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 <libgen.h> 72 #include <libutil.h> 73 #include <limits.h> 74 #include <locale.h> 75 #include <netdb.h> 76 #include <nlist.h> 77 #include <paths.h> 78 #include <resolv.h> 79 #include <stdio.h> 80 #include <stdlib.h> 81 #include <string.h> 82 #include <timeconv.h> 83 #include <unistd.h> 84 #include <utmpx.h> 85 #include <vis.h> 86 #include <libxo/xo.h> 87 88 #include "extern.h" 89 90 static struct utmpx *utmp; 91 static struct winsize ws; 92 static kvm_t *kd; 93 static time_t now; /* the current time of day */ 94 static int ttywidth; /* width of tty */ 95 static int argwidth; /* width of tty */ 96 static int header = 1; /* true if -h flag: don't print heading */ 97 static int nflag; /* true if -n flag: don't convert addrs */ 98 static int dflag; /* true if -d flag: output debug info */ 99 static int sortidle; /* sort by idle time */ 100 int use_ampm; /* use AM/PM time */ 101 static int use_comma; /* use comma as floats separator */ 102 static char **sel_users; /* login array of particular users selected */ 103 104 /* 105 * One of these per active utmp entry. 106 */ 107 static struct entry { 108 struct entry *next; 109 struct utmpx utmp; 110 dev_t tdev; /* dev_t of terminal */ 111 time_t idle; /* idle time of terminal in seconds */ 112 struct kinfo_proc *kp; /* `most interesting' proc */ 113 char *args; /* arg list of interesting process */ 114 struct kinfo_proc *dkp; /* debug option proc list */ 115 } *ep, *ehead = NULL, **nextp = &ehead; 116 117 #define debugproc(p) *(&((struct kinfo_proc *)p)->ki_udata) 118 119 #define W_DISPUSERSIZE 10 120 #define W_DISPLINESIZE 8 121 #define W_DISPHOSTSIZE 24 122 123 static void pr_header(time_t *, int); 124 static struct stat *ttystat(char *); 125 static void usage(int); 126 127 char *fmt_argv(char **, char *, char *, size_t); /* ../../bin/ps/fmt.c */ 128 129 int 130 main(int argc, char *argv[]) 131 { 132 struct kinfo_proc *kp; 133 struct kinfo_proc *dkp; 134 struct stat *stp; 135 time_t touched; 136 int ch, i, nentries, nusers, wcmd, longidle, longattime, dropgid; 137 const char *memf, *nlistf, *p, *save_p; 138 char *x_suffix; 139 char buf[MAXHOSTNAMELEN], errbuf[_POSIX2_LINE_MAX]; 140 char fn[MAXHOSTNAMELEN]; 141 char *dot; 142 143 (void)setlocale(LC_ALL, ""); 144 use_ampm = (*nl_langinfo(T_FMT_AMPM) != '\0'); 145 use_comma = (*nl_langinfo(RADIXCHAR) != ','); 146 147 argc = xo_parse_args(argc, argv); 148 if (argc < 0) 149 exit(1); 150 151 /* Are we w(1) or uptime(1)? */ 152 if (strcmp(basename(argv[0]), "uptime") == 0) { 153 wcmd = 0; 154 p = ""; 155 } else { 156 wcmd = 1; 157 p = "dhiflM:N:nsuw"; 158 } 159 160 dropgid = 0; 161 memf = _PATH_DEVNULL; 162 nlistf = NULL; 163 while ((ch = getopt(argc, argv, p)) != -1) 164 switch (ch) { 165 case 'd': 166 dflag = 1; 167 break; 168 case 'h': 169 header = 0; 170 break; 171 case 'i': 172 sortidle = 1; 173 break; 174 case 'M': 175 header = 0; 176 memf = optarg; 177 dropgid = 1; 178 break; 179 case 'N': 180 nlistf = optarg; 181 dropgid = 1; 182 break; 183 case 'n': 184 nflag = 1; 185 break; 186 case 'f': case 'l': case 's': case 'u': case 'w': 187 warnx("[-flsuw] no longer supported"); 188 /* FALLTHROUGH */ 189 case '?': 190 default: 191 usage(wcmd); 192 } 193 argc -= optind; 194 argv += optind; 195 196 if (!(_res.options & RES_INIT)) 197 res_init(); 198 _res.retrans = 2; /* resolver timeout to 2 seconds per try */ 199 _res.retry = 1; /* only try once.. */ 200 201 /* 202 * Discard setgid privileges if not the running kernel so that bad 203 * guys can't print interesting stuff from kernel memory. 204 */ 205 if (dropgid) 206 setgid(getgid()); 207 208 if ((kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf)) == NULL) 209 errx(1, "%s", errbuf); 210 211 (void)time(&now); 212 213 if (*argv) 214 sel_users = argv; 215 216 setutxent(); 217 for (nusers = 0; (utmp = getutxent()) != NULL;) { 218 if (utmp->ut_type != USER_PROCESS) 219 continue; 220 if (!(stp = ttystat(utmp->ut_line))) 221 continue; /* corrupted record */ 222 ++nusers; 223 if (wcmd == 0) 224 continue; 225 if (sel_users) { 226 int usermatch; 227 char **user; 228 229 usermatch = 0; 230 for (user = sel_users; !usermatch && *user; user++) 231 if (!strcmp(utmp->ut_user, *user)) 232 usermatch = 1; 233 if (!usermatch) 234 continue; 235 } 236 if ((ep = calloc(1, sizeof(struct entry))) == NULL) 237 errx(1, "calloc"); 238 *nextp = ep; 239 nextp = &ep->next; 240 memmove(&ep->utmp, utmp, sizeof *utmp); 241 ep->tdev = stp->st_rdev; 242 /* 243 * If this is the console device, attempt to ascertain 244 * the true console device dev_t. 245 */ 246 if (ep->tdev == 0) { 247 size_t size; 248 249 size = sizeof(dev_t); 250 (void)sysctlbyname("machdep.consdev", &ep->tdev, &size, NULL, 0); 251 } 252 touched = stp->st_atime; 253 if (touched < ep->utmp.ut_tv.tv_sec) { 254 /* tty untouched since before login */ 255 touched = ep->utmp.ut_tv.tv_sec; 256 } 257 if ((ep->idle = now - touched) < 0) 258 ep->idle = 0; 259 } 260 endutxent(); 261 262 xo_open_container("uptime-information"); 263 264 if (header || wcmd == 0) { 265 pr_header(&now, nusers); 266 if (wcmd == 0) { 267 xo_close_container("uptime-information"); 268 (void)kvm_close(kd); 269 exit(0); 270 } 271 272 #define HEADER_USER "USER" 273 #define HEADER_TTY "TTY" 274 #define HEADER_FROM "FROM" 275 #define HEADER_LOGIN_IDLE "LOGIN@ IDLE " 276 #define HEADER_WHAT "WHAT\n" 277 #define WUSED (W_DISPUSERSIZE + W_DISPLINESIZE + W_DISPHOSTSIZE + \ 278 sizeof(HEADER_LOGIN_IDLE) + 3) /* header width incl. spaces */ 279 xo_emit("{T:/%-*.*s} {T:/%-*.*s} {T:/%-*.*s} {T:/%s}", 280 W_DISPUSERSIZE, W_DISPUSERSIZE, HEADER_USER, 281 W_DISPLINESIZE, W_DISPLINESIZE, HEADER_TTY, 282 W_DISPHOSTSIZE, W_DISPHOSTSIZE, HEADER_FROM, 283 HEADER_LOGIN_IDLE HEADER_WHAT); 284 } 285 286 if ((kp = kvm_getprocs(kd, KERN_PROC_ALL, 0, &nentries)) == NULL) 287 err(1, "%s", kvm_geterr(kd)); 288 for (i = 0; i < nentries; i++, kp++) { 289 if (kp->ki_stat == SIDL || kp->ki_stat == SZOMB || 290 kp->ki_tdev == NODEV) 291 continue; 292 for (ep = ehead; ep != NULL; ep = ep->next) { 293 if (ep->tdev == kp->ki_tdev) { 294 /* 295 * proc is associated with this terminal 296 */ 297 if (ep->kp == NULL && kp->ki_pgid == kp->ki_tpgid) { 298 /* 299 * Proc is 'most interesting' 300 */ 301 if (proc_compare(ep->kp, kp)) 302 ep->kp = kp; 303 } 304 /* 305 * Proc debug option info; add to debug 306 * list using kinfo_proc ki_spare[0] 307 * as next pointer; ptr to ptr avoids the 308 * ptr = long assumption. 309 */ 310 dkp = ep->dkp; 311 ep->dkp = kp; 312 debugproc(kp) = dkp; 313 } 314 } 315 } 316 if ((ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) == -1 && 317 ioctl(STDERR_FILENO, TIOCGWINSZ, &ws) == -1 && 318 ioctl(STDIN_FILENO, TIOCGWINSZ, &ws) == -1) || ws.ws_col == 0) 319 ttywidth = 79; 320 else 321 ttywidth = ws.ws_col - 1; 322 argwidth = ttywidth - WUSED; 323 if (argwidth < 4) 324 argwidth = 8; 325 for (ep = ehead; ep != NULL; ep = ep->next) { 326 if (ep->kp == NULL) { 327 ep->args = strdup("-"); 328 continue; 329 } 330 ep->args = fmt_argv(kvm_getargv(kd, ep->kp, argwidth), 331 ep->kp->ki_comm, NULL, MAXCOMLEN); 332 if (ep->args == NULL) 333 err(1, NULL); 334 } 335 /* sort by idle time */ 336 if (sortidle && ehead != NULL) { 337 struct entry *from, *save; 338 339 from = ehead; 340 ehead = NULL; 341 while (from != NULL) { 342 for (nextp = &ehead; 343 (*nextp) && from->idle >= (*nextp)->idle; 344 nextp = &(*nextp)->next) 345 continue; 346 save = from; 347 from = from->next; 348 save->next = *nextp; 349 *nextp = save; 350 } 351 } 352 353 xo_open_container("user-table"); 354 xo_open_list("user-entry"); 355 356 for (ep = ehead; ep != NULL; ep = ep->next) { 357 struct addrinfo hints, *res; 358 struct sockaddr_storage ss; 359 struct sockaddr *sa = (struct sockaddr *)&ss; 360 struct sockaddr_in *lsin = (struct sockaddr_in *)&ss; 361 struct sockaddr_in6 *lsin6 = (struct sockaddr_in6 *)&ss; 362 time_t t; 363 int isaddr; 364 365 xo_open_instance("user-entry"); 366 367 save_p = p = *ep->utmp.ut_host ? ep->utmp.ut_host : "-"; 368 if ((x_suffix = strrchr(p, ':')) != NULL) { 369 if ((dot = strchr(x_suffix, '.')) != NULL && 370 strchr(dot+1, '.') == NULL) 371 *x_suffix++ = '\0'; 372 else 373 x_suffix = NULL; 374 } 375 376 isaddr = 0; 377 memset(&ss, '\0', sizeof(ss)); 378 if (inet_pton(AF_INET6, p, &lsin6->sin6_addr) == 1) { 379 lsin6->sin6_len = sizeof(*lsin6); 380 lsin6->sin6_family = AF_INET6; 381 isaddr = 1; 382 } else if (inet_pton(AF_INET, p, &lsin->sin_addr) == 1) { 383 lsin->sin_len = sizeof(*lsin); 384 lsin->sin_family = AF_INET; 385 isaddr = 1; 386 } 387 if (!nflag) { 388 /* Attempt to change an IP address into a name */ 389 if (isaddr && realhostname_sa(fn, sizeof(fn), sa, 390 sa->sa_len) == HOSTNAME_FOUND) 391 p = fn; 392 } else if (!isaddr) { 393 /* 394 * If a host has only one A/AAAA RR, change a 395 * name into an IP address 396 */ 397 memset(&hints, 0, sizeof(hints)); 398 hints.ai_flags = AI_PASSIVE; 399 hints.ai_family = AF_UNSPEC; 400 hints.ai_socktype = SOCK_STREAM; 401 if (getaddrinfo(p, NULL, &hints, &res) == 0) { 402 if (res->ai_next == NULL && 403 getnameinfo(res->ai_addr, res->ai_addrlen, 404 fn, sizeof(fn), NULL, 0, 405 NI_NUMERICHOST) == 0) 406 p = fn; 407 freeaddrinfo(res); 408 } 409 } 410 411 if (x_suffix) { 412 (void)snprintf(buf, sizeof(buf), "%s:%s", p, x_suffix); 413 p = buf; 414 } 415 if (dflag) { 416 xo_open_container("process-table"); 417 xo_open_list("process-entry"); 418 419 for (dkp = ep->dkp; dkp != NULL; dkp = debugproc(dkp)) { 420 const char *ptr; 421 422 ptr = fmt_argv(kvm_getargv(kd, dkp, argwidth), 423 dkp->ki_comm, NULL, MAXCOMLEN); 424 if (ptr == NULL) 425 ptr = "-"; 426 xo_open_instance("process-entry"); 427 xo_emit("\t\t{:process-id/%-9d/%d} {:command/%s}\n", 428 dkp->ki_pid, ptr); 429 xo_close_instance("process-entry"); 430 } 431 xo_close_list("process-entry"); 432 xo_close_container("process-table"); 433 } 434 xo_emit("{:user/%-*.*s/%@**@s} {:tty/%-*.*s/%@**@s} ", 435 W_DISPUSERSIZE, W_DISPUSERSIZE, ep->utmp.ut_user, 436 W_DISPLINESIZE, W_DISPLINESIZE, 437 *ep->utmp.ut_line ? 438 (strncmp(ep->utmp.ut_line, "tty", 3) && 439 strncmp(ep->utmp.ut_line, "cua", 3) ? 440 ep->utmp.ut_line : ep->utmp.ut_line + 3) : "-"); 441 442 if (save_p && save_p != p) 443 xo_attr("address", "%s", save_p); 444 xo_emit("{:from/%-*.*s/%@**@s} ", 445 W_DISPHOSTSIZE, W_DISPHOSTSIZE, *p ? p : "-"); 446 t = ep->utmp.ut_tv.tv_sec; 447 longattime = pr_attime(&t, &now); 448 longidle = pr_idle(ep->idle); 449 xo_emit("{:command/%.*s/%@*@s}\n", 450 argwidth - longidle - longattime, 451 ep->args); 452 453 xo_close_instance("user-entry"); 454 } 455 456 xo_close_list("user-entry"); 457 xo_close_container("user-table"); 458 xo_close_container("uptime-information"); 459 xo_finish(); 460 461 (void)kvm_close(kd); 462 exit(0); 463 } 464 465 static void 466 pr_header(time_t *nowp, int nusers) 467 { 468 double avenrun[3]; 469 time_t uptime; 470 struct timespec tp; 471 int days, hrs, i, mins, secs; 472 char buf[256]; 473 474 /* 475 * Print time of day. 476 */ 477 if (strftime(buf, sizeof(buf), 478 use_ampm ? "%l:%M%p" : "%k:%M", localtime(nowp)) != 0) 479 xo_emit("{:time-of-day/%s} ", buf); 480 /* 481 * Print how long system has been up. 482 */ 483 if (clock_gettime(CLOCK_UPTIME, &tp) != -1) { 484 uptime = tp.tv_sec; 485 if (uptime > 60) 486 uptime += 30; 487 days = uptime / 86400; 488 uptime %= 86400; 489 hrs = uptime / 3600; 490 uptime %= 3600; 491 mins = uptime / 60; 492 secs = uptime % 60; 493 xo_emit(" up"); 494 xo_attr("seconds", "%lu", (unsigned long) tp.tv_sec); 495 if (days > 0) 496 xo_emit(" {:uptime/%d day%s},", 497 days, days > 1 ? "s" : ""); 498 if (hrs > 0 && mins > 0) 499 xo_emit(" {:uptime/%2d:%02d},", hrs, mins); 500 else if (hrs > 0) 501 xo_emit(" {:uptime/%d hr%s},", 502 hrs, hrs > 1 ? "s" : ""); 503 else if (mins > 0) 504 xo_emit(" {:uptime/%d min%s},", 505 mins, mins > 1 ? "s" : ""); 506 else 507 xo_emit(" {:uptime/%d sec%s},", 508 secs, secs > 1 ? "s" : ""); 509 } 510 511 /* Print number of users logged in to system */ 512 xo_emit(" {:users/%d} {N:user%s}", nusers, nusers == 1 ? "" : "s"); 513 514 /* 515 * Print 1, 5, and 15 minute load averages. 516 */ 517 if (getloadavg(avenrun, sizeof(avenrun) / sizeof(avenrun[0])) == -1) 518 xo_emit(", no load average information available\n"); 519 else { 520 static const char *format[] = { 521 " {:load-average-1/%.2f}", 522 " {:load-average-5/%.2f}", 523 " {:load-average-15/%.2f}", 524 }; 525 xo_emit(", load averages:"); 526 for (i = 0; i < (int)(sizeof(avenrun) / sizeof(avenrun[0])); i++) { 527 if (use_comma && i > 0) 528 xo_emit(","); 529 xo_emit(format[i], avenrun[i]); 530 } 531 xo_emit("\n"); 532 } 533 } 534 535 static struct stat * 536 ttystat(char *line) 537 { 538 static struct stat sb; 539 char ttybuf[MAXPATHLEN]; 540 541 (void)snprintf(ttybuf, sizeof(ttybuf), "%s%s", _PATH_DEV, line); 542 if (stat(ttybuf, &sb) == 0 && S_ISCHR(sb.st_mode)) { 543 return (&sb); 544 } else 545 return (NULL); 546 } 547 548 static void 549 usage(int wcmd) 550 { 551 if (wcmd) 552 xo_error("usage: w [-dhin] [-M core] [-N system] [user ...]\n"); 553 else 554 xo_error("usage: uptime\n"); 555 exit(1); 556 } 557