usr.bin/top/machine.c

   1 /*
   2  * top - a top users display for Unix
   3  *
   4  * SYNOPSIS:  For FreeBSD-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 FreeBSD 2.2
  13  * Works for:
  14  *      FreeBSD 2.2.x, 3.x, 4.x, and probably FreeBSD 2.1.x
  15  *
  16  * LIBS: -lkvm
  17  *
  18  * AUTHOR:  Christos Zoulas <christos@ee.cornell.edu>
  19  *          Steven Wallace  <swallace@freebsd.org>
  20  *          Wolfram Schneider <wosch@FreeBSD.org>
  21  *          Hiten Pandya <hmp@backplane.com>
  22  *
  23  * $FreeBSD: src/usr.bin/top/machine.c,v 1.29.2.2 2001/07/31 20:27:05 tmm Exp $
  24  * $DragonFly: src/usr.bin/top/machine.c,v 1.18 2005/11/14 18:50:18 dillon Exp $
  25  */
  26
  27
  28 #include <sys/time.h>
  29 #include <sys/types.h>
  30 #include <sys/signal.h>
  31 #include <sys/param.h>
  32
  33 #include "os.h"
  34 #include <err.h>
  35 #include <kvm.h>
  36 #include <stdio.h>
  37 #include <math.h>
  38 #include <pwd.h>
  39 #include <sys/errno.h>
  40 #include <sys/sysctl.h>
  41 #include <sys/file.h>
  42 #include <sys/time.h>
  43 #include <sys/user.h>
  44 #include <sys/vmmeter.h>
  45 #include <sys/resource.h>
  46 #include <sys/rtprio.h>
  47
  48 /* Swap */
  49 #include <stdlib.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 "machine.h"
  58
  59 static int check_nlist(struct nlist *);
  60 static int getkval(unsigned long, int *, int, char *);
  61 extern char* printable(char *);
  62 int swapmode(int *retavail, int *retfree);
  63 static int smpmode;
  64 static int namelength;
  65 static int cmdlength;
  66
  67 /*
  68  * needs to be a global symbol, so wrapper can be
  69  * modified accordingly.
  70  */
  71 static int show_threads = 0;
  72
  73 /* get_process_info passes back a handle.  This is what it looks like: */
  74
  75 struct handle
  76 {
  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_proc . field)
  85 #define EP(pp, field) ((pp)->kp_eproc . field)
  86 #define TP(pp, field) ((pp)->kp_thread . field)
  87 #define VP(pp, field) ((pp)->kp_eproc.e_vm . field)
  88
  89 /* define what weighted cpu is.  */
  90 #define weighted_cpu(pct, pp) (PP((pp), p_swtime) == 0 ? 0.0 : \
  91                          ((pct) / (1.0 - exp(PP((pp), p_swtime) * logcpu))))
  92
  93 /* what we consider to be process size: */
  94 #define PROCSIZE(pp) (VP((pp), vm_map.size) / 1024)
  95
  96 /*
  97  *  These definitions control the format of the per-process area
  98  */
  99
 100 static char smp_header[] =
 101   "  PID %-*.*s PRI NICE  SIZE    RES STATE  C   TIME   WCPU    CPU COMMAND";
 102
 103 #define smp_Proc_format \
 104         "%5d %-*.*s %3d %3d%7s %6s %-6.6s %1x%7s %5.2f%% %5.2f%% %.*s"
 105
 106 static char up_header[] =
 107   "  PID %-*.*s PRI NICE  SIZE    RES STATE    TIME   WCPU    CPU COMMAND";
 108
 109 #define up_Proc_format \
 110         "%5d %-*.*s %3d %3d%7s %6s %-6.6s%.0d%7s %5.2f%% %5.2f%% %.*s"
 111
 112
 113
 114 /* process state names for the "STATE" column of the display */
 115 /* the extra nulls in the string "run" are for adding a slash and
 116    the processor number when needed */
 117
 118 char *state_abbrev[] =
 119 {
 120     "", "START", "RUN\0\0\0", "SLEEP", "STOP", "ZOMB",
 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 long cnt;
 132 static int ccpu;
 133
 134 /* these are for calculating cpu state percentages */
 135
 136 static struct kinfo_cputime cp_time, cp_old;
 137
 138 /* these are for detailing the process states */
 139
 140 int process_states[6];
 141 char *procstatenames[] = {
 142     "", " starting, ", " running, ", " sleeping, ", " stopped, ",
 143     " zombie, ",
 144     NULL
 145 };
 146
 147 /* these are for detailing the cpu states */
 148 #define CPU_STATES 5
 149 int cpu_states[CPU_STATES];
 150 char *cpustatenames[CPU_STATES + 1] = {
 151     "user", "nice", "system", "interrupt", "idle", NULL
 152 };
 153
 154 /* these are for detailing the memory statistics */
 155
 156 int memory_stats[7];
 157 char *memorynames[] = {
 158     "K Active, ", "K Inact, ", "K Wired, ", "K Cache, ", "K Buf, ", "K Free",
 159     NULL
 160 };
 161
 162 int swap_stats[7];
 163 char *swapnames[] = {
 164 /*   0           1            2           3            4       5 */
 165     "K Total, ", "K Used, ", "K Free, ", "% Inuse, ", "K In, ", "K Out",
 166     NULL
 167 };
 168
 169
 170 /* these are for keeping track of the proc array */
 171
 172 static int nproc;
 173 static int onproc = -1;
 174 static int pref_len;
 175 static struct kinfo_proc *pbase;
 176 static struct kinfo_proc **pref;
 177
 178 /* these are for getting the memory statistics */
 179
 180 static int pageshift;           /* log base 2 of the pagesize */
 181
 182 /* define pagetok in terms of pageshift */
 183
 184 #define pagetok(size) ((size) << pageshift)
 185
 186 #ifdef ORDER
 187 /* sorting orders. first is default */
 188 char *ordernames[] = {
 189     "cpu", "size", "res", "time", "pri", "thr", NULL
 190 };
 191 #endif
 192
 193 static void
 194 cputime_percentages(int out[CPU_STATES], struct kinfo_cputime *new,
 195                     struct kinfo_cputime *old)
 196 {
 197         struct kinfo_cputime diffs;
 198         int i;
 199         uint64_t total_change, half_total;
 200
 201         /* initialization */
 202         total_change = 0;
 203
 204         diffs.cp_user = new->cp_user - old->cp_user;
 205         diffs.cp_nice = new->cp_nice - old->cp_nice;
 206         diffs.cp_sys = new->cp_sys - old->cp_sys;
 207         diffs.cp_intr = new->cp_intr - old->cp_intr;
 208         diffs.cp_idle = new->cp_idle - old->cp_idle;
 209         total_change = diffs.cp_user + diffs.cp_nice + diffs.cp_sys +
 210             diffs.cp_intr + diffs.cp_idle;
 211         old->cp_user = new->cp_user;
 212         old->cp_nice = new->cp_nice;
 213         old->cp_sys = new->cp_sys;
 214         old->cp_intr = new->cp_intr;
 215         old->cp_idle = new->cp_idle;
 216
 217         /* avoid divide by zero potential */
 218         if (total_change == 0)
 219                 total_change = 1;
 220
 221         /* calculate percentages based on overall change, rounding up */
 222         half_total = total_change >> 1;
 223
 224         out[0] = ((diffs.cp_user * 1000LL + half_total) / total_change);
 225         out[1] = ((diffs.cp_nice * 1000LL + half_total) / total_change);
 226         out[2] = ((diffs.cp_sys * 1000LL + half_total) / total_change);
 227         out[3] = ((diffs.cp_intr * 1000LL + half_total) / total_change);
 228         out[4] = ((diffs.cp_idle * 1000LL + half_total) / total_change);
 229 }
 230
 231 int
 232 machine_init(struct statics *statics)
 233 {
 234     register int i = 0;
 235     register int pagesize;
 236     size_t modelen;
 237     struct passwd *pw;
 238
 239     modelen = sizeof(smpmode);
 240     if ((sysctlbyname("machdep.smp_active", &smpmode, &modelen, NULL, 0) < 0 &&
 241          sysctlbyname("smp.smp_active", &smpmode, &modelen, NULL, 0) < 0) ||
 242         modelen != sizeof(smpmode))
 243             smpmode = 0;
 244
 245     while ((pw = getpwent()) != NULL) {
 246         if (strlen(pw->pw_name) > namelength)
 247             namelength = strlen(pw->pw_name);
 248     }
 249     if (namelength < 8)
 250         namelength = 8;
 251     if (smpmode && namelength > 13)
 252         namelength = 13;
 253     else if (namelength > 15)
 254         namelength = 15;
 255
 256     if ((kd = kvm_open(NULL, NULL, NULL, O_RDONLY, "kvm_open")) == NULL)
 257         return -1;
 258
 259     if (kinfo_get_sched_ccpu(&ccpu)) {
 260         fprintf(stderr, "top: kinfo_get_sched_ccpu failed\n");
 261         return(-1);
 262     }
 263
 264     /* this is used in calculating WCPU -- calculate it ahead of time */
 265     logcpu = log(loaddouble(ccpu));
 266
 267     pbase = NULL;
 268     pref = NULL;
 269     nproc = 0;
 270     onproc = -1;
 271     /* get the page size with "getpagesize" and calculate pageshift from it */
 272     pagesize = getpagesize();
 273     pageshift = 0;
 274     while (pagesize > 1)
 275     {
 276         pageshift++;
 277         pagesize >>= 1;
 278     }
 279
 280     /* we only need the amount of log(2)1024 for our conversion */
 281     pageshift -= LOG1024;
 282
 283     /* fill in the statics information */
 284     statics->procstate_names = procstatenames;
 285     statics->cpustate_names = cpustatenames;
 286     statics->memory_names = memorynames;
 287     statics->swap_names = swapnames;
 288 #ifdef ORDER
 289     statics->order_names = ordernames;
 290 #endif
 291
 292     /* all done! */
 293     return(0);
 294 }
 295
 296 char *format_header(register char *uname_field)
 297 {
 298     register char *ptr;
 299     static char Header[128];
 300
 301     snprintf(Header, sizeof(Header), smpmode ? smp_header : up_header,
 302              namelength, namelength, uname_field);
 303
 304     if (screen_width <= 79)
 305         cmdlength = 80;
 306     else
 307         cmdlength = 89;
 308
 309     cmdlength = cmdlength - strlen(Header) + 6;
 310
 311     return Header;
 312 }
 313
 314 static int swappgsin = -1;
 315 static int swappgsout = -1;
 316 extern struct timeval timeout;
 317
 318 void
 319 get_system_info(struct system_info *si)
 320 {
 321     long total;
 322     int mib[2];
 323     struct timeval boottime;
 324     size_t bt_size;
 325
 326     if (kinfo_get_sched_cputime(&cp_time))
 327         err(1, "kinfo_get_sched_cputime failed");
 328
 329     getloadavg(si->load_avg, 3);
 330
 331     lastpid = 0;
 332
 333     /* convert cp_time counts to percentages */
 334     cputime_percentages(cpu_states, &cp_time, &cp_old);
 335
 336     /* sum memory & swap statistics */
 337     {
 338         struct vmmeter vmm;
 339         struct vmstats vms;
 340         int vms_size = sizeof(vms);
 341         int vmm_size = sizeof(vmm);
 342         static unsigned int swap_delay = 0;
 343         static int swapavail = 0;
 344         static int swapfree = 0;
 345         static int bufspace = 0;
 346
 347         if (sysctlbyname("vm.vmstats", &vms, &vms_size, NULL, 0))
 348                 err(1, "sysctlbyname: vm.vmstats");
 349
 350         if (sysctlbyname("vm.vmmeter", &vmm, &vmm_size, NULL, 0))
 351                 err(1, "sysctlbyname: vm.vmmeter");
 352
 353         if (kinfo_get_vfs_bufspace(&bufspace))
 354                 err(1, "kinfo_get_vfs_bufspace");
 355
 356         /* convert memory stats to Kbytes */
 357         memory_stats[0] = pagetok(vms.v_active_count);
 358         memory_stats[1] = pagetok(vms.v_inactive_count);
 359         memory_stats[2] = pagetok(vms.v_wire_count);
 360         memory_stats[3] = pagetok(vms.v_cache_count);
 361         memory_stats[4] = bufspace / 1024;
 362         memory_stats[5] = pagetok(vms.v_free_count);
 363         memory_stats[6] = -1;
 364
 365         /* first interval */
 366         if (swappgsin < 0) {
 367             swap_stats[4] = 0;
 368             swap_stats[5] = 0;
 369         }
 370
 371         /* compute differences between old and new swap statistic */
 372         else {
 373             swap_stats[4] = pagetok(((vmm.v_swappgsin - swappgsin)));
 374             swap_stats[5] = pagetok(((vmm.v_swappgsout - swappgsout)));
 375         }
 376
 377         swappgsin = vmm.v_swappgsin;
 378         swappgsout = vmm.v_swappgsout;
 379
 380         /* call CPU heavy swapmode() only for changes */
 381         if (swap_stats[4] > 0 || swap_stats[5] > 0 || swap_delay == 0) {
 382             swap_stats[3] = swapmode(&swapavail, &swapfree);
 383             swap_stats[0] = swapavail;
 384             swap_stats[1] = swapavail - swapfree;
 385             swap_stats[2] = swapfree;
 386         }
 387         swap_delay = 1;
 388         swap_stats[6] = -1;
 389     }
 390
 391     /* set arrays and strings */
 392     si->cpustates = cpu_states;
 393     si->memory = memory_stats;
 394     si->swap = swap_stats;
 395
 396
 397     if(lastpid > 0) {
 398         si->last_pid = lastpid;
 399     } else {
 400         si->last_pid = -1;
 401     }
 402
 403     /*
 404      * Print how long system has been up.
 405      * (Found by looking getting "boottime" from the kernel)
 406      */
 407     mib[0] = CTL_KERN;
 408     mib[1] = KERN_BOOTTIME;
 409     bt_size = sizeof(boottime);
 410     if (sysctl(mib, 2, &boottime, &bt_size, NULL, 0) != -1 &&
 411         boottime.tv_sec != 0) {
 412         si->boottime = boottime;
 413     } else {
 414         si->boottime.tv_sec = -1;
 415     }
 416 }
 417
 418 static struct handle handle;
 419
 420 caddr_t get_process_info(struct system_info *si, struct process_select *sel,
 421                          int (*compare)())
 422 {
 423     register int i;
 424     register int total_procs;
 425     register int active_procs;
 426     register struct kinfo_proc **prefp;
 427     register struct kinfo_proc *pp;
 428
 429     /* these are copied out of sel for speed */
 430     int show_idle;
 431     int show_self;
 432     int show_system;
 433     int show_only_threads;
 434     int show_uid;
 435     int show_command;
 436
 437
 438     pbase = kvm_getprocs(kd, KERN_PROC_ALL, 0, &nproc);
 439     if (nproc > onproc)
 440         pref = (struct kinfo_proc **) realloc(pref, sizeof(struct kinfo_proc *)
 441                 * (onproc = nproc));
 442     if (pref == NULL || pbase == NULL) {
 443         (void) fprintf(stderr, "top: Out of memory.\n");
 444         quit(23);
 445     }
 446     /* get a pointer to the states summary array */
 447     si->procstates = process_states;
 448
 449     /* set up flags which define what we are going to select */
 450     show_idle = sel->idle;
 451     show_self = sel->self;
 452     show_system = sel->system;
 453     show_threads = sel->threads;
 454     show_only_threads = sel->only_threads;
 455     show_uid = sel->uid != -1;
 456     show_command = sel->command != NULL;
 457
 458     /* count up process states and get pointers to interesting procs */
 459     total_procs = 0;
 460     active_procs = 0;
 461     memset((char *)process_states, 0, sizeof(process_states));
 462     prefp = pref;
 463     for (pp = pbase, i = 0; i < nproc; pp++, i++)
 464     {
 465         /*
 466          *  Place pointers to each valid proc structure in pref[].
 467          *  Process slots that are actually in use have a non-zero
 468          *  status field.  Processes with P_SYSTEM set are system
 469          *  processes---these get ignored unless show_sysprocs is set.
 470          */
 471         if ((show_threads && (TP(pp, td_proc) == NULL)) ||
 472             (!show_only_threads && (PP(pp, p_stat) != 0 &&
 473             (show_self != PP(pp, p_pid)) &&
 474             (show_system || ((PP(pp, p_flag) & P_SYSTEM) == 0)))))
 475         {
 476             total_procs++;
 477             process_states[(unsigned char) PP(pp, p_stat)]++;
 478             if ((show_threads && (TP(pp, td_proc) == NULL)) ||
 479                 (!show_only_threads && (PP(pp, p_stat) != SZOMB) &&
 480                 (show_idle || (PP(pp, p_pctcpu) != 0) ||
 481                  (PP(pp, p_stat) == SRUN)) &&
 482                 (!show_uid || EP(pp, e_ucred.cr_ruid) == (uid_t)sel->uid)))
 483             {
 484                 *prefp++ = pp;
 485                 active_procs++;
 486             }
 487         }
 488     }
 489
 490     /* if requested, sort the "interesting" processes */
 491     if (compare != NULL)
 492     {
 493         qsort((char *)pref, active_procs, sizeof(struct kinfo_proc *), compare);
 494     }
 495
 496     /* remember active and total counts */
 497     si->p_total = total_procs;
 498     si->p_active = pref_len = active_procs;
 499
 500     /* pass back a handle */
 501     handle.next_proc = pref;
 502     handle.remaining = active_procs;
 503     return((caddr_t)&handle);
 504 }
 505
 506 char fmt[128];          /* static area where result is built */
 507
 508 char *format_next_process(caddr_t handle, char *(*get_userid)())
 509 {
 510     struct kinfo_proc *pp;
 511     long cputime;
 512     double pct;
 513     struct handle *hp;
 514     char status[16];
 515     char const *wrapper;
 516     int state;
 517     int nice;
 518
 519     /* find and remember the next proc structure */
 520     hp = (struct handle *)handle;
 521     pp = *(hp->next_proc++);
 522     hp->remaining--;
 523
 524     /* set the wrapper for the process/thread name */
 525     if ((PP(pp, p_flag) & P_SWAPPEDOUT))
 526          wrapper = "[]"; /* swapped process [pname] */
 527     else if (((PP(pp, p_flag) & P_SYSTEM) != 0) && (TP(pp, td_proc) != NULL))
 528          wrapper = "()"; /* system process (pname) */
 529     else if (show_threads && (TP(pp, td_proc) == NULL))
 530          wrapper = "<>"; /* pure kernel threads <thread> */
 531     else
 532          wrapper = NULL;
 533
 534     /* get the process's command name */
 535     if (wrapper != NULL) {
 536         char *comm = TP(pp, td_comm);
 537 #define COMSIZ sizeof(TP(pp, td_comm))
 538         char buf[COMSIZ];
 539         (void) strncpy(buf, comm, COMSIZ);
 540         comm[0] = wrapper[0];
 541         (void) strncpy(&comm[1], buf, COMSIZ - 2);
 542         comm[COMSIZ - 2] = '\0';
 543         (void) strncat(comm, &wrapper[1], COMSIZ - 1);
 544         comm[COMSIZ - 1] = '\0';
 545     }
 546
 547     /*
 548      * Convert the process's runtime from microseconds to seconds.  This
 549      * time includes the interrupt time although that is not wanted here.
 550      * ps(1) is similarly sloppy.
 551      */
 552     cputime = (EP(pp, e_uticks) + EP(pp, e_sticks)) / 1000000;
 553
 554     /* calculate the base for cpu percentages */
 555     pct = pctdouble(PP(pp, p_pctcpu));
 556
 557     /* generate "STATE" field */
 558     switch (state = PP(pp, p_stat)) {
 559         case SRUN:
 560             if (smpmode && TP(pp, td_flags) & TDF_RUNNING)
 561                 sprintf(status, "CPU%d", EP(pp, e_cpuid));
 562             else
 563                 strcpy(status, "RUN");
 564             break;
 565         case SSLEEP:
 566             if (TP(pp, td_wmesg) != NULL) {
 567                 sprintf(status, "%.6s", EP(pp, e_wmesg));
 568                 break;
 569             }
 570             /* fall through */
 571         default:
 572
 573             if (state >= 0 &&
 574                 state < sizeof(state_abbrev) / sizeof(*state_abbrev))
 575                     sprintf(status, "%.6s", state_abbrev[(unsigned char) state]);
 576             else
 577                     sprintf(status, "?%5d", state);
 578             break;
 579     }
 580
 581     /*
 582      * idle time 0 - 31 -> nice value +21 - +52
 583      * normal time      -> nice value -20 - +20
 584      * real time 0 - 31 -> nice value -52 - -21
 585      * thread    0 - 31 -> nice value -53 -
 586      */
 587     switch(PP(pp, p_rtprio.type)) {
 588     case RTP_PRIO_REALTIME:
 589         nice = PRIO_MIN - 1 - RTP_PRIO_MAX + PP(pp, p_rtprio.prio);
 590         break;
 591     case RTP_PRIO_IDLE:
 592         nice = PRIO_MAX + 1 + PP(pp, p_rtprio.prio);
 593         break;
 594     case RTP_PRIO_THREAD:
 595         nice = PRIO_MIN - 1 - RTP_PRIO_MAX - PP(pp, p_rtprio.prio);
 596         break;
 597     default:
 598         nice = PP(pp, p_nice);
 599         break;
 600     }
 601
 602
 603     /* format this entry */
 604     snprintf(fmt, sizeof(fmt),
 605             smpmode ? smp_Proc_format : up_Proc_format,
 606             PP(pp, p_pid),
 607             namelength, namelength,
 608             (*get_userid)(EP(pp, e_ucred.cr_ruid)),
 609             (show_threads && (TP(pp, td_proc) == NULL)) ? TP(pp, td_pri) :
 610                 PP(pp, p_usdata.bsd4.priority),
 611             nice,
 612             format_k2(PROCSIZE(pp)),
 613             format_k2(pagetok(VP(pp, vm_rssize))),
 614             status,
 615             smpmode ? EP(pp, e_cpuid) : 0,
 616             format_time(cputime),
 617             100.0 * weighted_cpu(pct, pp),
 618             100.0 * pct,
 619             cmdlength,
 620             printable(TP(pp, td_comm)));
 621
 622     /* return the result */
 623     return(fmt);
 624 }
 625
 626
 627 /*
 628  * check_nlist(nlst) - checks the nlist to see if any symbols were not
 629  *              found.  For every symbol that was not found, a one-line
 630  *              message is printed to stderr.  The routine returns the
 631  *              number of symbols NOT found.
 632  */
 633
 634 static int check_nlist(register struct nlist *nlst)
 635 {
 636     register int i;
 637
 638     /* check to see if we got ALL the symbols we requested */
 639     /* this will write one line to stderr for every symbol not found */
 640
 641     i = 0;
 642     while (nlst->n_name != NULL)
 643     {
 644         if (nlst->n_type == 0)
 645         {
 646             /* this one wasn't found */
 647             (void) fprintf(stderr, "kernel: no symbol named `%s'\n",
 648                            nlst->n_name);
 649             i = 1;
 650         }
 651         nlst++;
 652     }
 653
 654     return(i);
 655 }
 656
 657 /* comparison routines for qsort */
 658
 659 /*
 660  *  proc_compare - comparison function for "qsort"
 661  *      Compares the resource consumption of two processes using five
 662  *      distinct keys.  The keys (in descending order of importance) are:
 663  *      percent cpu, cpu ticks, state, resident set size, total virtual
 664  *      memory usage.  The process states are ordered as follows (from least
 665  *      to most important):  WAIT, zombie, sleep, stop, start, run.  The
 666  *      array declaration below maps a process state index into a number
 667  *      that reflects this ordering.
 668  */
 669
 670 static unsigned char sorted_state[] =
 671 {
 672     0,  /* not used             */
 673     3,  /* sleep                */
 674     1,  /* ABANDONED (WAIT)     */
 675     6,  /* run                  */
 676     5,  /* start                */
 677     2,  /* zombie               */
 678     4   /* stop                 */
 679 };
 680
 681
 682 #define ORDERKEY_PCTCPU \
 683   if (lresult = (long) PP(p2, p_pctcpu) - (long) PP(p1, p_pctcpu), \
 684      (result = lresult > 0 ? 1 : lresult < 0 ? -1 : 0) == 0)
 685
 686 #define CPTICKS(p)      (EP(p, e_uticks) + EP(p, e_sticks))
 687
 688 #define ORDERKEY_CPTICKS \
 689   if ((result = CPTICKS(p2) > CPTICKS(p1) ? 1 : \
 690                 CPTICKS(p2) < CPTICKS(p1) ? -1 : 0) == 0)
 691
 692 #define ORDERKEY_STATE \
 693   if ((result = sorted_state[(unsigned char) PP(p2, p_stat)] - \
 694                 sorted_state[(unsigned char) PP(p1, p_stat)]) == 0)
 695
 696 #define ORDERKEY_PRIO \
 697   if ((result = PP(p2, p_usdata.bsd4.priority) - PP(p1, p_usdata.bsd4.priority)) == 0)
 698
 699 #define ORDERKEY_KTHREADS \
 700   if ((result = (TP(p1, td_proc) == NULL) - (TP(p2, td_proc) == NULL)) == 0)
 701
 702 #define ORDERKEY_KTHREADS_PRIO \
 703   if ((result = TP(p2, td_pri) - TP(p1, td_pri)) == 0)
 704
 705 #define ORDERKEY_RSSIZE \
 706   if ((result = VP(p2, vm_rssize) - VP(p1, vm_rssize)) == 0)
 707
 708 #define ORDERKEY_MEM \
 709   if ( (result = PROCSIZE(p2) - PROCSIZE(p1)) == 0 )
 710
 711 /* compare_cpu - the comparison function for sorting by cpu percentage */
 712
 713 int
 714 #ifdef ORDER
 715 compare_cpu(struct proc **pp1, struct proc **pp2)
 716 #else
 717 proc_compare(struct proc **pp1, struct proc **pp2)
 718 #endif
 719 {
 720     register struct kinfo_proc *p1;
 721     register struct kinfo_proc *p2;
 722     register int result;
 723     register pctcpu lresult;
 724
 725     /* remove one level of indirection */
 726     p1 = *(struct kinfo_proc **) pp1;
 727     p2 = *(struct kinfo_proc **) pp2;
 728
 729     ORDERKEY_PCTCPU
 730     ORDERKEY_CPTICKS
 731     ORDERKEY_STATE
 732     ORDERKEY_PRIO
 733     ORDERKEY_RSSIZE
 734     ORDERKEY_MEM
 735     ;
 736
 737     return(result);
 738 }
 739
 740 #ifdef ORDER
 741 /* compare routines */
 742 int compare_size(), compare_res(), compare_time(), compare_prio(), compare_thr();
 743
 744 int (*proc_compares[])() = {
 745     compare_cpu,
 746     compare_size,
 747     compare_res,
 748     compare_time,
 749     compare_prio,
 750     compare_thr,
 751     NULL
 752 };
 753
 754 /* compare_size - the comparison function for sorting by total memory usage */
 755
 756 int
 757 compare_size(struct proc **pp1, struct proc **pp2)
 758 {
 759     register struct kinfo_proc *p1;
 760     register struct kinfo_proc *p2;
 761     register int result;
 762     register pctcpu lresult;
 763
 764     /* remove one level of indirection */
 765     p1 = *(struct kinfo_proc **) pp1;
 766     p2 = *(struct kinfo_proc **) pp2;
 767
 768     ORDERKEY_MEM
 769     ORDERKEY_RSSIZE
 770     ORDERKEY_PCTCPU
 771     ORDERKEY_CPTICKS
 772     ORDERKEY_STATE
 773     ORDERKEY_PRIO
 774     ;
 775
 776     return(result);
 777 }
 778
 779 /* compare_res - the comparison function for sorting by resident set size */
 780
 781 int
 782 compare_res(struct proc **pp1, struct proc **pp2)
 783 {
 784     register struct kinfo_proc *p1;
 785     register struct kinfo_proc *p2;
 786     register int result;
 787     register pctcpu lresult;
 788
 789     /* remove one level of indirection */
 790     p1 = *(struct kinfo_proc **) pp1;
 791     p2 = *(struct kinfo_proc **) pp2;
 792
 793     ORDERKEY_RSSIZE
 794     ORDERKEY_MEM
 795     ORDERKEY_PCTCPU
 796     ORDERKEY_CPTICKS
 797     ORDERKEY_STATE
 798     ORDERKEY_PRIO
 799     ;
 800
 801     return(result);
 802 }
 803
 804 /* compare_time - the comparison function for sorting by total cpu time */
 805
 806 int
 807 compare_time(struct proc **pp1, struct proc **pp2)
 808 {
 809     register struct kinfo_proc *p1;
 810     register struct kinfo_proc *p2;
 811     register int result;
 812     register pctcpu lresult;
 813
 814     /* remove one level of indirection */
 815     p1 = *(struct kinfo_proc **) pp1;
 816     p2 = *(struct kinfo_proc **) pp2;
 817
 818     ORDERKEY_CPTICKS
 819     ORDERKEY_PCTCPU
 820     ORDERKEY_KTHREADS
 821     ORDERKEY_KTHREADS_PRIO
 822     ORDERKEY_STATE
 823     ORDERKEY_PRIO
 824     ORDERKEY_RSSIZE
 825     ORDERKEY_MEM
 826     ;
 827
 828       return(result);
 829   }
 830
 831 /* compare_prio - the comparison function for sorting by cpu percentage */
 832
 833 int
 834 compare_prio(struct proc **pp1, struct proc **pp2)
 835 {
 836     register struct kinfo_proc *p1;
 837     register struct kinfo_proc *p2;
 838     register int result;
 839     register pctcpu lresult;
 840
 841     /* remove one level of indirection */
 842     p1 = *(struct kinfo_proc **) pp1;
 843     p2 = *(struct kinfo_proc **) pp2;
 844
 845     ORDERKEY_KTHREADS
 846     ORDERKEY_KTHREADS_PRIO
 847     ORDERKEY_PRIO
 848     ORDERKEY_CPTICKS
 849     ORDERKEY_PCTCPU
 850     ORDERKEY_STATE
 851     ORDERKEY_RSSIZE
 852     ORDERKEY_MEM
 853     ;
 854
 855     return(result);
 856 }
 857
 858 int
 859 compare_thr(struct proc **pp1, struct proc **pp2)
 860 {
 861     register struct kinfo_proc *p1;
 862     register struct kinfo_proc *p2;
 863     register int result;
 864     register pctcpu lresult;
 865
 866     /* remove one level of indirection */
 867     p1 = *(struct kinfo_proc **) pp1;
 868     p2 = *(struct kinfo_proc **) pp2;
 869
 870     ORDERKEY_KTHREADS
 871     ORDERKEY_KTHREADS_PRIO
 872     ORDERKEY_CPTICKS
 873     ORDERKEY_PCTCPU
 874     ORDERKEY_STATE
 875     ORDERKEY_RSSIZE
 876     ORDERKEY_MEM
 877     ;
 878
 879     return(result);
 880 }
 881
 882
 883 #endif
 884
 885 /*
 886  * proc_owner(pid) - returns the uid that owns process "pid", or -1 if
 887  *              the process does not exist.
 888  *              It is EXTREMLY IMPORTANT that this function work correctly.
 889  *              If top runs setuid root (as in SVR4), then this function
 890  *              is the only thing that stands in the way of a serious
 891  *              security problem.  It validates requests for the "kill"
 892  *              and "renice" commands.
 893  */
 894
 895 int proc_owner(int pid)
 896 {
 897     register int cnt;
 898     register struct kinfo_proc **prefp;
 899     register struct kinfo_proc *pp;
 900
 901     prefp = pref;
 902     cnt = pref_len;
 903     while (--cnt >= 0)
 904     {
 905         pp = *prefp++;
 906         if (PP(pp, p_pid) == (pid_t)pid)
 907         {
 908             return((int)EP(pp, e_ucred.cr_ruid));
 909         }
 910     }
 911     return(-1);
 912 }
 913
 914
 915 /*
 916  * swapmode is based on a program called swapinfo written
 917  * by Kevin Lahey <kml@rokkaku.atl.ga.us>.
 918  */
 919 int
 920 swapmode(int *retavail, int *retfree)
 921 {
 922         int n;
 923         int pagesize = getpagesize();
 924         struct kvm_swap swapary[1];
 925
 926         *retavail = 0;
 927         *retfree = 0;
 928
 929 #define CONVERT(v)      ((quad_t)(v) * pagesize / 1024)
 930
 931         n = kvm_getswapinfo(kd, swapary, 1, 0);
 932         if (n < 0 || swapary[0].ksw_total == 0)
 933                 return(0);
 934
 935         *retavail = CONVERT(swapary[0].ksw_total);
 936         *retfree = CONVERT(swapary[0].ksw_total - swapary[0].ksw_used);
 937
 938         n = (int)((double)swapary[0].ksw_used * 100.0 /
 939             (double)swapary[0].ksw_total);
 940         return(n);
 941 }