usr.bin/top/m_dragonfly.c

   1 /*
   2  * top - a top users display for Unix
   3  *
   4  * SYNOPSIS:  For DragonFly 2.x and later
   5  *
   6  * DESCRIPTION:
   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/)
  11  *
  12  * This is the machine-dependent module for DragonFly 2.5.1
  13  * Should work for:
  14  *      DragonFly 2.x and above
  15  *
  16  * LIBS: -lkvm
  17  *
  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.
  21  *
  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 $
  24  */
  25
  26 #include <sys/time.h>
  27 #include <sys/types.h>
  28 #include <sys/signal.h>
  29 #include <sys/param.h>
  30
  31 #include "os.h"
  32 #include <err.h>
  33 #include <kvm.h>
  34 #include <stdio.h>
  35 #include <unistd.h>
  36 #include <math.h>
  37 #include <pwd.h>
  38 #include <sys/errno.h>
  39 #include <sys/sysctl.h>
  40 #include <sys/file.h>
  41 #include <sys/time.h>
  42 #include <sys/user.h>
  43 #include <sys/vmmeter.h>
  44 #include <sys/resource.h>
  45 #include <sys/rtprio.h>
  46
  47 /* Swap */
  48 #include <stdlib.h>
  49 #include <stdio.h>
  50 #include <sys/conf.h>
  51
  52 #include <osreldate.h>          /* for changes in kernel structures */
  53
  54 #include <sys/kinfo.h>
  55 #include <kinfo.h>
  56 #include "top.h"
  57 #include "display.h"
  58 #include "machine.h"
  59 #include "screen.h"
  60 #include "utils.h"
  61
  62 int swapmode(int *retavail, int *retfree);
  63 static int smpmode;
  64 static int namelength;
  65 static int cmdlength;
  66
  67 int n_cpus = 0;
  68
  69 /*
  70  * needs to be a global symbol, so wrapper can be modified accordingly.
  71  */
  72 static int show_threads = 0;
  73
  74 /* get_process_info passes back a handle.  This is what it looks like: */
  75
  76 struct handle {
  77         struct kinfo_proc **next_proc;  /* points to next valid proc pointer */
  78         int remaining;          /* number of pointers remaining */
  79 };
  80
  81 /* declarations for load_avg */
  82 #include "loadavg.h"
  83
  84 #define PP(pp, field) ((pp)->kp_ ## field)
  85 #define LP(pp, field) ((pp)->kp_lwp.kl_ ## field)
  86 #define VP(pp, field) ((pp)->kp_vm_ ## field)
  87
  88 /* define what weighted cpu is.  */
  89 #define weighted_cpu(pct, pp) (PP((pp), swtime) == 0 ? 0.0 : \
  90                          ((pct) / (1.0 - exp(PP((pp), swtime) * logcpu))))
  91
  92 /* what we consider to be process size: */
  93 #define PROCSIZE(pp) (VP((pp), map_size) / 1024)
  94
  95 /*
  96  * These definitions control the format of the per-process area
  97  */
  98
  99 static char smp_header[] =
 100 "  PID %-*.*s PRI NICE  SIZE    RES STATE  C   TIME   WCPU    CPU COMMAND";
 101
 102 #define smp_Proc_format \
 103         "%5d %-*.*s %3d %3d%7s %6s %-6.6s %1x%7s %5.2f%% %5.2f%% %.*s"
 104
 105 static char up_header[] =
 106 "  PID %-*.*s PRI NICE  SIZE    RES STATE    TIME   WCPU    CPU COMMAND";
 107
 108 #define up_Proc_format \
 109         "%5d %-*.*s %3d %3d%7s %6s %-6.6s%.0d%7s %5.2f%% %5.2f%% %.*s"
 110
 111
 112
 113 /* process state names for the "STATE" column of the display */
 114 /*
 115  * the extra nulls in the string "run" are for adding a slash and the
 116  * processor number when needed
 117  */
 118
 119 const char *state_abbrev[] = {
 120         "", "RUN\0\0\0", "STOP", "SLEEP",
 121 };
 122
 123
 124 static kvm_t *kd;
 125
 126 /* values that we stash away in _init and use in later routines */
 127
 128 static double logcpu;
 129
 130 static long lastpid;
 131 static int ccpu;
 132
 133 /* these are for calculating cpu state percentages */
 134
 135 static struct kinfo_cputime *cp_time, *cp_old;
 136
 137 /* these are for detailing the process states */
 138
 139 int process_states[6];
 140 char *procstatenames[] = {
 141         "", " starting, ", " running, ", " sleeping, ", " stopped, ",
 142         " zombie, ",
 143         NULL
 144 };
 145
 146 /* these are for detailing the cpu states */
 147 #define CPU_STATES 5
 148 int *cpu_states;
 149 char *cpustatenames[CPU_STATES + 1] = {
 150         "user", "nice", "system", "interrupt", "idle", NULL
 151 };
 152
 153 /* these are for detailing the memory statistics */
 154
 155 long memory_stats[7];
 156 char *memorynames[] = {
 157         "K Active, ", "K Inact, ", "K Wired, ", "K Cache, ", "K Buf, ", "K Free",
 158         NULL
 159 };
 160
 161 long swap_stats[7];
 162 char *swapnames[] = {
 163         /* 0           1            2           3            4       5 */
 164         "K Total, ", "K Used, ", "K Free, ", "% Inuse, ", "K In, ", "K Out",
 165         NULL
 166 };
 167
 168
 169 /* these are for keeping track of the proc array */
 170
 171 static int nproc;
 172 static int onproc = -1;
 173 static int pref_len;
 174 static struct kinfo_proc *pbase;
 175 static struct kinfo_proc **pref;
 176
 177 /* these are for getting the memory statistics */
 178
 179 static int pageshift;           /* log base 2 of the pagesize */
 180
 181 /* define pagetok in terms of pageshift */
 182
 183 #define pagetok(size) ((size) << pageshift)
 184
 185 /* sorting orders. first is default */
 186 char *ordernames[] = {
 187         "cpu", "size", "res", "time", "pri", "thr", NULL
 188 };
 189
 190 /* compare routines */
 191 int proc_compare(), compare_size(), compare_res(), compare_time(), compare_prio(), compare_thr();
 192
 193 int (*proc_compares[]) () = {
 194         proc_compare,
 195         compare_size,
 196         compare_res,
 197         compare_time,
 198         compare_prio,
 199         NULL
 200 };
 201
 202 static void
 203 cputime_percentages(int out[CPU_STATES], struct kinfo_cputime *new,
 204     struct kinfo_cputime *old)
 205 {
 206         struct kinfo_cputime diffs;
 207         uint64_t total_change, half_total;
 208
 209         /* initialization */
 210         total_change = 0;
 211
 212         diffs.cp_user = new->cp_user - old->cp_user;
 213         diffs.cp_nice = new->cp_nice - old->cp_nice;
 214         diffs.cp_sys = new->cp_sys - old->cp_sys;
 215         diffs.cp_intr = new->cp_intr - old->cp_intr;
 216         diffs.cp_idle = new->cp_idle - old->cp_idle;
 217         total_change = diffs.cp_user + diffs.cp_nice + diffs.cp_sys +
 218             diffs.cp_intr + diffs.cp_idle;
 219         old->cp_user = new->cp_user;
 220         old->cp_nice = new->cp_nice;
 221         old->cp_sys = new->cp_sys;
 222         old->cp_intr = new->cp_intr;
 223         old->cp_idle = new->cp_idle;
 224
 225         /* avoid divide by zero potential */
 226         if (total_change == 0)
 227                 total_change = 1;
 228
 229         /* calculate percentages based on overall change, rounding up */
 230         half_total = total_change >> 1;
 231
 232         out[0] = ((diffs.cp_user * 1000LL + half_total) / total_change);
 233         out[1] = ((diffs.cp_nice * 1000LL + half_total) / total_change);
 234         out[2] = ((diffs.cp_sys * 1000LL + half_total) / total_change);
 235         out[3] = ((diffs.cp_intr * 1000LL + half_total) / total_change);
 236         out[4] = ((diffs.cp_idle * 1000LL + half_total) / total_change);
 237 }
 238
 239 int
 240 machine_init(struct statics *statics)
 241 {
 242         int pagesize;
 243         size_t modelen;
 244         struct passwd *pw;
 245         struct timeval boottime;
 246
 247         if (n_cpus < 1) {
 248                 if (kinfo_get_cpus(&n_cpus))
 249                         err(1, "kinfo_get_cpus failed");
 250         }
 251         /* get boot time */
 252         modelen = sizeof(boottime);
 253         if (sysctlbyname("kern.boottime", &boottime, &modelen, NULL, 0) == -1) {
 254                 /* we have no boottime to report */
 255                 boottime.tv_sec = -1;
 256         }
 257         modelen = sizeof(smpmode);
 258         if ((sysctlbyname("machdep.smp_active", &smpmode, &modelen, NULL, 0) < 0 &&
 259             sysctlbyname("smp.smp_active", &smpmode, &modelen, NULL, 0) < 0) ||
 260             modelen != sizeof(smpmode))
 261                 smpmode = 0;
 262
 263         while ((pw = getpwent()) != NULL) {
 264                 if ((int)strlen(pw->pw_name) > namelength)
 265                         namelength = strlen(pw->pw_name);
 266         }
 267         if (namelength < 8)
 268                 namelength = 8;
 269         if (smpmode && namelength > 13)
 270                 namelength = 13;
 271         else if (namelength > 15)
 272                 namelength = 15;
 273
 274         if ((kd = kvm_open(NULL, NULL, NULL, O_RDONLY, "kvm_open")) == NULL)
 275                 return -1;
 276
 277         if (kinfo_get_sched_ccpu(&ccpu)) {
 278                 fprintf(stderr, "top: kinfo_get_sched_ccpu failed\n");
 279                 return (-1);
 280         }
 281         /* this is used in calculating WCPU -- calculate it ahead of time */
 282         logcpu = log(loaddouble(ccpu));
 283
 284         pbase = NULL;
 285         pref = NULL;
 286         nproc = 0;
 287         onproc = -1;
 288         /*
 289          * get the page size with "getpagesize" and calculate pageshift from
 290          * it
 291          */
 292         pagesize = getpagesize();
 293         pageshift = 0;
 294         while (pagesize > 1) {
 295                 pageshift++;
 296                 pagesize >>= 1;
 297         }
 298
 299         /* we only need the amount of log(2)1024 for our conversion */
 300         pageshift -= LOG1024;
 301
 302         /* fill in the statics information */
 303         statics->procstate_names = procstatenames;
 304         statics->cpustate_names = cpustatenames;
 305         statics->memory_names = memorynames;
 306         statics->boottime = boottime.tv_sec;
 307         statics->swap_names = swapnames;
 308         statics->order_names = ordernames;
 309
 310         /* all done! */
 311         return (0);
 312 }
 313
 314 char *
 315 format_header(char *uname_field)
 316 {
 317         static char Header[128];
 318
 319         snprintf(Header, sizeof(Header), smpmode ? smp_header : up_header,
 320             namelength, namelength, uname_field);
 321
 322         if (screen_width <= 79)
 323                 cmdlength = 80;
 324         else
 325                 cmdlength = 89;
 326
 327         cmdlength = cmdlength - strlen(Header) + 6;
 328
 329         return Header;
 330 }
 331
 332 static int swappgsin = -1;
 333 static int swappgsout = -1;
 334 extern struct timeval timeout;
 335
 336 void
 337 get_system_info(struct system_info *si)
 338 {
 339         size_t len;
 340         int cpu;
 341
 342         if (cpu_states == NULL) {
 343                 cpu_states = malloc(sizeof(*cpu_states) * CPU_STATES * n_cpus);
 344                 if (cpu_states == NULL)
 345                         err(1, "malloc");
 346                 bzero(cpu_states, sizeof(*cpu_states) * CPU_STATES * n_cpus);
 347         }
 348         if (cp_time == NULL) {
 349                 cp_time = malloc(2 * n_cpus * sizeof(cp_time[0]));
 350                 if (cp_time == NULL)
 351                         err(1, "cp_time");
 352                 cp_old = cp_time + n_cpus;
 353
 354                 len = n_cpus * sizeof(cp_old[0]);
 355                 bzero(cp_time, len);
 356                 if (sysctlbyname("kern.cputime", cp_old, &len, NULL, 0))
 357                         err(1, "kern.cputime");
 358         }
 359         len = n_cpus * sizeof(cp_time[0]);
 360         bzero(cp_time, len);
 361         if (sysctlbyname("kern.cputime", cp_time, &len, NULL, 0))
 362                 err(1, "kern.cputime");
 363
 364         getloadavg(si->load_avg, 3);
 365
 366         lastpid = 0;
 367
 368         /* convert cp_time counts to percentages */
 369         for (cpu = 0; cpu < n_cpus; ++cpu) {
 370                 cputime_percentages(cpu_states + cpu * CPU_STATES,
 371                     &cp_time[cpu], &cp_old[cpu]);
 372         }
 373
 374         /* sum memory & swap statistics */
 375         {
 376                 struct vmmeter vmm;
 377                 struct vmstats vms;
 378                 size_t vms_size = sizeof(vms);
 379                 size_t vmm_size = sizeof(vmm);
 380                 static unsigned int swap_delay = 0;
 381                 static int swapavail = 0;
 382                 static int swapfree = 0;
 383                 static int bufspace = 0;
 384
 385                 if (sysctlbyname("vm.vmstats", &vms, &vms_size, NULL, 0))
 386                         err(1, "sysctlbyname: vm.vmstats");
 387
 388                 if (sysctlbyname("vm.vmmeter", &vmm, &vmm_size, NULL, 0))
 389                         err(1, "sysctlbyname: vm.vmmeter");
 390
 391                 if (kinfo_get_vfs_bufspace(&bufspace))
 392                         err(1, "kinfo_get_vfs_bufspace");
 393
 394                 /* convert memory stats to Kbytes */
 395                 memory_stats[0] = pagetok(vms.v_active_count);
 396                 memory_stats[1] = pagetok(vms.v_inactive_count);
 397                 memory_stats[2] = pagetok(vms.v_wire_count);
 398                 memory_stats[3] = pagetok(vms.v_cache_count);
 399                 memory_stats[4] = bufspace / 1024;
 400                 memory_stats[5] = pagetok(vms.v_free_count);
 401                 memory_stats[6] = -1;
 402
 403                 /* first interval */
 404                 if (swappgsin < 0) {
 405                         swap_stats[4] = 0;
 406                         swap_stats[5] = 0;
 407                 }
 408                 /* compute differences between old and new swap statistic */
 409                 else {
 410                         swap_stats[4] = pagetok(((vmm.v_swappgsin - swappgsin)));
 411                         swap_stats[5] = pagetok(((vmm.v_swappgsout - swappgsout)));
 412                 }
 413
 414                 swappgsin = vmm.v_swappgsin;
 415                 swappgsout = vmm.v_swappgsout;
 416
 417                 /* call CPU heavy swapmode() only for changes */
 418                 if (swap_stats[4] > 0 || swap_stats[5] > 0 || swap_delay == 0) {
 419                         swap_stats[3] = swapmode(&swapavail, &swapfree);
 420                         swap_stats[0] = swapavail;
 421                         swap_stats[1] = swapavail - swapfree;
 422                         swap_stats[2] = swapfree;
 423                 }
 424                 swap_delay = 1;
 425                 swap_stats[6] = -1;
 426         }
 427
 428         /* set arrays and strings */
 429         si->cpustates = cpu_states;
 430         si->memory = memory_stats;
 431         si->swap = swap_stats;
 432
 433
 434         if (lastpid > 0) {
 435                 si->last_pid = lastpid;
 436         } else {
 437                 si->last_pid = -1;
 438         }
 439 }
 440
 441
 442 static struct handle handle;
 443
 444 caddr_t
 445 get_process_info(struct system_info *si, struct process_select *sel,
 446     int compare_index)
 447 {
 448         int i;
 449         int total_procs;
 450         int active_procs;
 451         struct kinfo_proc **prefp;
 452         struct kinfo_proc *pp;
 453
 454         /* these are copied out of sel for speed */
 455         int show_idle;
 456         int show_system;
 457         int show_uid;
 458
 459
 460         pbase = kvm_getprocs(kd, KERN_PROC_ALL, 0, &nproc);
 461         if (nproc > onproc)
 462                 pref = (struct kinfo_proc **)realloc(pref, sizeof(struct kinfo_proc *)
 463                     * (onproc = nproc));
 464         if (pref == NULL || pbase == NULL) {
 465                 (void)fprintf(stderr, "top: Out of memory.\n");
 466                 quit(23);
 467         }
 468         /* get a pointer to the states summary array */
 469         si->procstates = process_states;
 470
 471         /* set up flags which define what we are going to select */
 472         show_idle = sel->idle;
 473         show_system = sel->system;
 474         show_uid = sel->uid != -1;
 475
 476         /* count up process states and get pointers to interesting procs */
 477         total_procs = 0;
 478         active_procs = 0;
 479         memset((char *)process_states, 0, sizeof(process_states));
 480         prefp = pref;
 481         for (pp = pbase, i = 0; i < nproc; pp++, i++) {
 482                 /*
 483                  * Place pointers to each valid proc structure in pref[].
 484                  * Process slots that are actually in use have a non-zero
 485                  * status field.  Processes with P_SYSTEM set are system
 486                  * processes---these get ignored unless show_sysprocs is set.
 487                  */
 488                 if ((show_threads && (LP(pp, pid) == -1)) ||
 489                     (show_system || ((PP(pp, flags) & P_SYSTEM) == 0))) {
 490                         total_procs++;
 491                         process_states[(unsigned char)PP(pp, stat)]++;
 492                         if ((show_threads && (LP(pp, pid) == -1)) ||
 493                             (show_idle || (LP(pp, pctcpu) != 0) ||
 494                             (LP(pp, stat) == LSRUN)) &&
 495                             (!show_uid || PP(pp, ruid) == (uid_t) sel->uid)) {
 496                                 *prefp++ = pp;
 497                                 active_procs++;
 498                         }
 499                 }
 500         }
 501
 502         qsort((char *)pref, active_procs, sizeof(struct kinfo_proc *),
 503             proc_compares[compare_index]);
 504
 505         /* remember active and total counts */
 506         si->p_total = total_procs;
 507         si->p_active = pref_len = active_procs;
 508
 509         /* pass back a handle */
 510         handle.next_proc = pref;
 511         handle.remaining = active_procs;
 512         return ((caddr_t) & handle);
 513 }
 514
 515 char fmt[128];                  /* static area where result is built */
 516
 517 char *
 518 format_next_process(caddr_t xhandle, char *(*get_userid) (int))
 519 {
 520         struct kinfo_proc *pp;
 521         long cputime;
 522         double pct;
 523         struct handle *hp;
 524         char status[16];
 525         char const *wrapper;
 526         int state;
 527         int xnice;
 528
 529         /* find and remember the next proc structure */
 530         hp = (struct handle *)xhandle;
 531         pp = *(hp->next_proc++);
 532         hp->remaining--;
 533
 534         /* set the wrapper for the process/thread name */
 535         if ((PP(pp, flags) & P_SWAPPEDOUT))
 536                 wrapper = "[]"; /* swapped process [pname] */
 537         else if (((PP(pp, flags) & P_SYSTEM) != 0) && (LP(pp, pid) > 0))
 538                 wrapper = "()"; /* system process (pname) */
 539         else if (show_threads && (LP(pp, pid) == -1))
 540                 wrapper = "<>"; /* pure kernel threads <thread> */
 541         else
 542                 wrapper = NULL;
 543
 544         /* get the process's command name */
 545         if (wrapper != NULL) {
 546                 char *comm = PP(pp, comm);
 547 #define COMSIZ sizeof(PP(pp, comm))
 548                 char buf[COMSIZ];
 549                 (void)strncpy(buf, comm, COMSIZ);
 550                 comm[0] = wrapper[0];
 551                 (void)strncpy(&comm[1], buf, COMSIZ - 2);
 552                 comm[COMSIZ - 2] = '\0';
 553                 (void)strncat(comm, &wrapper[1], COMSIZ - 1);
 554                 comm[COMSIZ - 1] = '\0';
 555         }
 556         /*
 557          * Convert the process's runtime from microseconds to seconds.  This
 558          * time includes the interrupt time although that is not wanted here.
 559          * ps(1) is similarly sloppy.
 560          */
 561         cputime = (LP(pp, uticks) + LP(pp, sticks)) / 1000000;
 562
 563         /* calculate the base for cpu percentages */
 564         pct = pctdouble(LP(pp, pctcpu));
 565
 566         /* generate "STATE" field */
 567         switch (state = LP(pp, stat)) {
 568         case LSRUN:
 569                 if (smpmode && LP(pp, tdflags) & TDF_RUNNING)
 570                         sprintf(status, "CPU%d", LP(pp, cpuid));
 571                 else
 572                         strcpy(status, "RUN");
 573                 break;
 574         case LSSLEEP:
 575                 if (LP(pp, wmesg) != NULL) {
 576                         sprintf(status, "%.6s", LP(pp, wmesg));
 577                         break;
 578                 }
 579                 /* fall through */
 580         default:
 581
 582                 if (state >= 0 &&
 583                     (unsigned)state < sizeof(state_abbrev) / sizeof(*state_abbrev))
 584                         sprintf(status, "%.6s", state_abbrev[(unsigned char)state]);
 585                 else
 586                         sprintf(status, "?%5d", state);
 587                 break;
 588         }
 589
 590         if (PP(pp, stat) == SZOMB)
 591                 strcpy(status, "ZOMB");
 592
 593         /*
 594          * idle time 0 - 31 -> nice value +21 - +52 normal time      -> nice
 595          * value -20 - +20 real time 0 - 31 -> nice value -52 - -21 thread
 596          * 0 - 31 -> nice value -53 -
 597          */
 598         switch (LP(pp, rtprio.type)) {
 599         case RTP_PRIO_REALTIME:
 600                 xnice = PRIO_MIN - 1 - RTP_PRIO_MAX + LP(pp, rtprio.prio);
 601                 break;
 602         case RTP_PRIO_IDLE:
 603                 xnice = PRIO_MAX + 1 + LP(pp, rtprio.prio);
 604                 break;
 605         case RTP_PRIO_THREAD:
 606                 xnice = PRIO_MIN - 1 - RTP_PRIO_MAX - LP(pp, rtprio.prio);
 607                 break;
 608         default:
 609                 xnice = PP(pp, nice);
 610                 break;
 611         }
 612
 613         /* format this entry */
 614         snprintf(fmt, sizeof(fmt),
 615             smpmode ? smp_Proc_format : up_Proc_format,
 616             (int)PP(pp, pid),
 617             namelength, namelength,
 618             get_userid(PP(pp, ruid)),
 619             (int)((show_threads && (LP(pp, pid) == -1)) ?
 620             LP(pp, tdprio) : LP(pp, prio)),
 621             (int)xnice,
 622             format_k(PROCSIZE(pp)),
 623             format_k(pagetok(VP(pp, rssize))),
 624             status,
 625             (int)(smpmode ? LP(pp, cpuid) : 0),
 626             format_time(cputime),
 627             100.0 * weighted_cpu(pct, pp),
 628             100.0 * pct,
 629             cmdlength,
 630             printable(PP(pp, comm)));
 631
 632         /* return the result */
 633         return (fmt);
 634 }
 635
 636 /* comparison routines for qsort */
 637
 638 /*
 639  *  proc_compare - comparison function for "qsort"
 640  *      Compares the resource consumption of two processes using five
 641  *      distinct keys.  The keys (in descending order of importance) are:
 642  *      percent cpu, cpu ticks, state, resident set size, total virtual
 643  *      memory usage.  The process states are ordered as follows (from least
 644  *      to most important):  WAIT, zombie, sleep, stop, start, run.  The
 645  *      array declaration below maps a process state index into a number
 646  *      that reflects this ordering.
 647  */
 648
 649 static unsigned char sorted_state[] =
 650 {
 651         0,                      /* not used              */
 652         3,                      /* sleep                 */
 653         1,                      /* ABANDONED (WAIT)      */
 654         6,                      /* run                   */
 655         5,                      /* start                 */
 656         2,                      /* zombie                */
 657         4                       /* stop                  */
 658 };
 659
 660
 661 #define ORDERKEY_PCTCPU \
 662   if (lresult = (long) LP(p2, pctcpu) - (long) LP(p1, pctcpu), \
 663      (result = lresult > 0 ? 1 : lresult < 0 ? -1 : 0) == 0)
 664
 665 #define CPTICKS(p)      (LP(p, uticks) + LP(p, sticks))
 666
 667 #define ORDERKEY_CPTICKS \
 668   if ((result = CPTICKS(p2) > CPTICKS(p1) ? 1 : \
 669                 CPTICKS(p2) < CPTICKS(p1) ? -1 : 0) == 0)
 670
 671 #define ORDERKEY_STATE \
 672   if ((result = sorted_state[(unsigned char) PP(p2, stat)] - \
 673                 sorted_state[(unsigned char) PP(p1, stat)]) == 0)
 674
 675 #define ORDERKEY_PRIO \
 676   if ((result = LP(p2, prio) - LP(p1, prio)) == 0)
 677
 678 #define ORDERKEY_KTHREADS \
 679   if ((result = (LP(p1, pid) == 0) - (LP(p2, pid) == 0)) == 0)
 680
 681 #define ORDERKEY_KTHREADS_PRIO \
 682   if ((result = LP(p2, tdprio) - LP(p1, tdprio)) == 0)
 683
 684 #define ORDERKEY_RSSIZE \
 685   if ((result = VP(p2, rssize) - VP(p1, rssize)) == 0)
 686
 687 #define ORDERKEY_MEM \
 688   if ( (result = PROCSIZE(p2) - PROCSIZE(p1)) == 0 )
 689
 690 /* compare_cpu - the comparison function for sorting by cpu percentage */
 691
 692 int
 693 proc_compare(const void *arg1, const void *arg2)
 694 {
 695         const struct proc *const *pp1 = arg1;
 696         const struct proc *const *pp2 = arg2;
 697         const struct kinfo_proc *p1;
 698         const struct kinfo_proc *p2;
 699         int result;
 700         pctcpu lresult;
 701
 702         /* remove one level of indirection */
 703         p1 = *(const struct kinfo_proc *const *)pp1;
 704         p2 = *(const struct kinfo_proc *const *)pp2;
 705
 706         ORDERKEY_PCTCPU
 707         ORDERKEY_CPTICKS
 708         ORDERKEY_STATE
 709         ORDERKEY_PRIO
 710         ORDERKEY_RSSIZE
 711         ORDERKEY_MEM
 712         {}
 713
 714         return (result);
 715 }
 716
 717 /* compare_size - the comparison function for sorting by total memory usage */
 718
 719 int
 720 compare_size(const void *arg1, const void *arg2)
 721 {
 722         struct proc *const *pp1 = arg1;
 723         struct proc *const *pp2 = arg2;
 724         struct kinfo_proc *p1;
 725         struct kinfo_proc *p2;
 726         int result;
 727         pctcpu lresult;
 728
 729         /* remove one level of indirection */
 730         p1 = *(struct kinfo_proc *const *)pp1;
 731         p2 = *(struct kinfo_proc *const *)pp2;
 732
 733         ORDERKEY_MEM
 734         ORDERKEY_RSSIZE
 735         ORDERKEY_PCTCPU
 736         ORDERKEY_CPTICKS
 737         ORDERKEY_STATE
 738         ORDERKEY_PRIO
 739         {}
 740
 741         return (result);
 742 }
 743
 744 /* compare_res - the comparison function for sorting by resident set size */
 745
 746 int
 747 compare_res(const void *arg1, const void *arg2)
 748 {
 749         struct proc *const *pp1 = arg1;
 750         struct proc *const *pp2 = arg2;
 751         struct kinfo_proc *p1;
 752         struct kinfo_proc *p2;
 753         int result;
 754         pctcpu lresult;
 755
 756         /* remove one level of indirection */
 757         p1 = *(struct kinfo_proc *const *)pp1;
 758         p2 = *(struct kinfo_proc *const *)pp2;
 759
 760         ORDERKEY_RSSIZE
 761         ORDERKEY_MEM
 762         ORDERKEY_PCTCPU
 763         ORDERKEY_CPTICKS
 764         ORDERKEY_STATE
 765         ORDERKEY_PRIO
 766         {}
 767
 768         return (result);
 769 }
 770
 771 /* compare_time - the comparison function for sorting by total cpu time */
 772
 773 int
 774 compare_time(const void *arg1, const void *arg2)
 775 {
 776         struct proc *const *pp1 = arg1;
 777         struct proc *const *pp2 = arg2;
 778         const struct kinfo_proc *p1;
 779         const struct kinfo_proc *p2;
 780         int result;
 781         pctcpu lresult;
 782
 783         /* remove one level of indirection */
 784         p1 = *(struct kinfo_proc *const *)pp1;
 785         p2 = *(struct kinfo_proc *const *)pp2;
 786
 787         ORDERKEY_CPTICKS
 788         ORDERKEY_PCTCPU
 789         ORDERKEY_KTHREADS
 790         ORDERKEY_KTHREADS_PRIO
 791         ORDERKEY_STATE
 792         ORDERKEY_PRIO
 793         ORDERKEY_RSSIZE
 794         ORDERKEY_MEM
 795         {}
 796
 797         return (result);
 798 }
 799
 800 /* compare_prio - the comparison function for sorting by cpu percentage */
 801
 802 int
 803 compare_prio(const void *arg1, const void *arg2)
 804 {
 805         struct proc *const *pp1 = arg1;
 806         struct proc *const *pp2 = arg2;
 807         const struct kinfo_proc *p1;
 808         const struct kinfo_proc *p2;
 809         int result;
 810         pctcpu lresult;
 811
 812         /* remove one level of indirection */
 813         p1 = *(struct kinfo_proc *const *)pp1;
 814         p2 = *(struct kinfo_proc *const *)pp2;
 815
 816         ORDERKEY_KTHREADS
 817         ORDERKEY_KTHREADS_PRIO
 818         ORDERKEY_PRIO
 819         ORDERKEY_CPTICKS
 820         ORDERKEY_PCTCPU
 821         ORDERKEY_STATE
 822         ORDERKEY_RSSIZE
 823         ORDERKEY_MEM
 824         {}
 825
 826         return (result);
 827 }
 828
 829 int
 830 compare_thr(const void *arg1, const void *arg2)
 831 {
 832         struct proc *const *pp1 = arg1;
 833         struct proc *const *pp2 = arg2;
 834         const struct kinfo_proc *p1;
 835         const struct kinfo_proc *p2;
 836         int result;
 837         pctcpu lresult;
 838
 839         /* remove one level of indirection */
 840         p1 = *(struct kinfo_proc *const *)pp1;
 841         p2 = *(struct kinfo_proc *const *)pp2;
 842
 843         ORDERKEY_KTHREADS
 844         ORDERKEY_KTHREADS_PRIO
 845         ORDERKEY_CPTICKS
 846         ORDERKEY_PCTCPU
 847         ORDERKEY_STATE
 848         ORDERKEY_RSSIZE
 849         ORDERKEY_MEM
 850         {}
 851
 852         return (result);
 853 }
 854
 855 /*
 856  * proc_owner(pid) - returns the uid that owns process "pid", or -1 if
 857  *              the process does not exist.
 858  *              It is EXTREMLY IMPORTANT that this function work correctly.
 859  *              If top runs setuid root (as in SVR4), then this function
 860  *              is the only thing that stands in the way of a serious
 861  *              security problem.  It validates requests for the "kill"
 862  *              and "renice" commands.
 863  */
 864
 865 int
 866 proc_owner(int pid)
 867 {
 868         int xcnt;
 869         struct kinfo_proc **prefp;
 870         struct kinfo_proc *pp;
 871
 872         prefp = pref;
 873         xcnt = pref_len;
 874         while (--xcnt >= 0) {
 875                 pp = *prefp++;
 876                 if (PP(pp, pid) == (pid_t) pid) {
 877                         return ((int)PP(pp, ruid));
 878                 }
 879         }
 880         return (-1);
 881 }
 882
 883
 884 /*
 885  * swapmode is based on a program called swapinfo written
 886  * by Kevin Lahey <kml@rokkaku.atl.ga.us>.
 887  */
 888 int
 889 swapmode(int *retavail, int *retfree)
 890 {
 891         int n;
 892         int pagesize = getpagesize();
 893         struct kvm_swap swapary[1];
 894
 895         *retavail = 0;
 896         *retfree = 0;
 897
 898 #define CONVERT(v)      ((quad_t)(v) * pagesize / 1024)
 899
 900         n = kvm_getswapinfo(kd, swapary, 1, 0);
 901         if (n < 0 || swapary[0].ksw_total == 0)
 902                 return (0);
 903
 904         *retavail = CONVERT(swapary[0].ksw_total);
 905         *retfree = CONVERT(swapary[0].ksw_total - swapary[0].ksw_used);
 906
 907         n = (int)((double)swapary[0].ksw_used * 100.0 /
 908             (double)swapary[0].ksw_total);
 909         return (n);
 910 }