1 /*-
2 * Top users/processes display for Unix
3 *
4 * This program may be freely redistributed,
5 * but this entire comment MUST remain intact.
6 *
7 * Copyright (c) 1984, 1989, William LeFebvre, Rice University
8 * Copyright (c) 1989 - 1994, William LeFebvre, Northwestern University
9 * Copyright (c) 1994, 1995, William LeFebvre, Argonne National Laboratory
10 * Copyright (c) 1996, William LeFebvre, Group sys Consulting
11 */
12
13 #include <sys/types.h>
14 #include <sys/time.h>
15 #include <sys/cdefs.h>
16 #include <sys/limits.h>
17 #include <sys/resource.h>
18 #include <sys/select.h>
19 #include <sys/signal.h>
20
21 #include <assert.h>
22 #include <err.h>
23 #include <errno.h>
24 #include <getopt.h>
25 #include <jail.h>
26 #include <locale.h>
27 #include <stdbool.h>
28 #include <stdio.h>
29 #include <stdlib.h>
30 #include <signal.h>
31 #include <string.h>
32 #include <unistd.h>
33
34 #include "commands.h"
35 #include "display.h" /* interface to display package */
36 #include "screen.h" /* interface to screen package */
37 #include "top.h"
38 #include "machine.h"
39 #include "utils.h"
40 #include "username.h"
41
42 /* Size of the stdio buffer given to stdout */
43 #define Buffersize 2048
44
45 char copyright[] =
46 "Copyright (c) 1984 through 1996, William LeFebvre";
47
48 typedef void sigret_t;
49
50 /* The buffer that stdio will use */
51 static char stdoutbuf[Buffersize];
52
53 static int fmt_flags = 0;
54 int show_args = false;
55 int pcpu_stats = false;
56
57 /* signal handling routines */
58 static sigret_t leave(int);
59 static sigret_t tstop(int);
60 static sigret_t top_winch(int);
61
62 static volatile sig_atomic_t leaveflag;
63 static volatile sig_atomic_t tstopflag;
64 static volatile sig_atomic_t winchflag;
65
66 /* values which need to be accessed by signal handlers */
67 static int max_topn; /* maximum displayable processes */
68
69 /* miscellaneous things */
70 struct process_select ps;
71 pid_t mypid;
72
73 /* pointers to display routines */
74 static void (*d_loadave)(int mpid, double *avenrun) = i_loadave;
75 static void (*d_procstates)(int total, int *brkdn) = i_procstates;
76 static void (*d_cpustates)(int *states) = i_cpustates;
77 static void (*d_memory)(int *stats) = i_memory;
78 static void (*d_arc)(int *stats) = i_arc;
79 static void (*d_carc)(int *stats) = i_carc;
80 static void (*d_swap)(int *stats) = i_swap;
81 static void (*d_message)(void) = i_message;
82 static void (*d_header)(const char *text) = i_header;
83 static void (*d_process)(int line, char *thisline) = i_process;
84
85 static void reset_display(void);
86
87 static const struct option longopts[] = {
88 { "cpu-display-mode", no_argument, NULL, 'C' }, /* differs from orignal */
89 /* D reserved */
90 { "thread", no_argument, NULL, 'H' },
91 { "idle-procs", no_argument, NULL, 'I' },
92 { "jail", required_argument, NULL, 'J' },
93 { "per-cpu", no_argument, NULL, 'P' },
94 { "system-procs", no_argument, NULL, 'S' },
95 { "thread-id", no_argument, NULL, 'T' }, /* differs from orignal */
96 { "user", required_argument, NULL, 'U' },
97 { "all", no_argument, NULL, 'a' },
98 { "batch", no_argument, NULL, 'b' },
99 /* c reserved */
100 { "displays", required_argument, NULL, 'd' },
101 { "interactive", no_argument, NULL, 'i' },
102 { "jail-id", no_argument, NULL, 'j' },
103 { "display-mode", required_argument, NULL, 'm' },
104 /* n is identical to batch */
105 { "sort-order", required_argument, NULL, 'o' },
106 { "pid", required_argument, NULL, 'p' },
107 { "quick", no_argument, NULL, 'q' },
108 { "delay", required_argument, NULL, 's' },
109 { "threads", no_argument, NULL, 't' },
110 { "uids", no_argument, NULL, 'u' },
111 { "version", no_argument, NULL, 'v' },
112 { "swap", no_argument, NULL, 'w' },
113 { "system-idle-procs", no_argument, NULL, 'z' },
114 { NULL, 0, NULL, 0 }
115 };
116
117 static void
reset_uids(void)118 reset_uids(void)
119 {
120 for (size_t i = 0; i < TOP_MAX_UIDS; ++i)
121 ps.uid[i] = -1;
122 }
123
124 static int
add_uid(int uid)125 add_uid(int uid)
126 {
127 size_t i = 0;
128
129 /* Add the uid if there's room */
130 for (; i < TOP_MAX_UIDS; ++i)
131 {
132 if (ps.uid[i] == -1 || ps.uid[i] == uid)
133 {
134 ps.uid[i] = uid;
135 break;
136 }
137 }
138
139 return (i == TOP_MAX_UIDS);
140 }
141
142 static void
rem_uid(int uid)143 rem_uid(int uid)
144 {
145 size_t i = 0;
146 size_t where = TOP_MAX_UIDS;
147
148 /* Look for the user to remove - no problem if it's not there */
149 for (; i < TOP_MAX_UIDS; ++i)
150 {
151 if (ps.uid[i] == -1)
152 break;
153 if (ps.uid[i] == uid)
154 where = i;
155 }
156
157 /* Make sure we don't leave a hole in the middle */
158 if (where != TOP_MAX_UIDS)
159 {
160 ps.uid[where] = ps.uid[i-1];
161 ps.uid[i-1] = -1;
162 }
163 }
164
165 static int
handle_user(char * buf,size_t buflen)166 handle_user(char *buf, size_t buflen)
167 {
168 int rc = 0;
169 int uid = -1;
170 char *buf2 = buf;
171
172 new_message(MT_standout, "Username to show (+ for all): ");
173 if (readline(buf, buflen, false) <= 0)
174 {
175 clear_message();
176 return (rc);
177 }
178
179 if (buf[0] == '+' || buf[0] == '-')
180 {
181 if (buf[1] == '\0')
182 {
183 reset_uids();
184 goto end;
185 }
186 else
187 ++buf2;
188 }
189
190 if ((uid = userid(buf2)) == -1)
191 {
192 new_message(MT_standout, " %s: unknown user", buf2);
193 rc = 1;
194 goto end;
195 }
196
197 if (buf2 == buf)
198 {
199 reset_uids();
200 ps.uid[0] = uid;
201 goto end;
202 }
203
204 if (buf[0] == '+')
205 {
206 if (add_uid(uid))
207 {
208 new_message(MT_standout, " too many users, reset with '+'");
209 rc = 1;
210 goto end;
211 }
212 }
213 else
214 rem_uid(uid);
215
216 end:
217 putchar('\r');
218 return (rc);
219 }
220
221 int
main(int argc,const char * argv[])222 main(int argc, const char *argv[])
223 {
224 int i;
225 int active_procs;
226
227 struct system_info system_info;
228 struct statics statics;
229 void * processes;
230
231 static char tempbuf1[50];
232 static char tempbuf2[50];
233 sigset_t old_sigmask, new_sigmask;
234 int topn = Infinity;
235 struct timeval delay = { 2, 0 };
236 int displays = 0; /* indicates unspecified */
237 int sel_ret = 0;
238 time_t curr_time;
239 char *(*get_userid)(int) = username;
240 const char *uname_field = "USERNAME";
241 const char *header_text;
242 char *env_top;
243 const char **preset_argv;
244 int preset_argc = 0;
245 const char **av = NULL;
246 int ac = -1;
247 bool do_unames = true;
248 char interactive = 2;
249 char warnings = 0;
250 char topn_specified = false;
251 char ch;
252 char no_command = 1;
253 struct timeval timeout;
254 char *order_name = NULL;
255 const struct sort_info *sort_info = NULL;
256 fd_set readfds;
257 char *nptr;
258
259 /* set the buffer for stdout */
260 #ifdef DEBUG
261 extern FILE *debug;
262 debug = fopen("debug.run", "w");
263 setbuffer(stdout, NULL, 0);
264 #else
265 setbuffer(stdout, stdoutbuf, Buffersize);
266 #endif
267
268 if (setlocale(LC_ALL, "") == NULL) {
269 warnx("invalid locale, check your environment");
270 sleep(2);
271 }
272
273 mypid = getpid();
274
275 /* get our name */
276 /* initialize some selection options */
277 ps.idle = true;
278 ps.self = true;
279 ps.system = false;
280 reset_uids();
281 ps.thread = false;
282 ps.wcpu = 1;
283 ps.jid = -1;
284 ps.jail = false;
285 ps.swap = false;
286 ps.kidle = true;
287 ps.pid = -1;
288 ps.command = NULL;
289 ps.thread_id = false;
290
291 /* get preset options from the environment */
292 if ((env_top = getenv("TOP")) != NULL)
293 {
294 av = preset_argv = argparse(env_top, &preset_argc);
295 ac = preset_argc;
296
297 /* set the dummy argument to an explanatory message, in case
298 getopt encounters a bad argument */
299 preset_argv[0] = "while processing environment";
300 }
301
302 /* process options */
303 do {
304 /* if we're done doing the presets, then process the real arguments */
305 if (preset_argc == 0)
306 {
307 ac = argc;
308 av = argv;
309
310 /* this should keep getopt happy... */
311 optind = 1;
312 }
313
314 while ((i = getopt_long(ac, __DECONST(char * const *, av), "CSIHPabijJ:nquvzs:d:U:m:o:p:Ttw", longopts, NULL)) != EOF)
315 {
316 switch(i)
317 {
318 case 'v': /* show version number */
319 errx(0, "version FreeBSD");
320 break;
321
322 case 'u': /* toggle uid/username display */
323 do_unames = !do_unames;
324 break;
325
326 case 'U': /* display only username's processes */
327 if ((ps.uid[0] = userid(optarg)) == -1)
328 {
329 errx(1, "%s: unknown user\n", optarg);
330 }
331 break;
332
333 case 'S': /* show system processes */
334 ps.system = true;
335 break;
336
337 case 'I': /* show idle processes */
338 ps.idle = !ps.idle;
339 break;
340
341 case 'i': /* go interactive regardless */
342 interactive = 1;
343 break;
344
345 case 'n': /* batch, or non-interactive */
346 case 'b':
347 interactive = 0;
348 break;
349
350 case 'a':
351 fmt_flags ^= FMT_SHOWARGS;
352 break;
353
354 case 'd': /* number of displays to show */
355 if ((i = atoiwi(optarg)) == Invalid || i == 0)
356 {
357 warnx("warning: display count should be positive -- option ignored");
358 warnings++;
359 }
360 else
361 {
362 displays = i;
363 }
364 break;
365 case 'p': {
366 unsigned long long num;
367 const char *errstr;
368
369 num = strtonum(optarg, 0, INT_MAX, &errstr);
370 if (errstr != NULL || !find_pid(num)) {
371 fprintf(stderr, "%s: unknown pid\n", optarg);
372 exit(1);
373 }
374 ps.pid = (pid_t)num;
375 ps.system = true;
376 break;
377 }
378
379 case 's':
380 {
381 double delay_d = strtod(optarg, &nptr);
382 if (nptr == optarg)
383 {
384 warnx("warning: invalid delay");
385 warnings++;
386 }
387 else if (delay_d <= 0)
388 {
389 warnx("warning: seconds delay should be positive -- using default");
390 warnings++;
391 }
392 else
393 {
394 delay.tv_sec = delay_d;
395 delay.tv_usec = (delay_d - delay.tv_sec) * 1e6;
396 }
397 break;
398 }
399
400 case 'q': /* be quick about it */
401 errno = 0;
402 i = setpriority(PRIO_PROCESS, 0, PRIO_MIN);
403 if (i == -1 && errno != 0) {
404 warnx("warning: `-q' option failed (%m)");
405 warnings++;
406 }
407 break;
408
409 case 'm': /* select display mode */
410 if (strcmp(optarg, "io") == 0) {
411 displaymode = DISP_IO;
412 } else if (strcmp(optarg, "cpu") == 0) {
413 displaymode = DISP_CPU;
414 } else {
415 errx(1, "warning: `-m' option can only take args 'io' or 'cpu'");
416 }
417 break;
418
419 case 'o': /* select sort order */
420 order_name = optarg;
421 break;
422
423 case 't':
424 ps.self = !ps.self;
425 break;
426
427 case 'C':
428 ps.wcpu = !ps.wcpu;
429 break;
430
431 case 'H':
432 ps.thread = !ps.thread;
433 break;
434
435 case 'T':
436 ps.thread_id = !ps.thread_id;
437 break;
438
439 case 'j':
440 ps.jail = !ps.jail;
441 break;
442
443 case 'J': /* display only jail's processes */
444 if ((ps.jid = jail_getid(optarg)) == -1)
445 {
446 fprintf(stderr, "%s: unknown jail\n", optarg);
447 exit(1);
448 }
449 ps.jail = 1;
450 break;
451
452 case 'P':
453 pcpu_stats = !pcpu_stats;
454 break;
455
456 case 'w':
457 ps.swap = 1;
458 break;
459
460 case 'z':
461 ps.kidle = !ps.kidle;
462 break;
463
464 default:
465 errx(1,
466 "[-abCHIijnPqSTtuvwz] [-d count] [-J jail] [-m cpu | io] [-o field]\n"
467 " [-p pid] [-s time] [-U username] [number]");
468 }
469 }
470
471 /* get count of top processes to display (if any) */
472 if (optind < ac)
473 {
474 if ((topn = atoiwi(av[optind])) == Invalid)
475 {
476 warnx("warning: process display count should be non-negative -- using default");
477 warnings++;
478 }
479 else
480 {
481 topn_specified = true;
482 }
483 }
484
485 /* tricky: remember old value of preset_argc & set preset_argc = 0 */
486 i = preset_argc;
487 preset_argc = 0;
488
489 /* repeat only if we really did the preset arguments */
490 } while (i != 0);
491
492 /* set constants for username/uid display correctly */
493 if (!do_unames)
494 {
495 uname_field = " UID ";
496 get_userid = itoa7;
497 }
498
499 /* initialize the kernel memory interface */
500 if (machine_init(&statics) == -1)
501 {
502 exit(1);
503 }
504
505 /* determine sorting order index, if necessary */
506 if (order_name != NULL)
507 {
508 if ((sort_info = get_sort_info(order_name)) == NULL) {
509 warnx("'%s' is not a recognized sorting order.", order_name);
510 fprintf(stderr, "\tTry one of these:");
511 dump_sort_names(stderr);
512 fputc('\n', stderr);
513 exit(1);
514 }
515 }
516 else
517 {
518 sort_info = get_sort_info(NULL);
519 }
520
521 /* initialize termcap */
522 init_termcap(interactive);
523
524 /* get the string to use for the process area header */
525 header_text = format_header(uname_field);
526
527 /* initialize display interface */
528 if ((max_topn = display_init(&statics)) == -1)
529 {
530 errx(4, "can't allocate sufficient memory");
531 }
532
533 /* print warning if user requested more processes than we can display */
534 if (topn > max_topn)
535 {
536 warnx("warning: this terminal can only display %d processes.", max_topn);
537 warnings++;
538 }
539
540 /* adjust for topn == Infinity */
541 if (topn == Infinity)
542 {
543 /*
544 * For smart terminals, infinity really means everything that can
545 * be displayed, or Largest.
546 * On dumb terminals, infinity means every process in the system!
547 * We only really want to do that if it was explicitly specified.
548 * This is always the case when "Default_TOPN != Infinity". But if
549 * topn wasn't explicitly specified and we are on a dumb terminal
550 * and the default is Infinity, then (and only then) we use
551 * "Nominal_TOPN" instead.
552 */
553 topn = smart_terminal ? Largest :
554 (topn_specified ? Largest : Nominal_TOPN);
555 }
556
557 /* set header display accordingly */
558 display_header(topn > 0);
559
560 /* determine interactive state */
561 if (interactive == 2)
562 {
563 interactive = smart_terminal;
564 }
565
566 /* if # of displays not specified, fill it in */
567 if (displays == 0)
568 {
569 displays = smart_terminal ? Infinity : 1;
570 }
571
572 /* hold interrupt signals while setting up the screen and the handlers */
573
574 sigemptyset(&new_sigmask);
575 sigaddset(&new_sigmask, SIGINT);
576 sigaddset(&new_sigmask, SIGQUIT);
577 sigaddset(&new_sigmask, SIGTSTP);
578 sigprocmask(SIG_BLOCK, &new_sigmask, &old_sigmask);
579 init_screen();
580 signal(SIGINT, leave);
581 signal(SIGQUIT, leave);
582 signal(SIGTSTP, tstop);
583 signal(SIGWINCH, top_winch);
584 sigprocmask(SIG_SETMASK, &old_sigmask, NULL);
585 if (warnings)
586 {
587 fputs("....", stderr);
588 fflush(stderr);
589 sleep(3 * warnings);
590 fputc('\n', stderr);
591 }
592
593 restart:
594
595 /*
596 * main loop -- repeat while display count is positive or while it
597 * indicates infinity (by being -1)
598 */
599
600 while ((displays == -1) || (displays-- > 0))
601 {
602
603 /* get the current stats */
604 get_system_info(&system_info);
605
606 /* get the current set of processes */
607 processes =
608 get_process_info(&system_info, &ps, sort_info);
609
610 /* display the load averages */
611 (*d_loadave)(system_info.last_pid,
612 system_info.load_avg);
613
614 /* display the battery info (if any) */
615 i_battery(statics.nbatteries, system_info.battery);
616
617 /* display the current time */
618 /* this method of getting the time SHOULD be fairly portable */
619 time(&curr_time);
620 i_uptime(&system_info.boottime, &curr_time);
621 i_timeofday(&curr_time);
622
623 /* display process state breakdown */
624 (*d_procstates)(system_info.p_total,
625 system_info.procstates);
626 (*d_cpustates)(system_info.cpustates);
627
628 /* display memory stats */
629 (*d_memory)(system_info.memory);
630 (*d_arc)(system_info.arc);
631 (*d_carc)(system_info.carc);
632
633 /* display swap stats */
634 (*d_swap)(system_info.swap);
635
636 /* handle message area */
637 (*d_message)();
638
639 /* update the header area */
640 (*d_header)(header_text);
641
642 if (topn > 0)
643 {
644 /* determine number of processes to actually display */
645 /* this number will be the smallest of: active processes,
646 number user requested, number current screen accommodates */
647 active_procs = system_info.p_pactive;
648 if (active_procs > topn)
649 {
650 active_procs = topn;
651 }
652 if (active_procs > max_topn)
653 {
654 active_procs = max_topn;
655 }
656
657 /* now show the top "n" processes. */
658 for (i = 0; i < active_procs; i++)
659 {
660 (*d_process)(i, format_next_process(processes, get_userid,
661 fmt_flags));
662 }
663 }
664 else
665 {
666 i = 0;
667 }
668
669 /* do end-screen processing */
670 u_endscreen(i);
671
672 /* now, flush the output buffer */
673 if (fflush(stdout) != 0)
674 {
675 new_message(MT_standout, " Write error on stdout");
676 putchar('\r');
677 quit(1);
678 }
679
680 /* only do the rest if we have more displays to show */
681 if (displays)
682 {
683 /* switch out for new display on smart terminals */
684 if (smart_terminal)
685 {
686 if (overstrike)
687 {
688 reset_display();
689 }
690 else
691 {
692 d_loadave = u_loadave;
693 d_procstates = u_procstates;
694 d_cpustates = u_cpustates;
695 d_memory = u_memory;
696 d_arc = u_arc;
697 d_carc = u_carc;
698 d_swap = u_swap;
699 d_message = u_message;
700 d_header = u_header;
701 d_process = u_process;
702 }
703 }
704
705 no_command = true;
706 if (!interactive)
707 {
708 timeout = delay;
709 select(0, NULL, NULL, NULL, &timeout);
710 if (leaveflag) {
711 end_screen();
712 exit(0);
713 }
714 }
715 else while (no_command)
716 {
717 /* assume valid command unless told otherwise */
718 no_command = false;
719
720 /* set up arguments for select with timeout */
721 FD_ZERO(&readfds);
722 FD_SET(0, &readfds); /* for standard input */
723 timeout = delay;
724
725 if (leaveflag) {
726 end_screen();
727 exit(0);
728 }
729
730 if (tstopflag) {
731 /* move to the lower left */
732 end_screen();
733 fflush(stdout);
734
735 /* default the signal handler action */
736 signal(SIGTSTP, SIG_DFL);
737
738 /* unblock the signal and send ourselves one */
739 sigsetmask(sigblock(0) & ~(1 << (SIGTSTP - 1)));
740 kill(0, SIGTSTP);
741
742 /* reset the signal handler */
743 signal(SIGTSTP, tstop);
744
745 /* reinit screen */
746 reinit_screen();
747 reset_display();
748 tstopflag = 0;
749 goto restart;
750 }
751
752 if (winchflag) {
753 /* reascertain the screen dimensions */
754 get_screensize();
755
756 /* tell display to resize */
757 max_topn = display_resize();
758
759 /* reset the signal handler */
760 signal(SIGWINCH, top_winch);
761
762 reset_display();
763 winchflag = 0;
764 goto restart;
765 }
766
767 /* wait for either input or the end of the delay period */
768 sel_ret = select(2, &readfds, NULL, NULL, &timeout);
769 if (sel_ret < 0 && errno != EINTR)
770 quit(0);
771 if (sel_ret > 0)
772 {
773 int newval;
774 const char *errmsg;
775 const struct command *cptr;
776
777 /* something to read -- clear the message area first */
778 clear_message();
779
780 /* now read it and convert to command strchr */
781 /* (use "change" as a temporary to hold strchr) */
782 if (read(0, &ch, 1) != 1)
783 {
784 /* read error: either 0 or -1 */
785 new_message(MT_standout, " Read error on stdin");
786 putchar('\r');
787 quit(1);
788 }
789 if (ch == '\r' || ch == '\n') {
790 continue;
791 }
792 cptr = all_commands;
793 while (cptr->c != '\0') {
794 if (cptr->c == ch) {
795 break;
796 }
797 cptr++;
798 }
799 if (cptr->c == '\0') {
800 new_message(MT_standout, " Command not understood");
801 putchar('\r');
802 no_command = true;
803 }
804 if (overstrike && !cptr->available_to_dumb)
805 {
806 new_message(MT_standout,
807 " Command cannot be handled by this terminal");
808 putchar('\r');
809 no_command = true;
810 }
811 if (!no_command) {
812 switch(cptr->id)
813 {
814 case CMD_redraw: /* redraw screen */
815 reset_display();
816 break;
817
818 case CMD_update: /* merely update display */
819 break;
820
821 case CMD_quit:
822 quit(0);
823 break;
824
825 case CMD_help:
826 reset_display();
827 top_clear();
828 show_help();
829 top_standout("Hit any key to continue: ");
830 fflush(stdout);
831 read(0, &ch, 1);
832 break;
833
834 case CMD_errors: /* show errors */
835 if (error_count() == 0)
836 {
837 new_message(MT_standout,
838 " Currently no errors to report.");
839 putchar('\r');
840 no_command = true;
841 }
842 else
843 {
844 reset_display();
845 top_clear();
846 show_errors();
847 top_standout("Hit any key to continue: ");
848 fflush(stdout);
849 read(0, &ch, 1);
850 }
851 break;
852
853 case CMD_number:
854 new_message(MT_standout,
855 "Number of processes to show: ");
856 newval = readline(tempbuf1, 8, true);
857 if (newval > -1)
858 {
859 if (newval > max_topn)
860 {
861 new_message(MT_standout | MT_delayed,
862 " This terminal can only display %d processes.",
863 max_topn);
864 putchar('\r');
865 }
866
867 if (newval == 0)
868 {
869 /* inhibit the header */
870 display_header(false);
871 }
872 else if (newval > topn && topn == 0)
873 {
874 /* redraw the header */
875 display_header(true);
876 d_header = i_header;
877 }
878 topn = newval;
879 }
880 break;
881
882 case CMD_delay: /* new seconds delay */
883 new_message(MT_standout, "Seconds to delay: ");
884 if ((i = readline(tempbuf1, 8, false)) > 0)
885 {
886 double delay_d = strtod(tempbuf1, &nptr);
887 if (nptr == tempbuf1 || delay_d <= 0)
888 {
889 new_message(MT_standout, " Invalid delay");
890 putchar('\r');
891 no_command = true;
892 }
893 else
894 {
895 delay.tv_sec = delay_d;
896 delay.tv_usec = (delay_d - delay.tv_sec) * 1e6;
897 clear_message();
898 }
899 }
900 break;
901
902 case CMD_grep: /* grep command name */
903 new_message(MT_standout,
904 "Grep command name (+ for all): ");
905 if (readline(tempbuf1, sizeof(tempbuf1), false) > 0) {
906 free(ps.command);
907 if (tempbuf1[0] == '+' && tempbuf1[1] == '\0') {
908 ps.command = NULL;
909 } else if ((ps.command = strdup(tempbuf1)) == NULL)
910 quit(1);
911 }
912 clear_message();
913 break;
914
915 case CMD_displays: /* change display count */
916 new_message(MT_standout,
917 "Displays to show (currently %s): ",
918 displays == -1 ? "infinite" :
919 itoa(displays));
920 if ((i = readline(tempbuf1, 10, true)) > 0)
921 {
922 displays = i;
923 }
924 else if (i == 0)
925 {
926 quit(0);
927 }
928 clear_message();
929 break;
930
931 case CMD_kill: /* kill program */
932 new_message(0, "kill ");
933 if (readline(tempbuf2, sizeof(tempbuf2), false) > 0)
934 {
935 if ((errmsg = kill_procs(tempbuf2)) != NULL)
936 {
937 new_message(MT_standout, "%s", errmsg);
938 putchar('\r');
939 no_command = true;
940 }
941 }
942 else
943 {
944 clear_message();
945 }
946 break;
947
948 case CMD_renice: /* renice program */
949 new_message(0, "renice ");
950 if (readline(tempbuf2, sizeof(tempbuf2), false) > 0)
951 {
952 if ((errmsg = renice_procs(tempbuf2)) != NULL)
953 {
954 new_message(MT_standout, "%s", errmsg);
955 putchar('\r');
956 no_command = true;
957 }
958 }
959 else
960 {
961 clear_message();
962 }
963 break;
964
965 case CMD_idletog:
966 ps.idle = !ps.idle;
967 new_message(MT_standout | MT_delayed,
968 " %sisplaying idle processes.",
969 ps.idle ? "D" : "Not d");
970 putchar('\r');
971 break;
972
973 case CMD_selftog:
974 ps.self = !ps.self;
975 new_message(MT_standout | MT_delayed,
976 " %sisplaying self.",
977 (ps.self) ? "D" : "Not d");
978 putchar('\r');
979 break;
980
981 case CMD_user:
982 if (handle_user(tempbuf2, sizeof(tempbuf2)))
983 no_command = true;
984 break;
985
986 case CMD_thrtog:
987 ps.thread = !ps.thread;
988 new_message(MT_standout | MT_delayed,
989 " Displaying threads %s",
990 ps.thread ? "separately" : "as a count");
991 header_text = format_header(uname_field);
992 reset_display();
993 putchar('\r');
994 break;
995
996 case CMD_toggletid:
997 ps.thread_id = !ps.thread_id;
998 new_message(MT_standout | MT_delayed,
999 " Displaying %s",
1000 ps.thread_id ? "tid" : "pid");
1001 header_text = format_header(uname_field);
1002 reset_display();
1003 putchar('\r');
1004 break;
1005
1006 case CMD_wcputog:
1007 ps.wcpu = !ps.wcpu;
1008 new_message(MT_standout | MT_delayed,
1009 " Displaying %s CPU",
1010 ps.wcpu ? "weighted" : "raw");
1011 header_text = format_header(uname_field);
1012 reset_display();
1013 putchar('\r');
1014 break;
1015 case CMD_viewtog:
1016 displaymode = displaymode == DISP_IO ? DISP_CPU : DISP_IO;
1017 new_message(MT_standout | MT_delayed,
1018 " Displaying %s statistics.",
1019 displaymode == DISP_IO ? "IO" : "CPU");
1020 header_text = format_header(uname_field);
1021 display_header(true);
1022 d_header = i_header;
1023 reset_display();
1024 break;
1025 case CMD_viewsys:
1026 ps.system = !ps.system;
1027 new_message(MT_standout | MT_delayed,
1028 " %sisplaying system processes.",
1029 ps.system ? "D" : "Not d");
1030 break;
1031 case CMD_showargs:
1032 fmt_flags ^= FMT_SHOWARGS;
1033 show_args = fmt_flags & FMT_SHOWARGS;
1034 new_message(MT_standout | MT_delayed,
1035 " %sisplaying process arguments.",
1036 fmt_flags & FMT_SHOWARGS ? "D" : "Not d");
1037 break;
1038 case CMD_order:
1039 new_message(MT_standout,
1040 "Order to sort: ");
1041 if (readline(tempbuf2, sizeof(tempbuf2), false) > 0)
1042 {
1043 const struct sort_info *new_sort_info;
1044
1045 if ((new_sort_info = get_sort_info(tempbuf2)) == NULL)
1046 {
1047 new_message(MT_standout,
1048 " %s: unrecognized sorting order", tempbuf2);
1049 no_command = true;
1050 }
1051 else
1052 {
1053 sort_info = new_sort_info;
1054 }
1055 putchar('\r');
1056 }
1057 else
1058 {
1059 clear_message();
1060 }
1061 break;
1062 case CMD_jidtog:
1063 ps.jail = !ps.jail;
1064 new_message(MT_standout | MT_delayed,
1065 " %sisplaying jail ID.",
1066 ps.jail ? "D" : "Not d");
1067 header_text = format_header(uname_field);
1068 reset_display();
1069 putchar('\r');
1070 break;
1071
1072 case CMD_jail:
1073 new_message(MT_standout,
1074 "Jail to show (+ for all): ");
1075 if (readline(tempbuf2, sizeof(tempbuf2), false) > 0)
1076 {
1077 if (tempbuf2[0] == '+' &&
1078 tempbuf2[1] == '\0')
1079 {
1080 ps.jid = -1;
1081 }
1082 else if ((i = jail_getid(tempbuf2)) == -1)
1083 {
1084 new_message(MT_standout,
1085 " %s: unknown jail", tempbuf2);
1086 no_command = true;
1087 }
1088 else
1089 {
1090 ps.jid = i;
1091 }
1092 if (ps.jail == 0) {
1093 ps.jail = 1;
1094 new_message(MT_standout |
1095 MT_delayed, " Displaying jail "
1096 "ID.");
1097 header_text =
1098 format_header(uname_field);
1099 reset_display();
1100 }
1101 putchar('\r');
1102 }
1103 else
1104 {
1105 clear_message();
1106 }
1107 break;
1108
1109 case CMD_kidletog:
1110 ps.kidle = !ps.kidle;
1111 new_message(MT_standout | MT_delayed,
1112 " %sisplaying system idle process.",
1113 ps.kidle ? "D" : "Not d");
1114 putchar('\r');
1115 break;
1116 case CMD_pcputog:
1117 pcpu_stats = !pcpu_stats;
1118 new_message(MT_standout | MT_delayed,
1119 " Displaying %sCPU statistics.",
1120 pcpu_stats ? "per-" : "global ");
1121 toggle_pcpustats();
1122 max_topn = display_updatecpus(&statics);
1123 reset_display();
1124 putchar('\r');
1125 break;
1126 case CMD_swaptog:
1127 ps.swap = !ps.swap;
1128 new_message(MT_standout | MT_delayed,
1129 " %sisplaying per-process swap usage.",
1130 ps.swap ? "D" : "Not d");
1131 header_text = format_header(uname_field);
1132 reset_display();
1133 putchar('\r');
1134 break;
1135 case CMD_pid:
1136 new_message(MT_standout,
1137 "Process id to show (+ for all): ");
1138 if (readline(tempbuf2, sizeof(tempbuf2), false) > 0) {
1139 if (tempbuf2[0] == '+' &&
1140 tempbuf2[1] == '\0') {
1141 ps.pid = (pid_t)-1;
1142 } else {
1143 unsigned long long num;
1144 const char *errstr;
1145
1146 num = strtonum(tempbuf2, 0, INT_MAX,
1147 &errstr);
1148 if (errstr != NULL || !find_pid(num)) {
1149 new_message(MT_standout,
1150 " %s: unknown pid",
1151 tempbuf2);
1152 no_command = true;
1153 } else {
1154 ps.pid = (pid_t)num;
1155 }
1156 }
1157 putchar('\r');
1158 } else
1159 clear_message();
1160 break;
1161 case CMD_NONE:
1162 assert(false && "reached switch without command");
1163 }
1164 }
1165 }
1166
1167 /* flush out stuff that may have been written */
1168 fflush(stdout);
1169 }
1170 }
1171 }
1172
1173 #ifdef DEBUG
1174 fclose(debug);
1175 #endif
1176 quit(0);
1177 }
1178
1179 /*
1180 * reset_display() - reset all the display routine pointers so that entire
1181 * screen will get redrawn.
1182 */
1183
1184 static void
reset_display(void)1185 reset_display(void)
1186 {
1187 d_loadave = i_loadave;
1188 d_procstates = i_procstates;
1189 d_cpustates = i_cpustates;
1190 d_memory = i_memory;
1191 d_arc = i_arc;
1192 d_carc = i_carc;
1193 d_swap = i_swap;
1194 d_message = i_message;
1195 d_header = i_header;
1196 d_process = i_process;
1197 }
1198
1199 /*
1200 * signal handlers
1201 */
1202
1203 static sigret_t
leave(int i __unused)1204 leave(int i __unused) /* exit under normal conditions -- INT handler */
1205 {
1206
1207 leaveflag = 1;
1208 }
1209
1210 static sigret_t
tstop(int i __unused)1211 tstop(int i __unused) /* SIGTSTP handler */
1212 {
1213
1214 tstopflag = 1;
1215 }
1216
1217 static sigret_t
top_winch(int i __unused)1218 top_winch(int i __unused) /* SIGWINCH handler */
1219 {
1220
1221 winchflag = 1;
1222 }
1223
1224 void __dead2
quit(int status)1225 quit(int status) /* exit under duress */
1226 {
1227 end_screen();
1228 exit(status);
1229 }
1230