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. 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  * @(#) Copyright (c) 1980, 1991, 1993, 1994 The Regents of the University of California.  All rights reserved.
  34  * @(#)w.c      8.4 (Berkeley) 4/16/94
  35  * $FreeBSD: src/usr.bin/w/w.c,v 1.38.2.6 2002/03/12 19:51:51 phantom Exp $
  36  * $DragonFly: src/usr.bin/w/w.c,v 1.10 2007/02/18 16:15:24 corecode Exp $
  37  */
  38
  39 /*
  40  * w - print system status (who and what)
  41  *
  42  * This program is similar to the systat command on Tenex/Tops 10/20
  43  *
  44  */
  45 #include <sys/user.h>
  46 #include <sys/param.h>
  47 #include <sys/time.h>
  48 #include <sys/stat.h>
  49 #include <sys/sysctl.h>
  50 #include <sys/ioctl.h>
  51 #include <sys/socket.h>
  52 #include <sys/tty.h>
  53
  54 #include <machine/cpu.h>
  55 #include <netinet/in.h>
  56 #include <arpa/inet.h>
  57
  58 #include <ctype.h>
  59 #include <err.h>
  60 #include <errno.h>
  61 #include <fcntl.h>
  62 #include <kvm.h>
  63 #include <limits.h>
  64 #include <langinfo.h>
  65 #include <locale.h>
  66 #include <netdb.h>
  67 #include <nlist.h>
  68 #include <paths.h>
  69 #include <stdio.h>
  70 #include <stdlib.h>
  71 #include <string.h>
  72 #include <unistd.h>
  73 #ifdef SUPPORT_UTMP
  74 #include <utmp.h>
  75 #endif
  76 #ifdef SUPPORT_UTMPX
  77 #include <utmpx.h>
  78 #endif
  79 #include <vis.h>
  80
  81 #include <arpa/nameser.h>
  82 #include <resolv.h>
  83
  84 #include "extern.h"
  85
  86 struct timeval  boottime;
  87 #ifdef SUPPORT_UTMP
  88 struct utmp     utmp;
  89 #endif
  90 struct winsize  ws;
  91 kvm_t          *kd;
  92 time_t          now;            /* the current time of day */
  93 time_t          then;
  94 time_t          uptime;         /* time of last reboot & elapsed time since */
  95 int             ttywidth;       /* width of tty */
  96 int             argwidth;       /* width of tty */
  97 int             header = 1;     /* true if -h flag: don't print heading */
  98 int             nflag;          /* true if -n flag: don't convert addrs */
  99 int             dflag;          /* true if -d flag: output debug info */
 100 int             sortidle;       /* sort by idle time */
 101 int             use_ampm;       /* use AM/PM time */
 102 int             use_comma;      /* use comma as floats separator */
 103 char          **sel_users;      /* login array of particular users selected */
 104 char            domain[MAXHOSTNAMELEN];
 105 int maxname = 8, maxline = 3, maxhost = 16;
 106
 107 /*
 108  * One of these per active utmp entry.
 109  */
 110 struct  entry {
 111         struct  entry *next;
 112         char name[UTX_USERSIZE + 1];
 113         char line[UTX_LINESIZE + 1];
 114         char host[UTX_HOSTSIZE + 1];
 115         char type[2];
 116         struct timeval tv;
 117         dev_t   tdev;                   /* dev_t of terminal */
 118         time_t  idle;                   /* idle time of terminal in seconds */
 119         struct  kinfo_proc *kp;         /* `most interesting' proc */
 120         char    *args;                  /* arg list of interesting process */
 121         struct  kinfo_proc *dkp;        /* debug option proc list */
 122         pid_t   pid;                    /* pid or ~0 if not known */
 123 } *ep, *ehead = NULL, **nextp = &ehead;
 124
 125 #define debugproc(p) *((struct kinfo_proc **)&(p)->kp_spare[0])
 126
 127 static void              pr_header(time_t *, int);
 128 #if defined(SUPPORT_UTMP) || defined(SUPPORT_UTMPX)
 129 static struct stat      *ttystat(char *, int);
 130 static void     process(struct entry *);
 131 #endif
 132 static void              usage(int);
 133 static int               this_is_uptime(const char *s);
 134
 135 char *fmt_argv(char **, char *, int);   /* ../../bin/ps/fmt.c */
 136
 137 int
 138 main(int argc, char **argv)
 139 {
 140         struct kinfo_proc *kp;
 141         struct kinfo_proc *dkp;
 142         struct hostent *hp;
 143         in_addr_t l;
 144         int ch, i, nentries, nusers, wcmd, longidle, dropgid;
 145         char *memf, *nlistf, *p, *x;
 146 #ifdef SUPPORT_UTMP
 147         struct utmp *ut;
 148 #endif
 149 #ifdef SUPPORT_UTMPX
 150         struct utmpx *utx;
 151 #endif
 152         char buf[MAXHOSTNAMELEN], errbuf[_POSIX2_LINE_MAX];
 153
 154         (void)setlocale(LC_ALL, "");
 155         use_ampm = (*nl_langinfo(T_FMT_AMPM) != '\0');
 156         use_comma = (*nl_langinfo(RADIXCHAR) != ',');
 157
 158         /* Are we w(1) or uptime(1)? */
 159         if (this_is_uptime(argv[0]) == 0) {
 160                 wcmd = 0;
 161                 p = "";
 162         } else {
 163                 wcmd = 1;
 164                 p = "dhiflM:N:nsuw";
 165         }
 166
 167         dropgid = 0;
 168         memf = nlistf = _PATH_DEVNULL;
 169         while ((ch = getopt(argc, argv, p)) != -1)
 170                 switch (ch) {
 171                 case 'd':
 172                         dflag = 1;
 173                         break;
 174                 case 'h':
 175                         header = 0;
 176                         break;
 177                 case 'i':
 178                         sortidle = 1;
 179                         break;
 180                 case 'M':
 181                         header = 0;
 182                         memf = optarg;
 183                         dropgid = 1;
 184                         break;
 185                 case 'N':
 186                         nlistf = optarg;
 187                         dropgid = 1;
 188                         break;
 189                 case 'n':
 190                         nflag = 1;
 191                         break;
 192                 case 'f': case 'l': case 's': case 'u': case 'w':
 193                         warnx("[-flsuw] no longer supported");
 194                         /* FALLTHROUGH */
 195                 case '?':
 196                 default:
 197                         usage(wcmd);
 198                 }
 199         argc -= optind;
 200         argv += optind;
 201
 202         if (!(_res.options & RES_INIT))
 203                 res_init();
 204         _res.retrans = 2;       /* resolver timeout to 2 seconds per try */
 205         _res.retry = 1;         /* only try once.. */
 206
 207         /*
 208          * Discard setgid privileges if not the running kernel so that bad
 209          * guys can't print interesting stuff from kernel memory.
 210          */
 211         if (dropgid)
 212                 setgid(getgid());
 213
 214         if ((kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf)) == NULL)
 215                 errx(1, "%s", errbuf);
 216
 217         (void)time(&now);
 218 #ifdef SUPPORT_UTMPX
 219         setutxent();
 220 #endif
 221 #ifdef SUPPORT_UTMP
 222         setutent();
 223 #endif
 224
 225         if (*argv)
 226                 sel_users = argv;
 227
 228         nusers = 0;
 229 #ifdef SUPPORT_UTMPX
 230         while ((utx = getutxent()) != NULL) {
 231                 if (utx->ut_type != USER_PROCESS)
 232                         continue;
 233                 ++nusers;
 234
 235                 if (sel_users) {
 236                         int usermatch;
 237                         char **user;
 238
 239                         usermatch = 0;
 240                         for (user = sel_users; !usermatch && *user; user++)
 241                                 if (!strncmp(utx->ut_name, *user, UTX_USERSIZE))
 242                                         usermatch = 1;
 243                         if (!usermatch)
 244                                 continue;
 245                 }
 246
 247                 if ((ep = calloc(1, sizeof(struct entry))) == NULL)
 248                         err(1, NULL);
 249                 (void)memcpy(ep->name, utx->ut_name, sizeof(utx->ut_name));
 250                 (void)memcpy(ep->line, utx->ut_line, sizeof(utx->ut_line));
 251                 (void)memcpy(ep->host, utx->ut_host, sizeof(utx->ut_host));
 252                 ep->name[sizeof(utx->ut_name)] = '\0';
 253                 ep->line[sizeof(utx->ut_line)] = '\0';
 254                 ep->host[sizeof(utx->ut_host)] = '\0';
 255 #if 1
 256                 /* XXX: Actually we don't support the utx->ut_ss stuff yet */
 257                 if (!nflag || getnameinfo((struct sockaddr *)&utx->ut_ss,
 258                     utx->ut_ss.ss_len, ep->host, sizeof(ep->host), NULL, 0,
 259                     NI_NUMERICHOST) != 0) {
 260                         (void)memcpy(ep->host, utx->ut_host,
 261                             sizeof(utx->ut_host));
 262                         ep->host[sizeof(utx->ut_host)] = '\0';
 263                 }
 264 #endif
 265                 ep->type[0] = 'x';
 266                 ep->tv = utx->ut_tv;
 267                 ep->pid = utx->ut_pid;
 268
 269                 *nextp = ep;
 270                 nextp = &(ep->next);
 271                 if (wcmd != 0)
 272                         process(ep);
 273         }
 274 #endif
 275
 276 #ifdef SUPPORT_UTMP
 277         while ((ut = getutent()) != NULL) {
 278                 if (ut->ut_name[0] == '\0')
 279                         continue;
 280                 ++nusers;
 281                 if (sel_users) {
 282                         int usermatch;
 283                         char **user;
 284
 285                         usermatch = 0;
 286                         for (user = sel_users; !usermatch && *user; user++)
 287                                 if (!strncmp(ut->ut_name, *user, UT_NAMESIZE))
 288                                         usermatch = 1;
 289                         if (!usermatch)
 290                                 continue;
 291                 }
 292
 293                 /* Don't process entries that we have utmpx for */
 294                 for (ep = ehead; ep != NULL; ep = ep->next) {
 295                         if (strncmp(ep->line, ut->ut_line,
 296                             sizeof(ut->ut_line)) == 0)
 297                                 break;
 298                 }
 299                 if (ep != NULL) {
 300                         --nusers; /* Duplicate entry */
 301                         continue;
 302                 }
 303
 304                 if ((ep = calloc(1, sizeof(struct entry))) == NULL)
 305                         err(1, NULL);
 306                 (void)memcpy(ep->name, ut->ut_name, sizeof(ut->ut_name));
 307                 (void)memcpy(ep->line, ut->ut_line, sizeof(ut->ut_line));
 308                 (void)memcpy(ep->host, ut->ut_host, sizeof(ut->ut_host));
 309                 ep->name[sizeof(ut->ut_name)] = '\0';
 310                 ep->line[sizeof(ut->ut_line)] = '\0';
 311                 ep->host[sizeof(ut->ut_host)] = '\0';
 312                 ep->tv.tv_sec = ut->ut_time;
 313
 314                 *nextp = ep;
 315                 nextp = &(ep->next);
 316                 if (wcmd != 0)
 317                         process(ep);
 318         }
 319 #endif
 320
 321 #ifdef SUPPORT_UTMPX
 322         endutxent();
 323 #endif
 324 #ifdef SUPPORT_UTMP
 325         endutent();
 326 #endif
 327
 328         if (header || wcmd == 0) {
 329                 pr_header(&now, nusers);
 330                 if (wcmd == 0) {
 331                         (void)kvm_close(kd);
 332                         exit(0);
 333                 }
 334
 335 #define HEADER_USER             "USER"
 336 #define HEADER_TTY              "TTY"
 337 #define HEADER_FROM             "FROM"
 338 #define HEADER_LOGIN_IDLE       "LOGIN@  IDLE "
 339 #define HEADER_WHAT             "WHAT\n"
 340 #define WUSED  (maxname + maxline + maxhost + \
 341                 sizeof(HEADER_LOGIN_IDLE) + 3)  /* header width incl. spaces */
 342                 (void)printf("%-*.*s %-*.*s %-*.*s  %s",
 343                                 maxname, maxname, HEADER_USER,
 344                                 maxline, maxline, HEADER_TTY,
 345                                 maxhost, maxhost, HEADER_FROM,
 346                                 HEADER_LOGIN_IDLE HEADER_WHAT);
 347         }
 348
 349         if ((kp = kvm_getprocs(kd, KERN_PROC_ALL, 0, &nentries)) == NULL)
 350                 err(1, "%s", kvm_geterr(kd));
 351         for (i = 0; i < nentries; i++, kp++) {
 352                 if (kp->kp_stat == SIDL || kp->kp_stat == SZOMB)
 353                         continue;
 354                 for (ep = ehead; ep != NULL; ep = ep->next) {
 355                         if (ep->tdev == kp->kp_tdev) {
 356                                 /*
 357                                  * proc is associated with this terminal
 358                                  */
 359                                 if (ep->kp == NULL && kp->kp_pgid == kp->kp_tpgid) {
 360                                         /*
 361                                          * Proc is 'most interesting'
 362                                          */
 363                                         if (proc_compare(ep->kp, kp))
 364                                                 ep->kp = kp;
 365                                 }
 366                                 /*
 367                                  * Proc debug option info; add to debug
 368                                  * list using kinfo_proc kp_eproc.e_spare
 369                                  * as next pointer; ptr to ptr avoids the
 370                                  * ptr = long assumption.
 371                                  */
 372                                 dkp = ep->dkp;
 373                                 ep->dkp = kp;
 374                                 debugproc(kp) = dkp;
 375                         }
 376                         if (ep->pid != 0 && ep->pid == kp->kp_pid) {
 377                                 ep->kp = kp;
 378                                 break;
 379                         }
 380                 }
 381         }
 382         if ((ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) == -1 &&
 383              ioctl(STDERR_FILENO, TIOCGWINSZ, &ws) == -1 &&
 384              ioctl(STDIN_FILENO, TIOCGWINSZ, &ws) == -1) || ws.ws_col == 0)
 385                ttywidth = 79;
 386         else
 387                ttywidth = ws.ws_col - 1;
 388         argwidth = ttywidth - WUSED;
 389         if (argwidth < 4)
 390                 argwidth = 8;
 391         for (ep = ehead; ep != NULL; ep = ep->next) {
 392                 if (ep->kp == NULL) {
 393                         ep->args = "-";
 394                         continue;
 395                 }
 396                 ep->args = fmt_argv(kvm_getargv(kd, ep->kp, argwidth),
 397                     ep->kp->kp_comm, MAXCOMLEN);
 398                 if (ep->args == NULL)
 399                         err(1, NULL);
 400         }
 401         /* sort by idle time */
 402         if (sortidle && ehead != NULL) {
 403                 struct entry *from, *save;
 404
 405                 from = ehead;
 406                 ehead = NULL;
 407                 while (from != NULL) {
 408                         for (nextp = &ehead;
 409                             (*nextp) && from->idle >= (*nextp)->idle;
 410                             nextp = &(*nextp)->next)
 411                                 continue;
 412                         save = from;
 413                         from = from->next;
 414                         save->next = *nextp;
 415                         *nextp = save;
 416                 }
 417         }
 418 #if defined(SUPPORT_UTMP) && defined(SUPPORT_UTMPX)
 419         else if (ehead != NULL) {
 420                 struct entry *from = ehead, *save;
 421
 422                 ehead = NULL;
 423                 while (from != NULL) {
 424                         for (nextp = &ehead;
 425                             (*nextp) && strcmp(from->line, (*nextp)->line) > 0;
 426                             nextp = &(*nextp)->next)
 427                                 continue;
 428                         save = from;
 429                         from = from->next;
 430                         save->next = *nextp;
 431                         *nextp = save;
 432                 }
 433         }
 434 #endif
 435
 436         if (!nflag) {
 437                 if (gethostname(domain, sizeof(domain)) < 0 ||
 438                     (p = strchr(domain, '.')) == NULL)
 439                         domain[0] = '\0';
 440                 else {
 441                         domain[sizeof(domain) - 1] = '\0';
 442                         memmove(domain, p, strlen(p) + 1);
 443                 }
 444         }
 445
 446         for (ep = ehead; ep != NULL; ep = ep->next) {
 447                 char host_buf[UTX_HOSTSIZE + 1];
 448
 449                 host_buf[UTX_HOSTSIZE] = '\0';
 450                 strncpy(host_buf, ep->host, maxhost);
 451                 p = *host_buf ? host_buf : "-";
 452                 if ((x = strchr(p, ':')) != NULL)
 453                         *x++ = '\0';
 454                 if (!nflag && isdigit(*p) && (l = inet_addr(p)) != -1 &&
 455                     (hp = gethostbyaddr(&l, sizeof(l), AF_INET))) {
 456                         if (domain[0] != '\0') {
 457                                 p = hp->h_name;
 458                                 p += strlen(hp->h_name);
 459                                 p -= strlen(domain);
 460                                 if (p > hp->h_name &&
 461                                     strcasecmp(p, domain) == 0)
 462                                         *p = '\0';
 463                         }
 464                         p = hp->h_name;
 465                 }
 466                 if (nflag && *p && strcmp(p, "-") &&
 467                     inet_addr(p) == INADDR_NONE) {
 468                         hp = gethostbyname(p);
 469
 470                         if (hp != NULL) {
 471                                 struct in_addr in;
 472
 473                                 memmove(&in, hp->h_addr, sizeof(in));
 474                                 p = inet_ntoa(in);
 475                         }
 476                 }
 477                 if (x) {
 478                         (void)snprintf(buf, sizeof(buf), "%s:%s", p, x);
 479                         p = buf;
 480                 }
 481                 if (dflag) {
 482                         for (dkp = ep->dkp; dkp != NULL; dkp = debugproc(dkp)) {
 483                                 char *ptr;
 484
 485                                 ptr = fmt_argv(kvm_getargv(kd, dkp, argwidth),
 486                                     dkp->kp_comm, MAXCOMLEN);
 487                                 if (ptr == NULL)
 488                                         ptr = "-";
 489                                 (void)printf("\t\t%-9d %s\n",
 490                                     dkp->kp_pid, ptr);
 491                         }
 492                 }
 493                 (void)printf("%-*.*s %-*.*s %-*.*s ",
 494                     maxname, maxname, ep->name,
 495                     maxline, maxline,
 496                     strncmp(ep->line, "tty", 3) &&
 497                     strncmp(ep->line, "cua", 3) ?
 498                     ep->line : ep->line + 3,
 499                     maxhost, maxhost, *p ? p : "-");
 500                 then = (time_t)ep->tv.tv_sec;
 501                 pr_attime(&then, &now);
 502                 longidle = pr_idle(ep->idle);
 503                 (void)printf("%.*s\n", argwidth - longidle, ep->args);
 504         }
 505         (void)kvm_close(kd);
 506         exit(0);
 507 }
 508
 509 static void
 510 pr_header(time_t *nowp, int nusers)
 511 {
 512         double avenrun[3];
 513         time_t uptime;
 514         int days, hrs, i, mins, secs;
 515         int mib[2];
 516         size_t size;
 517         char buf[256];
 518
 519         /*
 520          * Print time of day.
 521          */
 522         (void)strftime(buf, sizeof(buf) - 1,
 523                        use_ampm ? "%l:%M%p" : "%k:%M", localtime(nowp));
 524         buf[sizeof(buf) - 1] = '\0';
 525         (void)printf("%s ", buf);
 526
 527         /*
 528          * Print how long system has been up.
 529          * (Found by looking at "boottime" from the kernel)
 530          */
 531         mib[0] = CTL_KERN;
 532         mib[1] = KERN_BOOTTIME;
 533         size = sizeof(boottime);
 534         if (sysctl(mib, 2, &boottime, &size, NULL, 0) != -1 &&
 535             boottime.tv_sec != 0) {
 536                 uptime = now - boottime.tv_sec;
 537                 if (uptime > 60)
 538                         uptime += 30;
 539                 days = uptime / 86400;
 540                 uptime %= 86400;
 541                 hrs = uptime / 3600;
 542                 uptime %= 3600;
 543                 mins = uptime / 60;
 544                 secs = uptime % 60;
 545                 (void)printf(" up");
 546                 if (days > 0)
 547                         (void)printf(" %d day%s,", days, days > 1 ? "s" : "");
 548                 if (hrs > 0 && mins > 0)
 549                         (void)printf(" %2d:%02d,", hrs, mins);
 550                 else if (hrs > 0)
 551                         (void)printf(" %d hr%s,", hrs, hrs > 1 ? "s" : "");
 552                 else if (mins > 0)
 553                         (void)printf(" %d min%s,", mins, mins > 1 ? "s" : "");
 554                 else
 555                         (void)printf(" %d sec%s,", secs, secs > 1 ? "s" : "");
 556         }
 557
 558         /* Print number of users logged in on system */
 559         (void)printf(" %d user%s", nusers, nusers == 1 ? "" : "s");
 560
 561         /*
 562          * Print 1, 5, and 15 minute load averages.
 563          */
 564         if (getloadavg(avenrun, sizeof(avenrun) / sizeof(avenrun[0])) == -1)
 565                 (void)printf(", no load average information available\n");
 566         else {
 567                 (void)printf(", load averages:");
 568                 for (i = 0; i < (sizeof(avenrun) / sizeof(avenrun[0])); i++) {
 569                         if (use_comma && i > 0)
 570                                 (void)printf(",");
 571                         (void)printf(" %.2f", avenrun[i]);
 572                 }
 573                 (void)printf("\n");
 574         }
 575 }
 576
 577 static struct stat *
 578 ttystat(char *line, int sz)
 579 {
 580         static struct stat sb;
 581         char ttybuf[MAXPATHLEN];
 582
 583         (void)snprintf(ttybuf, sizeof(ttybuf), "%s%.*s", _PATH_DEV, sz, line);
 584         if (stat(ttybuf, &sb)) {
 585                 warn("%s", ttybuf);
 586                 return (NULL);
 587         }
 588         return (&sb);
 589 }
 590
 591 static void
 592 usage(int wcmd)
 593 {
 594         if (wcmd)
 595                 (void)fprintf(stderr,
 596                     "usage: w [-dhin] [-M core] [-N system] [user ...]\n");
 597         else
 598                 (void)fprintf(stderr, "usage: uptime\n");
 599         exit(1);
 600 }
 601
 602 static int
 603 this_is_uptime(const char *s)
 604 {
 605         const char *u;
 606
 607         if ((u = strrchr(s, '/')) != NULL)
 608                 ++u;
 609         else
 610                 u = s;
 611         if (strcmp(u, "uptime") == 0)
 612                 return (0);
 613         return (-1);
 614 }
 615
 616 #if defined(SUPPORT_UTMP) || defined(SUPPORT_UTMPX)
 617 static void
 618 process(struct entry *ep)
 619 {
 620         struct stat *stp;
 621         time_t touched;
 622         int max;
 623
 624         if ((max = strlen(ep->name)) > maxname)
 625                 maxname = max;
 626         if ((max = strlen(ep->line)) > maxline)
 627                 maxline = max;
 628         if ((max = strlen(ep->host)) > maxhost)
 629                 maxhost = max;
 630
 631         ep->tdev = 0;
 632         ep->idle = (time_t)-1;
 633
 634         if (!(stp = ttystat(ep->line, maxline)))
 635                 return; /* corrupted record */
 636
 637         ep->tdev = stp->st_rdev;
 638 #ifdef CPU_CONSDEV
 639         /*
 640          * If this is the console device, attempt to ascertain
 641          * the true console device dev_t.
 642          */
 643         if (ep->tdev == 0) {
 644                 int mib[2];
 645                 size_t size;
 646
 647                 mib[0] = CTL_MACHDEP;
 648                 mib[1] = CPU_CONSDEV;
 649                 size = sizeof(dev_t);
 650                 (void)sysctl(mib, 2, &ep->tdev, &size, NULL, 0);
 651         }
 652 #endif
 653
 654         touched = stp->st_atime;
 655         if (touched < ep->tv.tv_sec) {
 656                 /* tty untouched since before login */
 657                 touched = ep->tv.tv_sec;
 658         }
 659         if ((ep->idle = now - touched) < 0)
 660                 ep->idle = 0;
 661 }
 662 #endif