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 * w - print system status (who and what) 34 * 35 * This program is similar to the systat command on Tenex/Tops 10/20 36 * 37 */ 38 #include <sys/param.h> 39 #include <sys/time.h> 40 #include <sys/stat.h> 41 #include <sys/sysctl.h> 42 #include <sys/proc.h> 43 #include <sys/user.h> 44 #include <sys/ioctl.h> 45 #include <sys/sbuf.h> 46 #include <sys/socket.h> 47 #include <sys/tty.h> 48 #include <sys/types.h> 49 50 #include <machine/cpu.h> 51 #include <netinet/in.h> 52 #include <arpa/inet.h> 53 #include <arpa/nameser.h> 54 55 #include <ctype.h> 56 #include <errno.h> 57 #include <fcntl.h> 58 #include <kvm.h> 59 #include <langinfo.h> 60 #include <libgen.h> 61 #include <libutil.h> 62 #include <limits.h> 63 #include <locale.h> 64 #include <netdb.h> 65 #include <nlist.h> 66 #include <paths.h> 67 #include <resolv.h> 68 #include <stdio.h> 69 #include <stdlib.h> 70 #include <string.h> 71 #include <timeconv.h> 72 #include <unistd.h> 73 #include <utmpx.h> 74 #include <vis.h> 75 #include <libxo/xo.h> 76 77 #include "extern.h" 78 79 static struct utmpx *utmp; 80 static struct winsize ws; 81 static kvm_t *kd; 82 static time_t now; /* the current time of day */ 83 static size_t ttywidth; /* width of tty */ 84 static size_t fromwidth = 0; /* max width of "from" field */ 85 static size_t argwidth; /* width of arguments */ 86 static int header = 1; /* true if -h flag: don't print heading */ 87 static int nflag; /* true if -n flag: don't convert addrs */ 88 static int dflag; /* true if -d flag: output debug info */ 89 static int sortidle; /* sort by idle time */ 90 int use_ampm; /* use AM/PM time */ 91 static int use_comma; /* use comma as floats separator */ 92 static char **sel_users; /* login array of particular users selected */ 93 94 /* 95 * One of these per active utmp entry. 96 */ 97 static struct entry { 98 struct entry *next; 99 struct utmpx utmp; 100 dev_t tdev; /* dev_t of terminal */ 101 time_t idle; /* idle time of terminal in seconds */ 102 struct kinfo_proc *kp; /* `most interesting' proc */ 103 char *args; /* arg list of interesting process */ 104 struct kinfo_proc *dkp; /* debug option proc list */ 105 char *from; /* "from": name or addr */ 106 char *save_from; /* original "from": name or addr */ 107 } *ep, *ehead = NULL, **nextp = &ehead; 108 109 #define debugproc(p) *(&((struct kinfo_proc *)p)->ki_udata) 110 111 #define W_DISPUSERSIZE 10 112 #define W_DISPLINESIZE 8 113 #define W_MAXHOSTSIZE 40 114 115 static void pr_header(time_t *, int); 116 static struct stat *ttystat(char *); 117 static void usage(int); 118 119 char *fmt_argv(char **, char *, char *, size_t); /* ../../bin/ps/fmt.c */ 120 121 int 122 main(int argc, char *argv[]) 123 { 124 struct kinfo_proc *kp; 125 struct kinfo_proc *dkp; 126 struct stat *stp; 127 time_t touched; 128 size_t width; 129 int ch, i, nentries, nusers, wcmd, longidle, longattime; 130 const char *memf, *nlistf, *p, *save_p; 131 char *x_suffix; 132 char errbuf[_POSIX2_LINE_MAX]; 133 char buf[MAXHOSTNAMELEN], fn[MAXHOSTNAMELEN]; 134 char *dot; 135 136 (void)setlocale(LC_ALL, ""); 137 use_ampm = (*nl_langinfo(T_FMT_AMPM) != '\0'); 138 use_comma = (*nl_langinfo(RADIXCHAR) != ','); 139 140 argc = xo_parse_args(argc, argv); 141 if (argc < 0) 142 exit(1); 143 144 /* Are we w(1) or uptime(1)? */ 145 if (strcmp(basename(argv[0]), "uptime") == 0) { 146 wcmd = 0; 147 p = ""; 148 } else { 149 wcmd = 1; 150 p = "dhiflM:N:nsuw"; 151 } 152 153 memf = _PATH_DEVNULL; 154 nlistf = NULL; 155 while ((ch = getopt(argc, argv, p)) != -1) 156 switch (ch) { 157 case 'd': 158 dflag = 1; 159 break; 160 case 'h': 161 header = 0; 162 break; 163 case 'i': 164 sortidle = 1; 165 break; 166 case 'M': 167 header = 0; 168 memf = optarg; 169 break; 170 case 'N': 171 nlistf = optarg; 172 break; 173 case 'n': 174 nflag += 1; 175 break; 176 case 'f': case 'l': case 's': case 'u': case 'w': 177 xo_warnx("-%c no longer supported", ch); 178 /* FALLTHROUGH */ 179 case '?': 180 default: 181 usage(wcmd); 182 } 183 argc -= optind; 184 argv += optind; 185 186 if (!(_res.options & RES_INIT)) 187 res_init(); 188 _res.retrans = 2; /* resolver timeout to 2 seconds per try */ 189 _res.retry = 1; /* only try once.. */ 190 191 if ((kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf)) == NULL) 192 xo_errx(1, "%s", errbuf); 193 194 (void)time(&now); 195 196 if (*argv) 197 sel_users = argv; 198 199 setutxent(); 200 for (nusers = 0; (utmp = getutxent()) != NULL;) { 201 struct addrinfo hints, *res; 202 struct sockaddr_storage ss; 203 struct sockaddr *sa = (struct sockaddr *)&ss; 204 struct sockaddr_in *lsin = (struct sockaddr_in *)&ss; 205 struct sockaddr_in6 *lsin6 = (struct sockaddr_in6 *)&ss; 206 int isaddr; 207 208 if (utmp->ut_type != USER_PROCESS) 209 continue; 210 if (!(stp = ttystat(utmp->ut_line))) 211 continue; /* corrupted record */ 212 ++nusers; 213 if (wcmd == 0) 214 continue; 215 if (sel_users) { 216 int usermatch; 217 char **user; 218 219 usermatch = 0; 220 for (user = sel_users; !usermatch && *user; user++) 221 if (!strcmp(utmp->ut_user, *user)) 222 usermatch = 1; 223 if (!usermatch) 224 continue; 225 } 226 if ((ep = calloc(1, sizeof(struct entry))) == NULL) 227 xo_errx(1, "calloc"); 228 *nextp = ep; 229 nextp = &ep->next; 230 memmove(&ep->utmp, utmp, sizeof *utmp); 231 ep->tdev = stp->st_rdev; 232 /* 233 * If this is the console device, attempt to ascertain 234 * the true console device dev_t. 235 */ 236 if (ep->tdev == 0) { 237 size_t size; 238 239 size = sizeof(dev_t); 240 (void)sysctlbyname("machdep.consdev", &ep->tdev, &size, NULL, 0); 241 } 242 touched = stp->st_atime; 243 if (touched < ep->utmp.ut_tv.tv_sec) { 244 /* tty untouched since before login */ 245 touched = ep->utmp.ut_tv.tv_sec; 246 } 247 if ((ep->idle = now - touched) < 0) 248 ep->idle = 0; 249 250 save_p = p = *ep->utmp.ut_host ? ep->utmp.ut_host : "-"; 251 if ((x_suffix = strrchr(p, ':')) != NULL) { 252 if ((dot = strchr(x_suffix, '.')) != NULL && 253 strchr(dot+1, '.') == NULL) 254 *x_suffix++ = '\0'; 255 else 256 x_suffix = NULL; 257 } 258 259 isaddr = 0; 260 memset(&ss, '\0', sizeof(ss)); 261 if (inet_pton(AF_INET6, p, &lsin6->sin6_addr) == 1) { 262 lsin6->sin6_len = sizeof(*lsin6); 263 lsin6->sin6_family = AF_INET6; 264 isaddr = 1; 265 } else if (inet_pton(AF_INET, p, &lsin->sin_addr) == 1) { 266 lsin->sin_len = sizeof(*lsin); 267 lsin->sin_family = AF_INET; 268 isaddr = 1; 269 } 270 if (nflag == 0) { 271 /* Attempt to change an IP address into a name */ 272 if (isaddr && realhostname_sa(fn, sizeof(fn), sa, 273 sa->sa_len) == HOSTNAME_FOUND) 274 p = fn; 275 } else if (!isaddr && nflag > 1) { 276 /* 277 * If a host has only one A/AAAA RR, change a 278 * name into an IP address 279 */ 280 memset(&hints, 0, sizeof(hints)); 281 hints.ai_flags = AI_PASSIVE; 282 hints.ai_family = AF_UNSPEC; 283 hints.ai_socktype = SOCK_STREAM; 284 if (getaddrinfo(p, NULL, &hints, &res) == 0) { 285 if (res->ai_next == NULL && 286 getnameinfo(res->ai_addr, res->ai_addrlen, 287 fn, sizeof(fn), NULL, 0, 288 NI_NUMERICHOST) == 0) 289 p = fn; 290 freeaddrinfo(res); 291 } 292 } 293 294 if (x_suffix) { 295 (void)snprintf(buf, sizeof(buf), "%s:%s", p, x_suffix); 296 p = buf; 297 } 298 ep->from = strdup(p); 299 if ((width = strlen(p)) > fromwidth) 300 fromwidth = width; 301 if (save_p != p) 302 ep->save_from = strdup(save_p); 303 } 304 endutxent(); 305 306 #define HEADER_USER "USER" 307 #define HEADER_TTY "TTY" 308 #define HEADER_FROM "FROM" 309 #define HEADER_LOGIN_IDLE "LOGIN@ IDLE " 310 #define HEADER_WHAT "WHAT\n" 311 #define WUSED (W_DISPUSERSIZE + W_DISPLINESIZE + fromwidth + \ 312 sizeof(HEADER_LOGIN_IDLE) + 3) /* header width incl. spaces */ 313 314 if (sizeof(HEADER_FROM) > fromwidth) 315 fromwidth = sizeof(HEADER_FROM); 316 fromwidth++; 317 if (fromwidth > W_MAXHOSTSIZE) 318 fromwidth = W_MAXHOSTSIZE; 319 320 xo_open_container("uptime-information"); 321 322 if (header || wcmd == 0) { 323 pr_header(&now, nusers); 324 if (wcmd == 0) { 325 xo_close_container("uptime-information"); 326 if (xo_finish() < 0) 327 xo_err(1, "stdout"); 328 (void)kvm_close(kd); 329 exit(0); 330 } 331 332 xo_emit("{T:/%-*.*s} {T:/%-*.*s} {T:/%-*.*s} {T:/%s}", 333 W_DISPUSERSIZE, W_DISPUSERSIZE, HEADER_USER, 334 W_DISPLINESIZE, W_DISPLINESIZE, HEADER_TTY, 335 fromwidth, fromwidth, HEADER_FROM, 336 HEADER_LOGIN_IDLE HEADER_WHAT); 337 } 338 339 if ((kp = kvm_getprocs(kd, KERN_PROC_ALL, 0, &nentries)) == NULL) 340 xo_err(1, "%s", kvm_geterr(kd)); 341 for (i = 0; i < nentries; i++, kp++) { 342 if (kp->ki_stat == SIDL || kp->ki_stat == SZOMB || 343 kp->ki_tdev == NODEV) 344 continue; 345 for (ep = ehead; ep != NULL; ep = ep->next) { 346 if (ep->tdev == kp->ki_tdev) { 347 /* 348 * proc is associated with this terminal 349 */ 350 if (ep->kp == NULL && kp->ki_pgid == kp->ki_tpgid) { 351 /* 352 * Proc is 'most interesting' 353 */ 354 if (proc_compare(ep->kp, kp)) 355 ep->kp = kp; 356 } 357 /* 358 * Proc debug option info; add to debug 359 * list using kinfo_proc ki_spare[0] 360 * as next pointer; ptr to ptr avoids the 361 * ptr = long assumption. 362 */ 363 dkp = ep->dkp; 364 ep->dkp = kp; 365 debugproc(kp) = dkp; 366 } 367 } 368 } 369 if ((ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) == -1 && 370 ioctl(STDERR_FILENO, TIOCGWINSZ, &ws) == -1 && 371 ioctl(STDIN_FILENO, TIOCGWINSZ, &ws) == -1) || ws.ws_col == 0) 372 ttywidth = 79; 373 else 374 ttywidth = ws.ws_col - 1; 375 argwidth = ttywidth - WUSED; 376 if (argwidth < 4) 377 argwidth = 8; 378 /* Don't truncate if we're outputting json or XML. */ 379 if (xo_get_style(NULL) != XO_STYLE_TEXT) 380 argwidth = ARG_MAX; 381 for (ep = ehead; ep != NULL; ep = ep->next) { 382 if (ep->kp == NULL) { 383 ep->args = strdup("-"); 384 continue; 385 } 386 ep->args = fmt_argv(kvm_getargv(kd, ep->kp, argwidth), 387 ep->kp->ki_comm, NULL, MAXCOMLEN); 388 if (ep->args == NULL) 389 xo_err(1, "fmt_argv"); 390 } 391 /* sort by idle time */ 392 if (sortidle && ehead != NULL) { 393 struct entry *from, *save; 394 395 from = ehead; 396 ehead = NULL; 397 while (from != NULL) { 398 for (nextp = &ehead; 399 (*nextp) && from->idle >= (*nextp)->idle; 400 nextp = &(*nextp)->next) 401 continue; 402 save = from; 403 from = from->next; 404 save->next = *nextp; 405 *nextp = save; 406 } 407 } 408 409 xo_open_container("user-table"); 410 xo_open_list("user-entry"); 411 412 for (ep = ehead; ep != NULL; ep = ep->next) { 413 time_t t; 414 415 xo_open_instance("user-entry"); 416 417 if (dflag) { 418 xo_open_container("process-table"); 419 xo_open_list("process-entry"); 420 421 for (dkp = ep->dkp; dkp != NULL; dkp = debugproc(dkp)) { 422 const char *ptr; 423 424 ptr = fmt_argv(kvm_getargv(kd, dkp, argwidth), 425 dkp->ki_comm, NULL, MAXCOMLEN); 426 if (ptr == NULL) 427 ptr = "-"; 428 xo_open_instance("process-entry"); 429 xo_emit("\t\t{:process-id/%-9d/%d} " 430 "{:command/%hs}\n", dkp->ki_pid, ptr); 431 xo_close_instance("process-entry"); 432 } 433 xo_close_list("process-entry"); 434 xo_close_container("process-table"); 435 } 436 xo_emit("{:user/%-*.*s/%@**@s} {:tty/%-*.*s/%@**@s} ", 437 W_DISPUSERSIZE, W_DISPUSERSIZE, ep->utmp.ut_user, 438 W_DISPLINESIZE, W_DISPLINESIZE, 439 *ep->utmp.ut_line ? 440 (strncmp(ep->utmp.ut_line, "tty", 3) && 441 strncmp(ep->utmp.ut_line, "cua", 3) ? 442 ep->utmp.ut_line : ep->utmp.ut_line + 3) : "-"); 443 444 if (ep->save_from) 445 xo_attr("address", "%s", ep->save_from); 446 xo_emit("{:from/%-*.*s/%@**@s} ", 447 (int)fromwidth, (int)fromwidth, ep->from); 448 t = ep->utmp.ut_tv.tv_sec; 449 longattime = pr_attime(&t, &now); 450 longidle = pr_idle(ep->idle); 451 xo_emit("{:command/%.*hs/%@*@hs}\n", 452 (int)argwidth - longidle - longattime, 453 ep->args); 454 455 xo_close_instance("user-entry"); 456 } 457 458 xo_close_list("user-entry"); 459 xo_close_container("user-table"); 460 xo_close_container("uptime-information"); 461 if (xo_finish() < 0) 462 xo_err(1, "stdout"); 463 464 (void)kvm_close(kd); 465 exit(0); 466 } 467 468 static void 469 pr_header(time_t *nowp, int nusers) 470 { 471 char buf[64]; 472 struct sbuf upbuf; 473 double avenrun[3]; 474 struct timespec tp; 475 unsigned long days, hrs, mins, secs; 476 unsigned int i; 477 478 /* 479 * Print time of day. 480 */ 481 if (strftime(buf, sizeof(buf), 482 use_ampm ? "%l:%M%p" : "%k:%M", localtime(nowp)) != 0) 483 xo_emit("{:time-of-day/%s} ", buf); 484 /* 485 * Print how long system has been up. 486 */ 487 (void)sbuf_new(&upbuf, buf, sizeof(buf), SBUF_FIXEDLEN); 488 if (clock_gettime(CLOCK_UPTIME, &tp) != -1) { 489 xo_emit(" up"); 490 secs = tp.tv_sec; 491 xo_emit("{e:uptime/%lu}", secs); 492 mins = secs / 60; 493 secs %= 60; 494 hrs = mins / 60; 495 mins %= 60; 496 days = hrs / 24; 497 hrs %= 24; 498 xo_emit("{e:days/%ld}{e:hours/%ld}{e:minutes/%ld}{e:seconds/%ld}", 499 days, hrs, mins, secs); 500 501 /* If we've been up longer than 60 s, round to nearest min */ 502 if (tp.tv_sec > 60) { 503 secs = tp.tv_sec + 30; 504 mins = secs / 60; 505 secs = 0; 506 hrs = mins / 60; 507 mins %= 60; 508 days = hrs / 24; 509 hrs %= 24; 510 } 511 512 if (days > 0) 513 sbuf_printf(&upbuf, " %ld day%s,", 514 days, days > 1 ? "s" : ""); 515 if (hrs > 0 && mins > 0) 516 sbuf_printf(&upbuf, " %2ld:%02ld,", hrs, mins); 517 else if (hrs > 0) 518 sbuf_printf(&upbuf, " %ld hr%s,", 519 hrs, hrs > 1 ? "s" : ""); 520 else if (mins > 0) 521 sbuf_printf(&upbuf, " %ld min%s,", 522 mins, mins > 1 ? "s" : ""); 523 else 524 sbuf_printf(&upbuf, " %ld sec%s,", 525 secs, secs > 1 ? "s" : ""); 526 if (sbuf_finish(&upbuf) != 0) 527 xo_err(1, "Could not generate output"); 528 xo_emit("{:uptime-human/%s}", sbuf_data(&upbuf)); 529 sbuf_delete(&upbuf); 530 } 531 532 /* Print number of users logged in to system */ 533 xo_emit(" {:users/%d} {Np:user,users}", nusers); 534 535 /* 536 * Print 1, 5, and 15 minute load averages. 537 */ 538 if (getloadavg(avenrun, nitems(avenrun)) == -1) 539 xo_emit(", no load average information available\n"); 540 else { 541 static const char *format[] = { 542 " {:load-average-1/%.2f}", 543 " {:load-average-5/%.2f}", 544 " {:load-average-15/%.2f}", 545 }; 546 xo_emit(", load averages:"); 547 for (i = 0; i < nitems(avenrun); i++) { 548 if (use_comma && i > 0) 549 xo_emit(","); 550 xo_emit(format[i], avenrun[i]); 551 } 552 xo_emit("\n"); 553 } 554 } 555 556 static struct stat * 557 ttystat(char *line) 558 { 559 static struct stat sb; 560 char ttybuf[MAXPATHLEN]; 561 562 (void)snprintf(ttybuf, sizeof(ttybuf), "%s%s", _PATH_DEV, line); 563 if (stat(ttybuf, &sb) == 0 && S_ISCHR(sb.st_mode)) 564 return (&sb); 565 return (NULL); 566 } 567 568 static void 569 usage(int wcmd) 570 { 571 if (wcmd) 572 xo_error("usage: w [-dhin] [-M core] [-N system] [user ...]\n"); 573 else 574 xo_error("usage: uptime\n"); 575 xo_finish(); 576 exit(1); 577 } 578