1 /* $NetBSD: w.c,v 1.74 2009/04/14 07:37:31 lukem Exp $ */ 2 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 * 3. 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 #ifndef lint 34 __COPYRIGHT("@(#) Copyright (c) 1980, 1991, 1993, 1994\ 35 The Regents of the University of California. All rights reserved."); 36 #endif /* not lint */ 37 38 #ifndef lint 39 #if 0 40 static char sccsid[] = "@(#)w.c 8.6 (Berkeley) 6/30/94"; 41 #else 42 __RCSID("$NetBSD: w.c,v 1.74 2009/04/14 07:37:31 lukem Exp $"); 43 #endif 44 #endif /* not lint */ 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/types.h> 54 #include <sys/time.h> 55 #include <sys/stat.h> 56 #include <sys/sysctl.h> 57 #include <sys/proc.h> 58 #include <sys/user.h> 59 #include <sys/ioctl.h> 60 #include <sys/socket.h> 61 62 #include <netinet/in.h> 63 #include <arpa/inet.h> 64 65 #include <ctype.h> 66 #include <err.h> 67 #include <errno.h> 68 #include <fcntl.h> 69 #include <kvm.h> 70 #include <limits.h> 71 #include <netdb.h> 72 #include <nlist.h> 73 #include <paths.h> 74 #include <stdio.h> 75 #include <stdlib.h> 76 #include <string.h> 77 #include <time.h> 78 #include <tzfile.h> 79 #include <unistd.h> 80 #ifdef SUPPORT_UTMP 81 #include <utmp.h> 82 #endif 83 #ifdef SUPPORT_UTMPX 84 #include <utmpx.h> 85 #endif 86 #include <vis.h> 87 88 #include "extern.h" 89 90 struct timeval boottime; 91 struct winsize ws; 92 kvm_t *kd; 93 time_t now; /* the current time of day */ 94 int ttywidth; /* width of tty */ 95 int argwidth; /* width of tty left to print process args */ 96 int header = 1; /* true if -h flag: don't print heading */ 97 int nflag; /* true if -n flag: don't convert addrs */ 98 int wflag; /* true if -w flag: wide printout */ 99 int sortidle; /* sort bu idle time */ 100 char *sel_user; /* login of particular user selected */ 101 char domain[MAXHOSTNAMELEN + 1]; 102 int maxname = 8, maxline = 3, maxhost = 16; 103 104 /* 105 * One of these per active utmp entry. 106 */ 107 struct entry { 108 struct entry *next; 109 char name[UTX_USERSIZE + 1]; 110 char line[UTX_LINESIZE + 1]; 111 char host[UTX_HOSTSIZE + 1]; 112 char type[2]; 113 struct timeval tv; 114 dev_t tdev; /* dev_t of terminal */ 115 time_t idle; /* idle time of terminal in seconds */ 116 struct kinfo_proc2 *tp; /* `most interesting' tty proc */ 117 struct kinfo_proc2 *pp; /* pid proc */ 118 pid_t pid; /* pid or ~0 if not known */ 119 } *ehead = NULL, **nextp = &ehead; 120 121 static void pr_args(struct kinfo_proc2 *); 122 static void pr_header(time_t *, int); 123 #if defined(SUPPORT_UTMP) || defined(SUPPORT_UTMPX) 124 static int ttystat(const char *, struct stat *); 125 static void process(struct entry *); 126 #endif 127 static void usage(int); 128 129 int main(int, char **); 130 131 int 132 main(int argc, char **argv) 133 { 134 struct kinfo_proc2 *kp; 135 struct hostent *hp; 136 struct in_addr l; 137 struct entry *ep; 138 int ch, i, nentries, nusers, wcmd, curtain, use_sysctl; 139 char *memf, *nlistf, *p, *x, *usrnp; 140 const char *options; 141 time_t then; 142 size_t len; 143 #ifdef SUPPORT_UTMP 144 struct utmp *ut; 145 #endif 146 #ifdef SUPPORT_UTMPX 147 struct utmpx *utx; 148 #endif 149 const char *progname; 150 char buf[MAXHOSTNAMELEN], errbuf[_POSIX2_LINE_MAX]; 151 152 setprogname(argv[0]); 153 154 /* Are we w(1) or uptime(1)? */ 155 progname = getprogname(); 156 if (*progname == '-') 157 progname++; 158 if (*progname == 'u') { 159 wcmd = 0; 160 options = ""; 161 } else { 162 wcmd = 1; 163 options = "hiM:N:nw"; 164 } 165 166 memf = nlistf = NULL; 167 while ((ch = getopt(argc, argv, options)) != -1) 168 switch (ch) { 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 'w': 186 wflag = 1; 187 break; 188 case '?': 189 default: 190 usage(wcmd); 191 } 192 argc -= optind; 193 argv += optind; 194 195 use_sysctl = (memf == NULL && nlistf == NULL); 196 197 if ((kd = kvm_openfiles(nlistf, memf, NULL, 198 memf == NULL ? KVM_NO_FILES : O_RDONLY, errbuf)) == NULL) 199 errx(1, "%s", errbuf); 200 201 (void)time(&now); 202 203 if (use_sysctl) { 204 len = sizeof(curtain); 205 if (sysctlbyname("security.curtain", &curtain, &len, 206 NULL, 0) == -1) 207 curtain = 0; 208 } 209 210 #ifdef SUPPORT_UTMPX 211 setutxent(); 212 #endif 213 #ifdef SUPPORT_UTMP 214 setutent(); 215 #endif 216 217 if (*argv) 218 sel_user = *argv; 219 220 nusers = 0; 221 #ifdef SUPPORT_UTMPX 222 while ((utx = getutxent()) != NULL) { 223 if (utx->ut_type != USER_PROCESS) 224 continue; 225 ++nusers; 226 if (sel_user && 227 strncmp(utx->ut_name, sel_user, sizeof(utx->ut_name)) != 0) 228 continue; 229 if ((ep = calloc(1, sizeof(struct entry))) == NULL) 230 err(1, NULL); 231 (void)memcpy(ep->name, utx->ut_name, sizeof(utx->ut_name)); 232 (void)memcpy(ep->line, utx->ut_line, sizeof(utx->ut_line)); 233 ep->name[sizeof(utx->ut_name)] = '\0'; 234 ep->line[sizeof(utx->ut_line)] = '\0'; 235 if (!nflag || getnameinfo((struct sockaddr *)&utx->ut_ss, 236 utx->ut_ss.ss_len, ep->host, sizeof(ep->host), NULL, 0, 237 NI_NUMERICHOST) != 0) { 238 (void)memcpy(ep->host, utx->ut_host, 239 sizeof(utx->ut_host)); 240 ep->host[sizeof(utx->ut_host)] = '\0'; 241 } 242 ep->type[0] = 'x'; 243 ep->tv = utx->ut_tv; 244 ep->pid = utx->ut_pid; 245 *nextp = ep; 246 nextp = &(ep->next); 247 if (wcmd != 0) 248 process(ep); 249 } 250 #endif 251 252 #ifdef SUPPORT_UTMP 253 while ((ut = getutent()) != NULL) { 254 if (ut->ut_name[0] == '\0') 255 continue; 256 257 if (sel_user && 258 strncmp(ut->ut_name, sel_user, sizeof(ut->ut_name)) != 0) 259 continue; 260 261 /* Don't process entries that we have utmpx for */ 262 for (ep = ehead; ep != NULL; ep = ep->next) { 263 if (strncmp(ep->line, ut->ut_line, 264 sizeof(ut->ut_line)) == 0) 265 break; 266 } 267 if (ep != NULL) 268 continue; 269 270 ++nusers; 271 if ((ep = calloc(1, sizeof(struct entry))) == NULL) 272 err(1, NULL); 273 (void)memcpy(ep->name, ut->ut_name, sizeof(ut->ut_name)); 274 (void)memcpy(ep->line, ut->ut_line, sizeof(ut->ut_line)); 275 (void)memcpy(ep->host, ut->ut_host, sizeof(ut->ut_host)); 276 ep->name[sizeof(ut->ut_name)] = '\0'; 277 ep->line[sizeof(ut->ut_line)] = '\0'; 278 ep->host[sizeof(ut->ut_host)] = '\0'; 279 ep->tv.tv_sec = ut->ut_time; 280 *nextp = ep; 281 nextp = &(ep->next); 282 if (wcmd != 0) 283 process(ep); 284 } 285 #endif 286 287 #ifdef SUPPORT_UTMPX 288 endutxent(); 289 #endif 290 #ifdef SUPPORT_UTMP 291 endutent(); 292 #endif 293 294 if (header || wcmd == 0) { 295 pr_header(&now, nusers); 296 if (wcmd == 0) 297 exit (0); 298 } 299 300 if ((kp = kvm_getproc2(kd, KERN_PROC_ALL, 0, 301 sizeof(struct kinfo_proc2), &nentries)) == NULL) 302 errx(1, "%s", kvm_geterr(kd)); 303 304 /* Include trailing space because TTY header starts one column early. */ 305 for (i = 0; i < nentries; i++, kp++) { 306 307 if (kp->p_stat == SIDL || kp->p_stat == SZOMB) 308 continue; 309 310 for (ep = ehead; ep != NULL; ep = ep->next) { 311 if (ep->tdev != 0 && ep->tdev == kp->p_tdev && 312 kp->p__pgid == kp->p_tpgid) { 313 /* 314 * Proc is in foreground of this 315 * terminal 316 */ 317 if (proc_compare(ep->tp, kp)) 318 ep->tp = kp; 319 break; 320 } 321 if (ep->pid != 0 && ep->pid == kp->p_pid) { 322 ep->pp = kp; 323 break; 324 } 325 } 326 } 327 328 if ((ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) == -1 && 329 ioctl(STDERR_FILENO, TIOCGWINSZ, &ws) == -1 && 330 ioctl(STDIN_FILENO, TIOCGWINSZ, &ws) == -1) || ws.ws_col == 0) 331 ttywidth = 79; 332 else 333 ttywidth = ws.ws_col - 1; 334 335 if (!wflag && maxhost > (ttywidth / 3)) 336 maxhost = ttywidth / 3; 337 338 argwidth = printf("%-*s TTY %-*s %*s IDLE WHAT\n", 339 maxname, "USER", maxhost, "FROM", 340 7 /* "dddhhXm" */, "LOGIN@"); 341 argwidth -= sizeof("WHAT\n") - 1 /* NUL */; 342 argwidth = ttywidth - argwidth; 343 if (argwidth < 4) 344 argwidth = 8; 345 if (wflag) 346 argwidth = -1; 347 348 /* sort by idle time */ 349 if (sortidle && ehead != NULL) { 350 struct entry *from = ehead, *save; 351 352 ehead = NULL; 353 while (from != NULL) { 354 for (nextp = &ehead; 355 (*nextp) && from->idle >= (*nextp)->idle; 356 nextp = &(*nextp)->next) 357 continue; 358 save = from; 359 from = from->next; 360 save->next = *nextp; 361 *nextp = save; 362 } 363 } 364 #if defined(SUPPORT_UTMP) && defined(SUPPORT_UTMPX) 365 else if (ehead != NULL) { 366 struct entry *from = ehead, *save; 367 368 ehead = NULL; 369 while (from != NULL) { 370 for (nextp = &ehead; 371 (*nextp) && strcmp(from->line, (*nextp)->line) > 0; 372 nextp = &(*nextp)->next) 373 continue; 374 save = from; 375 from = from->next; 376 save->next = *nextp; 377 *nextp = save; 378 } 379 } 380 #endif 381 382 if (!nflag) { 383 int rv; 384 385 rv = gethostname(domain, sizeof(domain)); 386 domain[sizeof(domain) - 1] = '\0'; 387 if (rv < 0 || (p = strchr(domain, '.')) == 0) 388 domain[0] = '\0'; 389 else 390 memmove(domain, p, strlen(p) + 1); 391 } 392 393 for (ep = ehead; ep != NULL; ep = ep->next) { 394 char host_buf[MAXHOSTNAMELEN + 1]; 395 396 strlcpy(host_buf, *ep->host ? ep->host : "-", sizeof(host_buf)); 397 p = host_buf; 398 399 for (x = p; x < p + MAXHOSTNAMELEN; x++) 400 if (*x == '\0' || *x == ':') 401 break; 402 if (x == p + MAXHOSTNAMELEN || *x != ':') 403 x = NULL; 404 else 405 *x++ = '\0'; 406 407 if (!nflag && inet_aton(p, &l) && 408 (hp = gethostbyaddr((char *)&l, sizeof(l), AF_INET))) { 409 if (domain[0] != '\0') { 410 p = hp->h_name; 411 p += strlen(hp->h_name); 412 p -= strlen(domain); 413 if (p > hp->h_name && 414 strcasecmp(p, domain) == 0) 415 *p = '\0'; 416 } 417 p = hp->h_name; 418 } 419 if (x) { 420 (void)snprintf(buf, sizeof(buf), "%s:%s", p, x); 421 p = buf; 422 } 423 424 if (ep->tp != NULL) 425 kp = ep->tp; 426 else if (ep->pp != NULL) 427 kp = ep->pp; 428 else if (ep->pid != 0) { 429 if (curtain) 430 kp = NULL; 431 else { 432 warnx("Stale utmp%s entry: %s %s %s", 433 ep->type, ep->name, ep->line, ep->host); 434 continue; 435 } 436 } 437 usrnp = (kp == NULL) ? ep->name : kp->p_login; 438 (void)printf("%-*s %-7.7s %-*.*s ", 439 maxname, usrnp, ep->line, 440 maxhost, maxhost, *p ? p : "-"); 441 then = (time_t)ep->tv.tv_sec; 442 pr_attime(&then, &now); 443 pr_idle(ep->idle); 444 pr_args(kp); 445 (void)printf("\n"); 446 } 447 exit(0); 448 } 449 450 static void 451 pr_args(struct kinfo_proc2 *kp) 452 { 453 char **argv; 454 int left; 455 456 if (kp == 0) 457 goto nothing; 458 left = argwidth; 459 argv = kvm_getargv2(kd, kp, (argwidth < 0) ? 0 : argwidth); 460 if (argv == 0) { 461 if (kp->p_comm == 0) { 462 goto nothing; 463 } else { 464 fmt_putc('(', &left); 465 fmt_puts((char *)kp->p_comm, &left); 466 fmt_putc(')', &left); 467 return; 468 } 469 } 470 while (*argv) { 471 fmt_puts(*argv, &left); 472 argv++; 473 fmt_putc(' ', &left); 474 } 475 return; 476 nothing: 477 putchar('-'); 478 } 479 480 static void 481 pr_header(time_t *nowp, int nusers) 482 { 483 double avenrun[3]; 484 time_t uptime; 485 int days, hrs, mins; 486 int mib[2]; 487 size_t size, i; 488 char buf[256]; 489 490 /* 491 * Print time of day. 492 * 493 * SCCS forces the string manipulation below, as it replaces 494 * %, M, and % in a character string with the file name. 495 */ 496 (void)strftime(buf, sizeof(buf), "%l:%" "M%p", localtime(nowp)); 497 buf[sizeof(buf) - 1] = '\0'; 498 (void)printf("%s ", buf); 499 500 /* 501 * Print how long system has been up. 502 * (Found by looking getting "boottime" from the kernel) 503 */ 504 mib[0] = CTL_KERN; 505 mib[1] = KERN_BOOTTIME; 506 size = sizeof(boottime); 507 if (sysctl(mib, 2, &boottime, &size, NULL, 0) != -1 && 508 boottime.tv_sec != 0) { 509 uptime = now - boottime.tv_sec; 510 uptime += 30; 511 if (uptime > SECSPERMIN) { 512 days = uptime / SECSPERDAY; 513 uptime %= SECSPERDAY; 514 hrs = uptime / SECSPERHOUR; 515 uptime %= SECSPERHOUR; 516 mins = uptime / SECSPERMIN; 517 (void)printf(" up"); 518 if (days > 0) 519 (void)printf(" %d day%s,", days, 520 days > 1 ? "s" : ""); 521 if (hrs > 0 && mins > 0) 522 (void)printf(" %2d:%02d,", hrs, mins); 523 else { 524 if (hrs > 0) 525 (void)printf(" %d hr%s,", 526 hrs, hrs > 1 ? "s" : ""); 527 if (mins > 0) 528 (void)printf(" %d min%s,", 529 mins, mins > 1 ? "s" : ""); 530 } 531 } 532 } 533 534 /* Print number of users logged in to system */ 535 (void)printf(" %d user%s", nusers, nusers != 1 ? "s" : ""); 536 537 /* 538 * Print 1, 5, and 15 minute load averages. 539 */ 540 if (getloadavg(avenrun, sizeof(avenrun) / sizeof(avenrun[0])) == -1) 541 (void)printf(", no load average information available\n"); 542 else { 543 (void)printf(", load averages:"); 544 for (i = 0; i < (sizeof(avenrun) / sizeof(avenrun[0])); i++) { 545 if (i > 0) 546 (void)printf(","); 547 (void)printf(" %.2f", avenrun[i]); 548 } 549 (void)printf("\n"); 550 } 551 } 552 553 #if defined(SUPPORT_UTMP) || defined(SUPPORT_UTMPX) 554 static int 555 ttystat(const char *line, struct stat *st) 556 { 557 char ttybuf[MAXPATHLEN]; 558 559 (void)snprintf(ttybuf, sizeof(ttybuf), "%s%s", _PATH_DEV, line); 560 return stat(ttybuf, st); 561 } 562 563 static void 564 process(struct entry *ep) 565 { 566 struct stat st; 567 time_t touched; 568 int max; 569 570 if ((max = strlen(ep->name)) > maxname) 571 maxname = max; 572 if ((max = strlen(ep->line)) > maxline) 573 maxline = max; 574 if ((max = strlen(ep->host)) > maxhost) 575 maxhost = max; 576 577 ep->tdev = 0; 578 ep->idle = (time_t)-1; 579 580 #ifdef SUPPORT_UTMP 581 /* 582 * Hack to recognize and correctly parse 583 * ut entry made by ftpd. The "tty" used 584 * by ftpd is not a real tty, just identifier in 585 * form ftpPID. Pid parsed from the "tty name" 586 * is used later to match corresponding process. 587 * NB: This is only used for utmp entries. For utmpx, 588 * we already have the pid. 589 */ 590 if (ep->pid == 0 && strncmp(ep->line, "ftp", 3) == 0) { 591 ep->pid = strtol(ep->line + 3, NULL, 10); 592 return; 593 } 594 #endif 595 if (ttystat(ep->line, &st) == -1) 596 return; 597 598 ep->tdev = st.st_rdev; 599 /* 600 * If this is the console device, attempt to ascertain 601 * the true console device dev_t. 602 */ 603 if (ep->tdev == 0) { 604 int mib[2]; 605 size_t size; 606 607 mib[0] = CTL_KERN; 608 mib[1] = KERN_CONSDEV; 609 size = sizeof(dev_t); 610 (void) sysctl(mib, 2, &ep->tdev, &size, NULL, 0); 611 } 612 613 touched = st.st_atime; 614 if (touched < ep->tv.tv_sec) { 615 /* tty untouched since before login */ 616 touched = ep->tv.tv_sec; 617 } 618 if ((ep->idle = now - touched) < 0) 619 ep->idle = 0; 620 } 621 #endif 622 623 static void 624 usage(int wcmd) 625 { 626 627 if (wcmd) 628 (void)fprintf(stderr, 629 "Usage: %s [-hinw] [-M core] [-N system] [user]\n", 630 getprogname()); 631 else 632 (void)fprintf(stderr, "Usage: %s\n", getprogname()); 633 exit(1); 634 } 635