w.c revision 1.66
1 /* $NetBSD: w.c,v 1.66 2004/12/22 17:20:30 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 1.66 2004/12/22 17:20:30 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 #define HOSTWIDTH 35 106 /* 107 * One of these per active utmp entry. 108 */ 109 struct entry { 110 struct entry *next; 111 char name[65]; 112 char line[65]; 113 char host[257]; 114 char type[2]; 115 struct timeval tv; 116 dev_t tdev; /* dev_t of terminal */ 117 time_t idle; /* idle time of terminal in seconds */ 118 struct kinfo_proc2 *tp; /* `most interesting' tty proc */ 119 struct kinfo_proc2 *pp; /* pid proc */ 120 pid_t pid; /* pid or ~0 if not known */ 121 } *ep, *ehead = NULL, **nextp = &ehead; 122 123 static void pr_args(struct kinfo_proc2 *); 124 static void pr_header(time_t *, int); 125 #if defined(SUPPORT_UTMP) || defined(SUPPORT_UTMPX) 126 static int ttystat(const char *, struct stat *); 127 static void process(struct entry *); 128 #endif 129 static void usage(int); 130 131 int main(int, char **); 132 133 int 134 main(int argc, char **argv) 135 { 136 struct kinfo_proc2 *kp; 137 struct hostent *hp; 138 struct in_addr l; 139 int ch, i, nentries, nusers, wcmd; 140 char *memf, *nlistf, *p, *x; 141 time_t then; 142 int hostwidth; 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 p = ""; 161 } else { 162 wcmd = 1; 163 p = "hiM:N:nw"; 164 } 165 166 memf = nlistf = NULL; 167 while ((ch = getopt(argc, argv, p)) != -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 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 #ifdef SUPPORT_UTMPX 202 setutxent(); 203 #endif 204 #ifdef SUPPORT_UTMP 205 setutent(); 206 #endif 207 208 if (*argv) 209 sel_user = *argv; 210 211 nusers = 0; 212 #ifdef SUPPORT_UTMPX 213 while ((utx = getutxent()) != NULL) { 214 if (utx->ut_type != USER_PROCESS) 215 continue; 216 ++nusers; 217 if (sel_user && 218 strncmp(utx->ut_name, sel_user, sizeof(utx->ut_name)) != 0) 219 continue; 220 if ((ep = calloc(1, sizeof(struct entry))) == NULL) 221 err(1, NULL); 222 (void)memcpy(ep->name, utx->ut_name, sizeof(utx->ut_name)); 223 (void)memcpy(ep->line, utx->ut_line, sizeof(utx->ut_line)); 224 ep->name[sizeof(utx->ut_name)] = '\0'; 225 ep->line[sizeof(utx->ut_line)] = '\0'; 226 if (!nflag || getnameinfo((struct sockaddr *)&utx->ut_ss, 227 utx->ut_ss.ss_len, ep->host, sizeof(ep->host), NULL, 0, 228 NI_NUMERICHOST) != 0) { 229 (void)memcpy(ep->host, utx->ut_host, 230 sizeof(utx->ut_host)); 231 ep->host[sizeof(utx->ut_host)] = '\0'; 232 } 233 ep->type[0] = 'x'; 234 ep->tv = utx->ut_tv; 235 ep->pid = utx->ut_pid; 236 *nextp = ep; 237 nextp = &(ep->next); 238 if (wcmd != 0) 239 process(ep); 240 } 241 #endif 242 243 #ifdef SUPPORT_UTMP 244 while ((ut = getutent()) != NULL) { 245 if (ut->ut_name[0] == '\0') 246 continue; 247 248 if (sel_user && 249 strncmp(ut->ut_name, sel_user, sizeof(ut->ut_name)) != 0) 250 continue; 251 252 /* Don't process entries that we have utmpx for */ 253 for (ep = ehead; ep != NULL; ep = ep->next) { 254 if (strncmp(ep->line, ut->ut_line, 255 sizeof(ut->ut_line)) == 0) 256 break; 257 } 258 if (ep != NULL) 259 continue; 260 261 ++nusers; 262 if ((ep = calloc(1, sizeof(struct entry))) == NULL) 263 err(1, NULL); 264 (void)memcpy(ep->name, ut->ut_name, sizeof(ut->ut_name)); 265 (void)memcpy(ep->line, ut->ut_line, sizeof(ut->ut_line)); 266 (void)memcpy(ep->host, ut->ut_host, sizeof(ut->ut_host)); 267 ep->name[sizeof(ut->ut_name)] = '\0'; 268 ep->line[sizeof(ut->ut_line)] = '\0'; 269 ep->host[sizeof(ut->ut_host)] = '\0'; 270 ep->tv.tv_sec = ut->ut_time; 271 *nextp = ep; 272 nextp = &(ep->next); 273 if (wcmd != 0) 274 process(ep); 275 } 276 #endif 277 278 #ifdef SUPPORT_UTMPX 279 endutxent(); 280 #endif 281 #ifdef SUPPORT_UTMP 282 endutent(); 283 #endif 284 285 if (header || wcmd == 0) { 286 pr_header(&now, nusers); 287 if (wcmd == 0) 288 exit (0); 289 } 290 291 if ((kp = kvm_getproc2(kd, KERN_PROC_ALL, 0, 292 sizeof(struct kinfo_proc2), &nentries)) == NULL) 293 errx(1, "%s", kvm_geterr(kd)); 294 295 /* Include trailing space because TTY header starts one column early. */ 296 for (i = 0; i < nentries; i++, kp++) { 297 298 if (kp->p_stat == SIDL || kp->p_stat == SZOMB) 299 continue; 300 301 for (ep = ehead; ep != NULL; ep = ep->next) { 302 if (ep->tdev != 0 && ep->tdev == kp->p_tdev && 303 kp->p__pgid == kp->p_tpgid) { 304 /* 305 * Proc is in foreground of this 306 * terminal 307 */ 308 if (proc_compare(ep->tp, kp)) 309 ep->tp = kp; 310 break; 311 } 312 if (ep->pid != 0 && ep->pid == kp->p_pid) { 313 ep->pp = kp; 314 break; 315 } 316 } 317 } 318 319 if (wflag || maxhost < HOSTWIDTH) 320 hostwidth = maxhost; 321 else 322 hostwidth = HOSTWIDTH; 323 324 argwidth = printf("%-*s TTY %-*s %*s IDLE WHAT\n", 325 maxname, "USER", hostwidth, "FROM", 326 7 /* "dddhhXm" */, "LOGIN@"); 327 argwidth -= sizeof("WHAT\n") - 1 /* NUL */; 328 329 if ((ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) == -1 && 330 ioctl(STDERR_FILENO, TIOCGWINSZ, &ws) == -1 && 331 ioctl(STDIN_FILENO, TIOCGWINSZ, &ws) == -1) || ws.ws_col == 0) 332 ttywidth = 79; 333 else 334 ttywidth = ws.ws_col - 1; 335 argwidth = ttywidth - argwidth; 336 if (argwidth < 4) 337 argwidth = 8; 338 /* sort by idle time */ 339 if (sortidle && ehead != NULL) { 340 struct entry *from = ehead, *save; 341 342 ehead = NULL; 343 while (from != NULL) { 344 for (nextp = &ehead; 345 (*nextp) && from->idle >= (*nextp)->idle; 346 nextp = &(*nextp)->next) 347 continue; 348 save = from; 349 from = from->next; 350 save->next = *nextp; 351 *nextp = save; 352 } 353 } 354 #if defined(SUPPORT_UTMP) && defined(SUPPORT_UTMPX) 355 else if (ehead != NULL) { 356 struct entry *from = ehead, *save; 357 358 ehead = NULL; 359 while (from != NULL) { 360 for (nextp = &ehead; 361 (*nextp) && strcmp(from->line, (*nextp)->line) > 0; 362 nextp = &(*nextp)->next) 363 continue; 364 save = from; 365 from = from->next; 366 save->next = *nextp; 367 *nextp = save; 368 } 369 } 370 #endif 371 372 if (!nflag) { 373 int rv; 374 375 rv = gethostname(domain, sizeof(domain)); 376 domain[sizeof(domain) - 1] = '\0'; 377 if (rv < 0 || (p = strchr(domain, '.')) == 0) 378 domain[0] = '\0'; 379 else 380 memmove(domain, p, strlen(p) + 1); 381 } 382 383 for (ep = ehead; ep != NULL; ep = ep->next) { 384 char host_buf[MAXHOSTNAMELEN + 1]; 385 386 strlcpy(host_buf, ep->host, sizeof(host_buf)); 387 p = *host_buf ? host_buf : "-"; 388 389 for (x = p; x < p + MAXHOSTNAMELEN; x++) 390 if (*x == '\0' || *x == ':') 391 break; 392 if (x == p + MAXHOSTNAMELEN || *x != ':') 393 x = NULL; 394 else 395 *x++ = '\0'; 396 397 if (!nflag && inet_aton(p, &l) && 398 (hp = gethostbyaddr((char *)&l, sizeof(l), AF_INET))) { 399 if (domain[0] != '\0') { 400 p = hp->h_name; 401 p += strlen(hp->h_name); 402 p -= strlen(domain); 403 if (p > hp->h_name && 404 strcasecmp(p, domain) == 0) 405 *p = '\0'; 406 } 407 p = hp->h_name; 408 } 409 if (x) { 410 (void)snprintf(buf, sizeof(buf), "%s:%s", p, x); 411 p = buf; 412 } 413 if (ep->tp != NULL) 414 kp = ep->tp; 415 else if (ep->pp != NULL) 416 kp = ep->pp; 417 else { 418 warnx("Stale utmp%s entry: %s %s %s", 419 ep->type, ep->name, ep->line, ep->host); 420 continue; 421 } 422 (void)printf("%-*s %-7.7s %-*.*s ", 423 maxname, kp->p_login, ep->line, 424 hostwidth, hostwidth, *p ? p : "-"); 425 then = (time_t)ep->tv.tv_sec; 426 pr_attime(&then, &now); 427 pr_idle(ep->idle); 428 pr_args(kp); 429 (void)printf("\n"); 430 } 431 exit(0); 432 } 433 434 static void 435 pr_args(struct kinfo_proc2 *kp) 436 { 437 char **argv; 438 int left; 439 440 if (kp == 0) 441 goto nothing; 442 left = argwidth; 443 argv = kvm_getargv2(kd, kp, argwidth); 444 if (argv == 0) { 445 if (kp->p_comm == 0) { 446 goto nothing; 447 } else { 448 fmt_putc('(', &left); 449 fmt_puts((char *)kp->p_comm, &left); 450 fmt_putc(')', &left); 451 return; 452 } 453 } 454 while (*argv) { 455 fmt_puts(*argv, &left); 456 argv++; 457 fmt_putc(' ', &left); 458 } 459 return; 460 nothing: 461 putchar('-'); 462 } 463 464 static void 465 pr_header(time_t *nowp, int nusers) 466 { 467 double avenrun[3]; 468 time_t uptime; 469 int days, hrs, i, mins; 470 int mib[2]; 471 size_t size; 472 char buf[256]; 473 474 /* 475 * Print time of day. 476 * 477 * SCCS forces the string manipulation below, as it replaces 478 * %, M, and % in a character string with the file name. 479 */ 480 (void)strftime(buf, sizeof(buf), "%l:%" "M%p", localtime(nowp)); 481 buf[sizeof(buf) - 1] = '\0'; 482 (void)printf("%s ", buf); 483 484 /* 485 * Print how long system has been up. 486 * (Found by looking getting "boottime" from the kernel) 487 */ 488 mib[0] = CTL_KERN; 489 mib[1] = KERN_BOOTTIME; 490 size = sizeof(boottime); 491 if (sysctl(mib, 2, &boottime, &size, NULL, 0) != -1 && 492 boottime.tv_sec != 0) { 493 uptime = now - boottime.tv_sec; 494 uptime += 30; 495 if (uptime > SECSPERMIN) { 496 days = uptime / SECSPERDAY; 497 uptime %= SECSPERDAY; 498 hrs = uptime / SECSPERHOUR; 499 uptime %= SECSPERHOUR; 500 mins = uptime / SECSPERMIN; 501 (void)printf(" up"); 502 if (days > 0) 503 (void)printf(" %d day%s,", days, 504 days > 1 ? "s" : ""); 505 if (hrs > 0 && mins > 0) 506 (void)printf(" %2d:%02d,", hrs, mins); 507 else { 508 if (hrs > 0) 509 (void)printf(" %d hr%s,", 510 hrs, hrs > 1 ? "s" : ""); 511 if (mins > 0) 512 (void)printf(" %d min%s,", 513 mins, mins > 1 ? "s" : ""); 514 } 515 } 516 } 517 518 /* Print number of users logged in to system */ 519 (void)printf(" %d user%s", nusers, nusers != 1 ? "s" : ""); 520 521 /* 522 * Print 1, 5, and 15 minute load averages. 523 */ 524 if (getloadavg(avenrun, sizeof(avenrun) / sizeof(avenrun[0])) == -1) 525 (void)printf(", no load average information available\n"); 526 else { 527 (void)printf(", load averages:"); 528 for (i = 0; i < (sizeof(avenrun) / sizeof(avenrun[0])); i++) { 529 if (i > 0) 530 (void)printf(","); 531 (void)printf(" %.2f", avenrun[i]); 532 } 533 (void)printf("\n"); 534 } 535 } 536 537 #if defined(SUPPORT_UTMP) || defined(SUPPORT_UTMPX) 538 static int 539 ttystat(const char *line, struct stat *st) 540 { 541 char ttybuf[MAXPATHLEN]; 542 543 (void)snprintf(ttybuf, sizeof(ttybuf), "%s%s", _PATH_DEV, line); 544 return stat(ttybuf, st); 545 } 546 547 static void 548 process(struct entry *ep) 549 { 550 struct stat st; 551 time_t touched; 552 int max; 553 554 if ((max = strlen(ep->name)) > maxname) 555 maxname = max; 556 if ((max = strlen(ep->line)) > maxline) 557 maxline = max; 558 if ((max = strlen(ep->host)) > maxhost) 559 maxhost = max; 560 561 ep->tdev = 0; 562 ep->idle = (time_t)-1; 563 564 #ifdef SUPPORT_UTMP 565 /* 566 * Hack to recognize and correctly parse 567 * ut entry made by ftpd. The "tty" used 568 * by ftpd is not a real tty, just identifier in 569 * form ftpPID. Pid parsed from the "tty name" 570 * is used later to match corresponding process. 571 * NB: This is only used for utmp entries. For utmpx, 572 * we already have the pid. 573 */ 574 if (ep->pid == 0 && strncmp(ep->line, "ftp", 3) == 0) { 575 ep->pid = strtol(ep->line + 3, NULL, 10); 576 return; 577 } 578 #endif 579 if (ttystat(ep->line, &st) == -1) 580 return; 581 582 ep->tdev = st.st_rdev; 583 /* 584 * If this is the console device, attempt to ascertain 585 * the true console device dev_t. 586 */ 587 if (ep->tdev == 0) { 588 int mib[2]; 589 size_t size; 590 591 mib[0] = CTL_KERN; 592 mib[1] = KERN_CONSDEV; 593 size = sizeof(dev_t); 594 (void) sysctl(mib, 2, &ep->tdev, &size, NULL, 0); 595 } 596 597 touched = st.st_atime; 598 if (touched < ep->tv.tv_sec) { 599 /* tty untouched since before login */ 600 touched = ep->tv.tv_sec; 601 } 602 if ((ep->idle = now - touched) < 0) 603 ep->idle = 0; 604 } 605 #endif 606 607 static void 608 usage(int wcmd) 609 { 610 611 if (wcmd) 612 (void)fprintf(stderr, 613 "Usage: %s [-hinw] [-M core] [-N system] [user]\n", 614 getprogname()); 615 else 616 (void)fprintf(stderr, "Usage: %s\n", getprogname()); 617 exit(1); 618 } 619
Indexes created Thu Oct 30 03:10:01 GMT 2025