w.c revision 1.79
1 /* $NetBSD: w.c,v 1.79 2014/02/27 00:49:46 joerg 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 1.79 2014/02/27 00:49:46 joerg 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/ioctl.h> 59 #include <sys/socket.h> 60 61 #include <netinet/in.h> 62 #include <arpa/inet.h> 63 64 #include <ctype.h> 65 #include <err.h> 66 #include <errno.h> 67 #include <fcntl.h> 68 #include <kvm.h> 69 #include <limits.h> 70 #include <netdb.h> 71 #include <nlist.h> 72 #include <paths.h> 73 #include <stdio.h> 74 #include <stdlib.h> 75 #include <string.h> 76 #include <time.h> 77 #include <tzfile.h> 78 #include <unistd.h> 79 #ifdef SUPPORT_UTMP 80 #include <utmp.h> 81 #endif 82 #ifdef SUPPORT_UTMPX 83 #include <utmpx.h> 84 #endif 85 #include <vis.h> 86 87 #include "extern.h" 88 89 struct timeval boottime; 90 struct winsize ws; 91 kvm_t *kd; 92 time_t now; /* the current time of day */ 93 int ttywidth; /* width of tty */ 94 int argwidth; /* width of tty left to print process args */ 95 int header = 1; /* true if -h flag: don't print heading */ 96 int nflag; /* true if -n flag: don't convert addrs */ 97 int wflag; /* true if -w flag: wide printout */ 98 int sortidle; /* sort bu idle time */ 99 char *sel_user; /* login of particular user selected */ 100 char domain[MAXHOSTNAMELEN + 1]; 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_proc2 *tp; /* `most interesting' tty proc */ 116 struct kinfo_proc2 *pp; /* pid proc */ 117 pid_t pid; /* pid or ~0 if not known */ 118 } *ehead = NULL, **nextp = &ehead; 119 120 static void pr_args(struct kinfo_proc2 *); 121 static void pr_header(time_t *, int); 122 static int proc_compare_wrapper(const struct kinfo_proc2 *, 123 const struct kinfo_proc2 *); 124 #if defined(SUPPORT_UTMP) || defined(SUPPORT_UTMPX) 125 static int ttystat(const char *, struct stat *); 126 static void process(struct entry *); 127 #endif 128 static void fixhost(struct entry *ep); 129 __dead static void usage(int); 130 131 int 132 main(int argc, char **argv) 133 { 134 struct kinfo_proc2 *kp; 135 struct entry *ep; 136 int ch, i, nentries, nusers, wcmd, curtain, use_sysctl; 137 char *memf, *nlistf, *usrnp; 138 const char *options; 139 time_t then; 140 size_t len; 141 #ifdef SUPPORT_UTMP 142 struct utmp *ut; 143 #endif 144 #ifdef SUPPORT_UTMPX 145 struct utmpx *utx; 146 #endif 147 const char *progname; 148 char errbuf[_POSIX2_LINE_MAX]; 149 150 setprogname(argv[0]); 151 152 /* Are we w(1) or uptime(1)? */ 153 progname = getprogname(); 154 if (*progname == '-') 155 progname++; 156 if (*progname == 'u') { 157 wcmd = 0; 158 options = ""; 159 } else { 160 wcmd = 1; 161 options = "hiM:N:nw"; 162 } 163 164 memf = nlistf = NULL; 165 while ((ch = getopt(argc, argv, options)) != -1) 166 switch (ch) { 167 case 'h': 168 header = 0; 169 break; 170 case 'i': 171 sortidle = 1; 172 break; 173 case 'M': 174 header = 0; 175 memf = optarg; 176 break; 177 case 'N': 178 nlistf = optarg; 179 break; 180 case 'n': 181 nflag = 1; 182 break; 183 case 'w': 184 wflag = 1; 185 break; 186 case '?': 187 default: 188 usage(wcmd); 189 } 190 argc -= optind; 191 argv += optind; 192 193 use_sysctl = (memf == NULL && nlistf == NULL); 194 195 if ((kd = kvm_openfiles(nlistf, memf, NULL, 196 memf == NULL ? KVM_NO_FILES : O_RDONLY, errbuf)) == NULL) 197 errx(1, "%s", errbuf); 198 199 (void)time(&now); 200 201 if (use_sysctl) { 202 len = sizeof(curtain); 203 if (sysctlbyname("security.curtain", &curtain, &len, 204 NULL, 0) == -1) 205 curtain = 0; 206 } 207 208 #ifdef SUPPORT_UTMPX 209 setutxent(); 210 #endif 211 #ifdef SUPPORT_UTMP 212 setutent(); 213 #endif 214 215 if (*argv) 216 sel_user = *argv; 217 218 nusers = 0; 219 #ifdef SUPPORT_UTMPX 220 while ((utx = getutxent()) != NULL) { 221 if (utx->ut_type != USER_PROCESS) 222 continue; 223 ++nusers; 224 if (sel_user && 225 strncmp(utx->ut_name, sel_user, sizeof(utx->ut_name)) != 0) 226 continue; 227 if ((ep = calloc(1, sizeof(struct entry))) == NULL) 228 err(1, NULL); 229 (void)memcpy(ep->name, utx->ut_name, sizeof(utx->ut_name)); 230 (void)memcpy(ep->line, utx->ut_line, sizeof(utx->ut_line)); 231 ep->name[sizeof(utx->ut_name)] = '\0'; 232 ep->line[sizeof(utx->ut_line)] = '\0'; 233 if (!nflag || getnameinfo((struct sockaddr *)&utx->ut_ss, 234 utx->ut_ss.ss_len, ep->host, sizeof(ep->host), NULL, 0, 235 NI_NUMERICHOST) != 0) { 236 (void)memcpy(ep->host, utx->ut_host, 237 sizeof(utx->ut_host)); 238 ep->host[sizeof(utx->ut_host)] = '\0'; 239 } 240 fixhost(ep); 241 ep->type[0] = 'x'; 242 ep->tv = utx->ut_tv; 243 ep->pid = utx->ut_pid; 244 *nextp = ep; 245 nextp = &(ep->next); 246 if (wcmd != 0) 247 process(ep); 248 } 249 #endif 250 251 #ifdef SUPPORT_UTMP 252 while ((ut = getutent()) != NULL) { 253 if (ut->ut_name[0] == '\0') 254 continue; 255 256 if (sel_user && 257 strncmp(ut->ut_name, sel_user, sizeof(ut->ut_name)) != 0) 258 continue; 259 260 /* Don't process entries that we have utmpx for */ 261 for (ep = ehead; ep != NULL; ep = ep->next) { 262 if (strncmp(ep->line, ut->ut_line, 263 sizeof(ut->ut_line)) == 0) 264 break; 265 } 266 if (ep != NULL) 267 continue; 268 269 ++nusers; 270 if ((ep = calloc(1, sizeof(struct entry))) == NULL) 271 err(1, NULL); 272 (void)memcpy(ep->name, ut->ut_name, sizeof(ut->ut_name)); 273 (void)memcpy(ep->line, ut->ut_line, sizeof(ut->ut_line)); 274 (void)memcpy(ep->host, ut->ut_host, sizeof(ut->ut_host)); 275 ep->name[sizeof(ut->ut_name)] = '\0'; 276 ep->line[sizeof(ut->ut_line)] = '\0'; 277 ep->host[sizeof(ut->ut_host)] = '\0'; 278 fixhost(ep); 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 for (ep = ehead; ep != NULL; ep = ep->next) { 308 if (ep->tdev != 0 && ep->tdev == kp->p_tdev && 309 kp->p__pgid == kp->p_tpgid) { 310 /* 311 * Proc is in foreground of this 312 * terminal 313 */ 314 if (proc_compare_wrapper(ep->tp, kp)) 315 ep->tp = kp; 316 break; 317 } 318 if (ep->pid != 0 && ep->pid == kp->p_pid) { 319 ep->pp = kp; 320 break; 321 } 322 } 323 } 324 325 if ((ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) == -1 && 326 ioctl(STDERR_FILENO, TIOCGWINSZ, &ws) == -1 && 327 ioctl(STDIN_FILENO, TIOCGWINSZ, &ws) == -1) || ws.ws_col == 0) 328 ttywidth = 79; 329 else 330 ttywidth = ws.ws_col - 1; 331 332 if (!wflag && maxhost > (ttywidth / 3)) 333 maxhost = ttywidth / 3; 334 335 argwidth = printf("%-*s TTY %-*s %*s IDLE WHAT\n", 336 maxname, "USER", maxhost, "FROM", 337 7 /* "dddhhXm" */, "LOGIN@"); 338 argwidth -= sizeof("WHAT\n") - 1 /* NUL */; 339 argwidth = ttywidth - argwidth; 340 if (argwidth < 4) 341 argwidth = 8; 342 if (wflag) 343 argwidth = -1; 344 345 /* sort by idle time */ 346 if (sortidle && ehead != NULL) { 347 struct entry *from = ehead, *save; 348 349 ehead = NULL; 350 while (from != NULL) { 351 for (nextp = &ehead; 352 (*nextp) && from->idle >= (*nextp)->idle; 353 nextp = &(*nextp)->next) 354 continue; 355 save = from; 356 from = from->next; 357 save->next = *nextp; 358 *nextp = save; 359 } 360 } 361 #if defined(SUPPORT_UTMP) && defined(SUPPORT_UTMPX) 362 else if (ehead != NULL) { 363 struct entry *from = ehead, *save; 364 365 ehead = NULL; 366 while (from != NULL) { 367 for (nextp = &ehead; 368 (*nextp) && strcmp(from->line, (*nextp)->line) > 0; 369 nextp = &(*nextp)->next) 370 continue; 371 save = from; 372 from = from->next; 373 save->next = *nextp; 374 *nextp = save; 375 } 376 } 377 #endif 378 379 if (!nflag) { 380 int rv; 381 char *p; 382 383 rv = gethostname(domain, sizeof(domain)); 384 domain[sizeof(domain) - 1] = '\0'; 385 if (rv < 0 || (p = strchr(domain, '.')) == 0) 386 domain[0] = '\0'; 387 else 388 memmove(domain, p, strlen(p) + 1); 389 } 390 391 for (ep = ehead; ep != NULL; ep = ep->next) { 392 if (ep->tp != NULL) 393 kp = ep->tp; 394 else if (ep->pp != NULL) 395 kp = ep->pp; 396 else if (ep->pid != 0) { 397 if (curtain) 398 kp = NULL; 399 else { 400 warnx("Stale utmp%s entry: %s %s %s", 401 ep->type, ep->name, ep->line, ep->host); 402 continue; 403 } 404 } 405 usrnp = (kp == NULL) ? ep->name : kp->p_login; 406 (void)printf("%-*s %-7.7s %-*.*s ", 407 maxname, usrnp, ep->line, 408 maxhost, maxhost, ep->host); 409 then = (time_t)ep->tv.tv_sec; 410 pr_attime(&then, &now); 411 pr_idle(ep->idle); 412 pr_args(kp); 413 (void)printf("\n"); 414 } 415 exit(0); 416 } 417 418 static void 419 pr_args(struct kinfo_proc2 *kp) 420 { 421 char **argv; 422 int left; 423 424 if (kp == 0) 425 goto nothing; 426 left = argwidth; 427 argv = kvm_getargv2(kd, kp, (argwidth < 0) ? 0 : argwidth); 428 if (argv == 0) { 429 fmt_putc('(', &left); 430 fmt_puts((char *)kp->p_comm, &left); 431 fmt_putc(')', &left); 432 return; 433 } 434 while (*argv) { 435 fmt_puts(*argv, &left); 436 argv++; 437 fmt_putc(' ', &left); 438 } 439 return; 440 nothing: 441 putchar('-'); 442 } 443 444 static void 445 pr_header(time_t *nowp, int nusers) 446 { 447 double avenrun[3]; 448 time_t uptime; 449 int days, hrs, mins; 450 int mib[2]; 451 size_t size, i; 452 char buf[256]; 453 454 /* 455 * Print time of day. 456 * 457 * SCCS forces the string manipulation below, as it replaces 458 * %, M, and % in a character string with the file name. 459 */ 460 (void)strftime(buf, sizeof(buf), "%l:%" "M%p", localtime(nowp)); 461 buf[sizeof(buf) - 1] = '\0'; 462 (void)printf("%s ", buf); 463 464 /* 465 * Print how long system has been up. 466 * (Found by looking getting "boottime" from the kernel) 467 */ 468 mib[0] = CTL_KERN; 469 mib[1] = KERN_BOOTTIME; 470 size = sizeof(boottime); 471 if (sysctl(mib, 2, &boottime, &size, NULL, 0) != -1 && 472 boottime.tv_sec != 0) { 473 uptime = now - boottime.tv_sec; 474 uptime += 30; 475 if (uptime > SECSPERMIN) { 476 days = uptime / SECSPERDAY; 477 uptime %= SECSPERDAY; 478 hrs = uptime / SECSPERHOUR; 479 uptime %= SECSPERHOUR; 480 mins = uptime / SECSPERMIN; 481 (void)printf(" up"); 482 if (days > 0) 483 (void)printf(" %d day%s,", days, 484 days > 1 ? "s" : ""); 485 if (hrs > 0 && mins > 0) 486 (void)printf(" %2d:%02d,", hrs, mins); 487 else { 488 if (hrs > 0) 489 (void)printf(" %d hr%s,", 490 hrs, hrs > 1 ? "s" : ""); 491 if (mins > 0) 492 (void)printf(" %d min%s,", 493 mins, mins > 1 ? "s" : ""); 494 } 495 } 496 } 497 498 /* Print number of users logged in to system */ 499 (void)printf(" %d user%s", nusers, nusers != 1 ? "s" : ""); 500 501 /* 502 * Print 1, 5, and 15 minute load averages. 503 */ 504 if (getloadavg(avenrun, sizeof(avenrun) / sizeof(avenrun[0])) == -1) 505 (void)printf(", no load average information available\n"); 506 else { 507 (void)printf(", load averages:"); 508 for (i = 0; i < (sizeof(avenrun) / sizeof(avenrun[0])); i++) { 509 if (i > 0) 510 (void)printf(","); 511 (void)printf(" %.2f", avenrun[i]); 512 } 513 (void)printf("\n"); 514 } 515 } 516 517 #if defined(SUPPORT_UTMP) || defined(SUPPORT_UTMPX) 518 static int 519 ttystat(const char *line, struct stat *st) 520 { 521 char ttybuf[MAXPATHLEN]; 522 523 (void)snprintf(ttybuf, sizeof(ttybuf), "%s%s", _PATH_DEV, line); 524 return stat(ttybuf, st); 525 } 526 527 static void 528 process(struct entry *ep) 529 { 530 struct stat st; 531 time_t touched; 532 int max; 533 534 if ((max = strlen(ep->name)) > maxname) 535 maxname = max; 536 if ((max = strlen(ep->line)) > maxline) 537 maxline = max; 538 if ((max = strlen(ep->host)) > maxhost) 539 maxhost = max; 540 541 ep->tdev = 0; 542 ep->idle = (time_t)-1; 543 544 #ifdef SUPPORT_UTMP 545 /* 546 * Hack to recognize and correctly parse 547 * ut entry made by ftpd. The "tty" used 548 * by ftpd is not a real tty, just identifier in 549 * form ftpPID. Pid parsed from the "tty name" 550 * is used later to match corresponding process. 551 * NB: This is only used for utmp entries. For utmpx, 552 * we already have the pid. 553 */ 554 if (ep->pid == 0 && strncmp(ep->line, "ftp", 3) == 0) { 555 ep->pid = strtol(ep->line + 3, NULL, 10); 556 return; 557 } 558 #endif 559 if (ttystat(ep->line, &st) == -1) 560 return; 561 562 ep->tdev = st.st_rdev; 563 /* 564 * If this is the console device, attempt to ascertain 565 * the true console device dev_t. 566 */ 567 if (ep->tdev == 0) { 568 int mib[2]; 569 size_t size; 570 571 mib[0] = CTL_KERN; 572 mib[1] = KERN_CONSDEV; 573 size = sizeof(dev_t); 574 (void) sysctl(mib, 2, &ep->tdev, &size, NULL, 0); 575 } 576 577 touched = st.st_atime; 578 if (touched < ep->tv.tv_sec) { 579 /* tty untouched since before login */ 580 touched = ep->tv.tv_sec; 581 } 582 if ((ep->idle = now - touched) < 0) 583 ep->idle = 0; 584 } 585 #endif 586 587 static int 588 proc_compare_wrapper(const struct kinfo_proc2 *p1, 589 const struct kinfo_proc2 *p2) 590 { 591 struct kinfo_lwp *l1, *l2; 592 int cnt; 593 594 if (p1 == NULL) 595 return 1; 596 597 l1 = kvm_getlwps(kd, p1->p_pid, 0, sizeof(*l1), &cnt); 598 if (l1 == NULL || cnt == 0) 599 return 1; 600 601 l2 = kvm_getlwps(kd, p2->p_pid, 0, sizeof(*l1), &cnt); 602 if (l2 == NULL || cnt == 0) 603 return 0; 604 605 return proc_compare(p1, l1, p2, l2); 606 } 607 608 static void 609 fixhost(struct entry *ep) 610 { 611 char host_buf[sizeof(ep->host)]; 612 char *p, *x; 613 struct hostent *hp; 614 struct in_addr l; 615 616 strlcpy(host_buf, *ep->host ? ep->host : "-", sizeof(host_buf)); 617 p = host_buf; 618 619 /* 620 * XXX: Historical behavior, ':' in hostname means X display number, 621 * IPv6 not handled. 622 */ 623 for (x = p; x < &host_buf[sizeof(host_buf)]; x++) 624 if (*x == '\0' || *x == ':') 625 break; 626 if (x == p + sizeof(host_buf) || *x != ':') 627 x = NULL; 628 else 629 *x++ = '\0'; 630 631 if (!nflag && inet_aton(p, &l) && 632 (hp = gethostbyaddr((char *)&l, sizeof(l), AF_INET))) { 633 if (domain[0] != '\0') { 634 p = hp->h_name; 635 p += strlen(hp->h_name); 636 p -= strlen(domain); 637 if (p > hp->h_name && 638 strcasecmp(p, domain) == 0) 639 *p = '\0'; 640 } 641 p = hp->h_name; 642 } 643 644 if (x) 645 (void)snprintf(ep->host, sizeof(ep->host), "%s:%s", p, x); 646 else 647 648 strlcpy(ep->host, p, sizeof(ep->host)); 649 } 650 651 static void 652 usage(int wcmd) 653 { 654 655 if (wcmd) 656 (void)fprintf(stderr, 657 "Usage: %s [-hinw] [-M core] [-N system] [user]\n", 658 getprogname()); 659 else 660 (void)fprintf(stderr, "Usage: %s\n", getprogname()); 661 exit(1); 662 } 663
Indexes created Thu Sep 25 06:09:39 GMT 2025