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 * 3. 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 * @(#) Copyright (c) 1980, 1991, 1993, 1994 The Regents of the University of California. All rights reserved. 30 * @(#)w.c 8.4 (Berkeley) 4/16/94 31 * $FreeBSD: src/usr.bin/w/w.c,v 1.38.2.6 2002/03/12 19:51:51 phantom Exp $ 32 */ 33 34 /* 35 * w - print system status (who and what) 36 * 37 * This program is similar to the systat command on Tenex/Tops 10/20 38 * 39 */ 40 #include <sys/user.h> 41 #include <sys/param.h> 42 #include <sys/time.h> 43 #include <sys/stat.h> 44 #include <sys/sysctl.h> 45 #include <sys/ioctl.h> 46 #include <sys/socket.h> 47 #include <sys/tty.h> 48 49 #include <machine/cpu.h> 50 #include <netinet/in.h> 51 #include <arpa/inet.h> 52 53 #include <ctype.h> 54 #include <err.h> 55 #include <errno.h> 56 #include <fcntl.h> 57 #include <kvm.h> 58 #include <limits.h> 59 #include <langinfo.h> 60 #include <locale.h> 61 #include <netdb.h> 62 #include <nlist.h> 63 #include <paths.h> 64 #include <stdio.h> 65 #include <stdlib.h> 66 #include <string.h> 67 #include <unistd.h> 68 #ifdef SUPPORT_UTMP 69 #include <utmp.h> 70 #endif 71 #ifdef SUPPORT_UTMPX 72 #include <utmpx.h> 73 #endif 74 #include <vis.h> 75 76 #include <arpa/nameser.h> 77 #include <resolv.h> 78 79 #include "extern.h" 80 81 struct timeval boottime; 82 #ifdef SUPPORT_UTMP 83 struct utmp utmp; 84 #endif 85 struct winsize ws; 86 kvm_t *kd; 87 time_t now; /* the current time of day */ 88 time_t then; 89 time_t uptime; /* time of last reboot & elapsed time since */ 90 int ttywidth; /* width of tty */ 91 int argwidth; /* width of tty */ 92 int header = 1; /* true if -h flag: don't print heading */ 93 int nflag; /* true if -n flag: don't convert addrs */ 94 int dflag; /* true if -d flag: output debug info */ 95 int sortidle; /* sort by idle time */ 96 int use_ampm; /* use AM/PM time */ 97 int use_comma; /* use comma as floats separator */ 98 char **sel_users; /* login array of particular users selected */ 99 char domain[MAXHOSTNAMELEN]; 100 int maxname = 8, maxline = 3, maxhost = 16; 101 102 /* 103 * One of these per active utmp entry. 104 */ 105 struct entry { 106 struct entry *next; 107 char name[UTX_USERSIZE + 1]; 108 char line[UTX_LINESIZE + 1]; 109 char host[UTX_HOSTSIZE + 1]; 110 char type[2]; 111 struct timeval tv; 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 pid_t pid; /* pid or ~0 if not known */ 118 } *ep, *ehead = NULL, **nextp = &ehead; 119 120 #define debugproc(p) *((struct kinfo_proc **)&(p)->kp_spare[0]) 121 122 static void pr_header(time_t *, int); 123 #if defined(SUPPORT_UTMP) || defined(SUPPORT_UTMPX) 124 static struct stat *ttystat(char *, int); 125 static void process(struct entry *); 126 #endif 127 static void usage(int); 128 static int this_is_uptime(const char *s); 129 130 char *fmt_argv(char **, char *, int); /* ../../bin/ps/fmt.c */ 131 132 int 133 main(int argc, char **argv) 134 { 135 struct kinfo_proc *kp; 136 struct kinfo_proc *dkp; 137 struct hostent *hp; 138 in_addr_t l; 139 int ch, i, nentries, nusers, wcmd, longidle, dropgid; 140 char *memf, *nlistf, *p, *x; 141 #ifdef SUPPORT_UTMP 142 struct utmp *ut; 143 #endif 144 #ifdef SUPPORT_UTMPX 145 struct utmpx *utx; 146 #endif 147 char buf[MAXHOSTNAMELEN], errbuf[_POSIX2_LINE_MAX]; 148 149 (void)setlocale(LC_ALL, ""); 150 use_ampm = (*nl_langinfo(T_FMT_AMPM) != '\0'); 151 use_comma = (*nl_langinfo(RADIXCHAR) != ','); 152 153 /* Are we w(1) or uptime(1)? */ 154 if (this_is_uptime(argv[0]) == 0) { 155 wcmd = 0; 156 p = ""; 157 } else { 158 wcmd = 1; 159 p = "dhiflM:N:nsuw"; 160 } 161 162 dropgid = 0; 163 memf = nlistf = _PATH_DEVNULL; 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 dropgid = 1; 179 break; 180 case 'N': 181 nlistf = optarg; 182 dropgid = 1; 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 /* 203 * Discard setgid privileges if not the running kernel so that bad 204 * guys can't print interesting stuff from kernel memory. 205 */ 206 if (dropgid) 207 setgid(getgid()); 208 209 if ((kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf)) == NULL) 210 errx(1, "%s", errbuf); 211 212 (void)time(&now); 213 #ifdef SUPPORT_UTMPX 214 setutxent(); 215 #endif 216 #ifdef SUPPORT_UTMP 217 setutent(); 218 #endif 219 220 if (*argv) 221 sel_users = argv; 222 223 nusers = 0; 224 #ifdef SUPPORT_UTMPX 225 while ((utx = getutxent()) != NULL) { 226 if (utx->ut_type != USER_PROCESS) 227 continue; 228 ++nusers; 229 230 if (sel_users) { 231 int usermatch; 232 char **user; 233 234 usermatch = 0; 235 for (user = sel_users; !usermatch && *user; user++) 236 if (!strncmp(utx->ut_name, *user, UTX_USERSIZE)) 237 usermatch = 1; 238 if (!usermatch) 239 continue; 240 } 241 242 if ((ep = calloc(1, sizeof(struct entry))) == NULL) 243 err(1, NULL); 244 (void)memcpy(ep->name, utx->ut_name, sizeof(utx->ut_name)); 245 (void)memcpy(ep->line, utx->ut_line, sizeof(utx->ut_line)); 246 (void)memcpy(ep->host, utx->ut_host, sizeof(utx->ut_host)); 247 ep->name[sizeof(utx->ut_name)] = '\0'; 248 ep->line[sizeof(utx->ut_line)] = '\0'; 249 ep->host[sizeof(utx->ut_host)] = '\0'; 250 #if 1 251 /* XXX: Actually we don't support the utx->ut_ss stuff yet */ 252 if (!nflag || getnameinfo((struct sockaddr *)&utx->ut_ss, 253 utx->ut_ss.ss_len, ep->host, sizeof(ep->host), NULL, 0, 254 NI_NUMERICHOST) != 0) { 255 (void)memcpy(ep->host, utx->ut_host, 256 sizeof(utx->ut_host)); 257 ep->host[sizeof(utx->ut_host)] = '\0'; 258 } 259 #endif 260 ep->type[0] = 'x'; 261 ep->tv = utx->ut_tv; 262 ep->pid = utx->ut_pid; 263 264 *nextp = ep; 265 nextp = &(ep->next); 266 if (wcmd != 0) 267 process(ep); 268 } 269 #endif 270 271 #ifdef SUPPORT_UTMP 272 while ((ut = getutent()) != NULL) { 273 if (ut->ut_name[0] == '\0') 274 continue; 275 ++nusers; 276 if (sel_users) { 277 int usermatch; 278 char **user; 279 280 usermatch = 0; 281 for (user = sel_users; !usermatch && *user; user++) 282 if (!strncmp(ut->ut_name, *user, UT_NAMESIZE)) 283 usermatch = 1; 284 if (!usermatch) 285 continue; 286 } 287 288 /* Don't process entries that we have utmpx for */ 289 for (ep = ehead; ep != NULL; ep = ep->next) { 290 if (strncmp(ep->line, ut->ut_line, 291 sizeof(ut->ut_line)) == 0) 292 break; 293 } 294 if (ep != NULL) { 295 --nusers; /* Duplicate entry */ 296 continue; 297 } 298 299 if ((ep = calloc(1, sizeof(struct entry))) == NULL) 300 err(1, NULL); 301 (void)memcpy(ep->name, ut->ut_name, sizeof(ut->ut_name)); 302 (void)memcpy(ep->line, ut->ut_line, sizeof(ut->ut_line)); 303 (void)memcpy(ep->host, ut->ut_host, sizeof(ut->ut_host)); 304 ep->name[sizeof(ut->ut_name)] = '\0'; 305 ep->line[sizeof(ut->ut_line)] = '\0'; 306 ep->host[sizeof(ut->ut_host)] = '\0'; 307 ep->tv.tv_sec = ut->ut_time; 308 309 *nextp = ep; 310 nextp = &(ep->next); 311 if (wcmd != 0) 312 process(ep); 313 } 314 #endif 315 316 #ifdef SUPPORT_UTMPX 317 endutxent(); 318 #endif 319 #ifdef SUPPORT_UTMP 320 endutent(); 321 #endif 322 323 if (header || wcmd == 0) { 324 pr_header(&now, nusers); 325 if (wcmd == 0) { 326 (void)kvm_close(kd); 327 exit(0); 328 } 329 330 #define HEADER_USER "USER" 331 #define HEADER_TTY "TTY" 332 #define HEADER_FROM "FROM" 333 #define HEADER_LOGIN_IDLE "LOGIN@ IDLE " 334 #define HEADER_WHAT "WHAT\n" 335 #define WUSED (maxname + maxline + maxhost + \ 336 sizeof(HEADER_LOGIN_IDLE) + 3) /* header width incl. spaces */ 337 (void)printf("%-*.*s %-*.*s %-*.*s %s", 338 maxname, maxname, HEADER_USER, 339 maxline, maxline, HEADER_TTY, 340 maxhost, maxhost, HEADER_FROM, 341 HEADER_LOGIN_IDLE HEADER_WHAT); 342 } 343 344 if ((kp = kvm_getprocs(kd, KERN_PROC_ALL, 0, &nentries)) == NULL) 345 err(1, "%s", kvm_geterr(kd)); 346 for (i = 0; i < nentries; i++, kp++) { 347 if (kp->kp_stat == SIDL || kp->kp_stat == SZOMB) 348 continue; 349 for (ep = ehead; ep != NULL; ep = ep->next) { 350 if (ep->tdev == kp->kp_tdev) { 351 /* 352 * proc is associated with this terminal 353 */ 354 if (ep->kp == NULL && kp->kp_pgid == kp->kp_tpgid) { 355 /* 356 * Proc is 'most interesting' 357 */ 358 if (proc_compare(ep->kp, kp)) 359 ep->kp = kp; 360 } 361 /* 362 * Proc debug option info; add to debug 363 * list using kinfo_proc kp_eproc.e_spare 364 * as next pointer; ptr to ptr avoids the 365 * ptr = long assumption. 366 */ 367 dkp = ep->dkp; 368 ep->dkp = kp; 369 debugproc(kp) = dkp; 370 } 371 if (ep->pid != 0 && ep->pid == kp->kp_pid) { 372 ep->kp = kp; 373 break; 374 } 375 } 376 } 377 if ((ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) == -1 && 378 ioctl(STDERR_FILENO, TIOCGWINSZ, &ws) == -1 && 379 ioctl(STDIN_FILENO, TIOCGWINSZ, &ws) == -1) || ws.ws_col == 0) 380 ttywidth = 79; 381 else 382 ttywidth = ws.ws_col - 1; 383 argwidth = ttywidth - WUSED; 384 if (argwidth < 4) 385 argwidth = 8; 386 for (ep = ehead; ep != NULL; ep = ep->next) { 387 if (ep->kp == NULL) { 388 ep->args = "-"; 389 continue; 390 } 391 ep->args = fmt_argv(kvm_getargv(kd, ep->kp, argwidth), 392 ep->kp->kp_comm, MAXCOMLEN); 393 if (ep->args == NULL) 394 err(1, NULL); 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 #if defined(SUPPORT_UTMP) && defined(SUPPORT_UTMPX) 414 else if (ehead != NULL) { 415 struct entry *from = ehead, *save; 416 417 ehead = NULL; 418 while (from != NULL) { 419 for (nextp = &ehead; 420 (*nextp) && strcmp(from->line, (*nextp)->line) > 0; 421 nextp = &(*nextp)->next) 422 continue; 423 save = from; 424 from = from->next; 425 save->next = *nextp; 426 *nextp = save; 427 } 428 } 429 #endif 430 431 if (!nflag) { 432 if (gethostname(domain, sizeof(domain)) < 0 || 433 (p = strchr(domain, '.')) == NULL) 434 domain[0] = '\0'; 435 else { 436 domain[sizeof(domain) - 1] = '\0'; 437 memmove(domain, p, strlen(p) + 1); 438 } 439 } 440 441 for (ep = ehead; ep != NULL; ep = ep->next) { 442 char host_buf[UTX_HOSTSIZE + 1]; 443 444 host_buf[UTX_HOSTSIZE] = '\0'; 445 strncpy(host_buf, ep->host, maxhost); 446 p = *host_buf ? host_buf : "-"; 447 if ((x = strchr(p, ':')) != NULL) 448 *x++ = '\0'; 449 if (!nflag && isdigit(*p) && 450 (l = inet_addr(p)) != INADDR_NONE && 451 (hp = gethostbyaddr(&l, sizeof(l), AF_INET))) { 452 if (domain[0] != '\0') { 453 p = hp->h_name; 454 p += strlen(hp->h_name); 455 p -= strlen(domain); 456 if (p > hp->h_name && 457 strcasecmp(p, domain) == 0) 458 *p = '\0'; 459 } 460 p = hp->h_name; 461 } 462 if (nflag && *p && strcmp(p, "-") && 463 inet_addr(p) == INADDR_NONE) { 464 hp = gethostbyname(p); 465 466 if (hp != NULL) { 467 struct in_addr in; 468 469 memmove(&in, hp->h_addr, sizeof(in)); 470 p = inet_ntoa(in); 471 } 472 } 473 if (x) { 474 (void)snprintf(buf, sizeof(buf), "%s:%s", p, x); 475 p = buf; 476 } 477 if (dflag) { 478 for (dkp = ep->dkp; dkp != NULL; dkp = debugproc(dkp)) { 479 char *ptr; 480 481 ptr = fmt_argv(kvm_getargv(kd, dkp, argwidth), 482 dkp->kp_comm, MAXCOMLEN); 483 if (ptr == NULL) 484 ptr = "-"; 485 (void)printf("\t\t%-9d %s\n", 486 dkp->kp_pid, ptr); 487 } 488 } 489 (void)printf("%-*.*s %-*.*s %-*.*s ", 490 maxname, maxname, ep->name, 491 maxline, maxline, 492 strncmp(ep->line, "tty", 3) && 493 strncmp(ep->line, "cua", 3) ? 494 ep->line : ep->line + 3, 495 maxhost, maxhost, *p ? p : "-"); 496 then = (time_t)ep->tv.tv_sec; 497 pr_attime(&then, &now); 498 longidle = pr_idle(ep->idle); 499 (void)printf("%.*s\n", argwidth - longidle, ep->args); 500 } 501 (void)kvm_close(kd); 502 exit(0); 503 } 504 505 static void 506 pr_header(time_t *nowp, int nusers) 507 { 508 double avenrun[3]; 509 time_t uptime; 510 int days, hrs, i, mins, secs; 511 int mib[2]; 512 size_t size; 513 char buf[256]; 514 515 /* 516 * Print time of day. (use "AM"/"PM" for all locales) 517 */ 518 (void)strftime_l(buf, sizeof(buf) - 1, 519 use_ampm ? "%l:%M%p" : "%k:%M", 520 localtime(nowp), NULL); 521 buf[sizeof(buf) - 1] = '\0'; 522 (void)printf("%s ", buf); 523 524 /* 525 * Print how long system has been up. 526 * (Found by looking at "boottime" from the kernel) 527 */ 528 mib[0] = CTL_KERN; 529 mib[1] = KERN_BOOTTIME; 530 size = sizeof(boottime); 531 if (sysctl(mib, 2, &boottime, &size, NULL, 0) != -1 && 532 boottime.tv_sec != 0) { 533 uptime = now - boottime.tv_sec; 534 if (uptime > 60) 535 uptime += 30; 536 days = uptime / 86400; 537 uptime %= 86400; 538 hrs = uptime / 3600; 539 uptime %= 3600; 540 mins = uptime / 60; 541 secs = uptime % 60; 542 (void)printf(" up"); 543 if (days > 0) 544 (void)printf(" %d day%s,", days, days > 1 ? "s" : ""); 545 if (hrs > 0 && mins > 0) 546 (void)printf(" %2d:%02d,", hrs, mins); 547 else if (hrs > 0) 548 (void)printf(" %d hr%s,", hrs, hrs > 1 ? "s" : ""); 549 else if (mins > 0) 550 (void)printf(" %d min%s,", mins, mins > 1 ? "s" : ""); 551 else 552 (void)printf(" %d sec%s,", secs, secs > 1 ? "s" : ""); 553 } 554 555 /* Print number of users logged in on system */ 556 (void)printf(" %d user%s", nusers, nusers == 1 ? "" : "s"); 557 558 /* 559 * Print 1, 5, and 15 minute load averages. 560 */ 561 if (getloadavg(avenrun, NELEM(avenrun)) == -1) 562 (void)printf(", no load average information available\n"); 563 else { 564 (void)printf(", load averages:"); 565 for (i = 0; i < (int)NELEM(avenrun); i++) { 566 if (use_comma && i > 0) 567 (void)printf(","); 568 (void)printf(" %.2f", avenrun[i]); 569 } 570 (void)printf("\n"); 571 } 572 } 573 574 static struct stat * 575 ttystat(char *line, int sz) 576 { 577 static struct stat sb; 578 char ttybuf[MAXPATHLEN]; 579 580 (void)snprintf(ttybuf, sizeof(ttybuf), "%s%.*s", _PATH_DEV, sz, line); 581 if (stat(ttybuf, &sb)) { 582 warn("%s", ttybuf); 583 return (NULL); 584 } 585 return (&sb); 586 } 587 588 static void 589 usage(int wcmd) 590 { 591 if (wcmd) 592 (void)fprintf(stderr, 593 "usage: w [-dhin] [-M core] [-N system] [user ...]\n"); 594 else 595 (void)fprintf(stderr, "usage: uptime\n"); 596 exit(1); 597 } 598 599 static int 600 this_is_uptime(const char *s) 601 { 602 const char *u; 603 604 if ((u = strrchr(s, '/')) != NULL) 605 ++u; 606 else 607 u = s; 608 if (strcmp(u, "uptime") == 0) 609 return (0); 610 return (-1); 611 } 612 613 #if defined(SUPPORT_UTMP) || defined(SUPPORT_UTMPX) 614 static void 615 process(struct entry *ep) 616 { 617 struct stat *stp; 618 time_t touched; 619 int max; 620 621 if ((max = strlen(ep->name)) > maxname) 622 maxname = max; 623 if ((max = strlen(ep->line)) > maxline) 624 maxline = max; 625 if ((max = strlen(ep->host)) > maxhost) 626 maxhost = max; 627 628 ep->tdev = 0; 629 ep->idle = (time_t)-1; 630 631 if (!(stp = ttystat(ep->line, maxline))) 632 return; /* corrupted record */ 633 634 ep->tdev = stp->st_rdev; 635 #ifdef CPU_CONSDEV 636 /* 637 * If this is the console device, attempt to ascertain 638 * the true console device dev_t. 639 */ 640 if (ep->tdev == 0) { 641 int mib[2]; 642 size_t size; 643 644 mib[0] = CTL_MACHDEP; 645 mib[1] = CPU_CONSDEV; 646 size = sizeof(dev_t); 647 (void)sysctl(mib, 2, &ep->tdev, &size, NULL, 0); 648 } 649 #endif 650 651 touched = stp->st_atime; 652 if (touched < ep->tv.tv_sec) { 653 /* tty untouched since before login */ 654 touched = ep->tv.tv_sec; 655 } 656 if ((ep->idle = now - touched) < 0) 657 ep->idle = 0; 658 } 659 #endif 660