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