2 * top - a top users display for Unix
4 * SYNOPSIS: For DragonFly 2.x and later
7 * Originally written for BSD4.4 system by Christos Zoulas.
8 * Ported to FreeBSD 2.x by Steven Wallace && Wolfram Schneider
9 * Order support hacked in from top-3.5beta6/machine/m_aix41.c
10 * by Monte Mitzelfelt (for latest top see http://www.groupsys.com/topinfo/)
12 * This is the machine-dependent module for DragonFly 2.5.1
14 * DragonFly 2.x and above
18 * AUTHOR: Jan Lentfer <Jan.Lentfer@web.de>
19 * This module has been put together from different sources and is based on the
20 * work of many other people, e.g. Matthew Dillon, Simon Schubert, Jordan Gordeev.
22 * $FreeBSD: src/usr.bin/top/machine.c,v 1.29.2.2 2001/07/31 20:27:05 tmm Exp $
23 * $DragonFly: src/usr.bin/top/machine.c,v 1.26 2008/10/16 01:52:33 swildner Exp $
27 #include <sys/types.h>
28 #include <sys/signal.h>
29 #include <sys/param.h>
38 #include <sys/errno.h>
39 #include <sys/sysctl.h>
43 #include <sys/vmmeter.h>
44 #include <sys/resource.h>
45 #include <sys/rtprio.h>
52 #include <osreldate.h> /* for changes in kernel structures */
54 #include <sys/kinfo.h>
62 int swapmode(int *retavail
, int *retfree
);
64 static int namelength
;
66 static int show_fullcmd
;
71 * needs to be a global symbol, so wrapper can be modified accordingly.
73 static int show_threads
= 0;
75 /* get_process_info passes back a handle. This is what it looks like: */
78 struct kinfo_proc
**next_proc
; /* points to next valid proc pointer */
79 int remaining
; /* number of pointers remaining */
82 /* declarations for load_avg */
85 #define PP(pp, field) ((pp)->kp_ ## field)
86 #define LP(pp, field) ((pp)->kp_lwp.kl_ ## field)
87 #define VP(pp, field) ((pp)->kp_vm_ ## field)
89 /* define what weighted cpu is. */
90 #define weighted_cpu(pct, pp) (PP((pp), swtime) == 0 ? 0.0 : \
91 ((pct) / (1.0 - exp(PP((pp), swtime) * logcpu))))
93 /* what we consider to be process size: */
94 #define PROCSIZE(pp) (VP((pp), map_size) / 1024)
97 * These definitions control the format of the per-process area
100 static char smp_header
[] =
101 " PID %-*.*s PRI NICE SIZE RES STATE C TIME CTIME CPU COMMAND";
103 #define smp_Proc_format \
104 "%5d %-*.*s %3d %3d%7s %6s %-6.6s %1x%7s %7s %5.2f%% %.*s"
106 static char up_header
[] =
107 " PID %-*.*s PRI NICE SIZE RES STATE TIME CTIME CPU COMMAND";
109 #define up_Proc_format \
110 "%5d %-*.*s %3d %3d%7s %6s %-6.6s%.0d%7s %7s %5.2f%% %.*s"
114 /* process state names for the "STATE" column of the display */
116 * the extra nulls in the string "run" are for adding a slash and the
117 * processor number when needed
120 const char *state_abbrev
[] = {
121 "", "RUN\0\0\0", "STOP", "SLEEP",
127 /* values that we stash away in _init and use in later routines */
129 static double logcpu
;
134 /* these are for calculating cpu state percentages */
136 static struct kinfo_cputime
*cp_time
, *cp_old
;
138 /* these are for detailing the process states */
140 int process_states
[6];
141 char *procstatenames
[] = {
142 "", " starting, ", " running, ", " sleeping, ", " stopped, ",
147 /* these are for detailing the cpu states */
150 char *cpustatenames
[CPU_STATES
+ 1] = {
151 "user", "nice", "system", "interrupt", "idle", NULL
154 /* these are for detailing the memory statistics */
156 long memory_stats
[7];
157 char *memorynames
[] = {
158 "K Active, ", "K Inact, ", "K Wired, ", "K Cache, ", "K Buf, ", "K Free",
163 char *swapnames
[] = {
165 "K Total, ", "K Used, ", "K Free, ", "% Inuse, ", "K In, ", "K Out",
170 /* these are for keeping track of the proc array */
173 static int onproc
= -1;
175 static struct kinfo_proc
*pbase
;
176 static struct kinfo_proc
**pref
;
178 /* these are for getting the memory statistics */
180 static int pageshift
; /* log base 2 of the pagesize */
182 /* define pagetok in terms of pageshift */
184 #define pagetok(size) ((size) << pageshift)
186 /* sorting orders. first is default */
187 char *ordernames
[] = {
188 "cpu", "size", "res", "time", "pri", "thr", "pid", "ctime", NULL
191 /* compare routines */
192 int proc_compare (struct kinfo_proc
**, struct kinfo_proc
**);
193 int compare_size (struct kinfo_proc
**, struct kinfo_proc
**);
194 int compare_res (struct kinfo_proc
**, struct kinfo_proc
**);
195 int compare_time (struct kinfo_proc
**, struct kinfo_proc
**);
196 int compare_ctime (struct kinfo_proc
**, struct kinfo_proc
**);
197 int compare_prio(struct kinfo_proc
**, struct kinfo_proc
**);
198 int compare_thr (struct kinfo_proc
**, struct kinfo_proc
**);
199 int compare_pid (struct kinfo_proc
**, struct kinfo_proc
**);
201 int (*proc_compares
[]) (struct kinfo_proc
**,struct kinfo_proc
**) = {
214 cputime_percentages(int out
[CPU_STATES
], struct kinfo_cputime
*new,
215 struct kinfo_cputime
*old
)
217 struct kinfo_cputime diffs
;
218 uint64_t total_change
, half_total
;
223 diffs
.cp_user
= new->cp_user
- old
->cp_user
;
224 diffs
.cp_nice
= new->cp_nice
- old
->cp_nice
;
225 diffs
.cp_sys
= new->cp_sys
- old
->cp_sys
;
226 diffs
.cp_intr
= new->cp_intr
- old
->cp_intr
;
227 diffs
.cp_idle
= new->cp_idle
- old
->cp_idle
;
228 total_change
= diffs
.cp_user
+ diffs
.cp_nice
+ diffs
.cp_sys
+
229 diffs
.cp_intr
+ diffs
.cp_idle
;
230 old
->cp_user
= new->cp_user
;
231 old
->cp_nice
= new->cp_nice
;
232 old
->cp_sys
= new->cp_sys
;
233 old
->cp_intr
= new->cp_intr
;
234 old
->cp_idle
= new->cp_idle
;
236 /* avoid divide by zero potential */
237 if (total_change
== 0)
240 /* calculate percentages based on overall change, rounding up */
241 half_total
= total_change
>> 1;
243 out
[0] = ((diffs
.cp_user
* 1000LL + half_total
) / total_change
);
244 out
[1] = ((diffs
.cp_nice
* 1000LL + half_total
) / total_change
);
245 out
[2] = ((diffs
.cp_sys
* 1000LL + half_total
) / total_change
);
246 out
[3] = ((diffs
.cp_intr
* 1000LL + half_total
) / total_change
);
247 out
[4] = ((diffs
.cp_idle
* 1000LL + half_total
) / total_change
);
251 machine_init(struct statics
*statics
)
256 struct timeval boottime
;
259 if (kinfo_get_cpus(&n_cpus
))
260 err(1, "kinfo_get_cpus failed");
263 modelen
= sizeof(boottime
);
264 if (sysctlbyname("kern.boottime", &boottime
, &modelen
, NULL
, 0) == -1) {
265 /* we have no boottime to report */
266 boottime
.tv_sec
= -1;
268 modelen
= sizeof(smpmode
);
269 if ((sysctlbyname("machdep.smp_active", &smpmode
, &modelen
, NULL
, 0) < 0 &&
270 sysctlbyname("smp.smp_active", &smpmode
, &modelen
, NULL
, 0) < 0) ||
271 modelen
!= sizeof(smpmode
))
274 while ((pw
= getpwent()) != NULL
) {
275 if ((int)strlen(pw
->pw_name
) > namelength
)
276 namelength
= strlen(pw
->pw_name
);
280 if (smpmode
&& namelength
> 13)
282 else if (namelength
> 15)
285 if ((kd
= kvm_open(NULL
, NULL
, NULL
, O_RDONLY
, NULL
)) == NULL
)
288 if (kinfo_get_sched_ccpu(&ccpu
)) {
289 fprintf(stderr
, "top: kinfo_get_sched_ccpu failed\n");
292 /* this is used in calculating WCPU -- calculate it ahead of time */
293 logcpu
= log(loaddouble(ccpu
));
300 * get the page size with "getpagesize" and calculate pageshift from
303 pagesize
= getpagesize();
305 while (pagesize
> 1) {
310 /* we only need the amount of log(2)1024 for our conversion */
311 pageshift
-= LOG1024
;
313 /* fill in the statics information */
314 statics
->procstate_names
= procstatenames
;
315 statics
->cpustate_names
= cpustatenames
;
316 statics
->memory_names
= memorynames
;
317 statics
->boottime
= boottime
.tv_sec
;
318 statics
->swap_names
= swapnames
;
319 statics
->order_names
= ordernames
;
320 /* we need kvm descriptor in order to show full commands */
321 statics
->flags
.fullcmds
= kd
!= NULL
;
328 format_header(char *uname_field
)
330 static char Header
[128];
332 snprintf(Header
, sizeof(Header
), smpmode
? smp_header
: up_header
,
333 namelength
, namelength
, uname_field
);
335 if (screen_width
<= 79)
338 cmdlength
= screen_width
;
340 cmdlength
= cmdlength
- strlen(Header
) + 6;
345 static int swappgsin
= -1;
346 static int swappgsout
= -1;
347 extern struct timeval timeout
;
350 get_system_info(struct system_info
*si
)
355 if (cpu_states
== NULL
) {
356 cpu_states
= malloc(sizeof(*cpu_states
) * CPU_STATES
* n_cpus
);
357 if (cpu_states
== NULL
)
359 bzero(cpu_states
, sizeof(*cpu_states
) * CPU_STATES
* n_cpus
);
361 if (cp_time
== NULL
) {
362 cp_time
= malloc(2 * n_cpus
* sizeof(cp_time
[0]));
365 cp_old
= cp_time
+ n_cpus
;
367 len
= n_cpus
* sizeof(cp_old
[0]);
369 if (sysctlbyname("kern.cputime", cp_old
, &len
, NULL
, 0))
370 err(1, "kern.cputime");
372 len
= n_cpus
* sizeof(cp_time
[0]);
374 if (sysctlbyname("kern.cputime", cp_time
, &len
, NULL
, 0))
375 err(1, "kern.cputime");
377 getloadavg(si
->load_avg
, 3);
381 /* convert cp_time counts to percentages */
382 for (cpu
= 0; cpu
< n_cpus
; ++cpu
) {
383 cputime_percentages(cpu_states
+ cpu
* CPU_STATES
,
384 &cp_time
[cpu
], &cp_old
[cpu
]);
387 /* sum memory & swap statistics */
391 size_t vms_size
= sizeof(vms
);
392 size_t vmm_size
= sizeof(vmm
);
393 static unsigned int swap_delay
= 0;
394 static int swapavail
= 0;
395 static int swapfree
= 0;
396 static int bufspace
= 0;
398 if (sysctlbyname("vm.vmstats", &vms
, &vms_size
, NULL
, 0))
399 err(1, "sysctlbyname: vm.vmstats");
401 if (sysctlbyname("vm.vmmeter", &vmm
, &vmm_size
, NULL
, 0))
402 err(1, "sysctlbyname: vm.vmmeter");
404 if (kinfo_get_vfs_bufspace(&bufspace
))
405 err(1, "kinfo_get_vfs_bufspace");
407 /* convert memory stats to Kbytes */
408 memory_stats
[0] = pagetok(vms
.v_active_count
);
409 memory_stats
[1] = pagetok(vms
.v_inactive_count
);
410 memory_stats
[2] = pagetok(vms
.v_wire_count
);
411 memory_stats
[3] = pagetok(vms
.v_cache_count
);
412 memory_stats
[4] = bufspace
/ 1024;
413 memory_stats
[5] = pagetok(vms
.v_free_count
);
414 memory_stats
[6] = -1;
421 /* compute differences between old and new swap statistic */
423 swap_stats
[4] = pagetok(((vmm
.v_swappgsin
- swappgsin
)));
424 swap_stats
[5] = pagetok(((vmm
.v_swappgsout
- swappgsout
)));
427 swappgsin
= vmm
.v_swappgsin
;
428 swappgsout
= vmm
.v_swappgsout
;
430 /* call CPU heavy swapmode() only for changes */
431 if (swap_stats
[4] > 0 || swap_stats
[5] > 0 || swap_delay
== 0) {
432 swap_stats
[3] = swapmode(&swapavail
, &swapfree
);
433 swap_stats
[0] = swapavail
;
434 swap_stats
[1] = swapavail
- swapfree
;
435 swap_stats
[2] = swapfree
;
441 /* set arrays and strings */
442 si
->cpustates
= cpu_states
;
443 si
->memory
= memory_stats
;
444 si
->swap
= swap_stats
;
448 si
->last_pid
= lastpid
;
455 static struct handle handle
;
458 get_process_info(struct system_info
*si
, struct process_select
*sel
,
464 struct kinfo_proc
**prefp
;
465 struct kinfo_proc
*pp
;
467 /* these are copied out of sel for speed */
473 pbase
= kvm_getprocs(kd
, KERN_PROC_ALL
, 0, &nproc
);
475 pref
= (struct kinfo_proc
**)realloc(pref
, sizeof(struct kinfo_proc
*)
477 if (pref
== NULL
|| pbase
== NULL
) {
478 (void)fprintf(stderr
, "top: Out of memory.\n");
481 /* get a pointer to the states summary array */
482 si
->procstates
= process_states
;
484 /* set up flags which define what we are going to select */
485 show_idle
= sel
->idle
;
486 show_system
= sel
->system
;
487 show_uid
= sel
->uid
!= -1;
488 show_fullcmd
= sel
->fullcmd
;
490 /* count up process states and get pointers to interesting procs */
493 memset((char *)process_states
, 0, sizeof(process_states
));
495 for (pp
= pbase
, i
= 0; i
< nproc
; pp
++, i
++) {
497 * Place pointers to each valid proc structure in pref[].
498 * Process slots that are actually in use have a non-zero
499 * status field. Processes with P_SYSTEM set are system
500 * processes---these get ignored unless show_sysprocs is set.
502 if ((show_threads
&& (LP(pp
, pid
) == -1)) ||
503 (show_system
|| ((PP(pp
, flags
) & P_SYSTEM
) == 0))) {
505 process_states
[(unsigned char)PP(pp
, stat
)]++;
506 if ((show_threads
&& (LP(pp
, pid
) == -1)) ||
507 (show_idle
|| (LP(pp
, pctcpu
) != 0) ||
508 (LP(pp
, stat
) == LSRUN
)) &&
509 (!show_uid
|| PP(pp
, ruid
) == (uid_t
) sel
->uid
)) {
516 qsort((char *)pref
, active_procs
, sizeof(struct kinfo_proc
*),
517 (int (*)(const void *, const void *))proc_compares
[compare_index
]);
519 /* remember active and total counts */
520 si
->p_total
= total_procs
;
521 si
->p_active
= pref_len
= active_procs
;
523 /* pass back a handle */
524 handle
.next_proc
= pref
;
525 handle
.remaining
= active_procs
;
526 return ((caddr_t
) & handle
);
529 char fmt
[128]; /* static area where result is built */
532 format_next_process(caddr_t xhandle
, char *(*get_userid
) (int))
534 struct kinfo_proc
*pp
;
544 char cputime_fmt
[10], ccputime_fmt
[10];
546 /* find and remember the next proc structure */
547 hp
= (struct handle
*)xhandle
;
548 pp
= *(hp
->next_proc
++);
551 /* get the process's command name */
553 if ((comm_full
= kvm_getargv(kd
, pp
, 0)) == NULL
) {
562 * Convert the process's runtime from microseconds to seconds. This
563 * time includes the interrupt time to be in compliance with ps output.
565 cputime
= (LP(pp
, uticks
) + LP(pp
, sticks
) + LP(pp
, iticks
)) / 1000000;
566 ccputime
= cputime
+ PP(pp
, cru
).ru_stime
.tv_sec
+ PP(pp
, cru
).ru_utime
.tv_sec
;
567 format_time(cputime
, cputime_fmt
, sizeof(cputime_fmt
));
568 format_time(ccputime
, ccputime_fmt
, sizeof(ccputime_fmt
));
570 /* calculate the base for cpu percentages */
571 pct
= pctdouble(LP(pp
, pctcpu
));
573 /* generate "STATE" field */
574 switch (state
= LP(pp
, stat
)) {
576 if (smpmode
&& LP(pp
, tdflags
) & TDF_RUNNING
)
577 sprintf(status
, "CPU%d", LP(pp
, cpuid
));
579 strcpy(status
, "RUN");
582 if (LP(pp
, wmesg
) != NULL
) {
583 sprintf(status
, "%.6s", LP(pp
, wmesg
));
590 (unsigned)state
< sizeof(state_abbrev
) / sizeof(*state_abbrev
))
591 sprintf(status
, "%.6s", state_abbrev
[(unsigned char)state
]);
593 sprintf(status
, "?%5d", state
);
597 if (PP(pp
, stat
) == SZOMB
)
598 strcpy(status
, "ZOMB");
601 * idle time 0 - 31 -> nice value +21 - +52 normal time -> nice
602 * value -20 - +20 real time 0 - 31 -> nice value -52 - -21 thread
603 * 0 - 31 -> nice value -53 -
605 switch (LP(pp
, rtprio
.type
)) {
606 case RTP_PRIO_REALTIME
:
607 xnice
= PRIO_MIN
- 1 - RTP_PRIO_MAX
+ LP(pp
, rtprio
.prio
);
610 xnice
= PRIO_MAX
+ 1 + LP(pp
, rtprio
.prio
);
612 case RTP_PRIO_THREAD
:
613 xnice
= PRIO_MIN
- 1 - RTP_PRIO_MAX
- LP(pp
, rtprio
.prio
);
616 xnice
= PP(pp
, nice
);
620 /* format this entry */
621 snprintf(fmt
, sizeof(fmt
),
622 smpmode
? smp_Proc_format
: up_Proc_format
,
624 namelength
, namelength
,
625 get_userid(PP(pp
, ruid
)),
626 (int)((show_threads
&& (LP(pp
, pid
) == -1)) ?
627 LP(pp
, tdprio
) : LP(pp
, prio
)),
629 format_k(PROCSIZE(pp
)),
630 format_k(pagetok(VP(pp
, rssize
))),
632 (int)(smpmode
? LP(pp
, cpuid
) : 0),
637 show_fullcmd
? *comm_full
: comm
);
639 /* return the result */
643 /* comparison routines for qsort */
646 * proc_compare - comparison function for "qsort"
647 * Compares the resource consumption of two processes using five
648 * distinct keys. The keys (in descending order of importance) are:
649 * percent cpu, cpu ticks, state, resident set size, total virtual
650 * memory usage. The process states are ordered as follows (from least
651 * to most important): WAIT, zombie, sleep, stop, start, run. The
652 * array declaration below maps a process state index into a number
653 * that reflects this ordering.
656 static unsigned char sorted_state
[] =
660 1, /* ABANDONED (WAIT) */
668 #define ORDERKEY_PCTCPU \
669 if (lresult = (long) LP(p2, pctcpu) - (long) LP(p1, pctcpu), \
670 (result = lresult > 0 ? 1 : lresult < 0 ? -1 : 0) == 0)
672 #define CPTICKS(p) (LP(p, uticks) + LP(p, sticks) + LP(p, iticks))
674 #define ORDERKEY_CPTICKS \
675 if ((result = CPTICKS(p2) > CPTICKS(p1) ? 1 : \
676 CPTICKS(p2) < CPTICKS(p1) ? -1 : 0) == 0)
678 #define CTIME(p) (((LP(p, uticks) + LP(p, sticks) + LP(p, iticks))/1000000) + \
679 PP(p, cru).ru_stime.tv_sec + PP(p, cru).ru_utime.tv_sec)
681 #define ORDERKEY_CTIME \
682 if ((result = CTIME(p2) > CTIME(p1) ? 1 : \
683 CTIME(p2) < CTIME(p1) ? -1 : 0) == 0)
685 #define ORDERKEY_STATE \
686 if ((result = sorted_state[(unsigned char) PP(p2, stat)] - \
687 sorted_state[(unsigned char) PP(p1, stat)]) == 0)
689 #define ORDERKEY_PRIO \
690 if ((result = LP(p2, prio) - LP(p1, prio)) == 0)
692 #define ORDERKEY_KTHREADS \
693 if ((result = (LP(p1, pid) == 0) - (LP(p2, pid) == 0)) == 0)
695 #define ORDERKEY_KTHREADS_PRIO \
696 if ((result = LP(p2, tdprio) - LP(p1, tdprio)) == 0)
698 #define ORDERKEY_RSSIZE \
699 if ((result = VP(p2, rssize) - VP(p1, rssize)) == 0)
701 #define ORDERKEY_MEM \
702 if ( (result = PROCSIZE(p2) - PROCSIZE(p1)) == 0 )
704 #define ORDERKEY_PID \
705 if ( (result = PP(p1, pid) - PP(p2, pid)) == 0)
707 /* compare_cpu - the comparison function for sorting by cpu percentage */
710 proc_compare(struct kinfo_proc
**pp1
, struct kinfo_proc
**pp2
)
712 struct kinfo_proc
*p1
;
713 struct kinfo_proc
*p2
;
717 /* remove one level of indirection */
718 p1
= *(struct kinfo_proc
**) pp1
;
719 p2
= *(struct kinfo_proc
**) pp2
;
732 /* compare_size - the comparison function for sorting by total memory usage */
735 compare_size(struct kinfo_proc
**pp1
, struct kinfo_proc
**pp2
)
737 struct kinfo_proc
*p1
;
738 struct kinfo_proc
*p2
;
742 /* remove one level of indirection */
743 p1
= *(struct kinfo_proc
**) pp1
;
744 p2
= *(struct kinfo_proc
**) pp2
;
757 /* compare_res - the comparison function for sorting by resident set size */
760 compare_res(struct kinfo_proc
**pp1
, struct kinfo_proc
**pp2
)
762 struct kinfo_proc
*p1
;
763 struct kinfo_proc
*p2
;
767 /* remove one level of indirection */
768 p1
= *(struct kinfo_proc
**) pp1
;
769 p2
= *(struct kinfo_proc
**) pp2
;
782 /* compare_time - the comparison function for sorting by total cpu time */
785 compare_time(struct kinfo_proc
**pp1
, struct kinfo_proc
**pp2
)
787 struct kinfo_proc
*p1
;
788 struct kinfo_proc
*p2
;
792 /* remove one level of indirection */
793 p1
= *(struct kinfo_proc
**) pp1
;
794 p2
= *(struct kinfo_proc
**) pp2
;
799 ORDERKEY_KTHREADS_PRIO
810 compare_ctime(struct kinfo_proc
**pp1
, struct kinfo_proc
**pp2
)
812 struct kinfo_proc
*p1
;
813 struct kinfo_proc
*p2
;
817 /* remove one level of indirection */
818 p1
= *(struct kinfo_proc
**) pp1
;
819 p2
= *(struct kinfo_proc
**) pp2
;
824 ORDERKEY_KTHREADS_PRIO
834 /* compare_prio - the comparison function for sorting by cpu percentage */
837 compare_prio(struct kinfo_proc
**pp1
, struct kinfo_proc
**pp2
)
839 struct kinfo_proc
*p1
;
840 struct kinfo_proc
*p2
;
844 /* remove one level of indirection */
845 p1
= *(struct kinfo_proc
**) pp1
;
846 p2
= *(struct kinfo_proc
**) pp2
;
849 ORDERKEY_KTHREADS_PRIO
862 compare_thr(struct kinfo_proc
**pp1
, struct kinfo_proc
**pp2
)
864 struct kinfo_proc
*p1
;
865 struct kinfo_proc
*p2
;
869 /* remove one level of indirection */
870 p1
= *(struct kinfo_proc
**)pp1
;
871 p2
= *(struct kinfo_proc
**)pp2
;
874 ORDERKEY_KTHREADS_PRIO
885 /* compare_pid - the comparison function for sorting by process id */
888 compare_pid(struct kinfo_proc
**pp1
, struct kinfo_proc
**pp2
)
890 struct kinfo_proc
*p1
;
891 struct kinfo_proc
*p2
;
894 /* remove one level of indirection */
895 p1
= *(struct kinfo_proc
**) pp1
;
896 p2
= *(struct kinfo_proc
**) pp2
;
905 * proc_owner(pid) - returns the uid that owns process "pid", or -1 if
906 * the process does not exist.
907 * It is EXTREMLY IMPORTANT that this function work correctly.
908 * If top runs setuid root (as in SVR4), then this function
909 * is the only thing that stands in the way of a serious
910 * security problem. It validates requests for the "kill"
911 * and "renice" commands.
918 struct kinfo_proc
**prefp
;
919 struct kinfo_proc
*pp
;
923 while (--xcnt
>= 0) {
925 if (PP(pp
, pid
) == (pid_t
) pid
) {
926 return ((int)PP(pp
, ruid
));
934 * swapmode is based on a program called swapinfo written
935 * by Kevin Lahey <kml@rokkaku.atl.ga.us>.
938 swapmode(int *retavail
, int *retfree
)
941 int pagesize
= getpagesize();
942 struct kvm_swap swapary
[1];
947 #define CONVERT(v) ((quad_t)(v) * pagesize / 1024)
949 n
= kvm_getswapinfo(kd
, swapary
, 1, 0);
950 if (n
< 0 || swapary
[0].ksw_total
== 0)
953 *retavail
= CONVERT(swapary
[0].ksw_total
);
954 *retfree
= CONVERT(swapary
[0].ksw_total
- swapary
[0].ksw_used
);
956 n
= (int)((double)swapary
[0].ksw_used
* 100.0 /
957 (double)swapary
[0].ksw_total
);