w/w.c

   1 /*-
   2  * Copyright (c) 1980, 1991, 1993, 1994
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by the University of
  16  *      California, Berkeley and its contributors.
  17  * 4. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  */
  33
  34 #include <sys/cdefs.h>
  35
  36 #ifndef lint
  37 static const char copyright[] =
  38 "@(#) Copyright (c) 1980, 1991, 1993, 1994\n\
  39         The Regents of the University of California.  All rights reserved.\n";
  40 #endif
  41
  42 #ifndef lint
  43 static const char sccsid[] = "@(#)w.c   8.4 (Berkeley) 4/16/94";
  44 #endif
  45
  46 /*
  47  * w - print system status (who and what)
  48  *
  49  * This program is similar to the systat command on Tenex/Tops 10/20
  50  *
  51  */
  52 #include <sys/param.h>
  53 #include <sys/time.h>
  54 #include <sys/stat.h>
  55 #include <sys/sysctl.h>
  56 #include <sys/proc.h>
  57 #include <sys/user.h>
  58 #include <sys/ioctl.h>
  59 #include <sys/socket.h>
  60 #include <sys/tty.h>
  61
  62 #include <netinet/in.h>
  63 #include <arpa/inet.h>
  64 #include <arpa/nameser.h>
  65
  66 #include <ctype.h>
  67 #include <err.h>
  68 #include <errno.h>
  69 #include <fcntl.h>
  70 #include <kvm.h>
  71 #include <limits.h>
  72 #include <locale.h>
  73 #include <netdb.h>
  74 #include <nlist.h>
  75 #include <paths.h>
  76 #include <resolv.h>
  77 #include <stdio.h>
  78 #include <stdlib.h>
  79 #include <string.h>
  80 #include <unistd.h>
  81 #include <utmp.h>
  82 #include <vis.h>
  83
  84 #include "extern.h"
  85
  86 struct timeval  boottime;
  87 struct utmp     utmp;
  88 struct winsize  ws;
  89 kvm_t          *kd;
  90 time_t          now;            /* the current time of day */
  91 int             ttywidth;       /* width of tty */
  92 int             argwidth;       /* width of tty */
  93 int             header = 1;     /* true if -h flag: don't print heading */
  94 int             nflag;          /* true if -n flag: don't convert addrs */
  95 int             dflag;          /* true if -d flag: output debug info */
  96 int             sortidle;       /* sort by idle time */
  97 int             use_ampm;       /* use AM/PM time */
  98 int             use_comma;      /* use comma as floats separator */
  99 char          **sel_users;      /* login array of particular users selected */
 100
 101 /*
 102  * One of these per active utmp entry.
 103  */
 104 struct  entry {
 105         struct  entry *next;
 106         struct  utmp utmp;
 107         dev_t   tdev;                   /* dev_t of terminal */
 108         time_t  idle;                   /* idle time of terminal in seconds */
 109         struct  kinfo_proc *kp;         /* `most interesting' proc */
 110         char    *args;                  /* arg list of interesting process */
 111         struct  kinfo_proc *dkp;        /* debug option proc list */
 112 } *ep, *ehead = NULL, **nextp = &ehead;
 113
 114 #define debugproc(p) *((struct kinfo_proc **)&(p)->ki_spare[0])
 115
 116 /* W_DISPHOSTSIZE should not be greater than UT_HOSTSIZE */
 117 #define W_DISPHOSTSIZE  16
 118
 119 static void              pr_header(time_t *, int);
 120 static struct stat      *ttystat(char *, int);
 121 static void              usage(int);
 122 static int               this_is_uptime(const char *s);
 123 static void              w_getargv(void);
 124
 125 char *fmt_argv(char **, char *, int);   /* ../../bin/ps/fmt.c */
 126
 127 int
 128 main(argc, argv)
 129         int argc;
 130         char **argv;
 131 {
 132         struct kinfo_proc *kp, *kprocbuf;
 133         struct kinfo_proc *dkp;
 134         struct stat *stp;
 135         FILE *ut;
 136         time_t touched;
 137         int ch, i, nentries, nusers, wcmd, longidle, dropgid;
 138         const char *memf, *nlistf, *p;
 139         char *x_suffix;
 140         char buf[MAXHOSTNAMELEN], errbuf[_POSIX2_LINE_MAX];
 141         char fn[MAXHOSTNAMELEN];
 142         char *dot;
 143         int local_error = 0, retry_count = 0;
 144         size_t bufSize = 0;
 145         size_t orig_bufSize = 0;
 146         int mib[4] = {CTL_KERN, KERN_PROC, KERN_PROC_ALL, 0 };
 147
 148         (void)setlocale(LC_ALL, "");
 149         /*
 150         use_ampm = (*nl_langinfo(T_FMT_AMPM) != '\0');
 151         use_comma = (*nl_langinfo(RADIXCHAR) != ',');
 152         */
 153
 154         /* Are we w(1) or uptime(1)? */
 155         if (this_is_uptime(argv[0]) == 0) {
 156                 wcmd = 0;
 157                 p = "";
 158         } else {
 159                 wcmd = 1;
 160                 p = "dhiflM:N:nsuw";
 161         }
 162
 163         dropgid = 0;
 164         memf = nlistf = NULL;
 165         while ((ch = getopt(argc, argv, p)) != -1)
 166                 switch (ch) {
 167                 case 'd':
 168                         dflag = 1;
 169                         break;
 170                 case 'h':
 171                         header = 0;
 172                         break;
 173                 case 'i':
 174                         sortidle = 1;
 175                         break;
 176                 case 'M':
 177                         header = 0;
 178                         memf = optarg;
 179                         dropgid = 1;
 180                         break;
 181                 case 'N':
 182                         nlistf = optarg;
 183                         dropgid = 1;
 184                         break;
 185                 case 'n':
 186                         nflag = 1;
 187                         break;
 188                 case 'f': case 'l': case 's': case 'u': case 'w':
 189                         warnx("[-flsuw] no longer supported");
 190                         /* FALLTHROUGH */
 191                 case '?':
 192                 default:
 193                         usage(wcmd);
 194                 }
 195         argc -= optind;
 196         argv += optind;
 197
 198         if (!(_res.options & RES_INIT))
 199                 res_init();
 200         _res.retrans = 2;       /* resolver timeout to 2 seconds per try */
 201         _res.retry = 1;         /* only try once.. */
 202
 203         /*
 204          * Discard setgid privileges if not the running kernel so that bad
 205          * guys can't print interesting stuff from kernel memory.
 206          */
 207         if (dropgid)
 208                 setgid(getgid());
 209
 210 #ifdef OLD_PROC
 211         if ((kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf)) == NULL)
 212                 errx(1, "%s", errbuf);
 213 #endif
 214
 215         (void)time(&now);
 216         if ((ut = fopen(_PATH_UTMP, "r")) == NULL)
 217                 err(1, "%s", _PATH_UTMP);
 218
 219         if (*argv)
 220                 sel_users = argv;
 221
 222         for (nusers = 0; fread(&utmp, sizeof(utmp), 1, ut);) {
 223                 if (utmp.ut_name[0] == '\0')
 224                         continue;
 225                 if (!(stp = ttystat(utmp.ut_line, UT_LINESIZE)))
 226                         continue;       /* corrupted record */
 227                 ++nusers;
 228                 if (wcmd == 0)
 229                         continue;
 230                 if (sel_users) {
 231                         int usermatch;
 232                         char **user;
 233
 234                         usermatch = 0;
 235                         for (user = sel_users; !usermatch && *user; user++)
 236                                 if (!strncmp(utmp.ut_name, *user, UT_NAMESIZE))
 237                                         usermatch = 1;
 238                         if (!usermatch)
 239                                 continue;
 240                 }
 241                 if ((ep = calloc(1, sizeof(struct entry))) == NULL)
 242                         errx(1, "calloc");
 243                 *nextp = ep;
 244                 nextp = &ep->next;
 245                 memmove(&ep->utmp, &utmp, sizeof(struct utmp));
 246                 ep->tdev = stp->st_rdev;
 247 #ifdef CPU_CONSDEV
 248                 /*
 249                  * If this is the console device, attempt to ascertain
 250                  * the true console device dev_t.
 251                  */
 252                 if (ep->tdev == 0) {
 253                         int mib[2];
 254                         size_t size;
 255
 256                         mib[0] = CTL_MACHDEP;
 257                         mib[1] = CPU_CONSDEV;
 258                         size = sizeof(dev_t);
 259                         (void)sysctl(mib, 2, &ep->tdev, &size, NULL, 0);
 260                 }
 261 #endif
 262                 touched = stp->st_atime;
 263                 if (touched < ep->utmp.ut_time) {
 264                         /* tty untouched since before login */
 265                         touched = ep->utmp.ut_time;
 266                 }
 267                 if ((ep->idle = now - touched) < 0)
 268                         ep->idle = 0;
 269         }
 270         (void)fclose(ut);
 271
 272         if (header || wcmd == 0) {
 273                 pr_header(&now, nusers);
 274                 if (wcmd == 0) {
 275 #ifdef OLD_PROC
 276                         (void)kvm_close(kd);
 277 #endif
 278                         exit(0);
 279                 }
 280
 281 #define HEADER_USER             "USER"
 282 #define HEADER_TTY              "TTY"
 283 #define HEADER_FROM             "FROM"
 284 #define HEADER_LOGIN_IDLE       "LOGIN@  IDLE "
 285 #define HEADER_WHAT             "WHAT\n"
 286 #define WUSED  (UT_NAMESIZE + UT_LINESIZE + W_DISPHOSTSIZE + \
 287                 sizeof(HEADER_LOGIN_IDLE) + 3)  /* header width incl. spaces */
 288                 (void)printf("%-*.*s %-*.*s %-*.*s  %s",
 289                                 UT_NAMESIZE, UT_NAMESIZE, HEADER_USER,
 290                                 UT_LINESIZE, UT_LINESIZE, HEADER_TTY,
 291                                 W_DISPHOSTSIZE, W_DISPHOSTSIZE, HEADER_FROM,
 292                                 HEADER_LOGIN_IDLE HEADER_WHAT);
 293         }
 294
 295 #ifdef OLD_PROC
 296         if ((kp = kvm_getprocs(kd, KERN_PROC_ALL, 0, &nentries)) == NULL)
 297                 err(1, "%s", kvm_geterr(kd));
 298 #else
 299         mib[0] = CTL_KERN;
 300         mib[1] = KERN_PROC;
 301         mib[2] = KERN_PROC_ALL;
 302         mib[3] = 0;
 303
 304         if (sysctl(mib, 4, NULL, &bufSize, NULL, 0) < 0) {
 305                 perror("Failure calling sysctl");
 306                 exit(1);
 307         }
 308
 309         kprocbuf = kp = (struct kinfo_proc *)malloc(bufSize);
 310
 311         retry_count = 0;
 312         orig_bufSize = bufSize;
 313         for (retry_count = 0; ; retry_count++) {
 314                 local_error = 0;
 315                 bufSize = orig_bufSize;
 316                 if ((local_error = sysctl(mib, 4, kp, &bufSize, NULL, 0)) < 0) {
 317                         if (retry_count < 1000) {
 318                                 sleep(1);
 319                                 continue;
 320                         }
 321                         perror("Failure calling sysctl");
 322                         exit(1);
 323                 } else if (local_error == 0) {
 324                         break;
 325                 }
 326                 sleep(1);
 327         }
 328         nentries = bufSize / sizeof(struct kinfo_proc);
 329 #endif
 330         for (i = 0; i < nentries; i++, kp++) {
 331                 if (kp->kp_proc.p_stat == SIDL || kp->kp_proc.p_stat == SZOMB)
 332                         continue;
 333                 for (ep = ehead; ep != NULL; ep = ep->next) {
 334                         if (ep->tdev == kp->kp_eproc.e_tdev) {
 335                                 /*
 336                                  * proc is associated with this terminal
 337                                  */
 338                                 if (ep->kp == NULL && kp->kp_eproc.e_pgid == kp->kp_eproc.e_tpgid) {
 339                                         /*
 340                                          * Proc is 'most interesting'
 341                                          */
 342                                         if (proc_compare(&ep->kp->kp_proc, &kp->kp_proc))
 343                                                 ep->kp = kp;
 344                                 }
 345                                 /*
 346                                  * Proc debug option info; add to debug
 347                                  * list using kinfo_proc ki_spare[0]
 348                                  * as next pointer; ptr to ptr avoids the
 349                                  * ptr = long assumption.
 350                                  */
 351                                 dkp = ep->dkp;
 352                                 ep->dkp = kp;
 353 /* --bbraun
 354                                 debugproc(kp) = dkp;
 355 */
 356                         }
 357                 }
 358         }
 359         if ((ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) == -1 &&
 360              ioctl(STDERR_FILENO, TIOCGWINSZ, &ws) == -1 &&
 361              ioctl(STDIN_FILENO, TIOCGWINSZ, &ws) == -1) || ws.ws_col == 0)
 362                ttywidth = 79;
 363         else
 364                ttywidth = ws.ws_col - 1;
 365         argwidth = ttywidth - WUSED;
 366         if (argwidth < 4)
 367                 argwidth = 8;
 368         for (ep = ehead; ep != NULL; ep = ep->next) {
 369                 if (ep->kp == NULL) {
 370                         ep->args = strdup("-");
 371                         continue;
 372                 }
 373 #ifdef OLD_PROC
 374                 ep->args = fmt_argv(kvm_getargv(kd, ep->kp, argwidth),
 375                     ep->kp->kp_proc.p_comm, MAXCOMLEN);
 376 #else
 377                 w_getargv();
 378 #endif
 379                 if (ep->args == NULL)
 380                         err(1, NULL);
 381         }
 382         /* sort by idle time */
 383         if (sortidle && ehead != NULL) {
 384                 struct entry *from, *save;
 385
 386                 from = ehead;
 387                 ehead = NULL;
 388                 while (from != NULL) {
 389                         for (nextp = &ehead;
 390                             (*nextp) && from->idle >= (*nextp)->idle;
 391                             nextp = &(*nextp)->next)
 392                                 continue;
 393                         save = from;
 394                         from = from->next;
 395                         save->next = *nextp;
 396                         *nextp = save;
 397                 }
 398         }
 399
 400         for (ep = ehead; ep != NULL; ep = ep->next) {
 401                 char host_buf[UT_HOSTSIZE + 1];
 402                 struct sockaddr_storage ss;
 403                 struct sockaddr *sa = (struct sockaddr *)&ss;
 404                 struct sockaddr_in *lsin = (struct sockaddr_in *)&ss;
 405 #ifdef SUCKAGE
 406                 struct hostent *hp;
 407 #else
 408                 struct sockaddr_in6 *lsin6 = (struct sockaddr_in6 *)&ss;
 409 #endif
 410                 int isaddr;
 411
 412                 host_buf[UT_HOSTSIZE] = '\0';
 413                 strncpy(host_buf, ep->utmp.ut_host, UT_HOSTSIZE);
 414                 p = *host_buf ? host_buf : "-";
 415                 if ((x_suffix = strrchr(p, ':')) != NULL) {
 416                         if ((dot = strchr(x_suffix, '.')) != NULL &&
 417                             strchr(dot+1, '.') == NULL)
 418                                 *x_suffix++ = '\0';
 419                         else
 420                                 x_suffix = NULL;
 421                 }
 422                 if (!nflag) {
 423                         /* Attempt to change an IP address into a name */
 424                         isaddr = 0;
 425                         memset(&ss, '\0', sizeof(ss));
 426 #ifdef SUCKAGE
 427                         if (inet_aton(p, &lsin->sin_addr) ) {
 428                                 lsin->sin_len = sizeof(*lsin);
 429                                 lsin->sin_family = AF_INET;
 430                                 isaddr = 1;
 431                         }
 432
 433                         hp = gethostbyaddr((char *)&lsin->sin_addr, sizeof(lsin->sin_addr), AF_INET);
 434                         if( hp ) {
 435                                 p = hp->h_name;
 436                         }
 437 #else
 438                         if (inet_pton(AF_INET6, p, &lsin6->sin6_addr) == 1) {
 439                                 lsin6->sin6_len = sizeof(*lsin6);
 440                                 lsin6->sin6_family = AF_INET6;
 441                                 isaddr = 1;
 442                         } else if (inet_pton(AF_INET, p, &lsin->sin_addr) == 1) {
 443                                 lsin->sin_len = sizeof(*lsin);
 444                                 lsin->sin_family = AF_INET;
 445                                 isaddr = 1;
 446                         }
 447                         if (isaddr && realhostname_sa(fn, sizeof(fn), sa,
 448                             sa->sa_len) == HOSTNAME_FOUND)
 449                                 p = fn;
 450 #endif
 451                 }
 452                 if (x_suffix) {
 453                         (void)snprintf(buf, sizeof(buf), "%s:%s", p, x_suffix);
 454                         p = buf;
 455                 }
 456 #ifndef SUCKAGE
 457                 if (dflag) {
 458                         for (dkp = ep->dkp; dkp != NULL; dkp = debugproc(dkp)) {
 459                                 const char *ptr;
 460
 461                                 ptr = fmt_argv(kvm_getargv(kd, dkp, argwidth),
 462                                     dkp->ki_comm, MAXCOMLEN);
 463                                 if (ptr == NULL)
 464                                         ptr = "-";
 465                                 (void)printf("\t\t%-9d %s\n",
 466                                     dkp->ki_pid, ptr);
 467                         }
 468                 }
 469 #endif
 470                 (void)printf("%-*.*s %-*.*s %-*.*s ",
 471                     UT_NAMESIZE, UT_NAMESIZE, ep->utmp.ut_name,
 472                     UT_LINESIZE, UT_LINESIZE,
 473                     strncmp(ep->utmp.ut_line, "tty", 3) &&
 474                     strncmp(ep->utmp.ut_line, "cua", 3) ?
 475                     ep->utmp.ut_line : ep->utmp.ut_line + 3,
 476                     W_DISPHOSTSIZE, W_DISPHOSTSIZE, *p ? p : "-");
 477                 pr_attime(&ep->utmp.ut_time, &now);
 478                 longidle = pr_idle(ep->idle);
 479                 (void)printf("%.*s\n", argwidth - longidle, ep->args);
 480 #ifndef OLD_PROC
 481                 free(ep->args);
 482 #endif
 483         }
 484 #ifdef OLD_PROC
 485         (void)kvm_close(kd);
 486 #else
 487         free(kprocbuf);
 488 #endif
 489         exit(0);
 490 }
 491
 492 static void
 493 pr_header(nowp, nusers)
 494         time_t *nowp;
 495         int nusers;
 496 {
 497         double avenrun[3];
 498         time_t uptime;
 499         int days, hrs, i, mins, secs;
 500         int mib[2];
 501         size_t size;
 502         char buf[256];
 503
 504         /*
 505          * Print time of day.
 506          */
 507         (void)strftime(buf, sizeof(buf) - 1,
 508                        use_ampm ? "%l:%M%p" : "%k:%M", localtime(nowp));
 509         buf[sizeof(buf) - 1] = '\0';
 510         (void)printf("%s ", buf);
 511
 512         /*
 513          * Print how long system has been up.
 514          * (Found by looking getting "boottime" from the kernel)
 515          */
 516         mib[0] = CTL_KERN;
 517         mib[1] = KERN_BOOTTIME;
 518         size = sizeof(boottime);
 519         if (sysctl(mib, 2, &boottime, &size, NULL, 0) != -1 &&
 520             boottime.tv_sec != 0) {
 521                 uptime = now - boottime.tv_sec;
 522                 if (uptime > 60)
 523                         uptime += 30;
 524                 days = uptime / 86400;
 525                 uptime %= 86400;
 526                 hrs = uptime / 3600;
 527                 uptime %= 3600;
 528                 mins = uptime / 60;
 529                 secs = uptime % 60;
 530                 (void)printf(" up");
 531                 if (days > 0)
 532                         (void)printf(" %d day%s,", days, days > 1 ? "s" : "");
 533                 if (hrs > 0 && mins > 0)
 534                         (void)printf(" %2d:%02d,", hrs, mins);
 535                 else if (hrs > 0)
 536                         (void)printf(" %d hr%s,", hrs, hrs > 1 ? "s" : "");
 537                 else if (mins > 0)
 538                         (void)printf(" %d min%s,", mins, mins > 1 ? "s" : "");
 539                 else
 540                         (void)printf(" %d sec%s,", secs, secs > 1 ? "s" : "");
 541         }
 542
 543         /* Print number of users logged in to system */
 544         (void)printf(" %d user%s", nusers, nusers == 1 ? "" : "s");
 545
 546         /*
 547          * Print 1, 5, and 15 minute load averages.
 548          */
 549         if (getloadavg(avenrun, sizeof(avenrun) / sizeof(avenrun[0])) == -1)
 550                 (void)printf(", no load average information available\n");
 551         else {
 552                 (void)printf(", load averages:");
 553                 for (i = 0; i < (int)(sizeof(avenrun) / sizeof(avenrun[0])); i++) {
 554                         if (use_comma && i > 0)
 555                                 (void)printf(",");
 556                         (void)printf(" %.2f", avenrun[i]);
 557                 }
 558                 (void)printf("\n");
 559         }
 560 }
 561
 562 static struct stat *
 563 ttystat(line, sz)
 564         char *line;
 565         int sz;
 566 {
 567         static struct stat sb;
 568         char ttybuf[MAXPATHLEN];
 569
 570         (void)snprintf(ttybuf, sizeof(ttybuf), "%s%.*s", _PATH_DEV, sz, line);
 571         if (stat(ttybuf, &sb)) {
 572                 warn("%s", ttybuf);
 573                 return (NULL);
 574         }
 575         return (&sb);
 576 }
 577
 578 static void
 579 usage(wcmd)
 580         int wcmd;
 581 {
 582         if (wcmd)
 583                 (void)fprintf(stderr,
 584                     "usage: w [-dhin] [-M core] [-N system] [user ...]\n");
 585         else
 586                 (void)fprintf(stderr, "usage: uptime\n");
 587         exit(1);
 588 }
 589
 590 static int
 591 this_is_uptime(s)
 592         const char *s;
 593 {
 594         const char *u;
 595
 596         if ((u = strrchr(s, '/')) != NULL)
 597                 ++u;
 598         else
 599                 u = s;
 600         if (strcmp(u, "uptime") == 0)
 601                 return (0);
 602         return (-1);
 603 }
 604
 605 static void
 606 w_getargv(void)
 607 {
 608         int mib[3], argmax;
 609         size_t size;
 610         char *procargs, *sp, *np, *cp;
 611
 612         mib[0] = CTL_KERN;
 613         mib[1] = KERN_ARGMAX;
 614
 615         size = sizeof(argmax);
 616         if (sysctl(mib, 2, &argmax, &size, NULL, 0) == -1) {
 617                 goto ERROR;
 618         }
 619
 620         procargs = malloc(argmax);
 621         if (procargs == NULL) {
 622                 goto ERROR;
 623         }
 624
 625         mib[0] = CTL_KERN;
 626         mib[1] = KERN_PROCARGS;
 627         mib[2] = KI_PROC(ep)->p_pid;
 628
 629         size = (size_t)argmax;
 630         if (sysctl(mib, 3, procargs, &size, NULL, 0) == -1) {
 631                 goto ERROR_FREE;
 632         }
 633
 634         for (cp = procargs; cp < &procargs[size]; cp++) {
 635                 if (*cp == '\0') {
 636                         break;
 637                 }
 638         }
 639         if (cp == &procargs[size]) {
 640                 goto ERROR_FREE;
 641         }
 642
 643         sp = cp;
 644
 645         for (np = NULL; cp < &procargs[size]; cp++) {
 646                 if (*cp == '\0') {
 647                         if (np != NULL) {
 648                                 *np = ' ';
 649                         }
 650                         np = cp;
 651                 } else if (*cp == '=') {
 652                         break;
 653                 }
 654         }
 655
 656         for (np = sp; (np < &procargs[size]) && (*np == ' '); np++);
 657
 658         ep->args = strdup(np);
 659         free(procargs);
 660         return;
 661
 662 ERROR_FREE:
 663         free(procargs);
 664 ERROR:
 665 /*
 666         ep->args = malloc(2);
 667         ep->args[0] = '-';
 668         ep->args[1] = '\0';
 669 */
 670         asprintf(&ep->args, "%s", KI_PROC(ep)->p_comm);
 671         return;
 672 }