1 /*
2 * Copyright (c) 1984 through 2008, William LeFebvre
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are met:
7 *
8 * * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 *
11 * * Redistributions in binary form must reproduce the above
12 * copyright notice, this list of conditions and the following disclaimer
13 * in the documentation and/or other materials provided with the
14 * distribution.
15 *
16 * * Neither the name of William LeFebvre nor the names of other
17 * contributors may be used to endorse or promote products derived from
18 * this software without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
23 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
24 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
25 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
26 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
30 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 */
32
33 /*
34 * Top users/processes display for Unix
35 * Version 3
36 */
37
38 /*
39 * This file contains the routines that implement some of the interactive
40 * mode commands. Note that some of the commands are implemented in-line
41 * in "main". This is necessary because they change the global state of
42 * "top" (i.e.: changing the number of processes to display).
43 */
44
45 #include "os.h"
46 #include <ctype.h>
47 #include <signal.h>
48 #include <stdarg.h>
49 #include <unistd.h>
50 #include <color.h>
51 #include <errno.h>
52 #ifdef HAVE_SYS_RESOURCE_H
53 #include <sys/resource.h>
54 #endif
55
56 #if defined(HAVE_DECL_SYS_SIGLIST) & defined(HAVE_STRCASECMP)
57 #define USE_SYS_SIGLIST
58 #endif
59
60 #ifdef USE_SYS_SIGLIST
61 extern const char * const sys_siglist[];
62 extern const char * const sys_signame[];
63 #else
64 #include "sigdesc.h" /* generated automatically */
65 #endif
66 #include "top.h"
67 #include "machine.h"
68 #include "globalstate.h"
69 #include "boolean.h"
70 #include "color.h"
71 #include "commands.h"
72 #include "display.h"
73 #include "screen.h"
74 #include "username.h"
75 #include "utils.h"
76 #include "version.h"
77
78 extern char *copyright;
79
80 typedef struct command {
81 int ch;
82 int (*cmd_func)(globalstate *);
83 const char *help;
84 } command;
85
86 /*
87 * Some of the commands make system calls that could generate errors.
88 * These errors are collected up in an array of structures for later
89 * contemplation and display. Such routines return a string containing an
90 * error message, or NULL if no errors occurred. We need an upper limit on
91 * the number of errors, so we arbitrarily choose 20.
92 */
93
94 #define ERRMAX 20
95
96 struct errs /* structure for a system-call error */
97 {
98 int errnum; /* value of errno (that is, the actual error) */
99 char *arg; /* argument that caused the error */
100 };
101
102 static struct errs errs[ERRMAX];
103 static int errcnt;
104
105 /* These macros get used to reset and log the errors */
106 #define ERR_RESET errcnt = 0
107 #define ERROR(p, e) if (errcnt < ERRMAX) \
108 { \
109 errs[errcnt].arg = (p); \
110 errs[errcnt++].errnum = (e); \
111 }
112
113 /*
114 * err_compar(p1, p2) - comparison routine used by "qsort"
115 * for sorting errors.
116 */
117
118 static int
err_compar(const void * p1,const void * p2)119 err_compar(const void *p1, const void *p2)
120
121 {
122 register int result;
123
124 if ((result = ((const struct errs *)p1)->errnum -
125 ((const struct errs *)p2)->errnum) == 0)
126 {
127 return(strcmp(((const struct errs *)p1)->arg,
128 ((const struct errs *)p2)->arg));
129 }
130 return(result);
131 }
132
133 /*
134 * str_adderr(str, len, err) - add an explanation of error "err" to
135 * the string "str" without overflowing length "len". return
136 * number of characters remaining in str, or 0 if overflowed.
137 */
138
139 static int
str_adderr(char * str,int len,int err)140 str_adderr(char *str, int len, int err)
141
142 {
143 register const char *msg;
144 register int msglen;
145
146 msg = err == 0 ? "Not a number" : errmsg(err);
147 msglen = strlen(msg) + 2;
148 if (len <= msglen)
149 {
150 return(0);
151 }
152 (void) strcat(str, ": ");
153 (void) strcat(str, msg);
154 return(len - msglen);
155 }
156
157 /*
158 * str_addarg(str, len, arg, first) - add the string argument "arg" to
159 * the string "str" without overflowing length "len". This is the
160 * first in the group when "first" is set (indicating that a comma
161 * should NOT be added to the front). Return number of characters
162 * remaining in str, or 0 if overflowed.
163 */
164
165 static int
str_addarg(char * str,int len,char * arg,int first)166 str_addarg(char *str, int len, char *arg, int first)
167
168 {
169 register int arglen;
170
171 arglen = strlen(arg);
172 if (!first)
173 {
174 arglen += 2;
175 }
176 if (len <= arglen)
177 {
178 return(0);
179 }
180 if (!first)
181 {
182 (void) strcat(str, ", ");
183 }
184 (void) strcat(str, arg);
185 return(len - arglen);
186 }
187
188 /*
189 * void err_string()
190 *
191 * Use message_error to log errors in the errs array. This function
192 * will combine identical errors to make the message short, but if
193 * there is more than one type of error it will call message_error
194 * for each one.
195 */
196
197 #define STRMAX 80
198
199 static void
err_string(void)200 err_string(void)
201
202 {
203 register struct errs *errp;
204 register int cnt = 0;
205 register int first = Yes;
206 register int currerr = -1;
207 int stringlen = 0; /* characters still available in "string" */
208 char string[STRMAX];
209
210 /* if there are no errors, our job is easy */
211 if (errcnt == 0)
212 {
213 return;
214 }
215
216 /* sort the errors */
217 qsort((char *)errs, errcnt, sizeof(struct errs), err_compar);
218
219 /* initialize the buffer (probably not necessary) */
220 string[0] = '\0';
221 stringlen = STRMAX - 1;
222
223 /* loop thru the sorted list, logging errors */
224 while (cnt < errcnt)
225 {
226 /* point to the current error */
227 errp = &(errs[cnt++]);
228
229 /* note that on overflow "stringlen" will become 0 and all
230 subsequent calls to str_addarg or str_adderr will return 0 */
231
232 /* if the error number is different then add the error string */
233 if (errp->errnum != currerr)
234 {
235 if (currerr != -1)
236 {
237 /* add error string and log the error */
238 stringlen = str_adderr(string, stringlen, currerr);
239 message_error(" %s", string);
240
241 }
242 /* reset the buffer */
243 string[0] = '\0';
244 stringlen = STRMAX - 1;
245
246 /* move to next error num */
247 currerr = errp->errnum;
248 first = Yes;
249 }
250
251 /* add this arg */
252 stringlen = str_addarg(string, stringlen, errp->arg, first);
253 first = No;
254 }
255
256 /* add final message */
257 stringlen = str_adderr(string, stringlen, currerr);
258
259 /* write the error string */
260 message_error(" %s", string);
261 }
262
263 /*
264 * Utility routines that help with some of the commands.
265 */
266
267 static char *
next_field(char * str)268 next_field(char *str)
269
270
271 {
272 if ((str = strchr(str, ' ')) == NULL)
273 {
274 return(NULL);
275 }
276 *str = '\0';
277 while (*++str == ' ') /* loop */;
278
279 /* if there is nothing left of the string, return NULL */
280 /* This fix is dedicated to Greg Earle */
281 return(*str == '\0' ? NULL : str);
282 }
283
284 static int
scanint(char * str,int * intp)285 scanint(char *str, int *intp)
286
287 {
288 register int val = 0;
289 register int ch;
290
291 /* if there is nothing left of the string, flag it as an error */
292 /* This fix is dedicated to Greg Earle */
293 if (*str == '\0')
294 {
295 return(-1);
296 }
297
298 while ((ch = *str++) != '\0')
299 {
300 if (isdigit(ch))
301 {
302 val = val * 10 + (ch - '0');
303 }
304 else if (isspace(ch))
305 {
306 break;
307 }
308 else
309 {
310 return(-1);
311 }
312 }
313 *intp = val;
314 return(0);
315 }
316
317 #ifdef notdef
318 /*
319 * error_count() - return the number of errors currently logged.
320 */
321
322 static int
error_count(void)323 error_count(void)
324
325 {
326 return(errcnt);
327 }
328
329 /*
330 * show_errors() - display on stdout the current log of errors.
331 */
332
333 static void
show_errors(void)334 show_errors(void)
335
336 {
337 register int cnt = 0;
338 register struct errs *errp = errs;
339
340 printf("%d error%s:\n\n", errcnt, errcnt == 1 ? "" : "s");
341 while (cnt++ < errcnt)
342 {
343 printf("%5s: %s\n", errp->arg,
344 errp->errnum == 0 ? "Not a number" : errmsg(errp->errnum));
345 errp++;
346 }
347 }
348 #endif
349
350 /*
351 * kill_procs(str) - send signals to processes, much like the "kill"
352 * command does; invoked in response to 'k'.
353 */
354
355 static void
kill_procs(char * str)356 kill_procs(char *str)
357
358 {
359 register char *nptr;
360 int signum = SIGTERM; /* default */
361 int procnum;
362 int uid;
363 int owner;
364 #ifndef USE_SYS_SIGLIST
365 struct sigdesc *sigp;
366 #endif
367
368 /* reset error array */
369 ERR_RESET;
370
371 /* remember our uid */
372 uid = getuid();
373
374 /* skip over leading white space */
375 while (isspace((int)*str)) str++;
376
377 if (str[0] == '-')
378 {
379 /* explicit signal specified */
380 if ((nptr = next_field(str)) == NULL)
381 {
382 message_error(" kill: no processes specified");
383 return;
384 }
385
386 str++;
387 if (isdigit((int)str[0]))
388 {
389 (void) scanint(str, &signum);
390 if (signum <= 0 || signum >= NSIG)
391 {
392 message_error(" kill: invalid signal number");
393 return;
394 }
395 }
396 else
397 {
398 /* translate the name into a number */
399 #ifdef USE_SYS_SIGLIST
400 for (signum = 1; signum < NSIG; signum++)
401 {
402 if (strcasecmp(sys_signame[signum], str) == 0)
403 {
404 break;
405 }
406 }
407 if (signum == NSIG)
408 {
409 message_error(" kill: bad signal name");
410 return;
411 }
412 #else
413 for (sigp = sigdesc; sigp->name != NULL; sigp++)
414 {
415 #ifdef HAVE_STRCASECMP
416 if (strcasecmp(sigp->name, str) == 0)
417 #else
418 if (strcmp(sigp->name, str) == 0)
419 #endif
420 {
421 signum = sigp->number;
422 break;
423 }
424 }
425
426 /* was it ever found */
427 if (sigp->name == NULL)
428 {
429 message_error(" kill: bad signal name");
430 return;
431 }
432 #endif
433 }
434 /* put the new pointer in place */
435 str = nptr;
436 }
437
438 /* loop thru the string, killing processes */
439 do
440 {
441 if (scanint(str, &procnum) == -1)
442 {
443 ERROR(str, 0);
444 }
445 else
446 {
447 /* check process owner if we're not root */
448 owner = proc_owner(procnum);
449 if (uid && (uid != owner))
450 {
451 ERROR(str, owner == -1 ? ESRCH : EACCES);
452 }
453 /* go in for the kill */
454 else if (kill(procnum, signum) == -1)
455 {
456 /* chalk up an error */
457 ERROR(str, errno);
458 }
459 }
460 } while ((str = next_field(str)) != NULL);
461
462 /* process errors */
463 err_string();
464 }
465
466 /*
467 * renice_procs(str) - change the "nice" of processes, much like the
468 * "renice" command does; invoked in response to 'r'.
469 */
470
471 static void
renice_procs(char * str)472 renice_procs(char *str)
473
474 {
475 register char negate;
476 int prio;
477 int procnum;
478 int uid;
479
480 ERR_RESET;
481 uid = getuid();
482
483 /* allow for negative priority values */
484 if ((negate = (*str == '-')) != 0)
485 {
486 /* move past the minus sign */
487 str++;
488 }
489
490 /* use procnum as a temporary holding place and get the number */
491 procnum = scanint(str, &prio);
492
493 /* negate if necessary */
494 if (negate)
495 {
496 prio = -prio;
497 }
498
499 #if defined(PRIO_MIN) && defined(PRIO_MAX)
500 /* check for validity */
501 if (procnum == -1 || prio < PRIO_MIN || prio > PRIO_MAX)
502 {
503 message_error(" renice: bad priority value");
504 return;
505 }
506 #endif
507
508 /* move to the first process number */
509 if ((str = next_field(str)) == NULL)
510 {
511 message_error(" renice: no processes specified");
512 return;
513 }
514
515 #ifdef HAVE_SETPRIORITY
516 /* loop thru the process numbers, renicing each one */
517 do
518 {
519 if (scanint(str, &procnum) == -1)
520 {
521 ERROR(str, 0);
522 }
523
524 /* check process owner if we're not root */
525 else if (uid && (uid != proc_owner(procnum)))
526 {
527 ERROR(str, EACCES);
528 }
529 else if (setpriority(PRIO_PROCESS, procnum, prio) == -1)
530 {
531 ERROR(str, errno);
532 }
533 } while ((str = next_field(str)) != NULL);
534 err_string();
535 #else
536 message_error(" renice operation not supported");
537 #endif
538 }
539
540 /* COMMAND ROUTINES */
541
542 /*
543 * Each command routine is called by command_process and is passed a
544 * pointer to the current global state. Command routines are free
545 * to change anything in the global state, although changes to the
546 * statics structure are discouraged. Whatever a command routine
547 * returns will be returned by command_process.
548 */
549
550 static void
cmd_quit(globalstate * gstate)551 cmd_quit(globalstate *gstate)
552
553 {
554 quit(EX_OK);
555 /*NOTREACHED*/
556 }
557
558 static int
cmd_update(globalstate * gstate)559 cmd_update(globalstate *gstate)
560
561 {
562 /* go home for visual feedback */
563 screen_home();
564 fflush(stdout);
565 message_expire();
566 return CMD_REFRESH;
567 }
568
569 static int
cmd_redraw(globalstate * gstate)570 cmd_redraw(globalstate *gstate)
571
572 {
573 gstate->fulldraw = Yes;
574 return CMD_REFRESH;
575 }
576
577 static int
cmd_color(globalstate * gstate)578 cmd_color(globalstate *gstate)
579
580 {
581 gstate->use_color = color_activate(-1);
582 gstate->fulldraw = Yes;
583 return CMD_REFRESH;
584 }
585
586 static int
cmd_number(globalstate * gstate)587 cmd_number(globalstate *gstate)
588
589 {
590 int newval;
591 char tmpbuf[20];
592
593 message_prompt("Number of processes to show: ");
594 newval = readline(tmpbuf, 8, Yes);
595 if (newval > -1)
596 {
597 if (newval > gstate->max_topn)
598 {
599 message_error(" This terminal can only display %d processes",
600 gstate->max_topn);
601 }
602
603 if (newval == 0)
604 {
605 /* inhibit the header */
606 display_header(No);
607 }
608
609 else if (gstate->topn == 0)
610 {
611 display_header(Yes);
612 }
613
614 gstate->topn = newval;
615 }
616 return CMD_REFRESH;
617 }
618
619 static int
cmd_delay(globalstate * gstate)620 cmd_delay(globalstate *gstate)
621
622 {
623 double newval;
624 char tmpbuf[20];
625
626 message_prompt("Seconds to delay: ");
627 if (readline(tmpbuf, 8, No) > 0)
628 {
629 newval = atof(tmpbuf);
630 if (newval == 0 && getuid() != 0)
631 {
632 gstate->delay = 1;
633 }
634 else
635 {
636 gstate->delay = newval;
637 }
638 }
639 return CMD_REFRESH;
640 }
641
642 static int
cmd_idle(globalstate * gstate)643 cmd_idle(globalstate *gstate)
644
645 {
646 gstate->pselect.idle = !gstate->pselect.idle;
647 message_error(" %sisplaying idle processes.",
648 gstate->pselect.idle ? "D" : "Not d");
649 return CMD_REFRESH;
650 }
651
652 static int
cmd_displays(globalstate * gstate)653 cmd_displays(globalstate *gstate)
654
655 {
656 int i;
657 char tmpbuf[20];
658
659 message_prompt("Displays to show (currently %s): ",
660 gstate->displays == -1 ? "infinite" :
661 itoa(gstate->displays));
662
663 if ((i = readline(tmpbuf, 10, Yes)) > 0)
664 {
665 gstate->displays = i;
666 }
667 else if (i == 0)
668 {
669 quit(EX_OK);
670 /*NOTREACHED*/
671 }
672 return CMD_OK;
673 }
674
675 static int
cmd_cmdline(globalstate * gstate)676 cmd_cmdline(globalstate *gstate)
677
678 {
679 if (gstate->statics->flags.fullcmds)
680 {
681 gstate->pselect.fullcmd = !gstate->pselect.fullcmd;
682 message_error(" %sisplaying full command lines.",
683 gstate->pselect.fullcmd ? "D" : "Not d");
684 return CMD_REFRESH;
685 }
686 message_error(" Full command display not supported.");
687 return CMD_OK;
688 }
689
690 static int
cmd_order(globalstate * gstate)691 cmd_order(globalstate *gstate)
692
693 {
694 char tmpbuf[MAX_COLS];
695 int i;
696
697 if (gstate->statics->order_names != NULL)
698 {
699 message_prompt("Column to sort: ");
700 if (readline(tmpbuf, sizeof(tmpbuf), No) > 0)
701 {
702 if ((i = string_index(tmpbuf, gstate->statics->order_names)) == -1)
703 {
704 message_error(" Sort order \"%s\" not recognized", tmpbuf);
705 }
706 else
707 {
708 gstate->order_index = i;
709 return CMD_REFRESH;
710 }
711 }
712 }
713 return CMD_OK;
714 }
715
716 static int
cmd_order_x(globalstate * gstate,const char * name,...)717 cmd_order_x(globalstate *gstate, const char *name, ...)
718
719 {
720 va_list ap;
721 char *p;
722 const char **names;
723 int i;
724
725 names = gstate->statics->order_names;
726 if (names != NULL)
727 {
728 if ((i = string_index(name, names)) == -1)
729 {
730 /* check the alternate list */
731 va_start(ap, name);
732 p = va_arg(ap, char *);
733 while (p != NULL)
734 {
735 if ((i = string_index(p, names)) != -1)
736 {
737 gstate->order_index = i;
738 return CMD_REFRESH;
739 }
740 p = va_arg(ap, char *);
741 }
742 message_error(" Sort order not recognized");
743 }
744 else
745 {
746 gstate->order_index = i;
747 return CMD_REFRESH;
748 }
749 }
750 return CMD_OK;
751 }
752
753 static int
cmd_order_cpu(globalstate * gstate)754 cmd_order_cpu(globalstate *gstate)
755
756 {
757 return cmd_order_x(gstate, "cpu", NULL);
758 }
759
760 static int
cmd_order_pid(globalstate * gstate)761 cmd_order_pid(globalstate *gstate)
762
763 {
764 return cmd_order_x(gstate, "pid", NULL);
765 }
766
767 static int
cmd_order_mem(globalstate * gstate)768 cmd_order_mem(globalstate *gstate)
769
770 {
771 return cmd_order_x(gstate, "mem", "size", NULL);
772 }
773
774 static int
cmd_order_time(globalstate * gstate)775 cmd_order_time(globalstate *gstate)
776
777 {
778 return cmd_order_x(gstate, "time");
779 }
780
781 #ifdef ENABLE_KILL
782
783 static int
cmd_kill(globalstate * gstate)784 cmd_kill(globalstate *gstate)
785
786 {
787 char tmpbuf[MAX_COLS];
788
789 message_prompt_plain("kill ");
790 if (readline(tmpbuf, sizeof(tmpbuf), No) > 0)
791 {
792 kill_procs(tmpbuf);
793 }
794 return CMD_OK;
795 }
796
797 static int
cmd_renice(globalstate * gstate)798 cmd_renice(globalstate *gstate)
799
800 {
801 char tmpbuf[MAX_COLS];
802
803 message_prompt_plain("renice ");
804 if (readline(tmpbuf, sizeof(tmpbuf), No) > 0)
805 {
806 renice_procs(tmpbuf);
807 }
808 return CMD_OK;
809 }
810
811 #endif
812
813 static int
cmd_pid(globalstate * gstate)814 cmd_pid(globalstate *gstate)
815
816 {
817 char tmpbuf[MAX_COLS];
818
819 message_prompt_plain("select pid ");
820 gstate->pselect.pid = -1;
821 if (readline(tmpbuf, sizeof(tmpbuf), No) > 0)
822 {
823 int pid;
824 if (scanint(tmpbuf, &pid) == 0)
825 gstate->pselect.pid = pid;
826 }
827 return CMD_OK;
828 }
829
830 static int
cmd_user(globalstate * gstate)831 cmd_user(globalstate *gstate)
832
833 {
834 char linebuf[MAX_COLS];
835 int i;
836 int ret = CMD_OK;
837
838 message_prompt("Username to show: ");
839 if (readline(linebuf, sizeof(linebuf), No) > 0)
840 {
841 if (linebuf[0] == '+' &&
842 linebuf[1] == '\0')
843 {
844 gstate->pselect.uid = -1;
845 ret = CMD_REFRESH;
846 }
847 else if ((i = userid(linebuf)) == -1)
848 {
849 message_error(" %s: unknown user", linebuf);
850 }
851 else
852 {
853 gstate->pselect.uid = i;
854 ret = CMD_REFRESH;
855 }
856 }
857 return ret;
858 }
859
860 static int
cmd_command(globalstate * gstate)861 cmd_command(globalstate *gstate)
862
863 {
864 char linebuf[MAX_COLS];
865
866 if (gstate->pselect.command != NULL)
867 {
868 free(gstate->pselect.command);
869 gstate->pselect.command = NULL;
870 }
871
872 message_prompt("Command to show: ");
873 if (readline(linebuf, sizeof(linebuf), No) > 0)
874 {
875 if (linebuf[0] != '\0')
876 {
877 gstate->pselect.command = estrdup(linebuf);
878 }
879 }
880 return CMD_REFRESH;
881 }
882
883 static int
cmd_useruid(globalstate * gstate)884 cmd_useruid(globalstate *gstate)
885
886 {
887 gstate->pselect.usernames = !gstate->pselect.usernames;
888 display_header(2);
889 return CMD_REFRESH;
890 }
891
892 static int
cmd_mode(globalstate * gstate)893 cmd_mode(globalstate *gstate)
894
895 {
896 if (gstate->statics->modemax <= 1)
897 {
898 return CMD_NA;
899 }
900 gstate->pselect.mode = (gstate->pselect.mode + 1) % gstate->statics->modemax;
901 display_header(2);
902 return CMD_REFRESH;
903 }
904
905 static int
cmd_system(globalstate * gstate)906 cmd_system(globalstate *gstate)
907
908 {
909 gstate->pselect.system = !gstate->pselect.system;
910 display_header(2);
911 return CMD_REFRESH;
912 }
913
914 static int
cmd_threads(globalstate * gstate)915 cmd_threads(globalstate *gstate)
916
917 {
918 if (gstate->statics->flags.threads)
919 {
920 gstate->pselect.threads = !gstate->pselect.threads;
921 display_header(2);
922 return CMD_REFRESH;
923 }
924 return CMD_NA;
925 }
926
927 static int
cmd_percpustates(globalstate * gstate)928 cmd_percpustates(globalstate *gstate)
929 {
930 gstate->percpustates = !gstate->percpustates;
931 gstate->fulldraw = Yes;
932 gstate->max_topn += display_setmulti(gstate->percpustates);
933 return CMD_REFRESH;
934 }
935
936
937 /* forward reference for cmd_help, as it needs to see the command_table */
938 int cmd_help(globalstate *gstate);
939
940 /* command table */
941 command command_table[] = {
942 { '\014', cmd_redraw, "redraw screen" },
943 { ' ', cmd_update, "update screen" },
944 { '?', cmd_help, "help; show this text" },
945 { 'h', cmd_help, NULL },
946 { '1', cmd_percpustates, "toggle the display of cpu states per cpu" },
947 { 'C', cmd_color, "toggle the use of color" },
948 { 'H', cmd_threads, "toggle the display of individual threads" },
949 { 't', cmd_threads, NULL },
950 { 'M', cmd_order_mem, "sort by memory usage" },
951 { 'N', cmd_order_pid, "sort by process id" },
952 { 'P', cmd_order_cpu, "sort by CPU usage" },
953 { 'S', cmd_system, "toggle the display of system processes" },
954 { 'T', cmd_order_time, "sort by CPU time" },
955 { 'U', cmd_useruid, "toggle the display of usernames or uids" },
956 { 'c', cmd_command, "display processes by command name" },
957 { 'd', cmd_displays, "change number of displays to show" },
958 { 'f', cmd_cmdline, "toggle the display of full command paths" },
959 { 'i', cmd_idle, "toggle the displaying of idle processes" },
960 { 'I', cmd_idle, NULL },
961 #ifdef ENABLE_KILL
962 { 'k', cmd_kill, "kill processes; send a signal to a list of processes" },
963 #endif
964 { 'm', cmd_mode, "toggle between display modes" },
965 { 'n', cmd_number, "change number of processes to display" },
966 { '#', cmd_number, NULL },
967 { 'o', cmd_order, "specify sort order (see below)" },
968 { 'p', cmd_pid, "select a single pid" },
969 { 'q', (int (*)(globalstate *))cmd_quit, "quit" },
970 #ifdef ENABLE_KILL
971 { 'r', cmd_renice, "renice a process" },
972 #endif
973 { 's', cmd_delay, "change number of seconds to delay between updates" },
974 { 'u', cmd_user, "display processes for only one user (+ selects all users)" },
975 { '\0', NULL, NULL },
976 };
977
978 int
cmd_help(globalstate * gstate)979 cmd_help(globalstate *gstate)
980
981 {
982 command *c;
983 char buf[12];
984 char *p;
985 const char *help;
986
987 display_pagerstart();
988
989 display_pager("Top version %s, %s\n", version_string(), copyright);
990 display_pager("Platform module: %s\n\n", MODULE);
991 display_pager("A top users display for Unix\n\n");
992 display_pager("These single-character commands are available:\n\n");
993
994 c = command_table;
995 while (c->cmd_func != NULL)
996 {
997 /* skip null help strings */
998 if ((help = c->help) == NULL)
999 {
1000 continue;
1001 }
1002
1003 /* translate character in to something readable */
1004 if (c->ch < ' ')
1005 {
1006 buf[0] = '^';
1007 buf[1] = c->ch + '@';
1008 buf[2] = '\0';
1009 }
1010 else if (c->ch == ' ')
1011 {
1012 strcpy(buf, "<sp>");
1013 }
1014 else
1015 {
1016 buf[0] = c->ch;
1017 buf[1] = '\0';
1018 }
1019
1020 /* if the next command is the same, fold them onto one line */
1021 if ((c+1)->cmd_func == c->cmd_func)
1022 {
1023 strcat(buf, " or ");
1024 p = buf + strlen(buf);
1025 *p++ = (c+1)->ch;
1026 *p = '\0';
1027 c++;
1028 }
1029
1030 display_pager("%-7s - %s\n", buf, help);
1031 c++;
1032 }
1033
1034 display_pager("\nNot all commands are available on all systems.\n\n");
1035 display_pager("Available sort orders: %s\n", gstate->order_namelist);
1036 display_pagerend();
1037 gstate->fulldraw = Yes;
1038 return CMD_REFRESH;
1039 }
1040
1041 /*
1042 * int command_process(globalstate *gstate, int cmd)
1043 *
1044 * Process the single-character command "cmd". The global state may
1045 * be modified by the command to alter the output. Returns CMD_ERROR
1046 * if there was a serious error that requires an immediate exit, CMD_OK
1047 * to indicate success, CMD_REFRESH to indicate that the screen needs
1048 * to be refreshed immediately, CMD_UNKNOWN when the command is not known,
1049 * and CMD_NA when the command is not available. Error messages for
1050 * CMD_NA and CMD_UNKNOWN must be handled by the caller.
1051 */
1052
1053 int
command_process(globalstate * gstate,int cmd)1054 command_process(globalstate *gstate, int cmd)
1055
1056 {
1057 command *c;
1058
1059 c = command_table;
1060 while (c->cmd_func != NULL)
1061 {
1062 if (c->ch == cmd)
1063 {
1064 return (c->cmd_func)(gstate);
1065 }
1066 c++;
1067 }
1068
1069 return CMD_UNKNOWN;
1070 }
1071