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/sbuf.h> 58 #include <sys/socket.h> 59 #include <sys/tty.h> 60 #include <sys/types.h> 61 62 #include <machine/cpu.h> 63 #include <netinet/in.h> 64 #include <arpa/inet.h> 65 #include <arpa/nameser.h> 66 67 #include <ctype.h> 68 #include <err.h> 69 #include <errno.h> 70 #include <fcntl.h> 71 #include <kvm.h> 72 #include <langinfo.h> 73 #include <libgen.h> 74 #include <libutil.h> 75 #include <limits.h> 76 #include <locale.h> 77 #include <netdb.h> 78 #include <nlist.h> 79 #include <paths.h> 80 #include <resolv.h> 81 #include <stdio.h> 82 #include <stdlib.h> 83 #include <string.h> 84 #include <timeconv.h> 85 #include <unistd.h> 86 #include <utmpx.h> 87 #include <vis.h> 88 #include <libxo/xo.h> 89 90 #include "extern.h" 91 92 static struct utmpx *utmp; 93 static struct winsize ws; 94 static kvm_t *kd; 95 static time_t now; /* the current time of day */ 96 static int ttywidth; /* width of tty */ 97 static int argwidth; /* width of tty */ 98 static int header = 1; /* true if -h flag: don't print heading */ 99 static int nflag; /* true if -n flag: don't convert addrs */ 100 static int dflag; /* true if -d flag: output debug info */ 101 static int sortidle; /* sort by idle time */ 102 int use_ampm; /* use AM/PM time */ 103 static int use_comma; /* use comma as floats separator */ 104 static char **sel_users; /* login array of particular users selected */ 105 106 /* 107 * One of these per active utmp entry. 108 */ 109 static struct entry { 110 struct entry *next; 111 struct utmpx utmp; 112 dev_t tdev; /* dev_t of terminal */ 113 time_t idle; /* idle time of terminal in seconds */ 114 struct kinfo_proc *kp; /* `most interesting' proc */ 115 char *args; /* arg list of interesting process */ 116 struct kinfo_proc *dkp; /* debug option proc list */ 117 } *ep, *ehead = NULL, **nextp = &ehead; 118 119 #define debugproc(p) *(&((struct kinfo_proc *)p)->ki_udata) 120 121 #define W_DISPUSERSIZE 10 122 #define W_DISPLINESIZE 8 123 #define W_DISPHOSTSIZE 24 124 125 static void pr_header(time_t *, int); 126 static struct stat *ttystat(char *); 127 static void usage(int); 128 129 char *fmt_argv(char **, char *, char *, size_t); /* ../../bin/ps/fmt.c */ 130 131 int 132 main(int argc, char *argv[]) 133 { 134 struct kinfo_proc *kp; 135 struct kinfo_proc *dkp; 136 struct stat *stp; 137 time_t touched; 138 int ch, i, nentries, nusers, wcmd, longidle, longattime, dropgid; 139 const char *memf, *nlistf, *p, *save_p; 140 char *x_suffix; 141 char buf[MAXHOSTNAMELEN], errbuf[_POSIX2_LINE_MAX]; 142 char fn[MAXHOSTNAMELEN]; 143 char *dot; 144 145 (void)setlocale(LC_ALL, ""); 146 use_ampm = (*nl_langinfo(T_FMT_AMPM) != '\0'); 147 use_comma = (*nl_langinfo(RADIXCHAR) != ','); 148 149 argc = xo_parse_args(argc, argv); 150 if (argc < 0) 151 exit(1); 152 153 /* Are we w(1) or uptime(1)? */ 154 if (strcmp(basename(argv[0]), "uptime") == 0) { 155 wcmd = 0; 156 p = ""; 157 } else { 158 wcmd = 1; 159 p = "dhiflM:N:nsuw"; 160 } 161 162 dropgid = 0; 163 memf = _PATH_DEVNULL; 164 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 if ((kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf)) == NULL) 211 errx(1, "%s", errbuf); 212 213 (void)time(&now); 214 215 if (*argv) 216 sel_users = argv; 217 218 setutxent(); 219 for (nusers = 0; (utmp = getutxent()) != NULL;) { 220 if (utmp->ut_type != USER_PROCESS) 221 continue; 222 if (!(stp = ttystat(utmp->ut_line))) 223 continue; /* corrupted record */ 224 ++nusers; 225 if (wcmd == 0) 226 continue; 227 if (sel_users) { 228 int usermatch; 229 char **user; 230 231 usermatch = 0; 232 for (user = sel_users; !usermatch && *user; user++) 233 if (!strcmp(utmp->ut_user, *user)) 234 usermatch = 1; 235 if (!usermatch) 236 continue; 237 } 238 if ((ep = calloc(1, sizeof(struct entry))) == NULL) 239 errx(1, "calloc"); 240 *nextp = ep; 241 nextp = &ep->next; 242 memmove(&ep->utmp, utmp, sizeof *utmp); 243 ep->tdev = stp->st_rdev; 244 /* 245 * If this is the console device, attempt to ascertain 246 * the true console device dev_t. 247 */ 248 if (ep->tdev == 0) { 249 size_t size; 250 251 size = sizeof(dev_t); 252 (void)sysctlbyname("machdep.consdev", &ep->tdev, &size, NULL, 0); 253 } 254 touched = stp->st_atime; 255 if (touched < ep->utmp.ut_tv.tv_sec) { 256 /* tty untouched since before login */ 257 touched = ep->utmp.ut_tv.tv_sec; 258 } 259 if ((ep->idle = now - touched) < 0) 260 ep->idle = 0; 261 } 262 endutxent(); 263 264 xo_open_container("uptime-information"); 265 266 if (header || wcmd == 0) { 267 pr_header(&now, nusers); 268 if (wcmd == 0) { 269 xo_close_container("uptime-information"); 270 xo_finish(); 271 272 (void)kvm_close(kd); 273 exit(0); 274 } 275 276 #define HEADER_USER "USER" 277 #define HEADER_TTY "TTY" 278 #define HEADER_FROM "FROM" 279 #define HEADER_LOGIN_IDLE "LOGIN@ IDLE " 280 #define HEADER_WHAT "WHAT\n" 281 #define WUSED (W_DISPUSERSIZE + W_DISPLINESIZE + W_DISPHOSTSIZE + \ 282 sizeof(HEADER_LOGIN_IDLE) + 3) /* header width incl. spaces */ 283 xo_emit("{T:/%-*.*s} {T:/%-*.*s} {T:/%-*.*s} {T:/%s}", 284 W_DISPUSERSIZE, W_DISPUSERSIZE, HEADER_USER, 285 W_DISPLINESIZE, W_DISPLINESIZE, HEADER_TTY, 286 W_DISPHOSTSIZE, W_DISPHOSTSIZE, HEADER_FROM, 287 HEADER_LOGIN_IDLE HEADER_WHAT); 288 } 289 290 if ((kp = kvm_getprocs(kd, KERN_PROC_ALL, 0, &nentries)) == NULL) 291 err(1, "%s", kvm_geterr(kd)); 292 for (i = 0; i < nentries; i++, kp++) { 293 if (kp->ki_stat == SIDL || kp->ki_stat == SZOMB || 294 kp->ki_tdev == NODEV) 295 continue; 296 for (ep = ehead; ep != NULL; ep = ep->next) { 297 if (ep->tdev == kp->ki_tdev) { 298 /* 299 * proc is associated with this terminal 300 */ 301 if (ep->kp == NULL && kp->ki_pgid == kp->ki_tpgid) { 302 /* 303 * Proc is 'most interesting' 304 */ 305 if (proc_compare(ep->kp, kp)) 306 ep->kp = kp; 307 } 308 /* 309 * Proc debug option info; add to debug 310 * list using kinfo_proc ki_spare[0] 311 * as next pointer; ptr to ptr avoids the 312 * ptr = long assumption. 313 */ 314 dkp = ep->dkp; 315 ep->dkp = kp; 316 debugproc(kp) = dkp; 317 } 318 } 319 } 320 if ((ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) == -1 && 321 ioctl(STDERR_FILENO, TIOCGWINSZ, &ws) == -1 && 322 ioctl(STDIN_FILENO, TIOCGWINSZ, &ws) == -1) || ws.ws_col == 0) 323 ttywidth = 79; 324 else 325 ttywidth = ws.ws_col - 1; 326 argwidth = ttywidth - WUSED; 327 if (argwidth < 4) 328 argwidth = 8; 329 for (ep = ehead; ep != NULL; ep = ep->next) { 330 if (ep->kp == NULL) { 331 ep->args = strdup("-"); 332 continue; 333 } 334 ep->args = fmt_argv(kvm_getargv(kd, ep->kp, argwidth), 335 ep->kp->ki_comm, NULL, MAXCOMLEN); 336 if (ep->args == NULL) 337 err(1, NULL); 338 } 339 /* sort by idle time */ 340 if (sortidle && ehead != NULL) { 341 struct entry *from, *save; 342 343 from = ehead; 344 ehead = NULL; 345 while (from != NULL) { 346 for (nextp = &ehead; 347 (*nextp) && from->idle >= (*nextp)->idle; 348 nextp = &(*nextp)->next) 349 continue; 350 save = from; 351 from = from->next; 352 save->next = *nextp; 353 *nextp = save; 354 } 355 } 356 357 xo_open_container("user-table"); 358 xo_open_list("user-entry"); 359 360 for (ep = ehead; ep != NULL; ep = ep->next) { 361 struct addrinfo hints, *res; 362 struct sockaddr_storage ss; 363 struct sockaddr *sa = (struct sockaddr *)&ss; 364 struct sockaddr_in *lsin = (struct sockaddr_in *)&ss; 365 struct sockaddr_in6 *lsin6 = (struct sockaddr_in6 *)&ss; 366 time_t t; 367 int isaddr; 368 369 xo_open_instance("user-entry"); 370 371 save_p = p = *ep->utmp.ut_host ? ep->utmp.ut_host : "-"; 372 if ((x_suffix = strrchr(p, ':')) != NULL) { 373 if ((dot = strchr(x_suffix, '.')) != NULL && 374 strchr(dot+1, '.') == NULL) 375 *x_suffix++ = '\0'; 376 else 377 x_suffix = NULL; 378 } 379 380 isaddr = 0; 381 memset(&ss, '\0', sizeof(ss)); 382 if (inet_pton(AF_INET6, p, &lsin6->sin6_addr) == 1) { 383 lsin6->sin6_len = sizeof(*lsin6); 384 lsin6->sin6_family = AF_INET6; 385 isaddr = 1; 386 } else if (inet_pton(AF_INET, p, &lsin->sin_addr) == 1) { 387 lsin->sin_len = sizeof(*lsin); 388 lsin->sin_family = AF_INET; 389 isaddr = 1; 390 } 391 if (!nflag) { 392 /* Attempt to change an IP address into a name */ 393 if (isaddr && realhostname_sa(fn, sizeof(fn), sa, 394 sa->sa_len) == HOSTNAME_FOUND) 395 p = fn; 396 } else if (!isaddr) { 397 /* 398 * If a host has only one A/AAAA RR, change a 399 * name into an IP address 400 */ 401 memset(&hints, 0, sizeof(hints)); 402 hints.ai_flags = AI_PASSIVE; 403 hints.ai_family = AF_UNSPEC; 404 hints.ai_socktype = SOCK_STREAM; 405 if (getaddrinfo(p, NULL, &hints, &res) == 0) { 406 if (res->ai_next == NULL && 407 getnameinfo(res->ai_addr, res->ai_addrlen, 408 fn, sizeof(fn), NULL, 0, 409 NI_NUMERICHOST) == 0) 410 p = fn; 411 freeaddrinfo(res); 412 } 413 } 414 415 if (x_suffix) { 416 (void)snprintf(buf, sizeof(buf), "%s:%s", p, x_suffix); 417 p = buf; 418 } 419 if (dflag) { 420 xo_open_container("process-table"); 421 xo_open_list("process-entry"); 422 423 for (dkp = ep->dkp; dkp != NULL; dkp = debugproc(dkp)) { 424 const char *ptr; 425 426 ptr = fmt_argv(kvm_getargv(kd, dkp, argwidth), 427 dkp->ki_comm, NULL, MAXCOMLEN); 428 if (ptr == NULL) 429 ptr = "-"; 430 xo_open_instance("process-entry"); 431 xo_emit("\t\t{:process-id/%-9d/%d} {:command/%s}\n", 432 dkp->ki_pid, ptr); 433 xo_close_instance("process-entry"); 434 } 435 xo_close_list("process-entry"); 436 xo_close_container("process-table"); 437 } 438 xo_emit("{:user/%-*.*s/%@**@s} {:tty/%-*.*s/%@**@s} ", 439 W_DISPUSERSIZE, W_DISPUSERSIZE, ep->utmp.ut_user, 440 W_DISPLINESIZE, W_DISPLINESIZE, 441 *ep->utmp.ut_line ? 442 (strncmp(ep->utmp.ut_line, "tty", 3) && 443 strncmp(ep->utmp.ut_line, "cua", 3) ? 444 ep->utmp.ut_line : ep->utmp.ut_line + 3) : "-"); 445 446 if (save_p && save_p != p) 447 xo_attr("address", "%s", save_p); 448 xo_emit("{:from/%-*.*s/%@**@s} ", 449 W_DISPHOSTSIZE, W_DISPHOSTSIZE, *p ? p : "-"); 450 t = ep->utmp.ut_tv.tv_sec; 451 longattime = pr_attime(&t, &now); 452 longidle = pr_idle(ep->idle); 453 xo_emit("{:command/%.*s/%@*@s}\n", 454 argwidth - longidle - longattime, 455 ep->args); 456 457 xo_close_instance("user-entry"); 458 } 459 460 xo_close_list("user-entry"); 461 xo_close_container("user-table"); 462 xo_close_container("uptime-information"); 463 xo_finish(); 464 465 (void)kvm_close(kd); 466 exit(0); 467 } 468 469 static void 470 pr_header(time_t *nowp, int nusers) 471 { 472 double avenrun[3]; 473 time_t uptime; 474 struct timespec tp; 475 int days, hrs, i, mins, secs; 476 char buf[256]; 477 struct sbuf *upbuf; 478 479 upbuf = sbuf_new_auto(); 480 /* 481 * Print time of day. 482 */ 483 if (strftime(buf, sizeof(buf), 484 use_ampm ? "%l:%M%p" : "%k:%M", localtime(nowp)) != 0) 485 xo_emit("{:time-of-day/%s} ", buf); 486 /* 487 * Print how long system has been up. 488 */ 489 if (clock_gettime(CLOCK_UPTIME, &tp) != -1) { 490 uptime = tp.tv_sec; 491 if (uptime > 60) 492 uptime += 30; 493 days = uptime / 86400; 494 uptime %= 86400; 495 hrs = uptime / 3600; 496 uptime %= 3600; 497 mins = uptime / 60; 498 secs = uptime % 60; 499 xo_emit(" up"); 500 xo_emit("{e:uptime/%lu}", (unsigned long) tp.tv_sec); 501 xo_emit("{e:days/%d}{e:hours/%d}{e:minutes/%d}{e:seconds/%d}", days, hrs, mins, secs); 502 503 if (days > 0) 504 sbuf_printf(upbuf, " %d day%s,", 505 days, days > 1 ? "s" : ""); 506 if (hrs > 0 && mins > 0) 507 sbuf_printf(upbuf, " %2d:%02d,", hrs, mins); 508 else if (hrs > 0) 509 sbuf_printf(upbuf, " %d hr%s,", 510 hrs, hrs > 1 ? "s" : ""); 511 else if (mins > 0) 512 sbuf_printf(upbuf, " %d min%s,", 513 mins, mins > 1 ? "s" : ""); 514 else 515 sbuf_printf(upbuf, " %d sec%s,", 516 secs, secs > 1 ? "s" : ""); 517 if (sbuf_finish(upbuf) != 0) 518 xo_err(1, "Could not generate output"); 519 xo_emit("{:uptime-human/%s}", sbuf_data(upbuf)); 520 sbuf_delete(upbuf); 521 } 522 523 /* Print number of users logged in to system */ 524 xo_emit(" {:users/%d} {N:user%s}", nusers, nusers == 1 ? "" : "s"); 525 526 /* 527 * Print 1, 5, and 15 minute load averages. 528 */ 529 if (getloadavg(avenrun, sizeof(avenrun) / sizeof(avenrun[0])) == -1) 530 xo_emit(", no load average information available\n"); 531 else { 532 static const char *format[] = { 533 " {:load-average-1/%.2f}", 534 " {:load-average-5/%.2f}", 535 " {:load-average-15/%.2f}", 536 }; 537 xo_emit(", load averages:"); 538 for (i = 0; i < (int)(sizeof(avenrun) / sizeof(avenrun[0])); i++) { 539 if (use_comma && i > 0) 540 xo_emit(","); 541 xo_emit(format[i], avenrun[i]); 542 } 543 xo_emit("\n"); 544 } 545 } 546 547 static struct stat * 548 ttystat(char *line) 549 { 550 static struct stat sb; 551 char ttybuf[MAXPATHLEN]; 552 553 (void)snprintf(ttybuf, sizeof(ttybuf), "%s%s", _PATH_DEV, line); 554 if (stat(ttybuf, &sb) == 0 && S_ISCHR(sb.st_mode)) { 555 return (&sb); 556 } else 557 return (NULL); 558 } 559 560 static void 561 usage(int wcmd) 562 { 563 if (wcmd) 564 xo_error("usage: w [-dhin] [-M core] [-N system] [user ...]\n"); 565 else 566 xo_error("usage: uptime\n"); 567 xo_finish(); 568 exit(1); 569 } 570