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 * 4. 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 30 #include <sys/cdefs.h> 31 32 __FBSDID("$FreeBSD$"); 33 34 #ifndef lint 35 static const char copyright[] = 36 "@(#) Copyright (c) 1980, 1991, 1993, 1994\n\ 37 The Regents of the University of California. All rights reserved.\n"; 38 #endif 39 40 #ifndef lint 41 static const char sccsid[] = "@(#)w.c 8.4 (Berkeley) 4/16/94"; 42 #endif 43 44 /* 45 * w - print system status (who and what) 46 * 47 * This program is similar to the systat command on Tenex/Tops 10/20 48 * 49 */ 50 #include <sys/param.h> 51 #include <sys/time.h> 52 #include <sys/stat.h> 53 #include <sys/sysctl.h> 54 #include <sys/proc.h> 55 #include <sys/user.h> 56 #include <sys/ioctl.h> 57 #include <sys/socket.h> 58 #include <sys/tty.h> 59 60 #include <machine/cpu.h> 61 #include <netinet/in.h> 62 #include <arpa/inet.h> 63 #include <arpa/nameser.h> 64 65 #include <ctype.h> 66 #include <err.h> 67 #include <errno.h> 68 #include <fcntl.h> 69 #include <kvm.h> 70 #include <langinfo.h> 71 #include <libutil.h> 72 #include <limits.h> 73 #include <locale.h> 74 #include <netdb.h> 75 #include <nlist.h> 76 #include <paths.h> 77 #include <resolv.h> 78 #include <stdio.h> 79 #include <stdlib.h> 80 #include <string.h> 81 #include <timeconv.h> 82 #include <unistd.h> 83 #include <utmpx.h> 84 #include <vis.h> 85 86 #include "extern.h" 87 88 static struct utmpx *utmp; 89 static struct winsize ws; 90 static kvm_t *kd; 91 static time_t now; /* the current time of day */ 92 static int ttywidth; /* width of tty */ 93 static int argwidth; /* width of tty */ 94 static int header = 1; /* true if -h flag: don't print heading */ 95 static int nflag; /* true if -n flag: don't convert addrs */ 96 static int dflag; /* true if -d flag: output debug info */ 97 static int sortidle; /* sort by idle time */ 98 int use_ampm; /* use AM/PM time */ 99 static int use_comma; /* use comma as floats separator */ 100 static char **sel_users; /* login array of particular users selected */ 101 102 /* 103 * One of these per active utmp entry. 104 */ 105 static struct entry { 106 struct entry *next; 107 struct utmpx utmp; 108 dev_t tdev; /* dev_t of terminal */ 109 time_t idle; /* idle time of terminal in seconds */ 110 struct kinfo_proc *kp; /* `most interesting' proc */ 111 char *args; /* arg list of interesting process */ 112 struct kinfo_proc *dkp; /* debug option proc list */ 113 } *ep, *ehead = NULL, **nextp = &ehead; 114 115 #define debugproc(p) *(&((struct kinfo_proc *)p)->ki_udata) 116 117 #define W_DISPUSERSIZE 10 118 #define W_DISPLINESIZE 8 119 #define W_DISPHOSTSIZE 24 120 121 static void pr_header(time_t *, int); 122 static struct stat *ttystat(char *); 123 static void usage(int); 124 static int this_is_uptime(const char *s); 125 126 char *fmt_argv(char **, char *, char *, size_t); /* ../../bin/ps/fmt.c */ 127 128 int 129 main(int argc, char *argv[]) 130 { 131 struct kinfo_proc *kp; 132 struct kinfo_proc *dkp; 133 struct stat *stp; 134 time_t touched; 135 int ch, i, nentries, nusers, wcmd, longidle, longattime, dropgid; 136 const char *memf, *nlistf, *p; 137 char *x_suffix; 138 char buf[MAXHOSTNAMELEN], errbuf[_POSIX2_LINE_MAX]; 139 char fn[MAXHOSTNAMELEN]; 140 char *dot; 141 142 (void)setlocale(LC_ALL, ""); 143 use_ampm = (*nl_langinfo(T_FMT_AMPM) != '\0'); 144 use_comma = (*nl_langinfo(RADIXCHAR) != ','); 145 146 /* Are we w(1) or uptime(1)? */ 147 if (this_is_uptime(argv[0]) == 0) { 148 wcmd = 0; 149 p = ""; 150 } else { 151 wcmd = 1; 152 p = "dhiflM:N:nsuw"; 153 } 154 155 dropgid = 0; 156 memf = _PATH_DEVNULL; 157 nlistf = NULL; 158 while ((ch = getopt(argc, argv, p)) != -1) 159 switch (ch) { 160 case 'd': 161 dflag = 1; 162 break; 163 case 'h': 164 header = 0; 165 break; 166 case 'i': 167 sortidle = 1; 168 break; 169 case 'M': 170 header = 0; 171 memf = optarg; 172 dropgid = 1; 173 break; 174 case 'N': 175 nlistf = optarg; 176 dropgid = 1; 177 break; 178 case 'n': 179 nflag = 1; 180 break; 181 case 'f': case 'l': case 's': case 'u': case 'w': 182 warnx("[-flsuw] no longer supported"); 183 /* FALLTHROUGH */ 184 case '?': 185 default: 186 usage(wcmd); 187 } 188 argc -= optind; 189 argv += optind; 190 191 if (!(_res.options & RES_INIT)) 192 res_init(); 193 _res.retrans = 2; /* resolver timeout to 2 seconds per try */ 194 _res.retry = 1; /* only try once.. */ 195 196 /* 197 * Discard setgid privileges if not the running kernel so that bad 198 * guys can't print interesting stuff from kernel memory. 199 */ 200 if (dropgid) 201 setgid(getgid()); 202 203 if ((kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf)) == NULL) 204 errx(1, "%s", errbuf); 205 206 (void)time(&now); 207 208 if (*argv) 209 sel_users = argv; 210 211 setutxent(); 212 for (nusers = 0; (utmp = getutxent()) != NULL;) { 213 if (utmp->ut_type != USER_PROCESS) 214 continue; 215 if (!(stp = ttystat(utmp->ut_line))) 216 continue; /* corrupted record */ 217 ++nusers; 218 if (wcmd == 0) 219 continue; 220 if (sel_users) { 221 int usermatch; 222 char **user; 223 224 usermatch = 0; 225 for (user = sel_users; !usermatch && *user; user++) 226 if (!strcmp(utmp->ut_user, *user)) 227 usermatch = 1; 228 if (!usermatch) 229 continue; 230 } 231 if ((ep = calloc(1, sizeof(struct entry))) == NULL) 232 errx(1, "calloc"); 233 *nextp = ep; 234 nextp = &ep->next; 235 memmove(&ep->utmp, utmp, sizeof *utmp); 236 ep->tdev = stp->st_rdev; 237 /* 238 * If this is the console device, attempt to ascertain 239 * the true console device dev_t. 240 */ 241 if (ep->tdev == 0) { 242 size_t size; 243 244 size = sizeof(dev_t); 245 (void)sysctlbyname("machdep.consdev", &ep->tdev, &size, NULL, 0); 246 } 247 touched = stp->st_atime; 248 if (touched < ep->utmp.ut_tv.tv_sec) { 249 /* tty untouched since before login */ 250 touched = ep->utmp.ut_tv.tv_sec; 251 } 252 if ((ep->idle = now - touched) < 0) 253 ep->idle = 0; 254 } 255 endutxent(); 256 257 if (header || wcmd == 0) { 258 pr_header(&now, nusers); 259 if (wcmd == 0) { 260 (void)kvm_close(kd); 261 exit(0); 262 } 263 264 #define HEADER_USER "USER" 265 #define HEADER_TTY "TTY" 266 #define HEADER_FROM "FROM" 267 #define HEADER_LOGIN_IDLE "LOGIN@ IDLE " 268 #define HEADER_WHAT "WHAT\n" 269 #define WUSED (W_DISPUSERSIZE + W_DISPLINESIZE + W_DISPHOSTSIZE + \ 270 sizeof(HEADER_LOGIN_IDLE) + 3) /* header width incl. spaces */ 271 (void)printf("%-*.*s %-*.*s %-*.*s %s", 272 W_DISPUSERSIZE, W_DISPUSERSIZE, HEADER_USER, 273 W_DISPLINESIZE, W_DISPLINESIZE, HEADER_TTY, 274 W_DISPHOSTSIZE, W_DISPHOSTSIZE, HEADER_FROM, 275 HEADER_LOGIN_IDLE HEADER_WHAT); 276 } 277 278 if ((kp = kvm_getprocs(kd, KERN_PROC_ALL, 0, &nentries)) == NULL) 279 err(1, "%s", kvm_geterr(kd)); 280 for (i = 0; i < nentries; i++, kp++) { 281 if (kp->ki_stat == SIDL || kp->ki_stat == SZOMB || 282 kp->ki_tdev == NODEV) 283 continue; 284 for (ep = ehead; ep != NULL; ep = ep->next) { 285 if (ep->tdev == kp->ki_tdev) { 286 /* 287 * proc is associated with this terminal 288 */ 289 if (ep->kp == NULL && kp->ki_pgid == kp->ki_tpgid) { 290 /* 291 * Proc is 'most interesting' 292 */ 293 if (proc_compare(ep->kp, kp)) 294 ep->kp = kp; 295 } 296 /* 297 * Proc debug option info; add to debug 298 * list using kinfo_proc ki_spare[0] 299 * as next pointer; ptr to ptr avoids the 300 * ptr = long assumption. 301 */ 302 dkp = ep->dkp; 303 ep->dkp = kp; 304 debugproc(kp) = dkp; 305 } 306 } 307 } 308 if ((ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) == -1 && 309 ioctl(STDERR_FILENO, TIOCGWINSZ, &ws) == -1 && 310 ioctl(STDIN_FILENO, TIOCGWINSZ, &ws) == -1) || ws.ws_col == 0) 311 ttywidth = 79; 312 else 313 ttywidth = ws.ws_col - 1; 314 argwidth = ttywidth - WUSED; 315 if (argwidth < 4) 316 argwidth = 8; 317 for (ep = ehead; ep != NULL; ep = ep->next) { 318 if (ep->kp == NULL) { 319 ep->args = strdup("-"); 320 continue; 321 } 322 ep->args = fmt_argv(kvm_getargv(kd, ep->kp, argwidth), 323 ep->kp->ki_comm, NULL, MAXCOMLEN); 324 if (ep->args == NULL) 325 err(1, NULL); 326 } 327 /* sort by idle time */ 328 if (sortidle && ehead != NULL) { 329 struct entry *from, *save; 330 331 from = ehead; 332 ehead = NULL; 333 while (from != NULL) { 334 for (nextp = &ehead; 335 (*nextp) && from->idle >= (*nextp)->idle; 336 nextp = &(*nextp)->next) 337 continue; 338 save = from; 339 from = from->next; 340 save->next = *nextp; 341 *nextp = save; 342 } 343 } 344 345 for (ep = ehead; ep != NULL; ep = ep->next) { 346 struct addrinfo hints, *res; 347 struct sockaddr_storage ss; 348 struct sockaddr *sa = (struct sockaddr *)&ss; 349 struct sockaddr_in *lsin = (struct sockaddr_in *)&ss; 350 struct sockaddr_in6 *lsin6 = (struct sockaddr_in6 *)&ss; 351 time_t t; 352 int isaddr; 353 354 p = *ep->utmp.ut_host ? ep->utmp.ut_host : "-"; 355 if ((x_suffix = strrchr(p, ':')) != NULL) { 356 if ((dot = strchr(x_suffix, '.')) != NULL && 357 strchr(dot+1, '.') == NULL) 358 *x_suffix++ = '\0'; 359 else 360 x_suffix = NULL; 361 } 362 363 isaddr = 0; 364 memset(&ss, '\0', sizeof(ss)); 365 if (inet_pton(AF_INET6, p, &lsin6->sin6_addr) == 1) { 366 lsin6->sin6_len = sizeof(*lsin6); 367 lsin6->sin6_family = AF_INET6; 368 isaddr = 1; 369 } else if (inet_pton(AF_INET, p, &lsin->sin_addr) == 1) { 370 lsin->sin_len = sizeof(*lsin); 371 lsin->sin_family = AF_INET; 372 isaddr = 1; 373 } 374 if (!nflag) { 375 /* Attempt to change an IP address into a name */ 376 if (isaddr && realhostname_sa(fn, sizeof(fn), sa, 377 sa->sa_len) == HOSTNAME_FOUND) 378 p = fn; 379 } else if (!isaddr) { 380 /* 381 * If a host has only one A/AAAA RR, change a 382 * name into an IP address 383 */ 384 memset(&hints, 0, sizeof(hints)); 385 hints.ai_flags = AI_PASSIVE; 386 hints.ai_family = AF_UNSPEC; 387 hints.ai_socktype = SOCK_STREAM; 388 if (getaddrinfo(p, NULL, &hints, &res) == 0) { 389 if (res->ai_next == NULL && 390 getnameinfo(res->ai_addr, res->ai_addrlen, 391 fn, sizeof(fn), NULL, 0, 392 NI_NUMERICHOST) == 0) 393 p = fn; 394 freeaddrinfo(res); 395 } 396 } 397 398 if (x_suffix) { 399 (void)snprintf(buf, sizeof(buf), "%s:%s", p, x_suffix); 400 p = buf; 401 } 402 if (dflag) { 403 for (dkp = ep->dkp; dkp != NULL; dkp = debugproc(dkp)) { 404 const char *ptr; 405 406 ptr = fmt_argv(kvm_getargv(kd, dkp, argwidth), 407 dkp->ki_comm, NULL, MAXCOMLEN); 408 if (ptr == NULL) 409 ptr = "-"; 410 (void)printf("\t\t%-9d %s\n", 411 dkp->ki_pid, ptr); 412 } 413 } 414 (void)printf("%-*.*s %-*.*s %-*.*s ", 415 W_DISPUSERSIZE, W_DISPUSERSIZE, ep->utmp.ut_user, 416 W_DISPLINESIZE, W_DISPLINESIZE, 417 *ep->utmp.ut_line ? 418 (strncmp(ep->utmp.ut_line, "tty", 3) && 419 strncmp(ep->utmp.ut_line, "cua", 3) ? 420 ep->utmp.ut_line : ep->utmp.ut_line + 3) : "-", 421 W_DISPHOSTSIZE, W_DISPHOSTSIZE, *p ? p : "-"); 422 t = ep->utmp.ut_tv.tv_sec; 423 longattime = pr_attime(&t, &now); 424 longidle = pr_idle(ep->idle); 425 (void)printf("%.*s\n", argwidth - longidle - longattime, 426 ep->args); 427 } 428 (void)kvm_close(kd); 429 exit(0); 430 } 431 432 static void 433 pr_header(time_t *nowp, int nusers) 434 { 435 double avenrun[3]; 436 time_t uptime; 437 struct timespec tp; 438 int days, hrs, i, mins, secs; 439 char buf[256]; 440 441 /* 442 * Print time of day. 443 */ 444 if (strftime(buf, sizeof(buf), 445 use_ampm ? "%l:%M%p" : "%k:%M", localtime(nowp)) != 0) 446 (void)printf("%s ", buf); 447 /* 448 * Print how long system has been up. 449 */ 450 if (clock_gettime(CLOCK_UPTIME, &tp) != -1) { 451 uptime = tp.tv_sec; 452 if (uptime > 60) 453 uptime += 30; 454 days = uptime / 86400; 455 uptime %= 86400; 456 hrs = uptime / 3600; 457 uptime %= 3600; 458 mins = uptime / 60; 459 secs = uptime % 60; 460 (void)printf(" up"); 461 if (days > 0) 462 (void)printf(" %d day%s,", days, days > 1 ? "s" : ""); 463 if (hrs > 0 && mins > 0) 464 (void)printf(" %2d:%02d,", hrs, mins); 465 else if (hrs > 0) 466 (void)printf(" %d hr%s,", hrs, hrs > 1 ? "s" : ""); 467 else if (mins > 0) 468 (void)printf(" %d min%s,", mins, mins > 1 ? "s" : ""); 469 else 470 (void)printf(" %d sec%s,", secs, secs > 1 ? "s" : ""); 471 } 472 473 /* Print number of users logged in to system */ 474 (void)printf(" %d user%s", nusers, nusers == 1 ? "" : "s"); 475 476 /* 477 * Print 1, 5, and 15 minute load averages. 478 */ 479 if (getloadavg(avenrun, sizeof(avenrun) / sizeof(avenrun[0])) == -1) 480 (void)printf(", no load average information available\n"); 481 else { 482 (void)printf(", load averages:"); 483 for (i = 0; i < (int)(sizeof(avenrun) / sizeof(avenrun[0])); i++) { 484 if (use_comma && i > 0) 485 (void)printf(","); 486 (void)printf(" %.2f", avenrun[i]); 487 } 488 (void)printf("\n"); 489 } 490 } 491 492 static struct stat * 493 ttystat(char *line) 494 { 495 static struct stat sb; 496 char ttybuf[MAXPATHLEN]; 497 498 (void)snprintf(ttybuf, sizeof(ttybuf), "%s%s", _PATH_DEV, line); 499 if (stat(ttybuf, &sb) == 0 && S_ISCHR(sb.st_mode)) { 500 return (&sb); 501 } else 502 return (NULL); 503 } 504 505 static void 506 usage(int wcmd) 507 { 508 if (wcmd) 509 (void)fprintf(stderr, 510 "usage: w [-dhin] [-M core] [-N system] [user ...]\n"); 511 else 512 (void)fprintf(stderr, "usage: uptime\n"); 513 exit(1); 514 } 515 516 static int 517 this_is_uptime(const char *s) 518 { 519 const char *u; 520 521 if ((u = strrchr(s, '/')) != NULL) 522 ++u; 523 else 524 u = s; 525 if (strcmp(u, "uptime") == 0) 526 return (0); 527 return (-1); 528 } 529