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