w.c revision 1.72
1 /* $NetBSD: w.c,v 1.72 2006/06/22 17:57:31 christos 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\n\ 35 The Regents of the University of California. All rights reserved.\n"); 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 1.72 2006/06/22 17:57:31 christos 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 time_t uptime; /* time of last reboot & elapsed time since */ 95 int ttywidth; /* width of tty */ 96 int argwidth; /* width of tty left to print process args */ 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 wflag; /* true if -w flag: wide printout */ 100 int sortidle; /* sort bu idle time */ 101 char *sel_user; /* login of particular user selected */ 102 char domain[MAXHOSTNAMELEN + 1]; 103 int maxname = 8, maxline = 3, maxhost = 16; 104 105 /* 106 * One of these per active utmp entry. 107 */ 108 struct entry { 109 struct entry *next; 110 char name[UTX_USERSIZE + 1]; 111 char line[UTX_LINESIZE + 1]; 112 char host[UTX_HOSTSIZE + 1]; 113 char type[2]; 114 struct timeval tv; 115 dev_t tdev; /* dev_t of terminal */ 116 time_t idle; /* idle time of terminal in seconds */ 117 struct kinfo_proc2 *tp; /* `most interesting' tty proc */ 118 struct kinfo_proc2 *pp; /* pid proc */ 119 pid_t pid; /* pid or ~0 if not known */ 120 } *ep, *ehead = NULL, **nextp = &ehead; 121 122 static void pr_args(struct kinfo_proc2 *); 123 static void pr_header(time_t *, int); 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 usage(int); 129 130 int main(int, char **); 131 132 int 133 main(int argc, char **argv) 134 { 135 struct kinfo_proc2 *kp; 136 struct hostent *hp; 137 struct in_addr l; 138 int ch, i, nentries, nusers, wcmd, curtain, use_sysctl; 139 char *memf, *nlistf, *p, *x, *usrnp; 140 time_t then; 141 size_t len; 142 #ifdef SUPPORT_UTMP 143 struct utmp *ut; 144 #endif 145 #ifdef SUPPORT_UTMPX 146 struct utmpx *utx; 147 #endif 148 const char *progname; 149 char buf[MAXHOSTNAMELEN], errbuf[_POSIX2_LINE_MAX]; 150 151 setprogname(argv[0]); 152 153 /* Are we w(1) or uptime(1)? */ 154 progname = getprogname(); 155 if (*progname == '-') 156 progname++; 157 if (*progname == 'u') { 158 wcmd = 0; 159 p = ""; 160 } else { 161 wcmd = 1; 162 p = "hiM:N:nw"; 163 } 164 165 memf = nlistf = NULL; 166 while ((ch = getopt(argc, argv, p)) != -1) 167 switch (ch) { 168 case 'h': 169 header = 0; 170 break; 171 case 'i': 172 sortidle = 1; 173 break; 174 case 'M': 175 header = 0; 176 memf = optarg; 177 break; 178 case 'N': 179 nlistf = optarg; 180 break; 181 case 'n': 182 nflag = 1; 183 break; 184 case 'w': 185 wflag = 1; 186 break; 187 case '?': 188 default: 189 usage(wcmd); 190 } 191 argc -= optind; 192 argv += optind; 193 194 use_sysctl = (memf == NULL && nlistf == NULL); 195 196 if ((kd = kvm_openfiles(nlistf, memf, NULL, 197 memf == NULL ? KVM_NO_FILES : O_RDONLY, errbuf)) == NULL) 198 errx(1, "%s", errbuf); 199 200 (void)time(&now); 201 202 if (use_sysctl) { 203 len = sizeof(curtain); 204 if (sysctlbyname("security.curtain", &curtain, &len, 205 NULL, 0) == -1) 206 curtain = 0; 207 } 208 209 #ifdef SUPPORT_UTMPX 210 setutxent(); 211 #endif 212 #ifdef SUPPORT_UTMP 213 setutent(); 214 #endif 215 216 if (*argv) 217 sel_user = *argv; 218 219 nusers = 0; 220 #ifdef SUPPORT_UTMPX 221 while ((utx = getutxent()) != NULL) { 222 if (utx->ut_type != USER_PROCESS) 223 continue; 224 ++nusers; 225 if (sel_user && 226 strncmp(utx->ut_name, sel_user, sizeof(utx->ut_name)) != 0) 227 continue; 228 if ((ep = calloc(1, sizeof(struct entry))) == NULL) 229 err(1, NULL); 230 (void)memcpy(ep->name, utx->ut_name, sizeof(utx->ut_name)); 231 (void)memcpy(ep->line, utx->ut_line, sizeof(utx->ut_line)); 232 ep->name[sizeof(utx->ut_name)] = '\0'; 233 ep->line[sizeof(utx->ut_line)] = '\0'; 234 if (!nflag || getnameinfo((struct sockaddr *)&utx->ut_ss, 235 utx->ut_ss.ss_len, ep->host, sizeof(ep->host), NULL, 0, 236 NI_NUMERICHOST) != 0) { 237 (void)memcpy(ep->host, utx->ut_host, 238 sizeof(utx->ut_host)); 239 ep->host[sizeof(utx->ut_host)] = '\0'; 240 } 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 ep->tv.tv_sec = ut->ut_time; 279 *nextp = ep; 280 nextp = &(ep->next); 281 if (wcmd != 0) 282 process(ep); 283 } 284 #endif 285 286 #ifdef SUPPORT_UTMPX 287 endutxent(); 288 #endif 289 #ifdef SUPPORT_UTMP 290 endutent(); 291 #endif 292 293 if (header || wcmd == 0) { 294 pr_header(&now, nusers); 295 if (wcmd == 0) 296 exit (0); 297 } 298 299 if ((kp = kvm_getproc2(kd, KERN_PROC_ALL, 0, 300 sizeof(struct kinfo_proc2), &nentries)) == NULL) 301 errx(1, "%s", kvm_geterr(kd)); 302 303 /* Include trailing space because TTY header starts one column early. */ 304 for (i = 0; i < nentries; i++, kp++) { 305 306 if (kp->p_stat == SIDL || kp->p_stat == SZOMB) 307 continue; 308 309 for (ep = ehead; ep != NULL; ep = ep->next) { 310 if (ep->tdev != 0 && ep->tdev == kp->p_tdev && 311 kp->p__pgid == kp->p_tpgid) { 312 /* 313 * Proc is in foreground of this 314 * terminal 315 */ 316 if (proc_compare(ep->tp, kp)) 317 ep->tp = kp; 318 break; 319 } 320 if (ep->pid != 0 && ep->pid == kp->p_pid) { 321 ep->pp = kp; 322 break; 323 } 324 } 325 } 326 327 if ((ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) == -1 && 328 ioctl(STDERR_FILENO, TIOCGWINSZ, &ws) == -1 && 329 ioctl(STDIN_FILENO, TIOCGWINSZ, &ws) == -1) || ws.ws_col == 0) 330 ttywidth = 79; 331 else 332 ttywidth = ws.ws_col - 1; 333 334 if (!wflag && maxhost > (ttywidth / 3)) 335 maxhost = ttywidth / 3; 336 337 argwidth = printf("%-*s TTY %-*s %*s IDLE WHAT\n", 338 maxname, "USER", maxhost, "FROM", 339 7 /* "dddhhXm" */, "LOGIN@"); 340 argwidth -= sizeof("WHAT\n") - 1 /* NUL */; 341 argwidth = ttywidth - argwidth; 342 if (argwidth < 4) 343 argwidth = 8; 344 if (wflag) 345 argwidth = -1; 346 347 /* sort by idle time */ 348 if (sortidle && ehead != NULL) { 349 struct entry *from = ehead, *save; 350 351 ehead = NULL; 352 while (from != NULL) { 353 for (nextp = &ehead; 354 (*nextp) && from->idle >= (*nextp)->idle; 355 nextp = &(*nextp)->next) 356 continue; 357 save = from; 358 from = from->next; 359 save->next = *nextp; 360 *nextp = save; 361 } 362 } 363 #if defined(SUPPORT_UTMP) && defined(SUPPORT_UTMPX) 364 else if (ehead != NULL) { 365 struct entry *from = ehead, *save; 366 367 ehead = NULL; 368 while (from != NULL) { 369 for (nextp = &ehead; 370 (*nextp) && strcmp(from->line, (*nextp)->line) > 0; 371 nextp = &(*nextp)->next) 372 continue; 373 save = from; 374 from = from->next; 375 save->next = *nextp; 376 *nextp = save; 377 } 378 } 379 #endif 380 381 if (!nflag) { 382 int rv; 383 384 rv = gethostname(domain, sizeof(domain)); 385 domain[sizeof(domain) - 1] = '\0'; 386 if (rv < 0 || (p = strchr(domain, '.')) == 0) 387 domain[0] = '\0'; 388 else 389 memmove(domain, p, strlen(p) + 1); 390 } 391 392 for (ep = ehead; ep != NULL; ep = ep->next) { 393 char host_buf[MAXHOSTNAMELEN + 1]; 394 395 strlcpy(host_buf, ep->host, sizeof(host_buf)); 396 p = *host_buf ? host_buf : "-"; 397 398 for (x = p; x < p + MAXHOSTNAMELEN; x++) 399 if (*x == '\0' || *x == ':') 400 break; 401 if (x == p + MAXHOSTNAMELEN || *x != ':') 402 x = NULL; 403 else 404 *x++ = '\0'; 405 406 if (!nflag && inet_aton(p, &l) && 407 (hp = gethostbyaddr((char *)&l, sizeof(l), AF_INET))) { 408 if (domain[0] != '\0') { 409 p = hp->h_name; 410 p += strlen(hp->h_name); 411 p -= strlen(domain); 412 if (p > hp->h_name && 413 strcasecmp(p, domain) == 0) 414 *p = '\0'; 415 } 416 p = hp->h_name; 417 } 418 if (x) { 419 (void)snprintf(buf, sizeof(buf), "%s:%s", p, x); 420 p = buf; 421 } 422 423 if (ep->tp != NULL) 424 kp = ep->tp; 425 else if (ep->pp != NULL) 426 kp = ep->pp; 427 else if (ep->pid != 0) { 428 if (curtain) 429 kp = NULL; 430 else { 431 warnx("Stale utmp%s entry: %s %s %s", 432 ep->type, ep->name, ep->line, ep->host); 433 continue; 434 } 435 } 436 usrnp = (kp == NULL) ? ep->name : kp->p_login; 437 (void)printf("%-*s %-7.7s %-*.*s ", 438 maxname, usrnp, ep->line, 439 maxhost, maxhost, *p ? p : "-"); 440 then = (time_t)ep->tv.tv_sec; 441 pr_attime(&then, &now); 442 pr_idle(ep->idle); 443 pr_args(kp); 444 (void)printf("\n"); 445 } 446 exit(0); 447 } 448 449 static void 450 pr_args(struct kinfo_proc2 *kp) 451 { 452 char **argv; 453 int left; 454 455 if (kp == 0) 456 goto nothing; 457 left = argwidth; 458 argv = kvm_getargv2(kd, kp, (argwidth < 0) ? 0 : argwidth); 459 if (argv == 0) { 460 if (kp->p_comm == 0) { 461 goto nothing; 462 } else { 463 fmt_putc('(', &left); 464 fmt_puts((char *)kp->p_comm, &left); 465 fmt_putc(')', &left); 466 return; 467 } 468 } 469 while (*argv) { 470 fmt_puts(*argv, &left); 471 argv++; 472 fmt_putc(' ', &left); 473 } 474 return; 475 nothing: 476 putchar('-'); 477 } 478 479 static void 480 pr_header(time_t *nowp, int nusers) 481 { 482 double avenrun[3]; 483 time_t uptime; 484 int days, hrs, i, mins; 485 int mib[2]; 486 size_t size; 487 char buf[256]; 488 489 /* 490 * Print time of day. 491 * 492 * SCCS forces the string manipulation below, as it replaces 493 * %, M, and % in a character string with the file name. 494 */ 495 (void)strftime(buf, sizeof(buf), "%l:%" "M%p", localtime(nowp)); 496 buf[sizeof(buf) - 1] = '\0'; 497 (void)printf("%s ", buf); 498 499 /* 500 * Print how long system has been up. 501 * (Found by looking getting "boottime" from the kernel) 502 */ 503 mib[0] = CTL_KERN; 504 mib[1] = KERN_BOOTTIME; 505 size = sizeof(boottime); 506 if (sysctl(mib, 2, &boottime, &size, NULL, 0) != -1 && 507 boottime.tv_sec != 0) { 508 uptime = now - boottime.tv_sec; 509 uptime += 30; 510 if (uptime > SECSPERMIN) { 511 days = uptime / SECSPERDAY; 512 uptime %= SECSPERDAY; 513 hrs = uptime / SECSPERHOUR; 514 uptime %= SECSPERHOUR; 515 mins = uptime / SECSPERMIN; 516 (void)printf(" up"); 517 if (days > 0) 518 (void)printf(" %d day%s,", days, 519 days > 1 ? "s" : ""); 520 if (hrs > 0 && mins > 0) 521 (void)printf(" %2d:%02d,", hrs, mins); 522 else { 523 if (hrs > 0) 524 (void)printf(" %d hr%s,", 525 hrs, hrs > 1 ? "s" : ""); 526 if (mins > 0) 527 (void)printf(" %d min%s,", 528 mins, mins > 1 ? "s" : ""); 529 } 530 } 531 } 532 533 /* Print number of users logged in to system */ 534 (void)printf(" %d user%s", nusers, nusers != 1 ? "s" : ""); 535 536 /* 537 * Print 1, 5, and 15 minute load averages. 538 */ 539 if (getloadavg(avenrun, sizeof(avenrun) / sizeof(avenrun[0])) == -1) 540 (void)printf(", no load average information available\n"); 541 else { 542 (void)printf(", load averages:"); 543 for (i = 0; i < (sizeof(avenrun) / sizeof(avenrun[0])); i++) { 544 if (i > 0) 545 (void)printf(","); 546 (void)printf(" %.2f", avenrun[i]); 547 } 548 (void)printf("\n"); 549 } 550 } 551 552 #if defined(SUPPORT_UTMP) || defined(SUPPORT_UTMPX) 553 static int 554 ttystat(const char *line, struct stat *st) 555 { 556 char ttybuf[MAXPATHLEN]; 557 558 (void)snprintf(ttybuf, sizeof(ttybuf), "%s%s", _PATH_DEV, line); 559 return stat(ttybuf, st); 560 } 561 562 static void 563 process(struct entry *ep) 564 { 565 struct stat st; 566 time_t touched; 567 int max; 568 569 if ((max = strlen(ep->name)) > maxname) 570 maxname = max; 571 if ((max = strlen(ep->line)) > maxline) 572 maxline = max; 573 if ((max = strlen(ep->host)) > maxhost) 574 maxhost = max; 575 576 ep->tdev = 0; 577 ep->idle = (time_t)-1; 578 579 #ifdef SUPPORT_UTMP 580 /* 581 * Hack to recognize and correctly parse 582 * ut entry made by ftpd. The "tty" used 583 * by ftpd is not a real tty, just identifier in 584 * form ftpPID. Pid parsed from the "tty name" 585 * is used later to match corresponding process. 586 * NB: This is only used for utmp entries. For utmpx, 587 * we already have the pid. 588 */ 589 if (ep->pid == 0 && strncmp(ep->line, "ftp", 3) == 0) { 590 ep->pid = strtol(ep->line + 3, NULL, 10); 591 return; 592 } 593 #endif 594 if (ttystat(ep->line, &st) == -1) 595 return; 596 597 ep->tdev = st.st_rdev; 598 /* 599 * If this is the console device, attempt to ascertain 600 * the true console device dev_t. 601 */ 602 if (ep->tdev == 0) { 603 int mib[2]; 604 size_t size; 605 606 mib[0] = CTL_KERN; 607 mib[1] = KERN_CONSDEV; 608 size = sizeof(dev_t); 609 (void) sysctl(mib, 2, &ep->tdev, &size, NULL, 0); 610 } 611 612 touched = st.st_atime; 613 if (touched < ep->tv.tv_sec) { 614 /* tty untouched since before login */ 615 touched = ep->tv.tv_sec; 616 } 617 if ((ep->idle = now - touched) < 0) 618 ep->idle = 0; 619 } 620 #endif 621 622 static void 623 usage(int wcmd) 624 { 625 626 if (wcmd) 627 (void)fprintf(stderr, 628 "Usage: %s [-hinw] [-M core] [-N system] [user]\n", 629 getprogname()); 630 else 631 (void)fprintf(stderr, "Usage: %s\n", getprogname()); 632 exit(1); 633 } 634
Indexes created Tue Sep 23 07:09:52 GMT 2025