1 /*- 2 * Copyright (c) 1980, 1991, 1993, 1994 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 4. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #include <sys/cdefs.h> 31 32 __FBSDID("$FreeBSD$"); 33 34 #ifndef lint 35 static const char copyright[] = 36 "@(#) Copyright (c) 1980, 1991, 1993, 1994\n\ 37 The Regents of the University of California. All rights reserved.\n"; 38 #endif 39 40 #ifndef lint 41 static const char sccsid[] = "@(#)w.c 8.4 (Berkeley) 4/16/94"; 42 #endif 43 44 /* 45 * w - print system status (who and what) 46 * 47 * This program is similar to the systat command on Tenex/Tops 10/20 48 * 49 */ 50 #include <sys/param.h> 51 #include <sys/time.h> 52 #include <sys/stat.h> 53 #include <sys/sysctl.h> 54 #include <sys/proc.h> 55 #include <sys/user.h> 56 #include <sys/ioctl.h> 57 #include <sys/sbuf.h> 58 #include <sys/socket.h> 59 #include <sys/tty.h> 60 #include <sys/types.h> 61 62 #include <machine/cpu.h> 63 #include <netinet/in.h> 64 #include <arpa/inet.h> 65 #include <arpa/nameser.h> 66 67 #include <ctype.h> 68 #include <err.h> 69 #include <errno.h> 70 #include <fcntl.h> 71 #include <kvm.h> 72 #include <langinfo.h> 73 #include <libgen.h> 74 #include <libutil.h> 75 #include <limits.h> 76 #include <locale.h> 77 #include <netdb.h> 78 #include <nlist.h> 79 #include <paths.h> 80 #include <resolv.h> 81 #include <stdio.h> 82 #include <stdlib.h> 83 #include <string.h> 84 #include <timeconv.h> 85 #include <unistd.h> 86 #include <utmpx.h> 87 #include <vis.h> 88 #include <libxo/xo.h> 89 90 #include "extern.h" 91 92 static struct utmpx *utmp; 93 static struct winsize ws; 94 static kvm_t *kd; 95 static time_t now; /* the current time of day */ 96 static int ttywidth; /* width of tty */ 97 static int argwidth; /* width of tty */ 98 static int header = 1; /* true if -h flag: don't print heading */ 99 static int nflag; /* true if -n flag: don't convert addrs */ 100 static int dflag; /* true if -d flag: output debug info */ 101 static int sortidle; /* sort by idle time */ 102 int use_ampm; /* use AM/PM time */ 103 static int use_comma; /* use comma as floats separator */ 104 static char **sel_users; /* login array of particular users selected */ 105 106 /* 107 * One of these per active utmp entry. 108 */ 109 static struct entry { 110 struct entry *next; 111 struct utmpx utmp; 112 dev_t tdev; /* dev_t of terminal */ 113 time_t idle; /* idle time of terminal in seconds */ 114 struct kinfo_proc *kp; /* `most interesting' proc */ 115 char *args; /* arg list of interesting process */ 116 struct kinfo_proc *dkp; /* debug option proc list */ 117 } *ep, *ehead = NULL, **nextp = &ehead; 118 119 #define debugproc(p) *(&((struct kinfo_proc *)p)->ki_udata) 120 121 #define W_DISPUSERSIZE 10 122 #define W_DISPLINESIZE 8 123 #define W_DISPHOSTSIZE 40 124 125 static void pr_header(time_t *, int); 126 static struct stat *ttystat(char *); 127 static void usage(int); 128 129 char *fmt_argv(char **, char *, char *, size_t); /* ../../bin/ps/fmt.c */ 130 131 int 132 main(int argc, char *argv[]) 133 { 134 struct kinfo_proc *kp; 135 struct kinfo_proc *dkp; 136 struct stat *stp; 137 time_t touched; 138 int ch, i, nentries, nusers, wcmd, longidle, longattime; 139 const char *memf, *nlistf, *p, *save_p; 140 char *x_suffix; 141 char buf[MAXHOSTNAMELEN], errbuf[_POSIX2_LINE_MAX]; 142 char fn[MAXHOSTNAMELEN]; 143 char *dot; 144 145 (void)setlocale(LC_ALL, ""); 146 use_ampm = (*nl_langinfo(T_FMT_AMPM) != '\0'); 147 use_comma = (*nl_langinfo(RADIXCHAR) != ','); 148 149 argc = xo_parse_args(argc, argv); 150 if (argc < 0) 151 exit(1); 152 153 /* Are we w(1) or uptime(1)? */ 154 if (strcmp(basename(argv[0]), "uptime") == 0) { 155 wcmd = 0; 156 p = ""; 157 } else { 158 wcmd = 1; 159 p = "dhiflM:N:nsuw"; 160 } 161 162 memf = _PATH_DEVNULL; 163 nlistf = NULL; 164 while ((ch = getopt(argc, argv, p)) != -1) 165 switch (ch) { 166 case 'd': 167 dflag = 1; 168 break; 169 case 'h': 170 header = 0; 171 break; 172 case 'i': 173 sortidle = 1; 174 break; 175 case 'M': 176 header = 0; 177 memf = optarg; 178 break; 179 case 'N': 180 nlistf = optarg; 181 break; 182 case 'n': 183 nflag = 1; 184 break; 185 case 'f': case 'l': case 's': case 'u': case 'w': 186 warnx("[-flsuw] no longer supported"); 187 /* FALLTHROUGH */ 188 case '?': 189 default: 190 usage(wcmd); 191 } 192 argc -= optind; 193 argv += optind; 194 195 if (!(_res.options & RES_INIT)) 196 res_init(); 197 _res.retrans = 2; /* resolver timeout to 2 seconds per try */ 198 _res.retry = 1; /* only try once.. */ 199 200 if ((kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf)) == NULL) 201 errx(1, "%s", errbuf); 202 203 (void)time(&now); 204 205 if (*argv) 206 sel_users = argv; 207 208 setutxent(); 209 for (nusers = 0; (utmp = getutxent()) != NULL;) { 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 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 endutxent(); 253 254 xo_open_container("uptime-information"); 255 256 if (header || wcmd == 0) { 257 pr_header(&now, nusers); 258 if (wcmd == 0) { 259 xo_close_container("uptime-information"); 260 xo_finish(); 261 262 (void)kvm_close(kd); 263 exit(0); 264 } 265 266 #define HEADER_USER "USER" 267 #define HEADER_TTY "TTY" 268 #define HEADER_FROM "FROM" 269 #define HEADER_LOGIN_IDLE "LOGIN@ IDLE " 270 #define HEADER_WHAT "WHAT\n" 271 #define WUSED (W_DISPUSERSIZE + W_DISPLINESIZE + W_DISPHOSTSIZE + \ 272 sizeof(HEADER_LOGIN_IDLE) + 3) /* header width incl. spaces */ 273 xo_emit("{T:/%-*.*s} {T:/%-*.*s} {T:/%-*.*s} {T:/%s}", 274 W_DISPUSERSIZE, W_DISPUSERSIZE, HEADER_USER, 275 W_DISPLINESIZE, W_DISPLINESIZE, HEADER_TTY, 276 W_DISPHOSTSIZE, W_DISPHOSTSIZE, HEADER_FROM, 277 HEADER_LOGIN_IDLE HEADER_WHAT); 278 } 279 280 if ((kp = kvm_getprocs(kd, KERN_PROC_ALL, 0, &nentries)) == NULL) 281 err(1, "%s", kvm_geterr(kd)); 282 for (i = 0; i < nentries; i++, kp++) { 283 if (kp->ki_stat == SIDL || kp->ki_stat == SZOMB || 284 kp->ki_tdev == NODEV) 285 continue; 286 for (ep = ehead; ep != NULL; ep = ep->next) { 287 if (ep->tdev == kp->ki_tdev) { 288 /* 289 * proc is associated with this terminal 290 */ 291 if (ep->kp == NULL && kp->ki_pgid == kp->ki_tpgid) { 292 /* 293 * Proc is 'most interesting' 294 */ 295 if (proc_compare(ep->kp, kp)) 296 ep->kp = kp; 297 } 298 /* 299 * Proc debug option info; add to debug 300 * list using kinfo_proc ki_spare[0] 301 * as next pointer; ptr to ptr avoids the 302 * ptr = long assumption. 303 */ 304 dkp = ep->dkp; 305 ep->dkp = kp; 306 debugproc(kp) = dkp; 307 } 308 } 309 } 310 if ((ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) == -1 && 311 ioctl(STDERR_FILENO, TIOCGWINSZ, &ws) == -1 && 312 ioctl(STDIN_FILENO, TIOCGWINSZ, &ws) == -1) || ws.ws_col == 0) 313 ttywidth = 79; 314 else 315 ttywidth = ws.ws_col - 1; 316 argwidth = ttywidth - WUSED; 317 if (argwidth < 4) 318 argwidth = 8; 319 for (ep = ehead; ep != NULL; ep = ep->next) { 320 if (ep->kp == NULL) { 321 ep->args = strdup("-"); 322 continue; 323 } 324 ep->args = fmt_argv(kvm_getargv(kd, ep->kp, argwidth), 325 ep->kp->ki_comm, NULL, MAXCOMLEN); 326 if (ep->args == NULL) 327 err(1, NULL); 328 } 329 /* sort by idle time */ 330 if (sortidle && ehead != NULL) { 331 struct entry *from, *save; 332 333 from = ehead; 334 ehead = NULL; 335 while (from != NULL) { 336 for (nextp = &ehead; 337 (*nextp) && from->idle >= (*nextp)->idle; 338 nextp = &(*nextp)->next) 339 continue; 340 save = from; 341 from = from->next; 342 save->next = *nextp; 343 *nextp = save; 344 } 345 } 346 347 xo_open_container("user-table"); 348 xo_open_list("user-entry"); 349 350 for (ep = ehead; ep != NULL; ep = ep->next) { 351 struct addrinfo hints, *res; 352 struct sockaddr_storage ss; 353 struct sockaddr *sa = (struct sockaddr *)&ss; 354 struct sockaddr_in *lsin = (struct sockaddr_in *)&ss; 355 struct sockaddr_in6 *lsin6 = (struct sockaddr_in6 *)&ss; 356 time_t t; 357 int isaddr; 358 359 xo_open_instance("user-entry"); 360 361 save_p = p = *ep->utmp.ut_host ? ep->utmp.ut_host : "-"; 362 if ((x_suffix = strrchr(p, ':')) != NULL) { 363 if ((dot = strchr(x_suffix, '.')) != NULL && 364 strchr(dot+1, '.') == NULL) 365 *x_suffix++ = '\0'; 366 else 367 x_suffix = NULL; 368 } 369 370 isaddr = 0; 371 memset(&ss, '\0', sizeof(ss)); 372 if (inet_pton(AF_INET6, p, &lsin6->sin6_addr) == 1) { 373 lsin6->sin6_len = sizeof(*lsin6); 374 lsin6->sin6_family = AF_INET6; 375 isaddr = 1; 376 } else if (inet_pton(AF_INET, p, &lsin->sin_addr) == 1) { 377 lsin->sin_len = sizeof(*lsin); 378 lsin->sin_family = AF_INET; 379 isaddr = 1; 380 } 381 if (!nflag) { 382 /* Attempt to change an IP address into a name */ 383 if (isaddr && realhostname_sa(fn, sizeof(fn), sa, 384 sa->sa_len) == HOSTNAME_FOUND) 385 p = fn; 386 } else if (!isaddr) { 387 /* 388 * If a host has only one A/AAAA RR, change a 389 * name into an IP address 390 */ 391 memset(&hints, 0, sizeof(hints)); 392 hints.ai_flags = AI_PASSIVE; 393 hints.ai_family = AF_UNSPEC; 394 hints.ai_socktype = SOCK_STREAM; 395 if (getaddrinfo(p, NULL, &hints, &res) == 0) { 396 if (res->ai_next == NULL && 397 getnameinfo(res->ai_addr, res->ai_addrlen, 398 fn, sizeof(fn), NULL, 0, 399 NI_NUMERICHOST) == 0) 400 p = fn; 401 freeaddrinfo(res); 402 } 403 } 404 405 if (x_suffix) { 406 (void)snprintf(buf, sizeof(buf), "%s:%s", p, x_suffix); 407 p = buf; 408 } 409 if (dflag) { 410 xo_open_container("process-table"); 411 xo_open_list("process-entry"); 412 413 for (dkp = ep->dkp; dkp != NULL; dkp = debugproc(dkp)) { 414 const char *ptr; 415 416 ptr = fmt_argv(kvm_getargv(kd, dkp, argwidth), 417 dkp->ki_comm, NULL, MAXCOMLEN); 418 if (ptr == NULL) 419 ptr = "-"; 420 xo_open_instance("process-entry"); 421 xo_emit("\t\t{:process-id/%-9d/%d} {:command/%s}\n", 422 dkp->ki_pid, ptr); 423 xo_close_instance("process-entry"); 424 } 425 xo_close_list("process-entry"); 426 xo_close_container("process-table"); 427 } 428 xo_emit("{:user/%-*.*s/%@**@s} {:tty/%-*.*s/%@**@s} ", 429 W_DISPUSERSIZE, W_DISPUSERSIZE, ep->utmp.ut_user, 430 W_DISPLINESIZE, W_DISPLINESIZE, 431 *ep->utmp.ut_line ? 432 (strncmp(ep->utmp.ut_line, "tty", 3) && 433 strncmp(ep->utmp.ut_line, "cua", 3) ? 434 ep->utmp.ut_line : ep->utmp.ut_line + 3) : "-"); 435 436 if (save_p && save_p != p) 437 xo_attr("address", "%s", save_p); 438 xo_emit("{:from/%-*.*s/%@**@s} ", 439 W_DISPHOSTSIZE, W_DISPHOSTSIZE, *p ? p : "-"); 440 t = ep->utmp.ut_tv.tv_sec; 441 longattime = pr_attime(&t, &now); 442 longidle = pr_idle(ep->idle); 443 xo_emit("{:command/%.*s/%@*@s}\n", 444 argwidth - longidle - longattime, 445 ep->args); 446 447 xo_close_instance("user-entry"); 448 } 449 450 xo_close_list("user-entry"); 451 xo_close_container("user-table"); 452 xo_close_container("uptime-information"); 453 xo_finish(); 454 455 (void)kvm_close(kd); 456 exit(0); 457 } 458 459 static void 460 pr_header(time_t *nowp, int nusers) 461 { 462 double avenrun[3]; 463 time_t uptime; 464 struct timespec tp; 465 int days, hrs, i, mins, secs; 466 char buf[256]; 467 struct sbuf *upbuf; 468 469 upbuf = sbuf_new_auto(); 470 /* 471 * Print time of day. 472 */ 473 if (strftime(buf, sizeof(buf), 474 use_ampm ? "%l:%M%p" : "%k:%M", localtime(nowp)) != 0) 475 xo_emit("{:time-of-day/%s} ", buf); 476 /* 477 * Print how long system has been up. 478 */ 479 if (clock_gettime(CLOCK_UPTIME, &tp) != -1) { 480 uptime = tp.tv_sec; 481 if (uptime > 60) 482 uptime += 30; 483 days = uptime / 86400; 484 uptime %= 86400; 485 hrs = uptime / 3600; 486 uptime %= 3600; 487 mins = uptime / 60; 488 secs = uptime % 60; 489 xo_emit(" up"); 490 xo_emit("{e:uptime/%lu}", (unsigned long) tp.tv_sec); 491 xo_emit("{e:days/%d}{e:hours/%d}{e:minutes/%d}{e:seconds/%d}", days, hrs, mins, secs); 492 493 if (days > 0) 494 sbuf_printf(upbuf, " %d day%s,", 495 days, days > 1 ? "s" : ""); 496 if (hrs > 0 && mins > 0) 497 sbuf_printf(upbuf, " %2d:%02d,", hrs, mins); 498 else if (hrs > 0) 499 sbuf_printf(upbuf, " %d hr%s,", 500 hrs, hrs > 1 ? "s" : ""); 501 else if (mins > 0) 502 sbuf_printf(upbuf, " %d min%s,", 503 mins, mins > 1 ? "s" : ""); 504 else 505 sbuf_printf(upbuf, " %d sec%s,", 506 secs, secs > 1 ? "s" : ""); 507 if (sbuf_finish(upbuf) != 0) 508 xo_err(1, "Could not generate output"); 509 xo_emit("{:uptime-human/%s}", sbuf_data(upbuf)); 510 sbuf_delete(upbuf); 511 } 512 513 /* Print number of users logged in to system */ 514 xo_emit(" {:users/%d} {N:user%s}", nusers, nusers == 1 ? "" : "s"); 515 516 /* 517 * Print 1, 5, and 15 minute load averages. 518 */ 519 if (getloadavg(avenrun, sizeof(avenrun) / sizeof(avenrun[0])) == -1) 520 xo_emit(", no load average information available\n"); 521 else { 522 static const char *format[] = { 523 " {:load-average-1/%.2f}", 524 " {:load-average-5/%.2f}", 525 " {:load-average-15/%.2f}", 526 }; 527 xo_emit(", load averages:"); 528 for (i = 0; i < (int)(sizeof(avenrun) / sizeof(avenrun[0])); i++) { 529 if (use_comma && i > 0) 530 xo_emit(","); 531 xo_emit(format[i], avenrun[i]); 532 } 533 xo_emit("\n"); 534 } 535 } 536 537 static struct stat * 538 ttystat(char *line) 539 { 540 static struct stat sb; 541 char ttybuf[MAXPATHLEN]; 542 543 (void)snprintf(ttybuf, sizeof(ttybuf), "%s%s", _PATH_DEV, line); 544 if (stat(ttybuf, &sb) == 0 && S_ISCHR(sb.st_mode)) { 545 return (&sb); 546 } else 547 return (NULL); 548 } 549 550 static void 551 usage(int wcmd) 552 { 553 if (wcmd) 554 xo_error("usage: w [-dhin] [-M core] [-N system] [user ...]\n"); 555 else 556 xo_error("usage: uptime\n"); 557 xo_finish(); 558 exit(1); 559 } 560