w.c revision 330897
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 * 4. 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#include <sys/cdefs.h> 33 34__FBSDID("$FreeBSD: stable/11/usr.bin/w/w.c 330897 2018-03-14 03:19:51Z eadler $"); 35 36#ifndef lint 37static const char copyright[] = 38"@(#) Copyright (c) 1980, 1991, 1993, 1994\n\ 39 The Regents of the University of California. All rights reserved.\n"; 40#endif 41 42#ifndef lint 43static const char sccsid[] = "@(#)w.c 8.4 (Berkeley) 4/16/94"; 44#endif 45 46/* 47 * w - print system status (who and what) 48 * 49 * This program is similar to the systat command on Tenex/Tops 10/20 50 * 51 */ 52#include <sys/param.h> 53#include <sys/time.h> 54#include <sys/stat.h> 55#include <sys/sysctl.h> 56#include <sys/proc.h> 57#include <sys/user.h> 58#include <sys/ioctl.h> 59#include <sys/sbuf.h> 60#include <sys/socket.h> 61#include <sys/tty.h> 62#include <sys/types.h> 63 64#include <machine/cpu.h> 65#include <netinet/in.h> 66#include <arpa/inet.h> 67#include <arpa/nameser.h> 68 69#include <ctype.h> 70#include <err.h> 71#include <errno.h> 72#include <fcntl.h> 73#include <kvm.h> 74#include <langinfo.h> 75#include <libgen.h> 76#include <libutil.h> 77#include <limits.h> 78#include <locale.h> 79#include <netdb.h> 80#include <nlist.h> 81#include <paths.h> 82#include <resolv.h> 83#include <stdio.h> 84#include <stdlib.h> 85#include <string.h> 86#include <timeconv.h> 87#include <unistd.h> 88#include <utmpx.h> 89#include <vis.h> 90#include <libxo/xo.h> 91 92#include "extern.h" 93 94static struct utmpx *utmp; 95static struct winsize ws; 96static kvm_t *kd; 97static time_t now; /* the current time of day */ 98static int ttywidth; /* width of tty */ 99static int argwidth; /* width of tty */ 100static int header = 1; /* true if -h flag: don't print heading */ 101static int nflag; /* true if -n flag: don't convert addrs */ 102static int dflag; /* true if -d flag: output debug info */ 103static int sortidle; /* sort by idle time */ 104int use_ampm; /* use AM/PM time */ 105static int use_comma; /* use comma as floats separator */ 106static char **sel_users; /* login array of particular users selected */ 107 108/* 109 * One of these per active utmp entry. 110 */ 111static struct entry { 112 struct entry *next; 113 struct utmpx utmp; 114 dev_t tdev; /* dev_t of terminal */ 115 time_t idle; /* idle time of terminal in seconds */ 116 struct kinfo_proc *kp; /* `most interesting' proc */ 117 char *args; /* arg list of interesting process */ 118 struct kinfo_proc *dkp; /* debug option proc list */ 119} *ep, *ehead = NULL, **nextp = &ehead; 120 121#define debugproc(p) *(&((struct kinfo_proc *)p)->ki_udata) 122 123#define W_DISPUSERSIZE 10 124#define W_DISPLINESIZE 8 125#define W_DISPHOSTSIZE 40 126 127static void pr_header(time_t *, int); 128static struct stat *ttystat(char *); 129static void usage(int); 130 131char *fmt_argv(char **, char *, char *, size_t); /* ../../bin/ps/fmt.c */ 132 133int 134main(int argc, char *argv[]) 135{ 136 struct kinfo_proc *kp; 137 struct kinfo_proc *dkp; 138 struct stat *stp; 139 time_t touched; 140 int ch, i, nentries, nusers, wcmd, longidle, longattime; 141 const char *memf, *nlistf, *p, *save_p; 142 char *x_suffix; 143 char buf[MAXHOSTNAMELEN], errbuf[_POSIX2_LINE_MAX]; 144 char fn[MAXHOSTNAMELEN]; 145 char *dot; 146 147 (void)setlocale(LC_ALL, ""); 148 use_ampm = (*nl_langinfo(T_FMT_AMPM) != '\0'); 149 use_comma = (*nl_langinfo(RADIXCHAR) != ','); 150 151 argc = xo_parse_args(argc, argv); 152 if (argc < 0) 153 exit(1); 154 155 /* Are we w(1) or uptime(1)? */ 156 if (strcmp(basename(argv[0]), "uptime") == 0) { 157 wcmd = 0; 158 p = ""; 159 } else { 160 wcmd = 1; 161 p = "dhiflM:N:nsuw"; 162 } 163 164 memf = _PATH_DEVNULL; 165 nlistf = NULL; 166 while ((ch = getopt(argc, argv, p)) != -1) 167 switch (ch) { 168 case 'd': 169 dflag = 1; 170 break; 171 case 'h': 172 header = 0; 173 break; 174 case 'i': 175 sortidle = 1; 176 break; 177 case 'M': 178 header = 0; 179 memf = optarg; 180 break; 181 case 'N': 182 nlistf = optarg; 183 break; 184 case 'n': 185 nflag = 1; 186 break; 187 case 'f': case 'l': case 's': case 'u': case 'w': 188 warnx("[-flsuw] no longer supported"); 189 /* FALLTHROUGH */ 190 case '?': 191 default: 192 usage(wcmd); 193 } 194 argc -= optind; 195 argv += optind; 196 197 if (!(_res.options & RES_INIT)) 198 res_init(); 199 _res.retrans = 2; /* resolver timeout to 2 seconds per try */ 200 _res.retry = 1; /* only try once.. */ 201 202 if ((kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf)) == NULL) 203 errx(1, "%s", errbuf); 204 205 (void)time(&now); 206 207 if (*argv) 208 sel_users = argv; 209 210 setutxent(); 211 for (nusers = 0; (utmp = getutxent()) != NULL;) { 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 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 endutxent(); 255 256 xo_open_container("uptime-information"); 257 258 if (header || wcmd == 0) { 259 pr_header(&now, nusers); 260 if (wcmd == 0) { 261 xo_close_container("uptime-information"); 262 xo_finish(); 263 264 (void)kvm_close(kd); 265 exit(0); 266 } 267 268#define HEADER_USER "USER" 269#define HEADER_TTY "TTY" 270#define HEADER_FROM "FROM" 271#define HEADER_LOGIN_IDLE "LOGIN@ IDLE " 272#define HEADER_WHAT "WHAT\n" 273#define WUSED (W_DISPUSERSIZE + W_DISPLINESIZE + W_DISPHOSTSIZE + \ 274 sizeof(HEADER_LOGIN_IDLE) + 3) /* header width incl. spaces */ 275 xo_emit("{T:/%-*.*s} {T:/%-*.*s} {T:/%-*.*s} {T:/%s}", 276 W_DISPUSERSIZE, W_DISPUSERSIZE, HEADER_USER, 277 W_DISPLINESIZE, W_DISPLINESIZE, HEADER_TTY, 278 W_DISPHOSTSIZE, W_DISPHOSTSIZE, HEADER_FROM, 279 HEADER_LOGIN_IDLE HEADER_WHAT); 280 } 281 282 if ((kp = kvm_getprocs(kd, KERN_PROC_ALL, 0, &nentries)) == NULL) 283 err(1, "%s", kvm_geterr(kd)); 284 for (i = 0; i < nentries; i++, kp++) { 285 if (kp->ki_stat == SIDL || kp->ki_stat == SZOMB || 286 kp->ki_tdev == NODEV) 287 continue; 288 for (ep = ehead; ep != NULL; ep = ep->next) { 289 if (ep->tdev == kp->ki_tdev) { 290 /* 291 * proc is associated with this terminal 292 */ 293 if (ep->kp == NULL && kp->ki_pgid == kp->ki_tpgid) { 294 /* 295 * Proc is 'most interesting' 296 */ 297 if (proc_compare(ep->kp, kp)) 298 ep->kp = kp; 299 } 300 /* 301 * Proc debug option info; add to debug 302 * list using kinfo_proc ki_spare[0] 303 * as next pointer; ptr to ptr avoids the 304 * ptr = long assumption. 305 */ 306 dkp = ep->dkp; 307 ep->dkp = kp; 308 debugproc(kp) = dkp; 309 } 310 } 311 } 312 if ((ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) == -1 && 313 ioctl(STDERR_FILENO, TIOCGWINSZ, &ws) == -1 && 314 ioctl(STDIN_FILENO, TIOCGWINSZ, &ws) == -1) || ws.ws_col == 0) 315 ttywidth = 79; 316 else 317 ttywidth = ws.ws_col - 1; 318 argwidth = ttywidth - WUSED; 319 if (argwidth < 4) 320 argwidth = 8; 321 for (ep = ehead; ep != NULL; ep = ep->next) { 322 if (ep->kp == NULL) { 323 ep->args = strdup("-"); 324 continue; 325 } 326 ep->args = fmt_argv(kvm_getargv(kd, ep->kp, argwidth), 327 ep->kp->ki_comm, NULL, MAXCOMLEN); 328 if (ep->args == NULL) 329 err(1, NULL); 330 } 331 /* sort by idle time */ 332 if (sortidle && ehead != NULL) { 333 struct entry *from, *save; 334 335 from = ehead; 336 ehead = NULL; 337 while (from != NULL) { 338 for (nextp = &ehead; 339 (*nextp) && from->idle >= (*nextp)->idle; 340 nextp = &(*nextp)->next) 341 continue; 342 save = from; 343 from = from->next; 344 save->next = *nextp; 345 *nextp = save; 346 } 347 } 348 349 xo_open_container("user-table"); 350 xo_open_list("user-entry"); 351 352 for (ep = ehead; ep != NULL; ep = ep->next) { 353 struct addrinfo hints, *res; 354 struct sockaddr_storage ss; 355 struct sockaddr *sa = (struct sockaddr *)&ss; 356 struct sockaddr_in *lsin = (struct sockaddr_in *)&ss; 357 struct sockaddr_in6 *lsin6 = (struct sockaddr_in6 *)&ss; 358 time_t t; 359 int isaddr; 360 361 xo_open_instance("user-entry"); 362 363 save_p = p = *ep->utmp.ut_host ? ep->utmp.ut_host : "-"; 364 if ((x_suffix = strrchr(p, ':')) != NULL) { 365 if ((dot = strchr(x_suffix, '.')) != NULL && 366 strchr(dot+1, '.') == NULL) 367 *x_suffix++ = '\0'; 368 else 369 x_suffix = NULL; 370 } 371 372 isaddr = 0; 373 memset(&ss, '\0', sizeof(ss)); 374 if (inet_pton(AF_INET6, p, &lsin6->sin6_addr) == 1) { 375 lsin6->sin6_len = sizeof(*lsin6); 376 lsin6->sin6_family = AF_INET6; 377 isaddr = 1; 378 } else if (inet_pton(AF_INET, p, &lsin->sin_addr) == 1) { 379 lsin->sin_len = sizeof(*lsin); 380 lsin->sin_family = AF_INET; 381 isaddr = 1; 382 } 383 if (!nflag) { 384 /* Attempt to change an IP address into a name */ 385 if (isaddr && realhostname_sa(fn, sizeof(fn), sa, 386 sa->sa_len) == HOSTNAME_FOUND) 387 p = fn; 388 } else if (!isaddr) { 389 /* 390 * If a host has only one A/AAAA RR, change a 391 * name into an IP address 392 */ 393 memset(&hints, 0, sizeof(hints)); 394 hints.ai_flags = AI_PASSIVE; 395 hints.ai_family = AF_UNSPEC; 396 hints.ai_socktype = SOCK_STREAM; 397 if (getaddrinfo(p, NULL, &hints, &res) == 0) { 398 if (res->ai_next == NULL && 399 getnameinfo(res->ai_addr, res->ai_addrlen, 400 fn, sizeof(fn), NULL, 0, 401 NI_NUMERICHOST) == 0) 402 p = fn; 403 freeaddrinfo(res); 404 } 405 } 406 407 if (x_suffix) { 408 (void)snprintf(buf, sizeof(buf), "%s:%s", p, x_suffix); 409 p = buf; 410 } 411 if (dflag) { 412 xo_open_container("process-table"); 413 xo_open_list("process-entry"); 414 415 for (dkp = ep->dkp; dkp != NULL; dkp = debugproc(dkp)) { 416 const char *ptr; 417 418 ptr = fmt_argv(kvm_getargv(kd, dkp, argwidth), 419 dkp->ki_comm, NULL, MAXCOMLEN); 420 if (ptr == NULL) 421 ptr = "-"; 422 xo_open_instance("process-entry"); 423 xo_emit("\t\t{:process-id/%-9d/%d} {:command/%s}\n", 424 dkp->ki_pid, ptr); 425 xo_close_instance("process-entry"); 426 } 427 xo_close_list("process-entry"); 428 xo_close_container("process-table"); 429 } 430 xo_emit("{:user/%-*.*s/%@**@s} {:tty/%-*.*s/%@**@s} ", 431 W_DISPUSERSIZE, W_DISPUSERSIZE, ep->utmp.ut_user, 432 W_DISPLINESIZE, W_DISPLINESIZE, 433 *ep->utmp.ut_line ? 434 (strncmp(ep->utmp.ut_line, "tty", 3) && 435 strncmp(ep->utmp.ut_line, "cua", 3) ? 436 ep->utmp.ut_line : ep->utmp.ut_line + 3) : "-"); 437 438 if (save_p && save_p != p) 439 xo_attr("address", "%s", save_p); 440 xo_emit("{:from/%-*.*s/%@**@s} ", 441 W_DISPHOSTSIZE, W_DISPHOSTSIZE, *p ? p : "-"); 442 t = ep->utmp.ut_tv.tv_sec; 443 longattime = pr_attime(&t, &now); 444 longidle = pr_idle(ep->idle); 445 xo_emit("{:command/%.*s/%@*@s}\n", 446 argwidth - longidle - longattime, 447 ep->args); 448 449 xo_close_instance("user-entry"); 450 } 451 452 xo_close_list("user-entry"); 453 xo_close_container("user-table"); 454 xo_close_container("uptime-information"); 455 xo_finish(); 456 457 (void)kvm_close(kd); 458 exit(0); 459} 460 461static void 462pr_header(time_t *nowp, int nusers) 463{ 464 double avenrun[3]; 465 time_t uptime; 466 struct timespec tp; 467 int days, hrs, i, mins, secs; 468 char buf[256]; 469 struct sbuf *upbuf; 470 471 upbuf = sbuf_new_auto(); 472 /* 473 * Print time of day. 474 */ 475 if (strftime(buf, sizeof(buf), 476 use_ampm ? "%l:%M%p" : "%k:%M", localtime(nowp)) != 0) 477 xo_emit("{:time-of-day/%s} ", buf); 478 /* 479 * Print how long system has been up. 480 */ 481 if (clock_gettime(CLOCK_UPTIME, &tp) != -1) { 482 uptime = tp.tv_sec; 483 if (uptime > 60) 484 uptime += 30; 485 days = uptime / 86400; 486 uptime %= 86400; 487 hrs = uptime / 3600; 488 uptime %= 3600; 489 mins = uptime / 60; 490 secs = uptime % 60; 491 xo_emit(" up"); 492 xo_emit("{e:uptime/%lu}", (unsigned long) tp.tv_sec); 493 xo_emit("{e:days/%d}{e:hours/%d}{e:minutes/%d}{e:seconds/%d}", days, hrs, mins, secs); 494 495 if (days > 0) 496 sbuf_printf(upbuf, " %d day%s,", 497 days, days > 1 ? "s" : ""); 498 if (hrs > 0 && mins > 0) 499 sbuf_printf(upbuf, " %2d:%02d,", hrs, mins); 500 else if (hrs > 0) 501 sbuf_printf(upbuf, " %d hr%s,", 502 hrs, hrs > 1 ? "s" : ""); 503 else if (mins > 0) 504 sbuf_printf(upbuf, " %d min%s,", 505 mins, mins > 1 ? "s" : ""); 506 else 507 sbuf_printf(upbuf, " %d sec%s,", 508 secs, secs > 1 ? "s" : ""); 509 if (sbuf_finish(upbuf) != 0) 510 xo_err(1, "Could not generate output"); 511 xo_emit("{:uptime-human/%s}", sbuf_data(upbuf)); 512 sbuf_delete(upbuf); 513 } 514 515 /* Print number of users logged in to system */ 516 xo_emit(" {:users/%d} {Np:user,users}", nusers); 517 518 /* 519 * Print 1, 5, and 15 minute load averages. 520 */ 521 if (getloadavg(avenrun, nitems(avenrun)) == -1) 522 xo_emit(", no load average information available\n"); 523 else { 524 static const char *format[] = { 525 " {:load-average-1/%.2f}", 526 " {:load-average-5/%.2f}", 527 " {:load-average-15/%.2f}", 528 }; 529 xo_emit(", load averages:"); 530 for (i = 0; i < (int)(nitems(avenrun)); i++) { 531 if (use_comma && i > 0) 532 xo_emit(","); 533 xo_emit(format[i], avenrun[i]); 534 } 535 xo_emit("\n"); 536 } 537} 538 539static struct stat * 540ttystat(char *line) 541{ 542 static struct stat sb; 543 char ttybuf[MAXPATHLEN]; 544 545 (void)snprintf(ttybuf, sizeof(ttybuf), "%s%s", _PATH_DEV, line); 546 if (stat(ttybuf, &sb) == 0 && S_ISCHR(sb.st_mode)) { 547 return (&sb); 548 } else 549 return (NULL); 550} 551 552static void 553usage(int wcmd) 554{ 555 if (wcmd) 556 xo_error("usage: w [-dhin] [-M core] [-N system] [user ...]\n"); 557 else 558 xo_error("usage: uptime\n"); 559 xo_finish(); 560 exit(1); 561} 562