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 40 /* 41 * w - print system status (who and what) 42 * 43 * This program is similar to the systat command on Tenex/Tops 10/20 44 * 45 */ 46 #include <sys/param.h> 47 #include <sys/time.h> 48 #include <sys/stat.h> 49 #include <sys/sysctl.h> 50 #include <sys/proc.h> 51 #include <sys/user.h> 52 #include <sys/ioctl.h> 53 #include <sys/sbuf.h> 54 #include <sys/socket.h> 55 #include <sys/tty.h> 56 #include <sys/types.h> 57 58 #include <machine/cpu.h> 59 #include <netinet/in.h> 60 #include <arpa/inet.h> 61 #include <arpa/nameser.h> 62 63 #include <ctype.h> 64 #include <errno.h> 65 #include <fcntl.h> 66 #include <kvm.h> 67 #include <langinfo.h> 68 #include <libgen.h> 69 #include <libutil.h> 70 #include <limits.h> 71 #include <locale.h> 72 #include <netdb.h> 73 #include <nlist.h> 74 #include <paths.h> 75 #include <resolv.h> 76 #include <stdio.h> 77 #include <stdlib.h> 78 #include <string.h> 79 #include <timeconv.h> 80 #include <unistd.h> 81 #include <utmpx.h> 82 #include <vis.h> 83 #include <libxo/xo.h> 84 85 #include "extern.h" 86 87 static struct utmpx *utmp; 88 static struct winsize ws; 89 static kvm_t *kd; 90 static time_t now; /* the current time of day */ 91 static size_t ttywidth; /* width of tty */ 92 static size_t fromwidth = 0; /* max width of "from" field */ 93 static size_t argwidth; /* width of arguments */ 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 char *from; /* "from": name or addr */ 114 char *save_from; /* original "from": name or addr */ 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_MAXHOSTSIZE 40 122 123 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 size_t width; 137 int ch, i, nentries, nusers, wcmd, longidle, longattime; 138 const char *memf, *nlistf, *p, *save_p; 139 char *x_suffix; 140 char errbuf[_POSIX2_LINE_MAX]; 141 char buf[MAXHOSTNAMELEN], fn[MAXHOSTNAMELEN]; 142 char *dot; 143 144 (void)setlocale(LC_ALL, ""); 145 use_ampm = (*nl_langinfo(T_FMT_AMPM) != '\0'); 146 use_comma = (*nl_langinfo(RADIXCHAR) != ','); 147 148 argc = xo_parse_args(argc, argv); 149 if (argc < 0) 150 exit(1); 151 152 /* Are we w(1) or uptime(1)? */ 153 if (strcmp(basename(argv[0]), "uptime") == 0) { 154 wcmd = 0; 155 p = ""; 156 } else { 157 wcmd = 1; 158 p = "dhiflM:N:nsuw"; 159 } 160 161 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 break; 178 case 'N': 179 nlistf = optarg; 180 break; 181 case 'n': 182 nflag += 1; 183 break; 184 case 'f': case 'l': case 's': case 'u': case 'w': 185 xo_warnx("-%c no longer supported", ch); 186 /* FALLTHROUGH */ 187 case '?': 188 default: 189 usage(wcmd); 190 } 191 argc -= optind; 192 argv += optind; 193 194 if (!(_res.options & RES_INIT)) 195 res_init(); 196 _res.retrans = 2; /* resolver timeout to 2 seconds per try */ 197 _res.retry = 1; /* only try once.. */ 198 199 if ((kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf)) == NULL) 200 xo_errx(1, "%s", errbuf); 201 202 (void)time(&now); 203 204 if (*argv) 205 sel_users = argv; 206 207 setutxent(); 208 for (nusers = 0; (utmp = getutxent()) != NULL;) { 209 struct addrinfo hints, *res; 210 struct sockaddr_storage ss; 211 struct sockaddr *sa = (struct sockaddr *)&ss; 212 struct sockaddr_in *lsin = (struct sockaddr_in *)&ss; 213 struct sockaddr_in6 *lsin6 = (struct sockaddr_in6 *)&ss; 214 int isaddr; 215 216 if (utmp->ut_type != USER_PROCESS) 217 continue; 218 if (!(stp = ttystat(utmp->ut_line))) 219 continue; /* corrupted record */ 220 ++nusers; 221 if (wcmd == 0) 222 continue; 223 if (sel_users) { 224 int usermatch; 225 char **user; 226 227 usermatch = 0; 228 for (user = sel_users; !usermatch && *user; user++) 229 if (!strcmp(utmp->ut_user, *user)) 230 usermatch = 1; 231 if (!usermatch) 232 continue; 233 } 234 if ((ep = calloc(1, sizeof(struct entry))) == NULL) 235 xo_errx(1, "calloc"); 236 *nextp = ep; 237 nextp = &ep->next; 238 memmove(&ep->utmp, utmp, sizeof *utmp); 239 ep->tdev = stp->st_rdev; 240 /* 241 * If this is the console device, attempt to ascertain 242 * the true console device dev_t. 243 */ 244 if (ep->tdev == 0) { 245 size_t size; 246 247 size = sizeof(dev_t); 248 (void)sysctlbyname("machdep.consdev", &ep->tdev, &size, NULL, 0); 249 } 250 touched = stp->st_atime; 251 if (touched < ep->utmp.ut_tv.tv_sec) { 252 /* tty untouched since before login */ 253 touched = ep->utmp.ut_tv.tv_sec; 254 } 255 if ((ep->idle = now - touched) < 0) 256 ep->idle = 0; 257 258 save_p = p = *ep->utmp.ut_host ? ep->utmp.ut_host : "-"; 259 if ((x_suffix = strrchr(p, ':')) != NULL) { 260 if ((dot = strchr(x_suffix, '.')) != NULL && 261 strchr(dot+1, '.') == NULL) 262 *x_suffix++ = '\0'; 263 else 264 x_suffix = NULL; 265 } 266 267 isaddr = 0; 268 memset(&ss, '\0', sizeof(ss)); 269 if (inet_pton(AF_INET6, p, &lsin6->sin6_addr) == 1) { 270 lsin6->sin6_len = sizeof(*lsin6); 271 lsin6->sin6_family = AF_INET6; 272 isaddr = 1; 273 } else if (inet_pton(AF_INET, p, &lsin->sin_addr) == 1) { 274 lsin->sin_len = sizeof(*lsin); 275 lsin->sin_family = AF_INET; 276 isaddr = 1; 277 } 278 if (nflag == 0) { 279 /* Attempt to change an IP address into a name */ 280 if (isaddr && realhostname_sa(fn, sizeof(fn), sa, 281 sa->sa_len) == HOSTNAME_FOUND) 282 p = fn; 283 } else if (!isaddr && nflag > 1) { 284 /* 285 * If a host has only one A/AAAA RR, change a 286 * name into an IP address 287 */ 288 memset(&hints, 0, sizeof(hints)); 289 hints.ai_flags = AI_PASSIVE; 290 hints.ai_family = AF_UNSPEC; 291 hints.ai_socktype = SOCK_STREAM; 292 if (getaddrinfo(p, NULL, &hints, &res) == 0) { 293 if (res->ai_next == NULL && 294 getnameinfo(res->ai_addr, res->ai_addrlen, 295 fn, sizeof(fn), NULL, 0, 296 NI_NUMERICHOST) == 0) 297 p = fn; 298 freeaddrinfo(res); 299 } 300 } 301 302 if (x_suffix) { 303 (void)snprintf(buf, sizeof(buf), "%s:%s", p, x_suffix); 304 p = buf; 305 } 306 ep->from = strdup(p); 307 if ((width = strlen(p)) > fromwidth) 308 fromwidth = width; 309 if (save_p != p) 310 ep->save_from = strdup(save_p); 311 } 312 endutxent(); 313 314 #define HEADER_USER "USER" 315 #define HEADER_TTY "TTY" 316 #define HEADER_FROM "FROM" 317 #define HEADER_LOGIN_IDLE "LOGIN@ IDLE " 318 #define HEADER_WHAT "WHAT\n" 319 #define WUSED (W_DISPUSERSIZE + W_DISPLINESIZE + fromwidth + \ 320 sizeof(HEADER_LOGIN_IDLE) + 3) /* header width incl. spaces */ 321 322 if (sizeof(HEADER_FROM) > fromwidth) 323 fromwidth = sizeof(HEADER_FROM); 324 fromwidth++; 325 if (fromwidth > W_MAXHOSTSIZE) 326 fromwidth = W_MAXHOSTSIZE; 327 328 xo_open_container("uptime-information"); 329 330 if (header || wcmd == 0) { 331 pr_header(&now, nusers); 332 if (wcmd == 0) { 333 xo_close_container("uptime-information"); 334 if (xo_finish() < 0) 335 xo_err(1, "stdout"); 336 (void)kvm_close(kd); 337 exit(0); 338 } 339 340 xo_emit("{T:/%-*.*s} {T:/%-*.*s} {T:/%-*.*s} {T:/%s}", 341 W_DISPUSERSIZE, W_DISPUSERSIZE, HEADER_USER, 342 W_DISPLINESIZE, W_DISPLINESIZE, HEADER_TTY, 343 fromwidth, fromwidth, HEADER_FROM, 344 HEADER_LOGIN_IDLE HEADER_WHAT); 345 } 346 347 if ((kp = kvm_getprocs(kd, KERN_PROC_ALL, 0, &nentries)) == NULL) 348 xo_err(1, "%s", kvm_geterr(kd)); 349 for (i = 0; i < nentries; i++, kp++) { 350 if (kp->ki_stat == SIDL || kp->ki_stat == SZOMB || 351 kp->ki_tdev == NODEV) 352 continue; 353 for (ep = ehead; ep != NULL; ep = ep->next) { 354 if (ep->tdev == kp->ki_tdev) { 355 /* 356 * proc is associated with this terminal 357 */ 358 if (ep->kp == NULL && kp->ki_pgid == kp->ki_tpgid) { 359 /* 360 * Proc is 'most interesting' 361 */ 362 if (proc_compare(ep->kp, kp)) 363 ep->kp = kp; 364 } 365 /* 366 * Proc debug option info; add to debug 367 * list using kinfo_proc ki_spare[0] 368 * as next pointer; ptr to ptr avoids the 369 * ptr = long assumption. 370 */ 371 dkp = ep->dkp; 372 ep->dkp = kp; 373 debugproc(kp) = dkp; 374 } 375 } 376 } 377 if ((ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) == -1 && 378 ioctl(STDERR_FILENO, TIOCGWINSZ, &ws) == -1 && 379 ioctl(STDIN_FILENO, TIOCGWINSZ, &ws) == -1) || ws.ws_col == 0) 380 ttywidth = 79; 381 else 382 ttywidth = ws.ws_col - 1; 383 argwidth = ttywidth - WUSED; 384 if (argwidth < 4) 385 argwidth = 8; 386 /* Don't truncate if we're outputting json or XML. */ 387 if (xo_get_style(NULL) != XO_STYLE_TEXT) 388 argwidth = ARG_MAX; 389 for (ep = ehead; ep != NULL; ep = ep->next) { 390 if (ep->kp == NULL) { 391 ep->args = strdup("-"); 392 continue; 393 } 394 ep->args = fmt_argv(kvm_getargv(kd, ep->kp, argwidth), 395 ep->kp->ki_comm, NULL, MAXCOMLEN); 396 if (ep->args == NULL) 397 xo_err(1, "fmt_argv"); 398 } 399 /* sort by idle time */ 400 if (sortidle && ehead != NULL) { 401 struct entry *from, *save; 402 403 from = ehead; 404 ehead = NULL; 405 while (from != NULL) { 406 for (nextp = &ehead; 407 (*nextp) && from->idle >= (*nextp)->idle; 408 nextp = &(*nextp)->next) 409 continue; 410 save = from; 411 from = from->next; 412 save->next = *nextp; 413 *nextp = save; 414 } 415 } 416 417 xo_open_container("user-table"); 418 xo_open_list("user-entry"); 419 420 for (ep = ehead; ep != NULL; ep = ep->next) { 421 time_t t; 422 423 xo_open_instance("user-entry"); 424 425 if (dflag) { 426 xo_open_container("process-table"); 427 xo_open_list("process-entry"); 428 429 for (dkp = ep->dkp; dkp != NULL; dkp = debugproc(dkp)) { 430 const char *ptr; 431 432 ptr = fmt_argv(kvm_getargv(kd, dkp, argwidth), 433 dkp->ki_comm, NULL, MAXCOMLEN); 434 if (ptr == NULL) 435 ptr = "-"; 436 xo_open_instance("process-entry"); 437 xo_emit("\t\t{:process-id/%-9d/%d} " 438 "{:command/%hs}\n", dkp->ki_pid, ptr); 439 xo_close_instance("process-entry"); 440 } 441 xo_close_list("process-entry"); 442 xo_close_container("process-table"); 443 } 444 xo_emit("{:user/%-*.*s/%@**@s} {:tty/%-*.*s/%@**@s} ", 445 W_DISPUSERSIZE, W_DISPUSERSIZE, ep->utmp.ut_user, 446 W_DISPLINESIZE, W_DISPLINESIZE, 447 *ep->utmp.ut_line ? 448 (strncmp(ep->utmp.ut_line, "tty", 3) && 449 strncmp(ep->utmp.ut_line, "cua", 3) ? 450 ep->utmp.ut_line : ep->utmp.ut_line + 3) : "-"); 451 452 if (ep->save_from) 453 xo_attr("address", "%s", ep->save_from); 454 xo_emit("{:from/%-*.*s/%@**@s} ", 455 (int)fromwidth, (int)fromwidth, ep->from); 456 t = ep->utmp.ut_tv.tv_sec; 457 longattime = pr_attime(&t, &now); 458 longidle = pr_idle(ep->idle); 459 xo_emit("{:command/%.*hs/%@*@hs}\n", 460 (int)argwidth - longidle - longattime, 461 ep->args); 462 463 xo_close_instance("user-entry"); 464 } 465 466 xo_close_list("user-entry"); 467 xo_close_container("user-table"); 468 xo_close_container("uptime-information"); 469 if (xo_finish() < 0) 470 xo_err(1, "stdout"); 471 472 (void)kvm_close(kd); 473 exit(0); 474 } 475 476 static void 477 pr_header(time_t *nowp, int nusers) 478 { 479 char buf[64]; 480 struct sbuf upbuf; 481 double avenrun[3]; 482 struct timespec tp; 483 unsigned long days, hrs, mins, secs; 484 unsigned int i; 485 486 /* 487 * Print time of day. 488 */ 489 if (strftime(buf, sizeof(buf), 490 use_ampm ? "%l:%M%p" : "%k:%M", localtime(nowp)) != 0) 491 xo_emit("{:time-of-day/%s} ", buf); 492 /* 493 * Print how long system has been up. 494 */ 495 (void)sbuf_new(&upbuf, buf, sizeof(buf), SBUF_FIXEDLEN); 496 if (clock_gettime(CLOCK_UPTIME, &tp) != -1) { 497 xo_emit(" up"); 498 secs = tp.tv_sec; 499 xo_emit("{e:uptime/%lu}", secs); 500 mins = secs / 60; 501 secs %= 60; 502 hrs = mins / 60; 503 mins %= 60; 504 days = hrs / 24; 505 hrs %= 24; 506 xo_emit("{e:days/%ld}{e:hours/%ld}{e:minutes/%ld}{e:seconds/%ld}", 507 days, hrs, mins, secs); 508 509 /* If we've been up longer than 60 s, round to nearest min */ 510 if (tp.tv_sec > 60) { 511 secs = tp.tv_sec + 30; 512 mins = secs / 60; 513 secs = 0; 514 hrs = mins / 60; 515 mins %= 60; 516 days = hrs / 24; 517 hrs %= 24; 518 } 519 520 if (days > 0) 521 sbuf_printf(&upbuf, " %ld day%s,", 522 days, days > 1 ? "s" : ""); 523 if (hrs > 0 && mins > 0) 524 sbuf_printf(&upbuf, " %2ld:%02ld,", hrs, mins); 525 else if (hrs > 0) 526 sbuf_printf(&upbuf, " %ld hr%s,", 527 hrs, hrs > 1 ? "s" : ""); 528 else if (mins > 0) 529 sbuf_printf(&upbuf, " %ld min%s,", 530 mins, mins > 1 ? "s" : ""); 531 else 532 sbuf_printf(&upbuf, " %ld sec%s,", 533 secs, secs > 1 ? "s" : ""); 534 if (sbuf_finish(&upbuf) != 0) 535 xo_err(1, "Could not generate output"); 536 xo_emit("{:uptime-human/%s}", sbuf_data(&upbuf)); 537 sbuf_delete(&upbuf); 538 } 539 540 /* Print number of users logged in to system */ 541 xo_emit(" {:users/%d} {Np:user,users}", nusers); 542 543 /* 544 * Print 1, 5, and 15 minute load averages. 545 */ 546 if (getloadavg(avenrun, nitems(avenrun)) == -1) 547 xo_emit(", no load average information available\n"); 548 else { 549 static const char *format[] = { 550 " {:load-average-1/%.2f}", 551 " {:load-average-5/%.2f}", 552 " {:load-average-15/%.2f}", 553 }; 554 xo_emit(", load averages:"); 555 for (i = 0; i < nitems(avenrun); i++) { 556 if (use_comma && i > 0) 557 xo_emit(","); 558 xo_emit(format[i], avenrun[i]); 559 } 560 xo_emit("\n"); 561 } 562 } 563 564 static struct stat * 565 ttystat(char *line) 566 { 567 static struct stat sb; 568 char ttybuf[MAXPATHLEN]; 569 570 (void)snprintf(ttybuf, sizeof(ttybuf), "%s%s", _PATH_DEV, line); 571 if (stat(ttybuf, &sb) == 0 && S_ISCHR(sb.st_mode)) 572 return (&sb); 573 return (NULL); 574 } 575 576 static void 577 usage(int wcmd) 578 { 579 if (wcmd) 580 xo_error("usage: w [-dhin] [-M core] [-N system] [user ...]\n"); 581 else 582 xo_error("usage: uptime\n"); 583 xo_finish(); 584 exit(1); 585 } 586