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 33 #ifndef lint 34 static const char copyright[] = 35 "@(#) Copyright (c) 1980, 1991, 1993, 1994\n\ 36 The Regents of the University of California. All rights reserved.\n"; 37 #endif 38 39 #ifndef lint 40 static const char sccsid[] = "@(#)w.c 8.4 (Berkeley) 4/16/94"; 41 #endif 42 43 /* 44 * w - print system status (who and what) 45 * 46 * This program is similar to the systat command on Tenex/Tops 10/20 47 * 48 */ 49 #include <sys/param.h> 50 #include <sys/time.h> 51 #include <sys/stat.h> 52 #include <sys/sysctl.h> 53 #include <sys/proc.h> 54 #include <sys/user.h> 55 #include <sys/ioctl.h> 56 #include <sys/sbuf.h> 57 #include <sys/socket.h> 58 #include <sys/tty.h> 59 #include <sys/types.h> 60 61 #include <machine/cpu.h> 62 #include <netinet/in.h> 63 #include <arpa/inet.h> 64 #include <arpa/nameser.h> 65 66 #include <ctype.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 size_t ttywidth; /* width of tty */ 95 static size_t fromwidth = 0; /* max width of "from" field */ 96 static size_t argwidth; /* width of arguments */ 97 static int header = 1; /* true if -h flag: don't print heading */ 98 static int nflag; /* true if -n flag: don't convert addrs */ 99 static int dflag; /* true if -d flag: output debug info */ 100 static int sortidle; /* sort by idle time */ 101 int use_ampm; /* use AM/PM time */ 102 static int use_comma; /* use comma as floats separator */ 103 static char **sel_users; /* login array of particular users selected */ 104 105 /* 106 * One of these per active utmp entry. 107 */ 108 static struct entry { 109 struct entry *next; 110 struct utmpx utmp; 111 dev_t tdev; /* dev_t of terminal */ 112 time_t idle; /* idle time of terminal in seconds */ 113 struct kinfo_proc *kp; /* `most interesting' proc */ 114 char *args; /* arg list of interesting process */ 115 struct kinfo_proc *dkp; /* debug option proc list */ 116 char *from; /* "from": name or addr */ 117 char *save_from; /* original "from": name or addr */ 118 } *ep, *ehead = NULL, **nextp = &ehead; 119 120 #define debugproc(p) *(&((struct kinfo_proc *)p)->ki_udata) 121 122 #define W_DISPUSERSIZE 10 123 #define W_DISPLINESIZE 8 124 #define W_MAXHOSTSIZE 40 125 126 static void pr_header(time_t *, int); 127 static struct stat *ttystat(char *); 128 static void usage(int); 129 130 char *fmt_argv(char **, char *, char *, size_t); /* ../../bin/ps/fmt.c */ 131 132 int 133 main(int argc, char *argv[]) 134 { 135 struct kinfo_proc *kp; 136 struct kinfo_proc *dkp; 137 struct stat *stp; 138 time_t touched; 139 size_t width; 140 int ch, i, nentries, nusers, wcmd, longidle, longattime; 141 const char *memf, *nlistf, *p, *save_p; 142 char *x_suffix; 143 char errbuf[_POSIX2_LINE_MAX]; 144 char buf[MAXHOSTNAMELEN], fn[MAXHOSTNAMELEN]; 145 char *dot; 146 147 (void)setlocale(LC_ALL, ""); 148 use_ampm = (*nl_langinfo(T_FMT_AMPM) != '\0'); 149 use_comma = (*nl_langinfo(RADIXCHAR) != ','); 150 151 argc = xo_parse_args(argc, argv); 152 if (argc < 0) 153 exit(1); 154 155 /* Are we w(1) or uptime(1)? */ 156 if (strcmp(basename(argv[0]), "uptime") == 0) { 157 wcmd = 0; 158 p = ""; 159 } else { 160 wcmd = 1; 161 p = "dhiflM:N:nsuw"; 162 } 163 164 memf = _PATH_DEVNULL; 165 nlistf = NULL; 166 while ((ch = getopt(argc, argv, p)) != -1) 167 switch (ch) { 168 case 'd': 169 dflag = 1; 170 break; 171 case 'h': 172 header = 0; 173 break; 174 case 'i': 175 sortidle = 1; 176 break; 177 case 'M': 178 header = 0; 179 memf = optarg; 180 break; 181 case 'N': 182 nlistf = optarg; 183 break; 184 case 'n': 185 nflag += 1; 186 break; 187 case 'f': case 'l': case 's': case 'u': case 'w': 188 xo_warnx("-%c no longer supported", ch); 189 /* FALLTHROUGH */ 190 case '?': 191 default: 192 usage(wcmd); 193 } 194 argc -= optind; 195 argv += optind; 196 197 if (!(_res.options & RES_INIT)) 198 res_init(); 199 _res.retrans = 2; /* resolver timeout to 2 seconds per try */ 200 _res.retry = 1; /* only try once.. */ 201 202 if ((kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf)) == NULL) 203 xo_errx(1, "%s", errbuf); 204 205 (void)time(&now); 206 207 if (*argv) 208 sel_users = argv; 209 210 setutxent(); 211 for (nusers = 0; (utmp = getutxent()) != NULL;) { 212 struct addrinfo hints, *res; 213 struct sockaddr_storage ss; 214 struct sockaddr *sa = (struct sockaddr *)&ss; 215 struct sockaddr_in *lsin = (struct sockaddr_in *)&ss; 216 struct sockaddr_in6 *lsin6 = (struct sockaddr_in6 *)&ss; 217 int isaddr; 218 219 if (utmp->ut_type != USER_PROCESS) 220 continue; 221 if (!(stp = ttystat(utmp->ut_line))) 222 continue; /* corrupted record */ 223 ++nusers; 224 if (wcmd == 0) 225 continue; 226 if (sel_users) { 227 int usermatch; 228 char **user; 229 230 usermatch = 0; 231 for (user = sel_users; !usermatch && *user; user++) 232 if (!strcmp(utmp->ut_user, *user)) 233 usermatch = 1; 234 if (!usermatch) 235 continue; 236 } 237 if ((ep = calloc(1, sizeof(struct entry))) == NULL) 238 xo_errx(1, "calloc"); 239 *nextp = ep; 240 nextp = &ep->next; 241 memmove(&ep->utmp, utmp, sizeof *utmp); 242 ep->tdev = stp->st_rdev; 243 /* 244 * If this is the console device, attempt to ascertain 245 * the true console device dev_t. 246 */ 247 if (ep->tdev == 0) { 248 size_t size; 249 250 size = sizeof(dev_t); 251 (void)sysctlbyname("machdep.consdev", &ep->tdev, &size, NULL, 0); 252 } 253 touched = stp->st_atime; 254 if (touched < ep->utmp.ut_tv.tv_sec) { 255 /* tty untouched since before login */ 256 touched = ep->utmp.ut_tv.tv_sec; 257 } 258 if ((ep->idle = now - touched) < 0) 259 ep->idle = 0; 260 261 save_p = p = *ep->utmp.ut_host ? ep->utmp.ut_host : "-"; 262 if ((x_suffix = strrchr(p, ':')) != NULL) { 263 if ((dot = strchr(x_suffix, '.')) != NULL && 264 strchr(dot+1, '.') == NULL) 265 *x_suffix++ = '\0'; 266 else 267 x_suffix = NULL; 268 } 269 270 isaddr = 0; 271 memset(&ss, '\0', sizeof(ss)); 272 if (inet_pton(AF_INET6, p, &lsin6->sin6_addr) == 1) { 273 lsin6->sin6_len = sizeof(*lsin6); 274 lsin6->sin6_family = AF_INET6; 275 isaddr = 1; 276 } else if (inet_pton(AF_INET, p, &lsin->sin_addr) == 1) { 277 lsin->sin_len = sizeof(*lsin); 278 lsin->sin_family = AF_INET; 279 isaddr = 1; 280 } 281 if (nflag == 0) { 282 /* Attempt to change an IP address into a name */ 283 if (isaddr && realhostname_sa(fn, sizeof(fn), sa, 284 sa->sa_len) == HOSTNAME_FOUND) 285 p = fn; 286 } else if (!isaddr && nflag > 1) { 287 /* 288 * If a host has only one A/AAAA RR, change a 289 * name into an IP address 290 */ 291 memset(&hints, 0, sizeof(hints)); 292 hints.ai_flags = AI_PASSIVE; 293 hints.ai_family = AF_UNSPEC; 294 hints.ai_socktype = SOCK_STREAM; 295 if (getaddrinfo(p, NULL, &hints, &res) == 0) { 296 if (res->ai_next == NULL && 297 getnameinfo(res->ai_addr, res->ai_addrlen, 298 fn, sizeof(fn), NULL, 0, 299 NI_NUMERICHOST) == 0) 300 p = fn; 301 freeaddrinfo(res); 302 } 303 } 304 305 if (x_suffix) { 306 (void)snprintf(buf, sizeof(buf), "%s:%s", p, x_suffix); 307 p = buf; 308 } 309 ep->from = strdup(p); 310 if ((width = strlen(p)) > fromwidth) 311 fromwidth = width; 312 if (save_p != p) 313 ep->save_from = strdup(save_p); 314 } 315 endutxent(); 316 317 #define HEADER_USER "USER" 318 #define HEADER_TTY "TTY" 319 #define HEADER_FROM "FROM" 320 #define HEADER_LOGIN_IDLE "LOGIN@ IDLE " 321 #define HEADER_WHAT "WHAT\n" 322 #define WUSED (W_DISPUSERSIZE + W_DISPLINESIZE + fromwidth + \ 323 sizeof(HEADER_LOGIN_IDLE) + 3) /* header width incl. spaces */ 324 325 if (sizeof(HEADER_FROM) > fromwidth) 326 fromwidth = sizeof(HEADER_FROM); 327 fromwidth++; 328 if (fromwidth > W_MAXHOSTSIZE) 329 fromwidth = W_MAXHOSTSIZE; 330 331 xo_open_container("uptime-information"); 332 333 if (header || wcmd == 0) { 334 pr_header(&now, nusers); 335 if (wcmd == 0) { 336 xo_close_container("uptime-information"); 337 if (xo_finish() < 0) 338 xo_err(1, "stdout"); 339 (void)kvm_close(kd); 340 exit(0); 341 } 342 343 xo_emit("{T:/%-*.*s} {T:/%-*.*s} {T:/%-*.*s} {T:/%s}", 344 W_DISPUSERSIZE, W_DISPUSERSIZE, HEADER_USER, 345 W_DISPLINESIZE, W_DISPLINESIZE, HEADER_TTY, 346 fromwidth, fromwidth, HEADER_FROM, 347 HEADER_LOGIN_IDLE HEADER_WHAT); 348 } 349 350 if ((kp = kvm_getprocs(kd, KERN_PROC_ALL, 0, &nentries)) == NULL) 351 xo_err(1, "%s", kvm_geterr(kd)); 352 for (i = 0; i < nentries; i++, kp++) { 353 if (kp->ki_stat == SIDL || kp->ki_stat == SZOMB || 354 kp->ki_tdev == NODEV) 355 continue; 356 for (ep = ehead; ep != NULL; ep = ep->next) { 357 if (ep->tdev == kp->ki_tdev) { 358 /* 359 * proc is associated with this terminal 360 */ 361 if (ep->kp == NULL && kp->ki_pgid == kp->ki_tpgid) { 362 /* 363 * Proc is 'most interesting' 364 */ 365 if (proc_compare(ep->kp, kp)) 366 ep->kp = kp; 367 } 368 /* 369 * Proc debug option info; add to debug 370 * list using kinfo_proc ki_spare[0] 371 * as next pointer; ptr to ptr avoids the 372 * ptr = long assumption. 373 */ 374 dkp = ep->dkp; 375 ep->dkp = kp; 376 debugproc(kp) = dkp; 377 } 378 } 379 } 380 if ((ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) == -1 && 381 ioctl(STDERR_FILENO, TIOCGWINSZ, &ws) == -1 && 382 ioctl(STDIN_FILENO, TIOCGWINSZ, &ws) == -1) || ws.ws_col == 0) 383 ttywidth = 79; 384 else 385 ttywidth = ws.ws_col - 1; 386 argwidth = ttywidth - WUSED; 387 if (argwidth < 4) 388 argwidth = 8; 389 /* Don't truncate if we're outputting json or XML. */ 390 if (xo_get_style(NULL) != XO_STYLE_TEXT) 391 argwidth = ARG_MAX; 392 for (ep = ehead; ep != NULL; ep = ep->next) { 393 if (ep->kp == NULL) { 394 ep->args = strdup("-"); 395 continue; 396 } 397 ep->args = fmt_argv(kvm_getargv(kd, ep->kp, argwidth), 398 ep->kp->ki_comm, NULL, MAXCOMLEN); 399 if (ep->args == NULL) 400 xo_err(1, "fmt_argv"); 401 } 402 /* sort by idle time */ 403 if (sortidle && ehead != NULL) { 404 struct entry *from, *save; 405 406 from = ehead; 407 ehead = NULL; 408 while (from != NULL) { 409 for (nextp = &ehead; 410 (*nextp) && from->idle >= (*nextp)->idle; 411 nextp = &(*nextp)->next) 412 continue; 413 save = from; 414 from = from->next; 415 save->next = *nextp; 416 *nextp = save; 417 } 418 } 419 420 xo_open_container("user-table"); 421 xo_open_list("user-entry"); 422 423 for (ep = ehead; ep != NULL; ep = ep->next) { 424 time_t t; 425 426 xo_open_instance("user-entry"); 427 428 if (dflag) { 429 xo_open_container("process-table"); 430 xo_open_list("process-entry"); 431 432 for (dkp = ep->dkp; dkp != NULL; dkp = debugproc(dkp)) { 433 const char *ptr; 434 435 ptr = fmt_argv(kvm_getargv(kd, dkp, argwidth), 436 dkp->ki_comm, NULL, MAXCOMLEN); 437 if (ptr == NULL) 438 ptr = "-"; 439 xo_open_instance("process-entry"); 440 xo_emit("\t\t{:process-id/%-9d/%d} " 441 "{:command/%hs}\n", dkp->ki_pid, ptr); 442 xo_close_instance("process-entry"); 443 } 444 xo_close_list("process-entry"); 445 xo_close_container("process-table"); 446 } 447 xo_emit("{:user/%-*.*s/%@**@s} {:tty/%-*.*s/%@**@s} ", 448 W_DISPUSERSIZE, W_DISPUSERSIZE, ep->utmp.ut_user, 449 W_DISPLINESIZE, W_DISPLINESIZE, 450 *ep->utmp.ut_line ? 451 (strncmp(ep->utmp.ut_line, "tty", 3) && 452 strncmp(ep->utmp.ut_line, "cua", 3) ? 453 ep->utmp.ut_line : ep->utmp.ut_line + 3) : "-"); 454 455 if (ep->save_from) 456 xo_attr("address", "%s", ep->save_from); 457 xo_emit("{:from/%-*.*s/%@**@s} ", 458 (int)fromwidth, (int)fromwidth, ep->from); 459 t = ep->utmp.ut_tv.tv_sec; 460 longattime = pr_attime(&t, &now); 461 longidle = pr_idle(ep->idle); 462 xo_emit("{:command/%.*hs/%@*@hs}\n", 463 (int)argwidth - longidle - longattime, 464 ep->args); 465 466 xo_close_instance("user-entry"); 467 } 468 469 xo_close_list("user-entry"); 470 xo_close_container("user-table"); 471 xo_close_container("uptime-information"); 472 if (xo_finish() < 0) 473 xo_err(1, "stdout"); 474 475 (void)kvm_close(kd); 476 exit(0); 477 } 478 479 static void 480 pr_header(time_t *nowp, int nusers) 481 { 482 char buf[64]; 483 struct sbuf upbuf; 484 double avenrun[3]; 485 struct timespec tp; 486 unsigned long days, hrs, mins, secs; 487 unsigned int i; 488 489 /* 490 * Print time of day. 491 */ 492 if (strftime(buf, sizeof(buf), 493 use_ampm ? "%l:%M%p" : "%k:%M", localtime(nowp)) != 0) 494 xo_emit("{:time-of-day/%s} ", buf); 495 /* 496 * Print how long system has been up. 497 */ 498 (void)sbuf_new(&upbuf, buf, sizeof(buf), SBUF_FIXEDLEN); 499 if (clock_gettime(CLOCK_UPTIME, &tp) != -1) { 500 xo_emit(" up"); 501 secs = tp.tv_sec; 502 xo_emit("{e:uptime/%lu}", secs); 503 mins = secs / 60; 504 secs %= 60; 505 hrs = mins / 60; 506 mins %= 60; 507 days = hrs / 24; 508 hrs %= 24; 509 xo_emit("{e:days/%ld}{e:hours/%ld}{e:minutes/%ld}{e:seconds/%ld}", 510 days, hrs, mins, secs); 511 512 /* If we've been up longer than 60 s, round to nearest min */ 513 if (tp.tv_sec > 60) { 514 secs = tp.tv_sec + 30; 515 mins = secs / 60; 516 secs = 0; 517 hrs = mins / 60; 518 mins %= 60; 519 days = hrs / 24; 520 hrs %= 24; 521 } 522 523 if (days > 0) 524 sbuf_printf(&upbuf, " %ld day%s,", 525 days, days > 1 ? "s" : ""); 526 if (hrs > 0 && mins > 0) 527 sbuf_printf(&upbuf, " %2ld:%02ld,", hrs, mins); 528 else if (hrs > 0) 529 sbuf_printf(&upbuf, " %ld hr%s,", 530 hrs, hrs > 1 ? "s" : ""); 531 else if (mins > 0) 532 sbuf_printf(&upbuf, " %ld min%s,", 533 mins, mins > 1 ? "s" : ""); 534 else 535 sbuf_printf(&upbuf, " %ld sec%s,", 536 secs, secs > 1 ? "s" : ""); 537 if (sbuf_finish(&upbuf) != 0) 538 xo_err(1, "Could not generate output"); 539 xo_emit("{:uptime-human/%s}", sbuf_data(&upbuf)); 540 sbuf_delete(&upbuf); 541 } 542 543 /* Print number of users logged in to system */ 544 xo_emit(" {:users/%d} {Np:user,users}", nusers); 545 546 /* 547 * Print 1, 5, and 15 minute load averages. 548 */ 549 if (getloadavg(avenrun, nitems(avenrun)) == -1) 550 xo_emit(", no load average information available\n"); 551 else { 552 static const char *format[] = { 553 " {:load-average-1/%.2f}", 554 " {:load-average-5/%.2f}", 555 " {:load-average-15/%.2f}", 556 }; 557 xo_emit(", load averages:"); 558 for (i = 0; i < nitems(avenrun); i++) { 559 if (use_comma && i > 0) 560 xo_emit(","); 561 xo_emit(format[i], avenrun[i]); 562 } 563 xo_emit("\n"); 564 } 565 } 566 567 static struct stat * 568 ttystat(char *line) 569 { 570 static struct stat sb; 571 char ttybuf[MAXPATHLEN]; 572 573 (void)snprintf(ttybuf, sizeof(ttybuf), "%s%s", _PATH_DEV, line); 574 if (stat(ttybuf, &sb) == 0 && S_ISCHR(sb.st_mode)) 575 return (&sb); 576 return (NULL); 577 } 578 579 static void 580 usage(int wcmd) 581 { 582 if (wcmd) 583 xo_error("usage: w [-dhin] [-M core] [-N system] [user ...]\n"); 584 else 585 xo_error("usage: uptime\n"); 586 xo_finish(); 587 exit(1); 588 } 589