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. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#) Copyright (c) 1980, 1991, 1993, 1994 The Regents of the University of California. All rights reserved. 34 * @(#)w.c 8.4 (Berkeley) 4/16/94 35 * $FreeBSD: src/usr.bin/w/w.c,v 1.38.2.6 2002/03/12 19:51:51 phantom Exp $ 36 * $DragonFly: src/usr.bin/w/w.c,v 1.10 2007/02/18 16:15:24 corecode Exp $ 37 */ 38 39 /* 40 * w - print system status (who and what) 41 * 42 * This program is similar to the systat command on Tenex/Tops 10/20 43 * 44 */ 45 #include <sys/user.h> 46 #include <sys/param.h> 47 #include <sys/time.h> 48 #include <sys/stat.h> 49 #include <sys/sysctl.h> 50 #include <sys/ioctl.h> 51 #include <sys/socket.h> 52 #include <sys/tty.h> 53 54 #include <machine/cpu.h> 55 #include <netinet/in.h> 56 #include <arpa/inet.h> 57 58 #include <ctype.h> 59 #include <err.h> 60 #include <errno.h> 61 #include <fcntl.h> 62 #include <kvm.h> 63 #include <limits.h> 64 #include <langinfo.h> 65 #include <locale.h> 66 #include <netdb.h> 67 #include <nlist.h> 68 #include <paths.h> 69 #include <stdio.h> 70 #include <stdlib.h> 71 #include <string.h> 72 #include <unistd.h> 73 #ifdef SUPPORT_UTMP 74 #include <utmp.h> 75 #endif 76 #ifdef SUPPORT_UTMPX 77 #include <utmpx.h> 78 #endif 79 #include <vis.h> 80 81 #include <arpa/nameser.h> 82 #include <resolv.h> 83 84 #include "extern.h" 85 86 struct timeval boottime; 87 #ifdef SUPPORT_UTMP 88 struct utmp utmp; 89 #endif 90 struct winsize ws; 91 kvm_t *kd; 92 time_t now; /* the current time of day */ 93 time_t then; 94 time_t uptime; /* time of last reboot & elapsed time since */ 95 int ttywidth; /* width of tty */ 96 int argwidth; /* width of tty */ 97 int header = 1; /* true if -h flag: don't print heading */ 98 int nflag; /* true if -n flag: don't convert addrs */ 99 int dflag; /* true if -d flag: output debug info */ 100 int sortidle; /* sort by idle time */ 101 int use_ampm; /* use AM/PM time */ 102 int use_comma; /* use comma as floats separator */ 103 char **sel_users; /* login array of particular users selected */ 104 char domain[MAXHOSTNAMELEN]; 105 int maxname = 8, maxline = 3, maxhost = 16; 106 107 /* 108 * One of these per active utmp entry. 109 */ 110 struct entry { 111 struct entry *next; 112 char name[UTX_USERSIZE + 1]; 113 char line[UTX_LINESIZE + 1]; 114 char host[UTX_HOSTSIZE + 1]; 115 char type[2]; 116 struct timeval tv; 117 dev_t tdev; /* dev_t of terminal */ 118 time_t idle; /* idle time of terminal in seconds */ 119 struct kinfo_proc *kp; /* `most interesting' proc */ 120 char *args; /* arg list of interesting process */ 121 struct kinfo_proc *dkp; /* debug option proc list */ 122 pid_t pid; /* pid or ~0 if not known */ 123 } *ep, *ehead = NULL, **nextp = &ehead; 124 125 #define debugproc(p) *((struct kinfo_proc **)&(p)->kp_spare[0]) 126 127 static void pr_header(time_t *, int); 128 #if defined(SUPPORT_UTMP) || defined(SUPPORT_UTMPX) 129 static struct stat *ttystat(char *, int); 130 static void process(struct entry *); 131 #endif 132 static void usage(int); 133 static int this_is_uptime(const char *s); 134 135 char *fmt_argv(char **, char *, int); /* ../../bin/ps/fmt.c */ 136 137 int 138 main(int argc, char **argv) 139 { 140 struct kinfo_proc *kp; 141 struct kinfo_proc *dkp; 142 struct hostent *hp; 143 in_addr_t l; 144 int ch, i, nentries, nusers, wcmd, longidle, dropgid; 145 char *memf, *nlistf, *p, *x; 146 #ifdef SUPPORT_UTMP 147 struct utmp *ut; 148 #endif 149 #ifdef SUPPORT_UTMPX 150 struct utmpx *utx; 151 #endif 152 char buf[MAXHOSTNAMELEN], errbuf[_POSIX2_LINE_MAX]; 153 154 (void)setlocale(LC_ALL, ""); 155 use_ampm = (*nl_langinfo(T_FMT_AMPM) != '\0'); 156 use_comma = (*nl_langinfo(RADIXCHAR) != ','); 157 158 /* Are we w(1) or uptime(1)? */ 159 if (this_is_uptime(argv[0]) == 0) { 160 wcmd = 0; 161 p = ""; 162 } else { 163 wcmd = 1; 164 p = "dhiflM:N:nsuw"; 165 } 166 167 dropgid = 0; 168 memf = nlistf = _PATH_DEVNULL; 169 while ((ch = getopt(argc, argv, p)) != -1) 170 switch (ch) { 171 case 'd': 172 dflag = 1; 173 break; 174 case 'h': 175 header = 0; 176 break; 177 case 'i': 178 sortidle = 1; 179 break; 180 case 'M': 181 header = 0; 182 memf = optarg; 183 dropgid = 1; 184 break; 185 case 'N': 186 nlistf = optarg; 187 dropgid = 1; 188 break; 189 case 'n': 190 nflag = 1; 191 break; 192 case 'f': case 'l': case 's': case 'u': case 'w': 193 warnx("[-flsuw] no longer supported"); 194 /* FALLTHROUGH */ 195 case '?': 196 default: 197 usage(wcmd); 198 } 199 argc -= optind; 200 argv += optind; 201 202 if (!(_res.options & RES_INIT)) 203 res_init(); 204 _res.retrans = 2; /* resolver timeout to 2 seconds per try */ 205 _res.retry = 1; /* only try once.. */ 206 207 /* 208 * Discard setgid privileges if not the running kernel so that bad 209 * guys can't print interesting stuff from kernel memory. 210 */ 211 if (dropgid) 212 setgid(getgid()); 213 214 if ((kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf)) == NULL) 215 errx(1, "%s", errbuf); 216 217 (void)time(&now); 218 #ifdef SUPPORT_UTMPX 219 setutxent(); 220 #endif 221 #ifdef SUPPORT_UTMP 222 setutent(); 223 #endif 224 225 if (*argv) 226 sel_users = argv; 227 228 nusers = 0; 229 #ifdef SUPPORT_UTMPX 230 while ((utx = getutxent()) != NULL) { 231 if (utx->ut_type != USER_PROCESS) 232 continue; 233 ++nusers; 234 235 if (sel_users) { 236 int usermatch; 237 char **user; 238 239 usermatch = 0; 240 for (user = sel_users; !usermatch && *user; user++) 241 if (!strncmp(utx->ut_name, *user, UTX_USERSIZE)) 242 usermatch = 1; 243 if (!usermatch) 244 continue; 245 } 246 247 if ((ep = calloc(1, sizeof(struct entry))) == NULL) 248 err(1, NULL); 249 (void)memcpy(ep->name, utx->ut_name, sizeof(utx->ut_name)); 250 (void)memcpy(ep->line, utx->ut_line, sizeof(utx->ut_line)); 251 (void)memcpy(ep->host, utx->ut_host, sizeof(utx->ut_host)); 252 ep->name[sizeof(utx->ut_name)] = '\0'; 253 ep->line[sizeof(utx->ut_line)] = '\0'; 254 ep->host[sizeof(utx->ut_host)] = '\0'; 255 #if 1 256 /* XXX: Actually we don't support the utx->ut_ss stuff yet */ 257 if (!nflag || getnameinfo((struct sockaddr *)&utx->ut_ss, 258 utx->ut_ss.ss_len, ep->host, sizeof(ep->host), NULL, 0, 259 NI_NUMERICHOST) != 0) { 260 (void)memcpy(ep->host, utx->ut_host, 261 sizeof(utx->ut_host)); 262 ep->host[sizeof(utx->ut_host)] = '\0'; 263 } 264 #endif 265 ep->type[0] = 'x'; 266 ep->tv = utx->ut_tv; 267 ep->pid = utx->ut_pid; 268 269 *nextp = ep; 270 nextp = &(ep->next); 271 if (wcmd != 0) 272 process(ep); 273 } 274 #endif 275 276 #ifdef SUPPORT_UTMP 277 while ((ut = getutent()) != NULL) { 278 if (ut->ut_name[0] == '\0') 279 continue; 280 ++nusers; 281 if (sel_users) { 282 int usermatch; 283 char **user; 284 285 usermatch = 0; 286 for (user = sel_users; !usermatch && *user; user++) 287 if (!strncmp(ut->ut_name, *user, UT_NAMESIZE)) 288 usermatch = 1; 289 if (!usermatch) 290 continue; 291 } 292 293 /* Don't process entries that we have utmpx for */ 294 for (ep = ehead; ep != NULL; ep = ep->next) { 295 if (strncmp(ep->line, ut->ut_line, 296 sizeof(ut->ut_line)) == 0) 297 break; 298 } 299 if (ep != NULL) { 300 --nusers; /* Duplicate entry */ 301 continue; 302 } 303 304 if ((ep = calloc(1, sizeof(struct entry))) == NULL) 305 err(1, NULL); 306 (void)memcpy(ep->name, ut->ut_name, sizeof(ut->ut_name)); 307 (void)memcpy(ep->line, ut->ut_line, sizeof(ut->ut_line)); 308 (void)memcpy(ep->host, ut->ut_host, sizeof(ut->ut_host)); 309 ep->name[sizeof(ut->ut_name)] = '\0'; 310 ep->line[sizeof(ut->ut_line)] = '\0'; 311 ep->host[sizeof(ut->ut_host)] = '\0'; 312 ep->tv.tv_sec = ut->ut_time; 313 314 *nextp = ep; 315 nextp = &(ep->next); 316 if (wcmd != 0) 317 process(ep); 318 } 319 #endif 320 321 #ifdef SUPPORT_UTMPX 322 endutxent(); 323 #endif 324 #ifdef SUPPORT_UTMP 325 endutent(); 326 #endif 327 328 if (header || wcmd == 0) { 329 pr_header(&now, nusers); 330 if (wcmd == 0) { 331 (void)kvm_close(kd); 332 exit(0); 333 } 334 335 #define HEADER_USER "USER" 336 #define HEADER_TTY "TTY" 337 #define HEADER_FROM "FROM" 338 #define HEADER_LOGIN_IDLE "LOGIN@ IDLE " 339 #define HEADER_WHAT "WHAT\n" 340 #define WUSED (maxname + maxline + maxhost + \ 341 sizeof(HEADER_LOGIN_IDLE) + 3) /* header width incl. spaces */ 342 (void)printf("%-*.*s %-*.*s %-*.*s %s", 343 maxname, maxname, HEADER_USER, 344 maxline, maxline, HEADER_TTY, 345 maxhost, maxhost, HEADER_FROM, 346 HEADER_LOGIN_IDLE HEADER_WHAT); 347 } 348 349 if ((kp = kvm_getprocs(kd, KERN_PROC_ALL, 0, &nentries)) == NULL) 350 err(1, "%s", kvm_geterr(kd)); 351 for (i = 0; i < nentries; i++, kp++) { 352 if (kp->kp_stat == SIDL || kp->kp_stat == SZOMB) 353 continue; 354 for (ep = ehead; ep != NULL; ep = ep->next) { 355 if (ep->tdev == kp->kp_tdev) { 356 /* 357 * proc is associated with this terminal 358 */ 359 if (ep->kp == NULL && kp->kp_pgid == kp->kp_tpgid) { 360 /* 361 * Proc is 'most interesting' 362 */ 363 if (proc_compare(ep->kp, kp)) 364 ep->kp = kp; 365 } 366 /* 367 * Proc debug option info; add to debug 368 * list using kinfo_proc kp_eproc.e_spare 369 * as next pointer; ptr to ptr avoids the 370 * ptr = long assumption. 371 */ 372 dkp = ep->dkp; 373 ep->dkp = kp; 374 debugproc(kp) = dkp; 375 } 376 if (ep->pid != 0 && ep->pid == kp->kp_pid) { 377 ep->kp = kp; 378 break; 379 } 380 } 381 } 382 if ((ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) == -1 && 383 ioctl(STDERR_FILENO, TIOCGWINSZ, &ws) == -1 && 384 ioctl(STDIN_FILENO, TIOCGWINSZ, &ws) == -1) || ws.ws_col == 0) 385 ttywidth = 79; 386 else 387 ttywidth = ws.ws_col - 1; 388 argwidth = ttywidth - WUSED; 389 if (argwidth < 4) 390 argwidth = 8; 391 for (ep = ehead; ep != NULL; ep = ep->next) { 392 if (ep->kp == NULL) { 393 ep->args = "-"; 394 continue; 395 } 396 ep->args = fmt_argv(kvm_getargv(kd, ep->kp, argwidth), 397 ep->kp->kp_comm, MAXCOMLEN); 398 if (ep->args == NULL) 399 err(1, NULL); 400 } 401 /* sort by idle time */ 402 if (sortidle && ehead != NULL) { 403 struct entry *from, *save; 404 405 from = ehead; 406 ehead = NULL; 407 while (from != NULL) { 408 for (nextp = &ehead; 409 (*nextp) && from->idle >= (*nextp)->idle; 410 nextp = &(*nextp)->next) 411 continue; 412 save = from; 413 from = from->next; 414 save->next = *nextp; 415 *nextp = save; 416 } 417 } 418 #if defined(SUPPORT_UTMP) && defined(SUPPORT_UTMPX) 419 else if (ehead != NULL) { 420 struct entry *from = ehead, *save; 421 422 ehead = NULL; 423 while (from != NULL) { 424 for (nextp = &ehead; 425 (*nextp) && strcmp(from->line, (*nextp)->line) > 0; 426 nextp = &(*nextp)->next) 427 continue; 428 save = from; 429 from = from->next; 430 save->next = *nextp; 431 *nextp = save; 432 } 433 } 434 #endif 435 436 if (!nflag) { 437 if (gethostname(domain, sizeof(domain)) < 0 || 438 (p = strchr(domain, '.')) == NULL) 439 domain[0] = '\0'; 440 else { 441 domain[sizeof(domain) - 1] = '\0'; 442 memmove(domain, p, strlen(p) + 1); 443 } 444 } 445 446 for (ep = ehead; ep != NULL; ep = ep->next) { 447 char host_buf[UTX_HOSTSIZE + 1]; 448 449 host_buf[UTX_HOSTSIZE] = '\0'; 450 strncpy(host_buf, ep->host, maxhost); 451 p = *host_buf ? host_buf : "-"; 452 if ((x = strchr(p, ':')) != NULL) 453 *x++ = '\0'; 454 if (!nflag && isdigit(*p) && (l = inet_addr(p)) != -1 && 455 (hp = gethostbyaddr(&l, sizeof(l), AF_INET))) { 456 if (domain[0] != '\0') { 457 p = hp->h_name; 458 p += strlen(hp->h_name); 459 p -= strlen(domain); 460 if (p > hp->h_name && 461 strcasecmp(p, domain) == 0) 462 *p = '\0'; 463 } 464 p = hp->h_name; 465 } 466 if (nflag && *p && strcmp(p, "-") && 467 inet_addr(p) == INADDR_NONE) { 468 hp = gethostbyname(p); 469 470 if (hp != NULL) { 471 struct in_addr in; 472 473 memmove(&in, hp->h_addr, sizeof(in)); 474 p = inet_ntoa(in); 475 } 476 } 477 if (x) { 478 (void)snprintf(buf, sizeof(buf), "%s:%s", p, x); 479 p = buf; 480 } 481 if (dflag) { 482 for (dkp = ep->dkp; dkp != NULL; dkp = debugproc(dkp)) { 483 char *ptr; 484 485 ptr = fmt_argv(kvm_getargv(kd, dkp, argwidth), 486 dkp->kp_comm, MAXCOMLEN); 487 if (ptr == NULL) 488 ptr = "-"; 489 (void)printf("\t\t%-9d %s\n", 490 dkp->kp_pid, ptr); 491 } 492 } 493 (void)printf("%-*.*s %-*.*s %-*.*s ", 494 maxname, maxname, ep->name, 495 maxline, maxline, 496 strncmp(ep->line, "tty", 3) && 497 strncmp(ep->line, "cua", 3) ? 498 ep->line : ep->line + 3, 499 maxhost, maxhost, *p ? p : "-"); 500 then = (time_t)ep->tv.tv_sec; 501 pr_attime(&then, &now); 502 longidle = pr_idle(ep->idle); 503 (void)printf("%.*s\n", argwidth - longidle, ep->args); 504 } 505 (void)kvm_close(kd); 506 exit(0); 507 } 508 509 static void 510 pr_header(time_t *nowp, int nusers) 511 { 512 double avenrun[3]; 513 time_t uptime; 514 int days, hrs, i, mins, secs; 515 int mib[2]; 516 size_t size; 517 char buf[256]; 518 519 /* 520 * Print time of day. 521 */ 522 (void)strftime(buf, sizeof(buf) - 1, 523 use_ampm ? "%l:%M%p" : "%k:%M", localtime(nowp)); 524 buf[sizeof(buf) - 1] = '\0'; 525 (void)printf("%s ", buf); 526 527 /* 528 * Print how long system has been up. 529 * (Found by looking at "boottime" from the kernel) 530 */ 531 mib[0] = CTL_KERN; 532 mib[1] = KERN_BOOTTIME; 533 size = sizeof(boottime); 534 if (sysctl(mib, 2, &boottime, &size, NULL, 0) != -1 && 535 boottime.tv_sec != 0) { 536 uptime = now - boottime.tv_sec; 537 if (uptime > 60) 538 uptime += 30; 539 days = uptime / 86400; 540 uptime %= 86400; 541 hrs = uptime / 3600; 542 uptime %= 3600; 543 mins = uptime / 60; 544 secs = uptime % 60; 545 (void)printf(" up"); 546 if (days > 0) 547 (void)printf(" %d day%s,", days, days > 1 ? "s" : ""); 548 if (hrs > 0 && mins > 0) 549 (void)printf(" %2d:%02d,", hrs, mins); 550 else if (hrs > 0) 551 (void)printf(" %d hr%s,", hrs, hrs > 1 ? "s" : ""); 552 else if (mins > 0) 553 (void)printf(" %d min%s,", mins, mins > 1 ? "s" : ""); 554 else 555 (void)printf(" %d sec%s,", secs, secs > 1 ? "s" : ""); 556 } 557 558 /* Print number of users logged in on system */ 559 (void)printf(" %d user%s", nusers, nusers == 1 ? "" : "s"); 560 561 /* 562 * Print 1, 5, and 15 minute load averages. 563 */ 564 if (getloadavg(avenrun, sizeof(avenrun) / sizeof(avenrun[0])) == -1) 565 (void)printf(", no load average information available\n"); 566 else { 567 (void)printf(", load averages:"); 568 for (i = 0; i < (sizeof(avenrun) / sizeof(avenrun[0])); i++) { 569 if (use_comma && i > 0) 570 (void)printf(","); 571 (void)printf(" %.2f", avenrun[i]); 572 } 573 (void)printf("\n"); 574 } 575 } 576 577 static struct stat * 578 ttystat(char *line, int sz) 579 { 580 static struct stat sb; 581 char ttybuf[MAXPATHLEN]; 582 583 (void)snprintf(ttybuf, sizeof(ttybuf), "%s%.*s", _PATH_DEV, sz, line); 584 if (stat(ttybuf, &sb)) { 585 warn("%s", ttybuf); 586 return (NULL); 587 } 588 return (&sb); 589 } 590 591 static void 592 usage(int wcmd) 593 { 594 if (wcmd) 595 (void)fprintf(stderr, 596 "usage: w [-dhin] [-M core] [-N system] [user ...]\n"); 597 else 598 (void)fprintf(stderr, "usage: uptime\n"); 599 exit(1); 600 } 601 602 static int 603 this_is_uptime(const char *s) 604 { 605 const char *u; 606 607 if ((u = strrchr(s, '/')) != NULL) 608 ++u; 609 else 610 u = s; 611 if (strcmp(u, "uptime") == 0) 612 return (0); 613 return (-1); 614 } 615 616 #if defined(SUPPORT_UTMP) || defined(SUPPORT_UTMPX) 617 static void 618 process(struct entry *ep) 619 { 620 struct stat *stp; 621 time_t touched; 622 int max; 623 624 if ((max = strlen(ep->name)) > maxname) 625 maxname = max; 626 if ((max = strlen(ep->line)) > maxline) 627 maxline = max; 628 if ((max = strlen(ep->host)) > maxhost) 629 maxhost = max; 630 631 ep->tdev = 0; 632 ep->idle = (time_t)-1; 633 634 if (!(stp = ttystat(ep->line, maxline))) 635 return; /* corrupted record */ 636 637 ep->tdev = stp->st_rdev; 638 #ifdef CPU_CONSDEV 639 /* 640 * If this is the console device, attempt to ascertain 641 * the true console device dev_t. 642 */ 643 if (ep->tdev == 0) { 644 int mib[2]; 645 size_t size; 646 647 mib[0] = CTL_MACHDEP; 648 mib[1] = CPU_CONSDEV; 649 size = sizeof(dev_t); 650 (void)sysctl(mib, 2, &ep->tdev, &size, NULL, 0); 651 } 652 #endif 653 654 touched = stp->st_atime; 655 if (touched < ep->tv.tv_sec) { 656 /* tty untouched since before login */ 657 touched = ep->tv.tv_sec; 658 } 659 if ((ep->idle = now - touched) < 0) 660 ep->idle = 0; 661 } 662 #endif 663