1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1980, 1991, 1993, 1994 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 34 __FBSDID("$FreeBSD$"); 35 36 #ifndef lint 37 static const char copyright[] = 38 "@(#) Copyright (c) 1980, 1991, 1993, 1994\n\ 39 The Regents of the University of California. All rights reserved.\n"; 40 #endif 41 42 #ifndef lint 43 static const char sccsid[] = "@(#)w.c 8.4 (Berkeley) 4/16/94"; 44 #endif 45 46 /* 47 * w - print system status (who and what) 48 * 49 * This program is similar to the systat command on Tenex/Tops 10/20 50 * 51 */ 52 #include <sys/param.h> 53 #include <sys/time.h> 54 #include <sys/stat.h> 55 #include <sys/sysctl.h> 56 #include <sys/proc.h> 57 #include <sys/user.h> 58 #include <sys/ioctl.h> 59 #include <sys/sbuf.h> 60 #include <sys/socket.h> 61 #include <sys/tty.h> 62 #include <sys/types.h> 63 64 #include <machine/cpu.h> 65 #include <netinet/in.h> 66 #include <arpa/inet.h> 67 #include <arpa/nameser.h> 68 69 #include <ctype.h> 70 #include <errno.h> 71 #include <fcntl.h> 72 #include <kvm.h> 73 #include <langinfo.h> 74 #include <libgen.h> 75 #include <libutil.h> 76 #include <limits.h> 77 #include <locale.h> 78 #include <netdb.h> 79 #include <nlist.h> 80 #include <paths.h> 81 #include <resolv.h> 82 #include <stdio.h> 83 #include <stdlib.h> 84 #include <string.h> 85 #include <timeconv.h> 86 #include <unistd.h> 87 #include <utmpx.h> 88 #include <vis.h> 89 #include <libxo/xo.h> 90 91 #include "extern.h" 92 93 static struct utmpx *utmp; 94 static struct winsize ws; 95 static kvm_t *kd; 96 static time_t now; /* the current time of day */ 97 static size_t ttywidth; /* width of tty */ 98 static size_t fromwidth = 0; /* max width of "from" field */ 99 static size_t argwidth; /* width of arguments */ 100 static int header = 1; /* true if -h flag: don't print heading */ 101 static int nflag; /* true if -n flag: don't convert addrs */ 102 static int dflag; /* true if -d flag: output debug info */ 103 static int sortidle; /* sort by idle time */ 104 int use_ampm; /* use AM/PM time */ 105 static int use_comma; /* use comma as floats separator */ 106 static char **sel_users; /* login array of particular users selected */ 107 108 /* 109 * One of these per active utmp entry. 110 */ 111 static struct entry { 112 struct entry *next; 113 struct utmpx utmp; 114 dev_t tdev; /* dev_t of terminal */ 115 time_t idle; /* idle time of terminal in seconds */ 116 struct kinfo_proc *kp; /* `most interesting' proc */ 117 char *args; /* arg list of interesting process */ 118 struct kinfo_proc *dkp; /* debug option proc list */ 119 char *from; /* "from": name or addr */ 120 char *save_from; /* original "from": name or addr */ 121 } *ep, *ehead = NULL, **nextp = &ehead; 122 123 #define debugproc(p) *(&((struct kinfo_proc *)p)->ki_udata) 124 125 #define W_DISPUSERSIZE 10 126 #define W_DISPLINESIZE 8 127 #define W_MAXHOSTSIZE 40 128 129 static void pr_header(time_t *, int); 130 static struct stat *ttystat(char *); 131 static void usage(int); 132 133 char *fmt_argv(char **, char *, char *, size_t); /* ../../bin/ps/fmt.c */ 134 135 int 136 main(int argc, char *argv[]) 137 { 138 struct kinfo_proc *kp; 139 struct kinfo_proc *dkp; 140 struct stat *stp; 141 time_t touched; 142 size_t width; 143 int ch, i, nentries, nusers, wcmd, longidle, longattime; 144 const char *memf, *nlistf, *p, *save_p; 145 char *x_suffix; 146 char errbuf[_POSIX2_LINE_MAX]; 147 char buf[MAXHOSTNAMELEN], fn[MAXHOSTNAMELEN]; 148 char *dot; 149 150 (void)setlocale(LC_ALL, ""); 151 use_ampm = (*nl_langinfo(T_FMT_AMPM) != '\0'); 152 use_comma = (*nl_langinfo(RADIXCHAR) != ','); 153 154 argc = xo_parse_args(argc, argv); 155 if (argc < 0) 156 exit(1); 157 158 /* Are we w(1) or uptime(1)? */ 159 if (strcmp(basename(argv[0]), "uptime") == 0) { 160 wcmd = 0; 161 p = ""; 162 } else { 163 wcmd = 1; 164 p = "dhiflM:N:nsuw"; 165 } 166 167 memf = _PATH_DEVNULL; 168 nlistf = NULL; 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 break; 184 case 'N': 185 nlistf = optarg; 186 break; 187 case 'n': 188 nflag += 1; 189 break; 190 case 'f': case 'l': case 's': case 'u': case 'w': 191 xo_warnx("-%c no longer supported", ch); 192 /* FALLTHROUGH */ 193 case '?': 194 default: 195 usage(wcmd); 196 } 197 argc -= optind; 198 argv += optind; 199 200 if (!(_res.options & RES_INIT)) 201 res_init(); 202 _res.retrans = 2; /* resolver timeout to 2 seconds per try */ 203 _res.retry = 1; /* only try once.. */ 204 205 if ((kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf)) == NULL) 206 xo_errx(1, "%s", errbuf); 207 208 (void)time(&now); 209 210 if (*argv) 211 sel_users = argv; 212 213 setutxent(); 214 for (nusers = 0; (utmp = getutxent()) != NULL;) { 215 struct addrinfo hints, *res; 216 struct sockaddr_storage ss; 217 struct sockaddr *sa = (struct sockaddr *)&ss; 218 struct sockaddr_in *lsin = (struct sockaddr_in *)&ss; 219 struct sockaddr_in6 *lsin6 = (struct sockaddr_in6 *)&ss; 220 int isaddr; 221 222 if (utmp->ut_type != USER_PROCESS) 223 continue; 224 if (!(stp = ttystat(utmp->ut_line))) 225 continue; /* corrupted record */ 226 ++nusers; 227 if (wcmd == 0) 228 continue; 229 if (sel_users) { 230 int usermatch; 231 char **user; 232 233 usermatch = 0; 234 for (user = sel_users; !usermatch && *user; user++) 235 if (!strcmp(utmp->ut_user, *user)) 236 usermatch = 1; 237 if (!usermatch) 238 continue; 239 } 240 if ((ep = calloc(1, sizeof(struct entry))) == NULL) 241 xo_errx(1, "calloc"); 242 *nextp = ep; 243 nextp = &ep->next; 244 memmove(&ep->utmp, utmp, sizeof *utmp); 245 ep->tdev = stp->st_rdev; 246 /* 247 * If this is the console device, attempt to ascertain 248 * the true console device dev_t. 249 */ 250 if (ep->tdev == 0) { 251 size_t size; 252 253 size = sizeof(dev_t); 254 (void)sysctlbyname("machdep.consdev", &ep->tdev, &size, NULL, 0); 255 } 256 touched = stp->st_atime; 257 if (touched < ep->utmp.ut_tv.tv_sec) { 258 /* tty untouched since before login */ 259 touched = ep->utmp.ut_tv.tv_sec; 260 } 261 if ((ep->idle = now - touched) < 0) 262 ep->idle = 0; 263 264 save_p = p = *ep->utmp.ut_host ? ep->utmp.ut_host : "-"; 265 if ((x_suffix = strrchr(p, ':')) != NULL) { 266 if ((dot = strchr(x_suffix, '.')) != NULL && 267 strchr(dot+1, '.') == NULL) 268 *x_suffix++ = '\0'; 269 else 270 x_suffix = NULL; 271 } 272 273 isaddr = 0; 274 memset(&ss, '\0', sizeof(ss)); 275 if (inet_pton(AF_INET6, p, &lsin6->sin6_addr) == 1) { 276 lsin6->sin6_len = sizeof(*lsin6); 277 lsin6->sin6_family = AF_INET6; 278 isaddr = 1; 279 } else if (inet_pton(AF_INET, p, &lsin->sin_addr) == 1) { 280 lsin->sin_len = sizeof(*lsin); 281 lsin->sin_family = AF_INET; 282 isaddr = 1; 283 } 284 if (nflag == 0) { 285 /* Attempt to change an IP address into a name */ 286 if (isaddr && realhostname_sa(fn, sizeof(fn), sa, 287 sa->sa_len) == HOSTNAME_FOUND) 288 p = fn; 289 } else if (!isaddr && nflag > 1) { 290 /* 291 * If a host has only one A/AAAA RR, change a 292 * name into an IP address 293 */ 294 memset(&hints, 0, sizeof(hints)); 295 hints.ai_flags = AI_PASSIVE; 296 hints.ai_family = AF_UNSPEC; 297 hints.ai_socktype = SOCK_STREAM; 298 if (getaddrinfo(p, NULL, &hints, &res) == 0) { 299 if (res->ai_next == NULL && 300 getnameinfo(res->ai_addr, res->ai_addrlen, 301 fn, sizeof(fn), NULL, 0, 302 NI_NUMERICHOST) == 0) 303 p = fn; 304 freeaddrinfo(res); 305 } 306 } 307 308 if (x_suffix) { 309 (void)snprintf(buf, sizeof(buf), "%s:%s", p, x_suffix); 310 p = buf; 311 } 312 ep->from = strdup(p); 313 if ((width = strlen(p)) > fromwidth) 314 fromwidth = width; 315 if (save_p != p) 316 ep->save_from = strdup(save_p); 317 } 318 endutxent(); 319 320 #define HEADER_USER "USER" 321 #define HEADER_TTY "TTY" 322 #define HEADER_FROM "FROM" 323 #define HEADER_LOGIN_IDLE "LOGIN@ IDLE " 324 #define HEADER_WHAT "WHAT\n" 325 #define WUSED (W_DISPUSERSIZE + W_DISPLINESIZE + fromwidth + \ 326 sizeof(HEADER_LOGIN_IDLE) + 3) /* header width incl. spaces */ 327 328 if (sizeof(HEADER_FROM) > fromwidth) 329 fromwidth = sizeof(HEADER_FROM); 330 fromwidth++; 331 if (fromwidth > W_MAXHOSTSIZE) 332 fromwidth = W_MAXHOSTSIZE; 333 334 xo_open_container("uptime-information"); 335 336 if (header || wcmd == 0) { 337 pr_header(&now, nusers); 338 if (wcmd == 0) { 339 xo_close_container("uptime-information"); 340 if (xo_finish() < 0) 341 xo_err(1, "stdout"); 342 (void)kvm_close(kd); 343 exit(0); 344 } 345 346 xo_emit("{T:/%-*.*s} {T:/%-*.*s} {T:/%-*.*s} {T:/%s}", 347 W_DISPUSERSIZE, W_DISPUSERSIZE, HEADER_USER, 348 W_DISPLINESIZE, W_DISPLINESIZE, HEADER_TTY, 349 fromwidth, fromwidth, HEADER_FROM, 350 HEADER_LOGIN_IDLE HEADER_WHAT); 351 } 352 353 if ((kp = kvm_getprocs(kd, KERN_PROC_ALL, 0, &nentries)) == NULL) 354 xo_err(1, "%s", kvm_geterr(kd)); 355 for (i = 0; i < nentries; i++, kp++) { 356 if (kp->ki_stat == SIDL || kp->ki_stat == SZOMB || 357 kp->ki_tdev == NODEV) 358 continue; 359 for (ep = ehead; ep != NULL; ep = ep->next) { 360 if (ep->tdev == kp->ki_tdev) { 361 /* 362 * proc is associated with this terminal 363 */ 364 if (ep->kp == NULL && kp->ki_pgid == kp->ki_tpgid) { 365 /* 366 * Proc is 'most interesting' 367 */ 368 if (proc_compare(ep->kp, kp)) 369 ep->kp = kp; 370 } 371 /* 372 * Proc debug option info; add to debug 373 * list using kinfo_proc ki_spare[0] 374 * as next pointer; ptr to ptr avoids the 375 * ptr = long assumption. 376 */ 377 dkp = ep->dkp; 378 ep->dkp = kp; 379 debugproc(kp) = dkp; 380 } 381 } 382 } 383 if ((ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) == -1 && 384 ioctl(STDERR_FILENO, TIOCGWINSZ, &ws) == -1 && 385 ioctl(STDIN_FILENO, TIOCGWINSZ, &ws) == -1) || ws.ws_col == 0) 386 ttywidth = 79; 387 else 388 ttywidth = ws.ws_col - 1; 389 argwidth = ttywidth - WUSED; 390 if (argwidth < 4) 391 argwidth = 8; 392 /* Don't truncate if we're outputting json or XML. */ 393 if (xo_get_style(NULL) != XO_STYLE_TEXT) 394 argwidth = ARG_MAX; 395 for (ep = ehead; ep != NULL; ep = ep->next) { 396 if (ep->kp == NULL) { 397 ep->args = strdup("-"); 398 continue; 399 } 400 ep->args = fmt_argv(kvm_getargv(kd, ep->kp, argwidth), 401 ep->kp->ki_comm, NULL, MAXCOMLEN); 402 if (ep->args == NULL) 403 xo_err(1, "fmt_argv"); 404 } 405 /* sort by idle time */ 406 if (sortidle && ehead != NULL) { 407 struct entry *from, *save; 408 409 from = ehead; 410 ehead = NULL; 411 while (from != NULL) { 412 for (nextp = &ehead; 413 (*nextp) && from->idle >= (*nextp)->idle; 414 nextp = &(*nextp)->next) 415 continue; 416 save = from; 417 from = from->next; 418 save->next = *nextp; 419 *nextp = save; 420 } 421 } 422 423 xo_open_container("user-table"); 424 xo_open_list("user-entry"); 425 426 for (ep = ehead; ep != NULL; ep = ep->next) { 427 time_t t; 428 429 xo_open_instance("user-entry"); 430 431 if (dflag) { 432 xo_open_container("process-table"); 433 xo_open_list("process-entry"); 434 435 for (dkp = ep->dkp; dkp != NULL; dkp = debugproc(dkp)) { 436 const char *ptr; 437 438 ptr = fmt_argv(kvm_getargv(kd, dkp, argwidth), 439 dkp->ki_comm, NULL, MAXCOMLEN); 440 if (ptr == NULL) 441 ptr = "-"; 442 xo_open_instance("process-entry"); 443 xo_emit("\t\t{:process-id/%-9d/%d} " 444 "{:command/%hs}\n", dkp->ki_pid, ptr); 445 xo_close_instance("process-entry"); 446 } 447 xo_close_list("process-entry"); 448 xo_close_container("process-table"); 449 } 450 xo_emit("{:user/%-*.*s/%@**@s} {:tty/%-*.*s/%@**@s} ", 451 W_DISPUSERSIZE, W_DISPUSERSIZE, ep->utmp.ut_user, 452 W_DISPLINESIZE, W_DISPLINESIZE, 453 *ep->utmp.ut_line ? 454 (strncmp(ep->utmp.ut_line, "tty", 3) && 455 strncmp(ep->utmp.ut_line, "cua", 3) ? 456 ep->utmp.ut_line : ep->utmp.ut_line + 3) : "-"); 457 458 if (ep->save_from) 459 xo_attr("address", "%s", ep->save_from); 460 xo_emit("{:from/%-*.*s/%@**@s} ", 461 (int)fromwidth, (int)fromwidth, ep->from); 462 t = ep->utmp.ut_tv.tv_sec; 463 longattime = pr_attime(&t, &now); 464 longidle = pr_idle(ep->idle); 465 xo_emit("{:command/%.*hs/%@*@hs}\n", 466 (int)argwidth - longidle - longattime, 467 ep->args); 468 469 xo_close_instance("user-entry"); 470 } 471 472 xo_close_list("user-entry"); 473 xo_close_container("user-table"); 474 xo_close_container("uptime-information"); 475 if (xo_finish() < 0) 476 xo_err(1, "stdout"); 477 478 (void)kvm_close(kd); 479 exit(0); 480 } 481 482 static void 483 pr_header(time_t *nowp, int nusers) 484 { 485 char buf[64]; 486 struct sbuf upbuf; 487 double avenrun[3]; 488 struct timespec tp; 489 unsigned long days, hrs, mins, secs; 490 unsigned int i; 491 492 /* 493 * Print time of day. 494 */ 495 if (strftime(buf, sizeof(buf), 496 use_ampm ? "%l:%M%p" : "%k:%M", localtime(nowp)) != 0) 497 xo_emit("{:time-of-day/%s} ", buf); 498 /* 499 * Print how long system has been up. 500 */ 501 (void)sbuf_new(&upbuf, buf, sizeof(buf), SBUF_FIXEDLEN); 502 if (clock_gettime(CLOCK_UPTIME, &tp) != -1) { 503 xo_emit(" up"); 504 secs = tp.tv_sec; 505 xo_emit("{e:uptime/%lu}", secs); 506 mins = secs / 60; 507 secs %= 60; 508 hrs = mins / 60; 509 mins %= 60; 510 days = hrs / 24; 511 hrs %= 24; 512 xo_emit("{e:days/%ld}{e:hours/%ld}{e:minutes/%ld}{e:seconds/%ld}", 513 days, hrs, mins, secs); 514 515 /* If we've been up longer than 60 s, round to nearest min */ 516 if (tp.tv_sec > 60) { 517 secs = tp.tv_sec + 30; 518 mins = secs / 60; 519 secs = 0; 520 hrs = mins / 60; 521 mins %= 60; 522 days = hrs / 24; 523 hrs %= 24; 524 } 525 526 if (days > 0) 527 sbuf_printf(&upbuf, " %ld day%s,", 528 days, days > 1 ? "s" : ""); 529 if (hrs > 0 && mins > 0) 530 sbuf_printf(&upbuf, " %2ld:%02ld,", hrs, mins); 531 else if (hrs > 0) 532 sbuf_printf(&upbuf, " %ld hr%s,", 533 hrs, hrs > 1 ? "s" : ""); 534 else if (mins > 0) 535 sbuf_printf(&upbuf, " %ld min%s,", 536 mins, mins > 1 ? "s" : ""); 537 else 538 sbuf_printf(&upbuf, " %ld sec%s,", 539 secs, secs > 1 ? "s" : ""); 540 if (sbuf_finish(&upbuf) != 0) 541 xo_err(1, "Could not generate output"); 542 xo_emit("{:uptime-human/%s}", sbuf_data(&upbuf)); 543 sbuf_delete(&upbuf); 544 } 545 546 /* Print number of users logged in to system */ 547 xo_emit(" {:users/%d} {Np:user,users}", nusers); 548 549 /* 550 * Print 1, 5, and 15 minute load averages. 551 */ 552 if (getloadavg(avenrun, nitems(avenrun)) == -1) 553 xo_emit(", no load average information available\n"); 554 else { 555 static const char *format[] = { 556 " {:load-average-1/%.2f}", 557 " {:load-average-5/%.2f}", 558 " {:load-average-15/%.2f}", 559 }; 560 xo_emit(", load averages:"); 561 for (i = 0; i < nitems(avenrun); i++) { 562 if (use_comma && i > 0) 563 xo_emit(","); 564 xo_emit(format[i], avenrun[i]); 565 } 566 xo_emit("\n"); 567 } 568 } 569 570 static struct stat * 571 ttystat(char *line) 572 { 573 static struct stat sb; 574 char ttybuf[MAXPATHLEN]; 575 576 (void)snprintf(ttybuf, sizeof(ttybuf), "%s%s", _PATH_DEV, line); 577 if (stat(ttybuf, &sb) == 0 && S_ISCHR(sb.st_mode)) 578 return (&sb); 579 return (NULL); 580 } 581 582 static void 583 usage(int wcmd) 584 { 585 if (wcmd) 586 xo_error("usage: w [-dhin] [-M core] [-N system] [user ...]\n"); 587 else 588 xo_error("usage: uptime\n"); 589 xo_finish(); 590 exit(1); 591 } 592