usr.bin/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. Neither the name of the University nor the names of its contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  *
  29  * @(#) Copyright (c) 1980, 1991, 1993, 1994 The Regents of the University of California.  All rights reserved.
  30  * @(#)w.c      8.4 (Berkeley) 4/16/94
  31  * $FreeBSD: src/usr.bin/w/w.c,v 1.38.2.6 2002/03/12 19:51:51 phantom Exp $
  32  * $DragonFly: src/usr.bin/w/w.c,v 1.10 2007/02/18 16:15:24 corecode Exp $
  33  */
  34
  35 /*
  36  * w - print system status (who and what)
  37  *
  38  * This program is similar to the systat command on Tenex/Tops 10/20
  39  *
  40  */
  41 #include <sys/user.h>
  42 #include <sys/param.h>
  43 #include <sys/time.h>
  44 #include <sys/stat.h>
  45 #include <sys/sysctl.h>
  46 #include <sys/ioctl.h>
  47 #include <sys/socket.h>
  48 #include <sys/tty.h>
  49
  50 #include <machine/cpu.h>
  51 #include <netinet/in.h>
  52 #include <arpa/inet.h>
  53
  54 #include <ctype.h>
  55 #include <err.h>
  56 #include <errno.h>
  57 #include <fcntl.h>
  58 #include <kvm.h>
  59 #include <limits.h>
  60 #include <langinfo.h>
  61 #include <locale.h>
  62 #include <netdb.h>
  63 #include <nlist.h>
  64 #include <paths.h>
  65 #include <stdio.h>
  66 #include <stdlib.h>
  67 #include <string.h>
  68 #include <unistd.h>
  69 #ifdef SUPPORT_UTMP
  70 #include <utmp.h>
  71 #endif
  72 #ifdef SUPPORT_UTMPX
  73 #include <utmpx.h>
  74 #endif
  75 #include <vis.h>
  76
  77 #include <arpa/nameser.h>
  78 #include <resolv.h>
  79
  80 #include "extern.h"
  81
  82 struct timeval  boottime;
  83 #ifdef SUPPORT_UTMP
  84 struct utmp     utmp;
  85 #endif
  86 struct winsize  ws;
  87 kvm_t          *kd;
  88 time_t          now;            /* the current time of day */
  89 time_t          then;
  90 time_t          uptime;         /* time of last reboot & elapsed time since */
  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 char            domain[MAXHOSTNAMELEN];
 101 int maxname = 8, maxline = 3, maxhost = 16;
 102
 103 /*
 104  * One of these per active utmp entry.
 105  */
 106 struct  entry {
 107         struct  entry *next;
 108         char name[UTX_USERSIZE + 1];
 109         char line[UTX_LINESIZE + 1];
 110         char host[UTX_HOSTSIZE + 1];
 111         char type[2];
 112         struct timeval tv;
 113         dev_t   tdev;                   /* dev_t of terminal */
 114         time_t  idle;                   /* idle time of terminal in seconds */
 115         struct  kinfo_proc *kp;         /* `most interesting' proc */
 116         char    *args;                  /* arg list of interesting process */
 117         struct  kinfo_proc *dkp;        /* debug option proc list */
 118         pid_t   pid;                    /* pid or ~0 if not known */
 119 } *ep, *ehead = NULL, **nextp = &ehead;
 120
 121 #define debugproc(p) *((struct kinfo_proc **)&(p)->kp_spare[0])
 122
 123 static void              pr_header(time_t *, int);
 124 #if defined(SUPPORT_UTMP) || defined(SUPPORT_UTMPX)
 125 static struct stat      *ttystat(char *, int);
 126 static void     process(struct entry *);
 127 #endif
 128 static void              usage(int);
 129 static int               this_is_uptime(const char *s);
 130
 131 char *fmt_argv(char **, char *, int);   /* ../../bin/ps/fmt.c */
 132
 133 int
 134 main(int argc, char **argv)
 135 {
 136         struct kinfo_proc *kp;
 137         struct kinfo_proc *dkp;
 138         struct hostent *hp;
 139         in_addr_t l;
 140         int ch, i, nentries, nusers, wcmd, longidle, dropgid;
 141         char *memf, *nlistf, *p, *x;
 142 #ifdef SUPPORT_UTMP
 143         struct utmp *ut;
 144 #endif
 145 #ifdef SUPPORT_UTMPX
 146         struct utmpx *utx;
 147 #endif
 148         char buf[MAXHOSTNAMELEN], errbuf[_POSIX2_LINE_MAX];
 149
 150         (void)setlocale(LC_ALL, "");
 151         use_ampm = (*nl_langinfo(T_FMT_AMPM) != '\0');
 152         use_comma = (*nl_langinfo(RADIXCHAR) != ',');
 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 = _PATH_DEVNULL;
 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         if ((kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf)) == NULL)
 211                 errx(1, "%s", errbuf);
 212
 213         (void)time(&now);
 214 #ifdef SUPPORT_UTMPX
 215         setutxent();
 216 #endif
 217 #ifdef SUPPORT_UTMP
 218         setutent();
 219 #endif
 220
 221         if (*argv)
 222                 sel_users = argv;
 223
 224         nusers = 0;
 225 #ifdef SUPPORT_UTMPX
 226         while ((utx = getutxent()) != NULL) {
 227                 if (utx->ut_type != USER_PROCESS)
 228                         continue;
 229                 ++nusers;
 230
 231                 if (sel_users) {
 232                         int usermatch;
 233                         char **user;
 234
 235                         usermatch = 0;
 236                         for (user = sel_users; !usermatch && *user; user++)
 237                                 if (!strncmp(utx->ut_name, *user, UTX_USERSIZE))
 238                                         usermatch = 1;
 239                         if (!usermatch)
 240                                 continue;
 241                 }
 242
 243                 if ((ep = calloc(1, sizeof(struct entry))) == NULL)
 244                         err(1, NULL);
 245                 (void)memcpy(ep->name, utx->ut_name, sizeof(utx->ut_name));
 246                 (void)memcpy(ep->line, utx->ut_line, sizeof(utx->ut_line));
 247                 (void)memcpy(ep->host, utx->ut_host, sizeof(utx->ut_host));
 248                 ep->name[sizeof(utx->ut_name)] = '\0';
 249                 ep->line[sizeof(utx->ut_line)] = '\0';
 250                 ep->host[sizeof(utx->ut_host)] = '\0';
 251 #if 1
 252                 /* XXX: Actually we don't support the utx->ut_ss stuff yet */
 253                 if (!nflag || getnameinfo((struct sockaddr *)&utx->ut_ss,
 254                     utx->ut_ss.ss_len, ep->host, sizeof(ep->host), NULL, 0,
 255                     NI_NUMERICHOST) != 0) {
 256                         (void)memcpy(ep->host, utx->ut_host,
 257                             sizeof(utx->ut_host));
 258                         ep->host[sizeof(utx->ut_host)] = '\0';
 259                 }
 260 #endif
 261                 ep->type[0] = 'x';
 262                 ep->tv = utx->ut_tv;
 263                 ep->pid = utx->ut_pid;
 264
 265                 *nextp = ep;
 266                 nextp = &(ep->next);
 267                 if (wcmd != 0)
 268                         process(ep);
 269         }
 270 #endif
 271
 272 #ifdef SUPPORT_UTMP
 273         while ((ut = getutent()) != NULL) {
 274                 if (ut->ut_name[0] == '\0')
 275                         continue;
 276                 ++nusers;
 277                 if (sel_users) {
 278                         int usermatch;
 279                         char **user;
 280
 281                         usermatch = 0;
 282                         for (user = sel_users; !usermatch && *user; user++)
 283                                 if (!strncmp(ut->ut_name, *user, UT_NAMESIZE))
 284                                         usermatch = 1;
 285                         if (!usermatch)
 286                                 continue;
 287                 }
 288
 289                 /* Don't process entries that we have utmpx for */
 290                 for (ep = ehead; ep != NULL; ep = ep->next) {
 291                         if (strncmp(ep->line, ut->ut_line,
 292                             sizeof(ut->ut_line)) == 0)
 293                                 break;
 294                 }
 295                 if (ep != NULL) {
 296                         --nusers; /* Duplicate entry */
 297                         continue;
 298                 }
 299
 300                 if ((ep = calloc(1, sizeof(struct entry))) == NULL)
 301                         err(1, NULL);
 302                 (void)memcpy(ep->name, ut->ut_name, sizeof(ut->ut_name));
 303                 (void)memcpy(ep->line, ut->ut_line, sizeof(ut->ut_line));
 304                 (void)memcpy(ep->host, ut->ut_host, sizeof(ut->ut_host));
 305                 ep->name[sizeof(ut->ut_name)] = '\0';
 306                 ep->line[sizeof(ut->ut_line)] = '\0';
 307                 ep->host[sizeof(ut->ut_host)] = '\0';
 308                 ep->tv.tv_sec = ut->ut_time;
 309
 310                 *nextp = ep;
 311                 nextp = &(ep->next);
 312                 if (wcmd != 0)
 313                         process(ep);
 314         }
 315 #endif
 316
 317 #ifdef SUPPORT_UTMPX
 318         endutxent();
 319 #endif
 320 #ifdef SUPPORT_UTMP
 321         endutent();
 322 #endif
 323
 324         if (header || wcmd == 0) {
 325                 pr_header(&now, nusers);
 326                 if (wcmd == 0) {
 327                         (void)kvm_close(kd);
 328                         exit(0);
 329                 }
 330
 331 #define HEADER_USER             "USER"
 332 #define HEADER_TTY              "TTY"
 333 #define HEADER_FROM             "FROM"
 334 #define HEADER_LOGIN_IDLE       "LOGIN@  IDLE "
 335 #define HEADER_WHAT             "WHAT\n"
 336 #define WUSED  (maxname + maxline + maxhost + \
 337                 sizeof(HEADER_LOGIN_IDLE) + 3)  /* header width incl. spaces */
 338                 (void)printf("%-*.*s %-*.*s %-*.*s  %s",
 339                                 maxname, maxname, HEADER_USER,
 340                                 maxline, maxline, HEADER_TTY,
 341                                 maxhost, maxhost, HEADER_FROM,
 342                                 HEADER_LOGIN_IDLE HEADER_WHAT);
 343         }
 344
 345         if ((kp = kvm_getprocs(kd, KERN_PROC_ALL, 0, &nentries)) == NULL)
 346                 err(1, "%s", kvm_geterr(kd));
 347         for (i = 0; i < nentries; i++, kp++) {
 348                 if (kp->kp_stat == SIDL || kp->kp_stat == SZOMB)
 349                         continue;
 350                 for (ep = ehead; ep != NULL; ep = ep->next) {
 351                         if (ep->tdev == kp->kp_tdev) {
 352                                 /*
 353                                  * proc is associated with this terminal
 354                                  */
 355                                 if (ep->kp == NULL && kp->kp_pgid == kp->kp_tpgid) {
 356                                         /*
 357                                          * Proc is 'most interesting'
 358                                          */
 359                                         if (proc_compare(ep->kp, kp))
 360                                                 ep->kp = kp;
 361                                 }
 362                                 /*
 363                                  * Proc debug option info; add to debug
 364                                  * list using kinfo_proc kp_eproc.e_spare
 365                                  * as next pointer; ptr to ptr avoids the
 366                                  * ptr = long assumption.
 367                                  */
 368                                 dkp = ep->dkp;
 369                                 ep->dkp = kp;
 370                                 debugproc(kp) = dkp;
 371                         }
 372                         if (ep->pid != 0 && ep->pid == kp->kp_pid) {
 373                                 ep->kp = kp;
 374                                 break;
 375                         }
 376                 }
 377         }
 378         if ((ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) == -1 &&
 379              ioctl(STDERR_FILENO, TIOCGWINSZ, &ws) == -1 &&
 380              ioctl(STDIN_FILENO, TIOCGWINSZ, &ws) == -1) || ws.ws_col == 0)
 381                ttywidth = 79;
 382         else
 383                ttywidth = ws.ws_col - 1;
 384         argwidth = ttywidth - WUSED;
 385         if (argwidth < 4)
 386                 argwidth = 8;
 387         for (ep = ehead; ep != NULL; ep = ep->next) {
 388                 if (ep->kp == NULL) {
 389                         ep->args = "-";
 390                         continue;
 391                 }
 392                 ep->args = fmt_argv(kvm_getargv(kd, ep->kp, argwidth),
 393                     ep->kp->kp_comm, MAXCOMLEN);
 394                 if (ep->args == NULL)
 395                         err(1, NULL);
 396         }
 397         /* sort by idle time */
 398         if (sortidle && ehead != NULL) {
 399                 struct entry *from, *save;
 400
 401                 from = ehead;
 402                 ehead = NULL;
 403                 while (from != NULL) {
 404                         for (nextp = &ehead;
 405                             (*nextp) && from->idle >= (*nextp)->idle;
 406                             nextp = &(*nextp)->next)
 407                                 continue;
 408                         save = from;
 409                         from = from->next;
 410                         save->next = *nextp;
 411                         *nextp = save;
 412                 }
 413         }
 414 #if defined(SUPPORT_UTMP) && defined(SUPPORT_UTMPX)
 415         else if (ehead != NULL) {
 416                 struct entry *from = ehead, *save;
 417
 418                 ehead = NULL;
 419                 while (from != NULL) {
 420                         for (nextp = &ehead;
 421                             (*nextp) && strcmp(from->line, (*nextp)->line) > 0;
 422                             nextp = &(*nextp)->next)
 423                                 continue;
 424                         save = from;
 425                         from = from->next;
 426                         save->next = *nextp;
 427                         *nextp = save;
 428                 }
 429         }
 430 #endif
 431
 432         if (!nflag) {
 433                 if (gethostname(domain, sizeof(domain)) < 0 ||
 434                     (p = strchr(domain, '.')) == NULL)
 435                         domain[0] = '\0';
 436                 else {
 437                         domain[sizeof(domain) - 1] = '\0';
 438                         memmove(domain, p, strlen(p) + 1);
 439                 }
 440         }
 441
 442         for (ep = ehead; ep != NULL; ep = ep->next) {
 443                 char host_buf[UTX_HOSTSIZE + 1];
 444
 445                 host_buf[UTX_HOSTSIZE] = '\0';
 446                 strncpy(host_buf, ep->host, maxhost);
 447                 p = *host_buf ? host_buf : "-";
 448                 if ((x = strchr(p, ':')) != NULL)
 449                         *x++ = '\0';
 450                 if (!nflag && isdigit(*p) && (l = inet_addr(p)) != -1 &&
 451                     (hp = gethostbyaddr(&l, sizeof(l), AF_INET))) {
 452                         if (domain[0] != '\0') {
 453                                 p = hp->h_name;
 454                                 p += strlen(hp->h_name);
 455                                 p -= strlen(domain);
 456                                 if (p > hp->h_name &&
 457                                     strcasecmp(p, domain) == 0)
 458                                         *p = '\0';
 459                         }
 460                         p = hp->h_name;
 461                 }
 462                 if (nflag && *p && strcmp(p, "-") &&
 463                     inet_addr(p) == INADDR_NONE) {
 464                         hp = gethostbyname(p);
 465
 466                         if (hp != NULL) {
 467                                 struct in_addr in;
 468
 469                                 memmove(&in, hp->h_addr, sizeof(in));
 470                                 p = inet_ntoa(in);
 471                         }
 472                 }
 473                 if (x) {
 474                         (void)snprintf(buf, sizeof(buf), "%s:%s", p, x);
 475                         p = buf;
 476                 }
 477                 if (dflag) {
 478                         for (dkp = ep->dkp; dkp != NULL; dkp = debugproc(dkp)) {
 479                                 char *ptr;
 480
 481                                 ptr = fmt_argv(kvm_getargv(kd, dkp, argwidth),
 482                                     dkp->kp_comm, MAXCOMLEN);
 483                                 if (ptr == NULL)
 484                                         ptr = "-";
 485                                 (void)printf("\t\t%-9d %s\n",
 486                                     dkp->kp_pid, ptr);
 487                         }
 488                 }
 489                 (void)printf("%-*.*s %-*.*s %-*.*s ",
 490                     maxname, maxname, ep->name,
 491                     maxline, maxline,
 492                     strncmp(ep->line, "tty", 3) &&
 493                     strncmp(ep->line, "cua", 3) ?
 494                     ep->line : ep->line + 3,
 495                     maxhost, maxhost, *p ? p : "-");
 496                 then = (time_t)ep->tv.tv_sec;
 497                 pr_attime(&then, &now);
 498                 longidle = pr_idle(ep->idle);
 499                 (void)printf("%.*s\n", argwidth - longidle, ep->args);
 500         }
 501         (void)kvm_close(kd);
 502         exit(0);
 503 }
 504
 505 static void
 506 pr_header(time_t *nowp, int nusers)
 507 {
 508         double avenrun[3];
 509         time_t uptime;
 510         int days, hrs, i, mins, secs;
 511         int mib[2];
 512         size_t size;
 513         char buf[256];
 514
 515         /*
 516          * Print time of day.
 517          */
 518         (void)strftime(buf, sizeof(buf) - 1,
 519                        use_ampm ? "%l:%M%p" : "%k:%M", localtime(nowp));
 520         buf[sizeof(buf) - 1] = '\0';
 521         (void)printf("%s ", buf);
 522
 523         /*
 524          * Print how long system has been up.
 525          * (Found by looking at "boottime" from the kernel)
 526          */
 527         mib[0] = CTL_KERN;
 528         mib[1] = KERN_BOOTTIME;
 529         size = sizeof(boottime);
 530         if (sysctl(mib, 2, &boottime, &size, NULL, 0) != -1 &&
 531             boottime.tv_sec != 0) {
 532                 uptime = now - boottime.tv_sec;
 533                 if (uptime > 60)
 534                         uptime += 30;
 535                 days = uptime / 86400;
 536                 uptime %= 86400;
 537                 hrs = uptime / 3600;
 538                 uptime %= 3600;
 539                 mins = uptime / 60;
 540                 secs = uptime % 60;
 541                 (void)printf(" up");
 542                 if (days > 0)
 543                         (void)printf(" %d day%s,", days, days > 1 ? "s" : "");
 544                 if (hrs > 0 && mins > 0)
 545                         (void)printf(" %2d:%02d,", hrs, mins);
 546                 else if (hrs > 0)
 547                         (void)printf(" %d hr%s,", hrs, hrs > 1 ? "s" : "");
 548                 else if (mins > 0)
 549                         (void)printf(" %d min%s,", mins, mins > 1 ? "s" : "");
 550                 else
 551                         (void)printf(" %d sec%s,", secs, secs > 1 ? "s" : "");
 552         }
 553
 554         /* Print number of users logged in on system */
 555         (void)printf(" %d user%s", nusers, nusers == 1 ? "" : "s");
 556
 557         /*
 558          * Print 1, 5, and 15 minute load averages.
 559          */
 560         if (getloadavg(avenrun, sizeof(avenrun) / sizeof(avenrun[0])) == -1)
 561                 (void)printf(", no load average information available\n");
 562         else {
 563                 (void)printf(", load averages:");
 564                 for (i = 0; i < (sizeof(avenrun) / sizeof(avenrun[0])); i++) {
 565                         if (use_comma && i > 0)
 566                                 (void)printf(",");
 567                         (void)printf(" %.2f", avenrun[i]);
 568                 }
 569                 (void)printf("\n");
 570         }
 571 }
 572
 573 static struct stat *
 574 ttystat(char *line, int sz)
 575 {
 576         static struct stat sb;
 577         char ttybuf[MAXPATHLEN];
 578
 579         (void)snprintf(ttybuf, sizeof(ttybuf), "%s%.*s", _PATH_DEV, sz, line);
 580         if (stat(ttybuf, &sb)) {
 581                 warn("%s", ttybuf);
 582                 return (NULL);
 583         }
 584         return (&sb);
 585 }
 586
 587 static void
 588 usage(int wcmd)
 589 {
 590         if (wcmd)
 591                 (void)fprintf(stderr,
 592                     "usage: w [-dhin] [-M core] [-N system] [user ...]\n");
 593         else
 594                 (void)fprintf(stderr, "usage: uptime\n");
 595         exit(1);
 596 }
 597
 598 static int
 599 this_is_uptime(const char *s)
 600 {
 601         const char *u;
 602
 603         if ((u = strrchr(s, '/')) != NULL)
 604                 ++u;
 605         else
 606                 u = s;
 607         if (strcmp(u, "uptime") == 0)
 608                 return (0);
 609         return (-1);
 610 }
 611
 612 #if defined(SUPPORT_UTMP) || defined(SUPPORT_UTMPX)
 613 static void
 614 process(struct entry *ep)
 615 {
 616         struct stat *stp;
 617         time_t touched;
 618         int max;
 619
 620         if ((max = strlen(ep->name)) > maxname)
 621                 maxname = max;
 622         if ((max = strlen(ep->line)) > maxline)
 623                 maxline = max;
 624         if ((max = strlen(ep->host)) > maxhost)
 625                 maxhost = max;
 626
 627         ep->tdev = 0;
 628         ep->idle = (time_t)-1;
 629
 630         if (!(stp = ttystat(ep->line, maxline)))
 631                 return; /* corrupted record */
 632
 633         ep->tdev = stp->st_rdev;
 634 #ifdef CPU_CONSDEV
 635         /*
 636          * If this is the console device, attempt to ascertain
 637          * the true console device dev_t.
 638          */
 639         if (ep->tdev == 0) {
 640                 int mib[2];
 641                 size_t size;
 642
 643                 mib[0] = CTL_MACHDEP;
 644                 mib[1] = CPU_CONSDEV;
 645                 size = sizeof(dev_t);
 646                 (void)sysctl(mib, 2, &ep->tdev, &size, NULL, 0);
 647         }
 648 #endif
 649
 650         touched = stp->st_atime;
 651         if (touched < ep->tv.tv_sec) {
 652                 /* tty untouched since before login */
 653                 touched = ep->tv.tv_sec;
 654         }
 655         if ((ep->idle = now - touched) < 0)
 656                 ep->idle = 0;
 657 }
 658 #endif