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 1.24 2007/04/30 22:48:26 hasso 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_ ## 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 /* the extra nulls in the string "run" are for adding a slash and
 115    the processor number when needed */
 116
 117 char *state_abbrev[] =
 118 {
 119     "", "RUN\0\0\0", "STOP", "SLEEP",
 120 };
 121
 122
 123 static kvm_t *kd;
 124
 125 /* values that we stash away in _init and use in later routines */
 126
 127 static double logcpu;
 128
 129 static long lastpid;
 130 static long cnt;
 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 int memory_stats[7];
 156 char *memorynames[] = {
 157     "K Active, ", "K Inact, ", "K Wired, ", "K Cache, ", "K Buf, ", "K Free",
 158     NULL
 159 };
 160
 161 int 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 #ifdef ORDER
 186 /* sorting orders. first is default */
 187 char *ordernames[] = {
 188     "cpu", "size", "res", "time", "pri", "thr", NULL
 189 };
 190 #endif
 191
 192 static void
 193 cputime_percentages(int out[CPU_STATES], struct kinfo_cputime *new,
 194                     struct kinfo_cputime *old)
 195 {
 196         struct kinfo_cputime diffs;
 197         uint64_t total_change, half_total;
 198
 199         /* initialization */
 200         total_change = 0;
 201
 202         diffs.cp_user = new->cp_user - old->cp_user;
 203         diffs.cp_nice = new->cp_nice - old->cp_nice;
 204         diffs.cp_sys = new->cp_sys - old->cp_sys;
 205         diffs.cp_intr = new->cp_intr - old->cp_intr;
 206         diffs.cp_idle = new->cp_idle - old->cp_idle;
 207         total_change = diffs.cp_user + diffs.cp_nice + diffs.cp_sys +
 208             diffs.cp_intr + diffs.cp_idle;
 209         old->cp_user = new->cp_user;
 210         old->cp_nice = new->cp_nice;
 211         old->cp_sys = new->cp_sys;
 212         old->cp_intr = new->cp_intr;
 213         old->cp_idle = new->cp_idle;
 214
 215         /* avoid divide by zero potential */
 216         if (total_change == 0)
 217                 total_change = 1;
 218
 219         /* calculate percentages based on overall change, rounding up */
 220         half_total = total_change >> 1;
 221
 222         out[0] = ((diffs.cp_user * 1000LL + half_total) / total_change);
 223         out[1] = ((diffs.cp_nice * 1000LL + half_total) / total_change);
 224         out[2] = ((diffs.cp_sys * 1000LL + half_total) / total_change);
 225         out[3] = ((diffs.cp_intr * 1000LL + half_total) / total_change);
 226         out[4] = ((diffs.cp_idle * 1000LL + half_total) / total_change);
 227 }
 228
 229 int
 230 machine_init(struct statics *statics)
 231 {
 232     register int i = 0;
 233     register int pagesize;
 234     size_t modelen;
 235     struct passwd *pw;
 236
 237     if (n_cpus < 1) {
 238         if (kinfo_get_cpus(&n_cpus))
 239             err(1, "kinfo_get_cpus failed");
 240     }
 241     modelen = sizeof(smpmode);
 242     if ((sysctlbyname("machdep.smp_active", &smpmode, &modelen, NULL, 0) < 0 &&
 243          sysctlbyname("smp.smp_active", &smpmode, &modelen, NULL, 0) < 0) ||
 244         modelen != sizeof(smpmode))
 245             smpmode = 0;
 246
 247     while ((pw = getpwent()) != NULL) {
 248         if (strlen(pw->pw_name) > namelength)
 249             namelength = strlen(pw->pw_name);
 250     }
 251     if (namelength < 8)
 252         namelength = 8;
 253     if (smpmode && namelength > 13)
 254         namelength = 13;
 255     else if (namelength > 15)
 256         namelength = 15;
 257
 258     if ((kd = kvm_open(NULL, NULL, NULL, O_RDONLY, "kvm_open")) == NULL)
 259         return -1;
 260
 261     if (kinfo_get_sched_ccpu(&ccpu)) {
 262         fprintf(stderr, "top: kinfo_get_sched_ccpu failed\n");
 263         return(-1);
 264     }
 265
 266     /* this is used in calculating WCPU -- calculate it ahead of time */
 267     logcpu = log(loaddouble(ccpu));
 268
 269     pbase = NULL;
 270     pref = NULL;
 271     nproc = 0;
 272     onproc = -1;
 273     /* get the page size with "getpagesize" and calculate pageshift from it */
 274     pagesize = getpagesize();
 275     pageshift = 0;
 276     while (pagesize > 1)
 277     {
 278         pageshift++;
 279         pagesize >>= 1;
 280     }
 281
 282     /* we only need the amount of log(2)1024 for our conversion */
 283     pageshift -= LOG1024;
 284
 285     /* fill in the statics information */
 286     statics->procstate_names = procstatenames;
 287     statics->cpustate_names = cpustatenames;
 288     statics->memory_names = memorynames;
 289     statics->swap_names = swapnames;
 290 #ifdef ORDER
 291     statics->order_names = ordernames;
 292 #endif
 293
 294     /* all done! */
 295     return(0);
 296 }
 297
 298 char *format_header(register char *uname_field)
 299 {
 300     register char *ptr;
 301     static char Header[128];
 302
 303     snprintf(Header, sizeof(Header), smpmode ? smp_header : up_header,
 304              namelength, namelength, uname_field);
 305
 306     if (screen_width <= 79)
 307         cmdlength = 80;
 308     else
 309         cmdlength = 89;
 310
 311     cmdlength = cmdlength - strlen(Header) + 6;
 312
 313     return Header;
 314 }
 315
 316 static int swappgsin = -1;
 317 static int swappgsout = -1;
 318 extern struct timeval timeout;
 319
 320 void
 321 get_system_info(struct system_info *si)
 322 {
 323     long total;
 324     int mib[2];
 325     struct timeval boottime;
 326     size_t bt_size;
 327     size_t len;
 328     int cpu;
 329
 330     if (cpu_states == NULL) {
 331         cpu_states = malloc(sizeof(*cpu_states) * CPU_STATES * n_cpus);
 332         if (cpu_states == NULL)
 333             err(1, "malloc");
 334         bzero(cpu_states, sizeof(*cpu_states) * CPU_STATES * n_cpus);
 335     }
 336     if (cp_time == NULL) {
 337         cp_time = malloc(2 * n_cpus * sizeof(cp_time[0]));
 338         if (cp_time == NULL)
 339             err(1, "cp_time");
 340         cp_old = cp_time + n_cpus;
 341
 342         len = n_cpus * sizeof(cp_old[0]);
 343         bzero(cp_time, len);
 344         if (sysctlbyname("kern.cputime", cp_old, &len, NULL, 0))
 345             err(1, "kern.cputime");
 346     }
 347
 348     len = n_cpus * sizeof(cp_time[0]);
 349     bzero(cp_time, len);
 350     if (sysctlbyname("kern.cputime", cp_time, &len, NULL, 0))
 351         err(1, "kern.cputime");
 352
 353     getloadavg(si->load_avg, 3);
 354
 355     lastpid = 0;
 356
 357     /* convert cp_time counts to percentages */
 358     for (cpu = 0; cpu < n_cpus; ++cpu) {
 359         cputime_percentages(cpu_states + cpu * CPU_STATES,
 360                             &cp_time[cpu], &cp_old[cpu]);
 361     }
 362
 363     /* sum memory & swap statistics */
 364     {
 365         struct vmmeter vmm;
 366         struct vmstats vms;
 367         int vms_size = sizeof(vms);
 368         int vmm_size = sizeof(vmm);
 369         static unsigned int swap_delay = 0;
 370         static int swapavail = 0;
 371         static int swapfree = 0;
 372         static int bufspace = 0;
 373
 374         if (sysctlbyname("vm.vmstats", &vms, &vms_size, NULL, 0))
 375                 err(1, "sysctlbyname: vm.vmstats");
 376
 377         if (sysctlbyname("vm.vmmeter", &vmm, &vmm_size, NULL, 0))
 378                 err(1, "sysctlbyname: vm.vmmeter");
 379
 380         if (kinfo_get_vfs_bufspace(&bufspace))
 381                 err(1, "kinfo_get_vfs_bufspace");
 382
 383         /* convert memory stats to Kbytes */
 384         memory_stats[0] = pagetok(vms.v_active_count);
 385         memory_stats[1] = pagetok(vms.v_inactive_count);
 386         memory_stats[2] = pagetok(vms.v_wire_count);
 387         memory_stats[3] = pagetok(vms.v_cache_count);
 388         memory_stats[4] = bufspace / 1024;
 389         memory_stats[5] = pagetok(vms.v_free_count);
 390         memory_stats[6] = -1;
 391
 392         /* first interval */
 393         if (swappgsin < 0) {
 394             swap_stats[4] = 0;
 395             swap_stats[5] = 0;
 396         }
 397
 398         /* compute differences between old and new swap statistic */
 399         else {
 400             swap_stats[4] = pagetok(((vmm.v_swappgsin - swappgsin)));
 401             swap_stats[5] = pagetok(((vmm.v_swappgsout - swappgsout)));
 402         }
 403
 404         swappgsin = vmm.v_swappgsin;
 405         swappgsout = vmm.v_swappgsout;
 406
 407         /* call CPU heavy swapmode() only for changes */
 408         if (swap_stats[4] > 0 || swap_stats[5] > 0 || swap_delay == 0) {
 409             swap_stats[3] = swapmode(&swapavail, &swapfree);
 410             swap_stats[0] = swapavail;
 411             swap_stats[1] = swapavail - swapfree;
 412             swap_stats[2] = swapfree;
 413         }
 414         swap_delay = 1;
 415         swap_stats[6] = -1;
 416     }
 417
 418     /* set arrays and strings */
 419     si->cpustates = cpu_states;
 420     si->memory = memory_stats;
 421     si->swap = swap_stats;
 422
 423
 424     if(lastpid > 0) {
 425         si->last_pid = lastpid;
 426     } else {
 427         si->last_pid = -1;
 428     }
 429
 430     /*
 431      * Print how long system has been up.
 432      * (Found by looking getting "boottime" from the kernel)
 433      */
 434     mib[0] = CTL_KERN;
 435     mib[1] = KERN_BOOTTIME;
 436     bt_size = sizeof(boottime);
 437     if (sysctl(mib, 2, &boottime, &bt_size, NULL, 0) != -1 &&
 438         boottime.tv_sec != 0) {
 439         si->boottime = boottime;
 440     } else {
 441         si->boottime.tv_sec = -1;
 442     }
 443 }
 444
 445 static struct handle handle;
 446
 447 caddr_t get_process_info(struct system_info *si, struct process_select *sel,
 448                          int (*compare)())
 449 {
 450     register int i;
 451     register int total_procs;
 452     register int active_procs;
 453     register struct kinfo_proc **prefp;
 454     register struct kinfo_proc *pp;
 455
 456     /* these are copied out of sel for speed */
 457     int show_idle;
 458     int show_self;
 459     int show_system;
 460     int show_only_threads;
 461     int show_uid;
 462     int show_command;
 463
 464
 465     pbase = kvm_getprocs(kd, KERN_PROC_ALL, 0, &nproc);
 466     if (nproc > onproc)
 467         pref = (struct kinfo_proc **) realloc(pref, sizeof(struct kinfo_proc *)
 468                 * (onproc = nproc));
 469     if (pref == NULL || pbase == NULL) {
 470         (void) fprintf(stderr, "top: Out of memory.\n");
 471         quit(23);
 472     }
 473     /* get a pointer to the states summary array */
 474     si->procstates = process_states;
 475
 476     /* set up flags which define what we are going to select */
 477     show_idle = sel->idle;
 478     show_self = sel->self;
 479     show_system = sel->system;
 480     show_threads = sel->threads;
 481     show_only_threads = sel->only_threads;
 482     show_uid = sel->uid != -1;
 483     show_command = sel->command != NULL;
 484
 485     /* count up process states and get pointers to interesting procs */
 486     total_procs = 0;
 487     active_procs = 0;
 488     memset((char *)process_states, 0, sizeof(process_states));
 489     prefp = pref;
 490     for (pp = pbase, i = 0; i < nproc; pp++, i++)
 491     {
 492         /*
 493          *  Place pointers to each valid proc structure in pref[].
 494          *  Process slots that are actually in use have a non-zero
 495          *  status field.  Processes with P_SYSTEM set are system
 496          *  processes---these get ignored unless show_sysprocs is set.
 497          */
 498         if ((show_threads && (LP(pp, pid) == -1)) ||
 499             (!show_only_threads && (PP(pp, stat) != 0 &&
 500             (show_self != PP(pp, pid)) &&
 501             (show_system || ((PP(pp, flags) & P_SYSTEM) == 0)))))
 502         {
 503             total_procs++;
 504             process_states[(unsigned char) PP(pp, stat)]++;
 505             if ((show_threads && (LP(pp, pid) == -1)) ||
 506                 (!show_only_threads && PP(pp, stat) != SZOMB &&
 507                 (show_idle || (LP(pp, pctcpu) != 0) ||
 508                  (LP(pp, stat) == LSRUN)) &&
 509                 (!show_uid || PP(pp, ruid) == (uid_t)sel->uid)))
 510             {
 511                 *prefp++ = pp;
 512                 active_procs++;
 513             }
 514         }
 515     }
 516
 517     /* if requested, sort the "interesting" processes */
 518     if (compare != NULL)
 519     {
 520         qsort((char *)pref, active_procs, sizeof(struct kinfo_proc *), compare);
 521     }
 522
 523     /* remember active and total counts */
 524     si->p_total = total_procs;
 525     si->p_active = pref_len = active_procs;
 526
 527     /* pass back a handle */
 528     handle.next_proc = pref;
 529     handle.remaining = active_procs;
 530     return((caddr_t)&handle);
 531 }
 532
 533 char fmt[128];          /* static area where result is built */
 534
 535 char *format_next_process(caddr_t handle, char *(*get_userid)())
 536 {
 537     struct kinfo_proc *pp;
 538     long cputime;
 539     double pct;
 540     struct handle *hp;
 541     char status[16];
 542     char const *wrapper;
 543     int state;
 544     int nice;
 545
 546     /* find and remember the next proc structure */
 547     hp = (struct handle *)handle;
 548     pp = *(hp->next_proc++);
 549     hp->remaining--;
 550
 551     /* set the wrapper for the process/thread name */
 552     if ((PP(pp, flags) & P_SWAPPEDOUT))
 553          wrapper = "[]"; /* swapped process [pname] */
 554     else if (((PP(pp, flags) & P_SYSTEM) != 0) && (LP(pp, pid) > 0))
 555          wrapper = "()"; /* system process (pname) */
 556     else if (show_threads && (LP(pp, pid) == -1))
 557          wrapper = "<>"; /* pure kernel threads <thread> */
 558     else
 559          wrapper = NULL;
 560
 561     /* get the process's command name */
 562     if (wrapper != NULL) {
 563         char *comm = PP(pp, comm);
 564 #define COMSIZ sizeof(PP(pp, comm))
 565         char buf[COMSIZ];
 566         (void) strncpy(buf, comm, COMSIZ);
 567         comm[0] = wrapper[0];
 568         (void) strncpy(&comm[1], buf, COMSIZ - 2);
 569         comm[COMSIZ - 2] = '\0';
 570         (void) strncat(comm, &wrapper[1], COMSIZ - 1);
 571         comm[COMSIZ - 1] = '\0';
 572     }
 573
 574     /*
 575      * Convert the process's runtime from microseconds to seconds.  This
 576      * time includes the interrupt time although that is not wanted here.
 577      * ps(1) is similarly sloppy.
 578      */
 579     cputime = (LP(pp, uticks) + LP(pp, sticks)) / 1000000;
 580
 581     /* calculate the base for cpu percentages */
 582     pct = pctdouble(LP(pp, pctcpu));
 583
 584     /* generate "STATE" field */
 585     switch (state = LP(pp, stat)) {
 586         case LSRUN:
 587             if (smpmode && LP(pp, tdflags) & TDF_RUNNING)
 588                 sprintf(status, "CPU%d", LP(pp, cpuid));
 589             else
 590                 strcpy(status, "RUN");
 591             break;
 592         case LSSLEEP:
 593             if (LP(pp, wmesg) != NULL) {
 594                 sprintf(status, "%.6s", LP(pp, wmesg));
 595                 break;
 596             }
 597             /* fall through */
 598         default:
 599
 600             if (state >= 0 &&
 601                 state < sizeof(state_abbrev) / sizeof(*state_abbrev))
 602                     sprintf(status, "%.6s", state_abbrev[(unsigned char) state]);
 603             else
 604                     sprintf(status, "?%5d", state);
 605             break;
 606     }
 607
 608     if (PP(pp, stat) == SZOMB)
 609             strcpy(status, "ZOMB");
 610
 611     /*
 612      * idle time 0 - 31 -> nice value +21 - +52
 613      * normal time      -> nice value -20 - +20
 614      * real time 0 - 31 -> nice value -52 - -21
 615      * thread    0 - 31 -> nice value -53 -
 616      */
 617     switch(LP(pp, rtprio.type)) {
 618     case RTP_PRIO_REALTIME:
 619         nice = PRIO_MIN - 1 - RTP_PRIO_MAX + LP(pp, rtprio.prio);
 620         break;
 621     case RTP_PRIO_IDLE:
 622         nice = PRIO_MAX + 1 + LP(pp, rtprio.prio);
 623         break;
 624     case RTP_PRIO_THREAD:
 625         nice = PRIO_MIN - 1 - RTP_PRIO_MAX - LP(pp, rtprio.prio);
 626         break;
 627     default:
 628         nice = PP(pp, nice);
 629         break;
 630     }
 631
 632
 633     /* format this entry */
 634     snprintf(fmt, sizeof(fmt),
 635             smpmode ? smp_Proc_format : up_Proc_format,
 636             PP(pp, pid),
 637             namelength, namelength,
 638             (*get_userid)(PP(pp, ruid)),
 639             (show_threads && (LP(pp, pid) == -1)) ? LP(pp, tdprio) :
 640                 LP(pp, prio),
 641             nice,
 642             format_k2(PROCSIZE(pp)),
 643             format_k2(pagetok(VP(pp, rssize))),
 644             status,
 645             smpmode ? LP(pp, cpuid) : 0,
 646             format_time(cputime),
 647             100.0 * weighted_cpu(pct, pp),
 648             100.0 * pct,
 649             cmdlength,
 650             printable(PP(pp, comm)));
 651
 652     /* return the result */
 653     return(fmt);
 654 }
 655
 656
 657 /*
 658  * check_nlist(nlst) - checks the nlist to see if any symbols were not
 659  *              found.  For every symbol that was not found, a one-line
 660  *              message is printed to stderr.  The routine returns the
 661  *              number of symbols NOT found.
 662  */
 663
 664 static int check_nlist(register struct nlist *nlst)
 665 {
 666     register int i;
 667
 668     /* check to see if we got ALL the symbols we requested */
 669     /* this will write one line to stderr for every symbol not found */
 670
 671     i = 0;
 672     while (nlst->n_name != NULL)
 673     {
 674         if (nlst->n_type == 0)
 675         {
 676             /* this one wasn't found */
 677             (void) fprintf(stderr, "kernel: no symbol named `%s'\n",
 678                            nlst->n_name);
 679             i = 1;
 680         }
 681         nlst++;
 682     }
 683
 684     return(i);
 685 }
 686
 687 /* comparison routines for qsort */
 688
 689 /*
 690  *  proc_compare - comparison function for "qsort"
 691  *      Compares the resource consumption of two processes using five
 692  *      distinct keys.  The keys (in descending order of importance) are:
 693  *      percent cpu, cpu ticks, state, resident set size, total virtual
 694  *      memory usage.  The process states are ordered as follows (from least
 695  *      to most important):  WAIT, zombie, sleep, stop, start, run.  The
 696  *      array declaration below maps a process state index into a number
 697  *      that reflects this ordering.
 698  */
 699
 700 static unsigned char sorted_state[] =
 701 {
 702     0,  /* not used             */
 703     3,  /* sleep                */
 704     1,  /* ABANDONED (WAIT)     */
 705     6,  /* run                  */
 706     5,  /* start                */
 707     2,  /* zombie               */
 708     4   /* stop                 */
 709 };
 710
 711
 712 #define ORDERKEY_PCTCPU \
 713   if (lresult = (long) LP(p2, pctcpu) - (long) LP(p1, pctcpu), \
 714      (result = lresult > 0 ? 1 : lresult < 0 ? -1 : 0) == 0)
 715
 716 #define CPTICKS(p)      (LP(p, uticks) + LP(p, sticks))
 717
 718 #define ORDERKEY_CPTICKS \
 719   if ((result = CPTICKS(p2) > CPTICKS(p1) ? 1 : \
 720                 CPTICKS(p2) < CPTICKS(p1) ? -1 : 0) == 0)
 721
 722 #define ORDERKEY_STATE \
 723   if ((result = sorted_state[(unsigned char) PP(p2, stat)] - \
 724                 sorted_state[(unsigned char) PP(p1, stat)]) == 0)
 725
 726 #define ORDERKEY_PRIO \
 727   if ((result = LP(p2, prio) - LP(p1, prio)) == 0)
 728
 729 #define ORDERKEY_KTHREADS \
 730   if ((result = (LP(p1, pid) == 0) - (LP(p2, pid) == 0)) == 0)
 731
 732 #define ORDERKEY_KTHREADS_PRIO \
 733   if ((result = LP(p2, tdprio) - LP(p1, tdprio)) == 0)
 734
 735 #define ORDERKEY_RSSIZE \
 736   if ((result = VP(p2, rssize) - VP(p1, rssize)) == 0)
 737
 738 #define ORDERKEY_MEM \
 739   if ( (result = PROCSIZE(p2) - PROCSIZE(p1)) == 0 )
 740
 741 /* compare_cpu - the comparison function for sorting by cpu percentage */
 742
 743 int
 744 #ifdef ORDER
 745 compare_cpu(struct proc **pp1, struct proc **pp2)
 746 #else
 747 proc_compare(struct proc **pp1, struct proc **pp2)
 748 #endif
 749 {
 750     register struct kinfo_proc *p1;
 751     register struct kinfo_proc *p2;
 752     register int result;
 753     register pctcpu lresult;
 754
 755     /* remove one level of indirection */
 756     p1 = *(struct kinfo_proc **) pp1;
 757     p2 = *(struct kinfo_proc **) pp2;
 758
 759     ORDERKEY_PCTCPU
 760     ORDERKEY_CPTICKS
 761     ORDERKEY_STATE
 762     ORDERKEY_PRIO
 763     ORDERKEY_RSSIZE
 764     ORDERKEY_MEM
 765     ;
 766
 767     return(result);
 768 }
 769
 770 #ifdef ORDER
 771 /* compare routines */
 772 int compare_size(), compare_res(), compare_time(), compare_prio(), compare_thr();
 773
 774 int (*proc_compares[])() = {
 775     compare_cpu,
 776     compare_size,
 777     compare_res,
 778     compare_time,
 779     compare_prio,
 780     compare_thr,
 781     NULL
 782 };
 783
 784 /* compare_size - the comparison function for sorting by total memory usage */
 785
 786 int
 787 compare_size(struct proc **pp1, struct proc **pp2)
 788 {
 789     register struct kinfo_proc *p1;
 790     register struct kinfo_proc *p2;
 791     register int result;
 792     register pctcpu lresult;
 793
 794     /* remove one level of indirection */
 795     p1 = *(struct kinfo_proc **) pp1;
 796     p2 = *(struct kinfo_proc **) pp2;
 797
 798     ORDERKEY_MEM
 799     ORDERKEY_RSSIZE
 800     ORDERKEY_PCTCPU
 801     ORDERKEY_CPTICKS
 802     ORDERKEY_STATE
 803     ORDERKEY_PRIO
 804     ;
 805
 806     return(result);
 807 }
 808
 809 /* compare_res - the comparison function for sorting by resident set size */
 810
 811 int
 812 compare_res(struct proc **pp1, struct proc **pp2)
 813 {
 814     register struct kinfo_proc *p1;
 815     register struct kinfo_proc *p2;
 816     register int result;
 817     register pctcpu lresult;
 818
 819     /* remove one level of indirection */
 820     p1 = *(struct kinfo_proc **) pp1;
 821     p2 = *(struct kinfo_proc **) pp2;
 822
 823     ORDERKEY_RSSIZE
 824     ORDERKEY_MEM
 825     ORDERKEY_PCTCPU
 826     ORDERKEY_CPTICKS
 827     ORDERKEY_STATE
 828     ORDERKEY_PRIO
 829     ;
 830
 831     return(result);
 832 }
 833
 834 /* compare_time - the comparison function for sorting by total cpu time */
 835
 836 int
 837 compare_time(struct proc **pp1, struct proc **pp2)
 838 {
 839     register struct kinfo_proc *p1;
 840     register struct kinfo_proc *p2;
 841     register int result;
 842     register pctcpu lresult;
 843
 844     /* remove one level of indirection */
 845     p1 = *(struct kinfo_proc **) pp1;
 846     p2 = *(struct kinfo_proc **) pp2;
 847
 848     ORDERKEY_CPTICKS
 849     ORDERKEY_PCTCPU
 850     ORDERKEY_KTHREADS
 851     ORDERKEY_KTHREADS_PRIO
 852     ORDERKEY_STATE
 853     ORDERKEY_PRIO
 854     ORDERKEY_RSSIZE
 855     ORDERKEY_MEM
 856     ;
 857
 858       return(result);
 859   }
 860
 861 /* compare_prio - the comparison function for sorting by cpu percentage */
 862
 863 int
 864 compare_prio(struct proc **pp1, struct proc **pp2)
 865 {
 866     register struct kinfo_proc *p1;
 867     register struct kinfo_proc *p2;
 868     register int result;
 869     register pctcpu lresult;
 870
 871     /* remove one level of indirection */
 872     p1 = *(struct kinfo_proc **) pp1;
 873     p2 = *(struct kinfo_proc **) pp2;
 874
 875     ORDERKEY_KTHREADS
 876     ORDERKEY_KTHREADS_PRIO
 877     ORDERKEY_PRIO
 878     ORDERKEY_CPTICKS
 879     ORDERKEY_PCTCPU
 880     ORDERKEY_STATE
 881     ORDERKEY_RSSIZE
 882     ORDERKEY_MEM
 883     ;
 884
 885     return(result);
 886 }
 887
 888 int
 889 compare_thr(struct proc **pp1, struct proc **pp2)
 890 {
 891     register struct kinfo_proc *p1;
 892     register struct kinfo_proc *p2;
 893     register int result;
 894     register pctcpu lresult;
 895
 896     /* remove one level of indirection */
 897     p1 = *(struct kinfo_proc **) pp1;
 898     p2 = *(struct kinfo_proc **) pp2;
 899
 900     ORDERKEY_KTHREADS
 901     ORDERKEY_KTHREADS_PRIO
 902     ORDERKEY_CPTICKS
 903     ORDERKEY_PCTCPU
 904     ORDERKEY_STATE
 905     ORDERKEY_RSSIZE
 906     ORDERKEY_MEM
 907     ;
 908
 909     return(result);
 910 }
 911
 912
 913 #endif
 914
 915 /*
 916  * proc_owner(pid) - returns the uid that owns process "pid", or -1 if
 917  *              the process does not exist.
 918  *              It is EXTREMLY IMPORTANT that this function work correctly.
 919  *              If top runs setuid root (as in SVR4), then this function
 920  *              is the only thing that stands in the way of a serious
 921  *              security problem.  It validates requests for the "kill"
 922  *              and "renice" commands.
 923  */
 924
 925 int proc_owner(int pid)
 926 {
 927     register int cnt;
 928     register struct kinfo_proc **prefp;
 929     register struct kinfo_proc *pp;
 930
 931     prefp = pref;
 932     cnt = pref_len;
 933     while (--cnt >= 0)
 934     {
 935         pp = *prefp++;
 936         if (PP(pp, pid) == (pid_t)pid)
 937         {
 938             return((int)PP(pp, ruid));
 939         }
 940     }
 941     return(-1);
 942 }
 943
 944
 945 /*
 946  * swapmode is based on a program called swapinfo written
 947  * by Kevin Lahey <kml@rokkaku.atl.ga.us>.
 948  */
 949 int
 950 swapmode(int *retavail, int *retfree)
 951 {
 952         int n;
 953         int pagesize = getpagesize();
 954         struct kvm_swap swapary[1];
 955
 956         *retavail = 0;
 957         *retfree = 0;
 958
 959 #define CONVERT(v)      ((quad_t)(v) * pagesize / 1024)
 960
 961         n = kvm_getswapinfo(kd, swapary, 1, 0);
 962         if (n < 0 || swapary[0].ksw_total == 0)
 963                 return(0);
 964
 965         *retavail = CONVERT(swapary[0].ksw_total);
 966         *retfree = CONVERT(swapary[0].ksw_total - swapary[0].ksw_used);
 967
 968         n = (int)((double)swapary[0].ksw_used * 100.0 /
 969             (double)swapary[0].ksw_total);
 970         return(n);
 971 }