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