulen] = i;
358: }
359: } else {
360: /*
361: * use a long tag if it will fit, otherwise use short one.
362: */
363: free(tag);
364: if (cpustate_total_length + 10 + cpulen >= screen_width)
365: i = asprintf(&tag, "CPU%.*d: ", cpulen, cpu);
366: else
367: i = asprintf(&tag, "CPU%.*d states: ", cpulen, cpu);
368: if (i == -1)
369: tag = NULL;
370: else
371: old_width = screen_width;
1.20 millert 372: }
1.30 otto 373: return (tag);
374: } else
1.34 tedu 375: return ("\0");
1.1 downsj 376: }
377:
1.12 pvalchev 378: void
1.57 cheloha 379: i_cpustates(int64_t *ostates, int *online)
1.1 downsj 380: {
1.57 cheloha 381: int i, first, cpu, cpu_line;
1.34 tedu 382: double value;
1.20 millert 383: int64_t *states;
1.34 tedu 384: char **names, *thisname;
385:
386: if (combine_cpus) {
387: static double *values;
388: if (!values) {
389: values = calloc(num_cpustates, sizeof(*values));
390: if (!values)
391: err(1, NULL);
392: }
393: memset(values, 0, num_cpustates * sizeof(*values));
394: for (cpu = 0; cpu < ncpu; cpu++) {
1.57 cheloha 395: if (!online[cpu])
396: continue;
1.34 tedu 397: names = cpustate_names;
398: states = ostates + (CPUSTATES * cpu);
399: i = 0;
400: while ((thisname = *names++) != NULL) {
401: if (*thisname != '\0') {
402: /* retrieve the value and remember it */
403: values[i++] += *states++;
404: }
405: }
406: }
407: if (screen_length > 2 || !smart_terminal) {
408: names = cpustate_names;
409: i = 0;
410: first = 0;
411: move(2, 0);
412: clrtoeol();
1.57 cheloha 413: printwp("%-3d CPUs: ", ncpuonline);
1.14 deraadt 414:
1.34 tedu 415: while ((thisname = *names++) != NULL) {
416: if (*thisname != '\0') {
1.57 cheloha 417: value = values[i++] / ncpuonline;
1.34 tedu 418: /* if percentage is >= 1000, print it as 100% */
419: printwp((value >= 1000 ? "%s%4.0f%% %s" :
420: "%s%4.1f%% %s"), first++ == 0 ? "" : ", ",
421: value / 10., thisname);
422: }
423: }
424: putn();
425: }
426: return;
427: }
1.57 cheloha 428: for (cpu = cpu_line = 0; cpu < ncpu; cpu++) {
429: /* skip if offline */
430: if (!online[cpu])
431: continue;
432:
1.20 millert 433: /* now walk thru the names and print the line */
434: names = cpustate_names;
1.34 tedu 435: first = 0;
1.20 millert 436: states = ostates + (CPUSTATES * cpu);
1.30 otto 437:
1.57 cheloha 438: if (screen_length > 2 + cpu_line || !smart_terminal) {
439: move(2 + cpu_line, 0);
1.30 otto 440: clrtoeol();
441: addstrp(cpustates_tag(cpu));
442:
443: while ((thisname = *names++) != NULL) {
444: if (*thisname != '\0') {
445: /* retrieve the value and remember it */
446: value = *states++;
447:
448: /* if percentage is >= 1000, print it as 100% */
449: printwp((value >= 1000 ? "%s%4.0f%% %s" :
1.34 tedu 450: "%s%4.1f%% %s"), first++ == 0 ? "" : ", ",
451: value / 10., thisname);
1.30 otto 452: }
1.20 millert 453: }
1.30 otto 454: putn();
1.57 cheloha 455: cpu_line++;
1.14 deraadt 456: }
1.1 downsj 457: }
458: }
459:
460: /*
461: * *_memory(stats) - print "Memory: " followed by the memory summary string
462: */
1.12 pvalchev 463: void
464: i_memory(int *stats)
1.1 downsj 465: {
1.30 otto 466: if (screen_length > y_mem || !smart_terminal) {
467: char memory_buffer[MAX_COLS];
468:
469: move(y_mem, 0);
470: clrtoeol();
471: addstrp("Memory: ");
1.25 otto 472:
1.30 otto 473: /* format and print the memory summary */
474: summary_format(memory_buffer, sizeof(memory_buffer), stats,
475: memory_names);
476: addstrp(memory_buffer);
477: putn();
478: }
1.1 downsj 479: }
480:
481: /*
482: * *_message() - print the next pending message line, or erase the one
483: * that is there.
484: */
485:
486: /*
487: * i_message is funny because it gets its message asynchronously (with
488: * respect to screen updates).
489: */
490:
1.14 deraadt 491: static char next_msg[MAX_COLS + 5];
1.31 otto 492: static int msgon = 0;
1.1 downsj 493:
1.12 pvalchev 494: void
495: i_message(void)
1.1 downsj 496: {
1.25 otto 497: move(y_message, 0);
1.14 deraadt 498: if (next_msg[0] != '\0') {
1.25 otto 499: standoutp();
500: addstrp(next_msg);
501: standendp();
502: clrtoeol();
1.31 otto 503: msgon = TRUE;
1.14 deraadt 504: next_msg[0] = '\0';
1.31 otto 505: } else if (msgon) {
1.25 otto 506: clrtoeol();
1.31 otto 507: msgon = FALSE;
1.14 deraadt 508: }
1.1 downsj 509: }
510:
511: /*
512: * *_header(text) - print the header for the process area
513: */
514:
1.12 pvalchev 515: void
516: i_header(char *text)
1.1 downsj 517: {
1.60 kn 518: if (header_status && (screen_length > y_header
1.30 otto 519: || !smart_terminal)) {
1.25 otto 520: if (!smart_terminal) {
521: putn();
522: if (fputs(text, stdout) == EOF)
523: exit(1);
524: putn();
525: } else {
526: move(y_header, 0);
527: clrtoeol();
528: addstrp(text);
529: }
1.14 deraadt 530: }
1.1 downsj 531: }
532:
533: /*
534: * *_process(line, thisline) - print one process line
535: */
536:
1.12 pvalchev 537: void
1.25 otto 538: i_process(int line, char *thisline, int hl)
1.1 downsj 539: {
1.14 deraadt 540: /* make sure we are on the correct line */
1.25 otto 541: move(y_procs + line, 0);
1.1 downsj 542:
1.14 deraadt 543: /* truncate the line to conform to our current screen width */
544: thisline[display_width] = '\0';
1.1 downsj 545:
1.14 deraadt 546: /* write the line out */
1.25 otto 547: if (hl && smart_terminal)
548: standoutp();
549: addstrp(thisline);
550: if (hl && smart_terminal)
551: standendp();
552: putn();
553: clrtoeol();
1.1 downsj 554: }
555:
1.12 pvalchev 556: void
1.27 deraadt 557: u_endscreen(void)
1.1 downsj 558: {
1.14 deraadt 559: if (smart_terminal) {
1.25 otto 560: clrtobot();
1.14 deraadt 561: /* move the cursor to a pleasant place */
1.25 otto 562: move(y_idlecursor, x_idlecursor);
1.14 deraadt 563: } else {
564: /*
565: * separate this display from the next with some vertical
566: * room
567: */
568: if (fputs("\n\n", stdout) == EOF)
569: exit(1);
1.1 downsj 570: }
571: }
572:
1.12 pvalchev 573: void
1.33 otto 574: display_header(int status)
1.1 downsj 575: {
1.33 otto 576: header_status = status;
1.1 downsj 577: }
578:
1.12 pvalchev 579: void
1.14 deraadt 580: new_message(int type, const char *msgfmt,...)
581: {
582: va_list ap;
583:
584: va_start(ap, msgfmt);
585: /* first, format the message */
586: vsnprintf(next_msg, sizeof(next_msg), msgfmt, ap);
587: va_end(ap);
588:
1.31 otto 589: if (next_msg[0] != '\0') {
1.14 deraadt 590: /* message there already -- can we clear it? */
1.25 otto 591: /* yes -- write it and clear to end */
592: if ((type & MT_delayed) == 0) {
593: move(y_message, 0);
594: if (type & MT_standout)
595: standoutp();
596: addstrp(next_msg);
597: if (type & MT_standout)
598: standendp();
599: clrtoeol();
1.31 otto 600: msgon = TRUE;
1.14 deraadt 601: next_msg[0] = '\0';
1.31 otto 602: if (smart_terminal)
603: refresh();
1.5 deraadt 604: }
1.1 downsj 605: }
606: }
607:
1.12 pvalchev 608: void
609: clear_message(void)
1.1 downsj 610: {
1.25 otto 611: move(y_message, 0);
612: clrtoeol();
1.1 downsj 613: }
614:
1.25 otto 615:
616: static int
1.32 otto 617: readlinedumb(char *buffer, int size)
1.1 downsj 618: {
1.14 deraadt 619: char *ptr = buffer, ch, cnt = 0, maxcnt = 0;
1.17 deraadt 620: extern volatile sig_atomic_t leaveflag;
621: ssize_t len;
1.14 deraadt 622:
623: /* allow room for null terminator */
624: size -= 1;
625:
626: /* read loop */
1.19 deraadt 627: while ((fflush(stdout), (len = read(STDIN_FILENO, ptr, 1)) > 0)) {
1.17 deraadt 628:
629: if (len == 0 || leaveflag) {
630: end_screen();
631: exit(0);
632: }
633:
1.14 deraadt 634: /* newline means we are done */
635: if ((ch = *ptr) == '\n')
636: break;
637:
638: /* handle special editing characters */
639: if (ch == ch_kill) {
640: /* return null string */
641: *buffer = '\0';
1.25 otto 642: putr();
1.14 deraadt 643: return (-1);
644: } else if (ch == ch_erase) {
645: /* erase previous character */
646: if (cnt <= 0) {
647: /* none to erase! */
648: if (putchar('\7') == EOF)
649: exit(1);
650: } else {
651: if (fputs("\b \b", stdout) == EOF)
652: exit(1);
653: ptr--;
654: cnt--;
655: }
656: }
657: /* check for character validity and buffer overflow */
1.46 deraadt 658: else if (cnt == size || !isprint((unsigned char)ch)) {
1.14 deraadt 659: /* not legal */
660: if (putchar('\7') == EOF)
661: exit(1);
662: } else {
663: /* echo it and store it in the buffer */
664: if (putchar(ch) == EOF)
665: exit(1);
666: ptr++;
667: cnt++;
668: if (cnt > maxcnt)
669: maxcnt = cnt;
670: }
1.1 downsj 671: }
672:
1.14 deraadt 673: /* all done -- null terminate the string */
674: *ptr = '\0';
675:
676: /* return either inputted number or string length */
1.25 otto 677: putr();
1.32 otto 678: return (cnt == 0 ? -1 : cnt);
1.25 otto 679: }
680:
681: int
1.32 otto 682: readline(char *buffer, int size)
1.25 otto 683: {
684: size_t cnt;
685:
686: /* allow room for null terminator */
687: size -= 1;
688:
1.47 guenther 689: if (smart_terminal) {
690: int y, x;
691: getyx(stdscr, y, x);
692: while (getnstr(buffer, size) == KEY_RESIZE)
693: move(y, x);
694: } else
1.32 otto 695: return readlinedumb(buffer, size);
1.25 otto 696:
697: cnt = strlen(buffer);
698: if (cnt > 0 && buffer[cnt - 1] == '\n')
699: buffer[cnt - 1] = '\0';
1.32 otto 700: return (cnt == 0 ? -1 : cnt);
1.1 downsj 701: }
702:
703: /* internal support routines */
1.12 pvalchev 704: static int
705: string_count(char **pp)
1.1 downsj 706: {
1.14 deraadt 707: int cnt;
1.1 downsj 708:
1.14 deraadt 709: cnt = 0;
710: while (*pp++ != NULL)
711: cnt++;
712: return (cnt);
1.1 downsj 713: }
714:
1.16 millert 715: #define COPYLEFT(to, from) \
716: do { \
717: len = strlcpy((to), (from), left); \
718: if (len >= left) \
719: return; \
720: p += len; \
721: left -= len; \
722: } while (0)
723:
1.12 pvalchev 724: static void
1.16 millert 725: summary_format(char *buf, size_t left, int *numbers, char **names)
1.1 downsj 726: {
1.14 deraadt 727: char *p, *thisname;
1.59 deraadt 728: int len;
1.14 deraadt 729: int num;
1.1 downsj 730:
1.14 deraadt 731: /* format each number followed by its string */
1.16 millert 732: p = buf;
1.14 deraadt 733: while ((thisname = *names++) != NULL) {
734: /* get the number to format */
735: num = *numbers++;
736:
737: if (num >= 0) {
738: /* is this number in kilobytes? */
739: if (thisname[0] == 'K') {
740: /* yes: format it as a memory value */
1.16 millert 741: COPYLEFT(p, format_k(num));
1.14 deraadt 742:
743: /*
744: * skip over the K, since it was included by
745: * format_k
746: */
1.16 millert 747: COPYLEFT(p, thisname + 1);
1.14 deraadt 748: } else if (num > 0) {
1.16 millert 749: len = snprintf(p, left, "%d%s", num, thisname);
1.59 deraadt 750: if (len < 0 || len >= left)
1.16 millert 751: return;
752: p += len;
753: left -= len;
1.14 deraadt 754: }
1.16 millert 755: } else {
756: /*
757: * Ignore negative numbers, but display corresponding
758: * string.
759: */
760: COPYLEFT(p, thisname);
1.14 deraadt 761: }
1.1 downsj 762: }
763:
1.14 deraadt 764: /* if the last two characters in the string are ", ", delete them */
765: p -= 2;
1.16 millert 766: if (p >= buf && p[0] == ',' && p[1] == ' ')
1.14 deraadt 767: *p = '\0';
1.1 downsj 768: }
769:
770: /*
771: * printable(str) - make the string pointed to by "str" into one that is
772: * printable (i.e.: all ascii), by converting all non-printable
773: * characters into '?'. Replacements are done in place and a pointer
774: * to the original buffer is returned.
775: */
1.12 pvalchev 776: char *
777: printable(char *str)
1.1 downsj 778: {
1.14 deraadt 779: char *ptr, ch;
1.1 downsj 780:
1.14 deraadt 781: ptr = str;
782: while ((ch = *ptr) != '\0') {
1.46 deraadt 783: if (!isprint((unsigned char)ch))
1.14 deraadt 784: *ptr = '?';
785: ptr++;
1.1 downsj 786: }
1.14 deraadt 787: return (str);
1.25 otto 788: }
789:
790:
791: /*
792: * show_help() - display the help screen; invoked in response to
793: * either 'h' or '?'.
794: */
795: void
796: show_help(void)
797: {
798: if (smart_terminal) {
799: clear();
800: nl();
801: }
802: printwp("These single-character commands are available:\n"
803: "\n"
804: "^L - redraw screen\n"
1.39 lum 805: "<space> - update screen\n"
1.61 kn 806: "+ - reset any P highlight, g, p, or u filters\n"
1.35 jmc 807: "1 - display CPU statistics on a single line\n"
1.62 kn 808: "9 | 0 - scroll up/down the process list by one line\n"
809: "( | ) - scroll up/down the process list by screen half\n"
1.25 otto 810: "C - toggle the display of command line arguments\n"
811: "d count - show `count' displays, then exit\n"
812: "e - list errors generated by last \"kill\" or \"renice\" command\n"
1.63 kn 813: "g|/ string - filter on command name (g+ or /+ selects all commands)\n"
1.25 otto 814: "h | ? - help; show this text\n"
1.41 jsing 815: "H - toggle the display of threads\n"
1.25 otto 816: "I | i - toggle the display of idle processes\n"
1.62 kn 817: "k [-sig] pid - send signal `-sig' (TERM by default) to process `pid'\n"
1.25 otto 818: "n|# count - show `count' processes\n"
1.58 kn 819: "o [-]field - specify sort order (size, res, cpu, time, pri, pid, command)\n"
820: " (o -field sorts in reverse)\n"
1.25 otto 821: "P pid - highlight process `pid' (P+ switches highlighting off)\n"
822: "p pid - display process by `pid' (p+ selects all processes)\n"
823: "q - quit\n"
824: "r count pid - renice process `pid' to nice value `count'\n"
825: "S - toggle the display of system processes\n"
826: "s time - change delay between displays to `time' seconds\n"
1.64 ! kn 827: "T [-]rtable - show processes associated with routing table `rtable'\n"
! 828: " (T+ shows all, T -rtable hides rtable)\n"
1.43 brynet 829: "u [-]user - show processes for `user' (u+ shows all, u -user hides user)\n"
1.25 otto 830: "\n");
831:
832: if (smart_terminal) {
833: nonl();
834: refresh();
835: }
836: }
837:
838: /*
839: * show_errors() - display on stdout the current log of errors.
840: */
841: void
842: show_errors(void)
843: {
844: struct errs *errp = errs;
845: int cnt = 0;
846:
847: if (smart_terminal) {
848: clear();
849: nl();
850: }
851: printwp("%d error%s:\n\n", errcnt, errcnt == 1 ? "" : "s");
852: while (cnt++ < errcnt) {
1.38 otto 853: printwp("%5s: %s\n", errp->arg,
1.25 otto 854: errp->err == 0 ? "Not a number" : strerror(errp->err));
855: errp++;
856: }
1.38 otto 857: printwp("\n");
1.25 otto 858: if (smart_terminal) {
859: nonl();
860: refresh();
861: }
862: }
863:
864: void
865: anykey(void)
866: {
867: int ch;
1.28 deraadt 868: ssize_t len;
1.25 otto 869:
870: standoutp();
871: addstrp("Hit any key to continue: ");
872: standendp();
873: if (smart_terminal)
874: refresh();
1.52 deraadt 875: else
1.25 otto 876: fflush(stdout);
877: while (1) {
878: len = read(STDIN_FILENO, &ch, 1);
879: if (len == -1 && errno == EINTR)
880: continue;
881: if (len == 0)
882: exit(1);
883: break;
884: }
1.1 downsj 885: }
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