w.c revision 1.62
1 /* $NetBSD: w.c,v 1.62 2004/11/10 16:58:10 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 1.62 2004/11/10 16:58:10 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 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[65]; 110 char line[65]; 111 char host[257]; 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 } *ep, *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 struct stat *ttystat(char *); 125 static void process(struct entry *); 126 #endif 127 static void usage(int); 128 int main(int, char **); 129 130 int 131 main(int argc, char **argv) 132 { 133 struct kinfo_proc2 *kp; 134 struct hostent *hp; 135 struct in_addr l; 136 int ch, i, nentries, nusers, wcmd; 137 char *memf, *nlistf, *p, *x; 138 time_t then; 139 #ifdef SUPPORT_UTMP 140 struct utmp *ut; 141 #endif 142 #ifdef SUPPORT_UTMPX 143 struct utmpx *utx; 144 #endif 145 const char *progname; 146 char buf[MAXHOSTNAMELEN], errbuf[_POSIX2_LINE_MAX]; 147 148 /* Are we w(1) or uptime(1)? */ 149 progname = getprogname(); 150 if (*progname == '-') 151 progname++; 152 if (*progname == 'u') { 153 wcmd = 0; 154 p = ""; 155 } else { 156 wcmd = 1; 157 p = "hiflM:N:nsuw"; 158 } 159 160 memf = nlistf = NULL; 161 while ((ch = getopt(argc, argv, p)) != -1) 162 switch (ch) { 163 case 'h': 164 header = 0; 165 break; 166 case 'i': 167 sortidle = 1; 168 break; 169 case 'M': 170 header = 0; 171 memf = optarg; 172 break; 173 case 'N': 174 nlistf = optarg; 175 break; 176 case 'n': 177 nflag = 1; 178 break; 179 case 'f': case 'l': case 's': case 'u': case 'w': 180 warnx("[-flsuw] no longer supported"); 181 /* FALLTHROUGH */ 182 case '?': 183 default: 184 usage(wcmd); 185 } 186 argc -= optind; 187 argv += optind; 188 189 if ((kd = kvm_openfiles(nlistf, memf, NULL, 190 memf == NULL ? KVM_NO_FILES : O_RDONLY, errbuf)) == NULL) 191 errx(1, "%s", errbuf); 192 193 (void)time(&now); 194 195 #ifdef SUPPORT_UTMPX 196 setutxent(); 197 #endif 198 #ifdef SUPPORT_UTMP 199 setutent(); 200 #endif 201 202 if (*argv) 203 sel_user = *argv; 204 205 nusers = 0; 206 #ifdef SUPPORT_UTMPX 207 while ((utx = getutxent()) != NULL) { 208 if (utx->ut_type != USER_PROCESS) 209 continue; 210 ++nusers; 211 if (sel_user && 212 strncmp(utx->ut_name, sel_user, sizeof(utx->ut_name) != 0)) 213 continue; 214 if ((ep = calloc(1, sizeof(struct entry))) == NULL) 215 err(1, NULL); 216 (void)memcpy(ep->name, utx->ut_name, sizeof(utx->ut_name)); 217 (void)memcpy(ep->line, utx->ut_line, sizeof(utx->ut_line)); 218 ep->name[sizeof(utx->ut_name)] = '\0'; 219 ep->line[sizeof(utx->ut_line)] = '\0'; 220 if (!nflag || getnameinfo((struct sockaddr *)&utx->ut_ss, 221 utx->ut_ss.ss_len, ep->host, sizeof(ep->host), NULL, 0, 222 NI_NUMERICHOST) != 0) { 223 (void)memcpy(ep->host, utx->ut_host, 224 sizeof(utx->ut_host)); 225 ep->host[sizeof(utx->ut_host)] = '\0'; 226 } 227 ep->type[0] = 'x'; 228 ep->tv = utx->ut_tv; 229 ep->pid = utx->ut_pid; 230 *nextp = ep; 231 nextp = &(ep->next); 232 if (wcmd != 0) 233 process(ep); 234 } 235 #endif 236 237 #ifdef SUPPORT_UTMP 238 while ((ut = getutent()) != NULL) { 239 if (ut->ut_name[0] == '\0') 240 continue; 241 242 if (sel_user && 243 strncmp(ut->ut_name, sel_user, sizeof(ut->ut_name) != 0)) 244 continue; 245 246 /* Don't process entries that we have utmpx for */ 247 for (ep = ehead; ep != NULL; ep = ep->next) { 248 if (strncmp(ep->line, ut->ut_line, 249 sizeof(ut->ut_line)) == 0) 250 break; 251 } 252 if (ep != NULL) 253 continue; 254 255 ++nusers; 256 if ((ep = calloc(1, sizeof(struct entry))) == NULL) 257 err(1, NULL); 258 (void)memcpy(ep->name, ut->ut_name, sizeof(ut->ut_name)); 259 (void)memcpy(ep->line, ut->ut_line, sizeof(ut->ut_line)); 260 (void)memcpy(ep->host, ut->ut_host, sizeof(ut->ut_host)); 261 ep->name[sizeof(ut->ut_name)] = '\0'; 262 ep->line[sizeof(ut->ut_line)] = '\0'; 263 ep->host[sizeof(ut->ut_host)] = '\0'; 264 ep->tv.tv_sec = ut->ut_time; 265 *nextp = ep; 266 nextp = &(ep->next); 267 if (wcmd != 0) 268 process(ep); 269 } 270 #endif 271 272 #ifdef SUPPORT_UTMPX 273 endutxent(); 274 #endif 275 #ifdef SUPPORT_UTMP 276 endutent(); 277 #endif 278 279 if (header || wcmd == 0) { 280 pr_header(&now, nusers); 281 if (wcmd == 0) 282 exit (0); 283 } 284 285 if ((kp = kvm_getproc2(kd, KERN_PROC_ALL, 0, 286 sizeof(struct kinfo_proc2), &nentries)) == NULL) 287 errx(1, "%s", kvm_geterr(kd)); 288 289 /* Include trailing space because TTY header starts one column early. */ 290 for (i = 0; i < nentries; i++, kp++) { 291 292 if (kp->p_stat == SIDL || kp->p_stat == SZOMB) 293 continue; 294 295 for (ep = ehead; ep != NULL; ep = ep->next) { 296 if (ep->tdev != 0 && ep->tdev == kp->p_tdev && 297 kp->p__pgid == kp->p_tpgid) { 298 /* 299 * Proc is in foreground of this 300 * terminal 301 */ 302 if (proc_compare(ep->tp, kp)) 303 ep->tp = kp; 304 break; 305 } 306 if (ep->pid != 0 && ep->pid == kp->p_pid) { 307 ep->pp = kp; 308 break; 309 } 310 } 311 } 312 313 argwidth = printf("%-*s TTY %-*s %*s IDLE WHAT\n", 314 maxname, "USER", maxhost, "FROM", 315 7 /* "dddhhXm" */, "LOGIN@"); 316 argwidth -= sizeof("WHAT\n") - 1 /* NUL */; 317 318 if ((ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) == -1 && 319 ioctl(STDERR_FILENO, TIOCGWINSZ, &ws) == -1 && 320 ioctl(STDIN_FILENO, TIOCGWINSZ, &ws) == -1) || ws.ws_col == 0) 321 ttywidth = 79; 322 else 323 ttywidth = ws.ws_col - 1; 324 argwidth = ttywidth - argwidth; 325 if (argwidth < 4) 326 argwidth = 8; 327 /* sort by idle time */ 328 if (sortidle && ehead != NULL) { 329 struct entry *from = ehead, *save; 330 331 ehead = NULL; 332 while (from != NULL) { 333 for (nextp = &ehead; 334 (*nextp) && from->idle >= (*nextp)->idle; 335 nextp = &(*nextp)->next) 336 continue; 337 save = from; 338 from = from->next; 339 save->next = *nextp; 340 *nextp = save; 341 } 342 } 343 #if defined(SUPPORT_UTMP) && defined(SUPPORT_UTMPX) 344 else if (ehead != NULL) { 345 struct entry *from = ehead, *save; 346 347 ehead = NULL; 348 while (from != NULL) { 349 for (nextp = &ehead; 350 (*nextp) && strcmp(from->line, (*nextp)->line) > 0; 351 nextp = &(*nextp)->next) 352 continue; 353 save = from; 354 from = from->next; 355 save->next = *nextp; 356 *nextp = save; 357 } 358 } 359 #endif 360 361 if (!nflag) { 362 int rv; 363 364 rv = gethostname(domain, sizeof(domain)); 365 domain[sizeof(domain) - 1] = '\0'; 366 if (rv < 0 || (p = strchr(domain, '.')) == 0) 367 domain[0] = '\0'; 368 else 369 memmove(domain, p, strlen(p) + 1); 370 } 371 372 for (ep = ehead; ep != NULL; ep = ep->next) { 373 char host_buf[MAXHOSTNAMELEN + 1]; 374 375 strlcpy(host_buf, ep->host, sizeof(host_buf)); 376 p = *host_buf ? host_buf : "-"; 377 378 for (x = p; x < p + MAXHOSTNAMELEN; x++) 379 if (*x == '\0' || *x == ':') 380 break; 381 if (x == p + MAXHOSTNAMELEN || *x != ':') 382 x = NULL; 383 else 384 *x++ = '\0'; 385 386 if (!nflag && inet_aton(p, &l) && 387 (hp = gethostbyaddr((char *)&l, sizeof(l), AF_INET))) { 388 if (domain[0] != '\0') { 389 p = hp->h_name; 390 p += strlen(hp->h_name); 391 p -= strlen(domain); 392 if (p > hp->h_name && 393 strcasecmp(p, domain) == 0) 394 *p = '\0'; 395 } 396 p = hp->h_name; 397 } 398 if (x) { 399 (void)snprintf(buf, sizeof(buf), "%s:%s", p, x); 400 p = buf; 401 } 402 if (ep->tp != NULL) 403 kp = ep->tp; 404 else if (ep->pp != NULL) 405 kp = ep->pp; 406 else { 407 warnx("Stale utmp%s entry: %s %s %s", 408 ep->type, ep->name, ep->line, ep->host); 409 continue; 410 } 411 (void)printf("%-*s %-7.7s %-*.*s ", 412 maxname, kp->p_login, ep->line, 413 maxhost, maxhost, *p ? p : "-"); 414 then = (time_t)ep->tv.tv_sec; 415 pr_attime(&then, &now); 416 pr_idle(ep->idle); 417 pr_args(kp); 418 (void)printf("\n"); 419 } 420 exit(0); 421 } 422 423 static void 424 pr_args(struct kinfo_proc2 *kp) 425 { 426 char **argv; 427 int left; 428 429 if (kp == 0) 430 goto nothing; 431 left = argwidth; 432 argv = kvm_getargv2(kd, kp, argwidth); 433 if (argv == 0) { 434 if (kp->p_comm == 0) { 435 goto nothing; 436 } else { 437 fmt_putc('(', &left); 438 fmt_puts((char *)kp->p_comm, &left); 439 fmt_putc(')', &left); 440 return; 441 } 442 } 443 while (*argv) { 444 fmt_puts(*argv, &left); 445 argv++; 446 fmt_putc(' ', &left); 447 } 448 return; 449 nothing: 450 putchar('-'); 451 } 452 453 static void 454 pr_header(time_t *nowp, int nusers) 455 { 456 double avenrun[3]; 457 time_t uptime; 458 int days, hrs, i, mins; 459 int mib[2]; 460 size_t size; 461 char buf[256]; 462 463 /* 464 * Print time of day. 465 * 466 * SCCS forces the string manipulation below, as it replaces 467 * %, M, and % in a character string with the file name. 468 */ 469 (void)strftime(buf, sizeof(buf), "%l:%" "M%p", localtime(nowp)); 470 buf[sizeof(buf) - 1] = '\0'; 471 (void)printf("%s ", buf); 472 473 /* 474 * Print how long system has been up. 475 * (Found by looking getting "boottime" from the kernel) 476 */ 477 mib[0] = CTL_KERN; 478 mib[1] = KERN_BOOTTIME; 479 size = sizeof(boottime); 480 if (sysctl(mib, 2, &boottime, &size, NULL, 0) != -1 && 481 boottime.tv_sec != 0) { 482 uptime = now - boottime.tv_sec; 483 uptime += 30; 484 if (uptime > SECSPERMIN) { 485 days = uptime / SECSPERDAY; 486 uptime %= SECSPERDAY; 487 hrs = uptime / SECSPERHOUR; 488 uptime %= SECSPERHOUR; 489 mins = uptime / SECSPERMIN; 490 (void)printf(" up"); 491 if (days > 0) 492 (void)printf(" %d day%s,", days, 493 days > 1 ? "s" : ""); 494 if (hrs > 0 && mins > 0) 495 (void)printf(" %2d:%02d,", hrs, mins); 496 else { 497 if (hrs > 0) 498 (void)printf(" %d hr%s,", 499 hrs, hrs > 1 ? "s" : ""); 500 if (mins > 0) 501 (void)printf(" %d min%s,", 502 mins, mins > 1 ? "s" : ""); 503 } 504 } 505 } 506 507 /* Print number of users logged in to system */ 508 (void)printf(" %d user%s", nusers, nusers != 1 ? "s" : ""); 509 510 /* 511 * Print 1, 5, and 15 minute load averages. 512 */ 513 if (getloadavg(avenrun, sizeof(avenrun) / sizeof(avenrun[0])) == -1) 514 (void)printf(", no load average information available\n"); 515 else { 516 (void)printf(", load averages:"); 517 for (i = 0; i < (sizeof(avenrun) / sizeof(avenrun[0])); i++) { 518 if (i > 0) 519 (void)printf(","); 520 (void)printf(" %.2f", avenrun[i]); 521 } 522 (void)printf("\n"); 523 } 524 } 525 526 #if defined(SUPPORT_UTMP) || defined(SUPPORT_UTMPX) 527 static struct stat * 528 ttystat(char *line) 529 { 530 static struct stat sb; 531 char ttybuf[MAXPATHLEN]; 532 533 (void)snprintf(ttybuf, sizeof(ttybuf), "%s%s", _PATH_DEV, line); 534 if (stat(ttybuf, &sb)) 535 return (NULL); 536 return (&sb); 537 } 538 539 static void 540 process(struct entry *ep) 541 { 542 struct stat *stp; 543 time_t touched; 544 int max; 545 546 if ((max = strlen(ep->name)) > maxname) 547 maxname = max; 548 if ((max = strlen(ep->line)) > maxline) 549 maxline = max; 550 if ((max = strlen(ep->host)) > maxhost) 551 maxhost = max; 552 553 554 #ifdef SUPPORT_UTMP 555 /* 556 * Hack to recognize and correctly parse 557 * ut entry made by ftpd. The "tty" used 558 * by ftpd is not a real tty, just identifier in 559 * form ftpSUPPORT_ID. Pid parsed from the "tty name" 560 * is used later to match corresponding process. 561 * NB: This is only used for utmp entries. For utmpx, 562 * we already have the pid. 563 */ 564 if (ep->pid == 0 && strncmp(ep->line, "ftp", 3) == 0) { 565 ep->pid = strtol(ep->line + 3, NULL, 10); 566 return; 567 } 568 #endif 569 if ((stp = ttystat(ep->line)) == NULL) 570 return; 571 572 ep->tdev = stp->st_rdev; 573 /* 574 * If this is the console device, attempt to ascertain 575 * the true console device dev_t. 576 */ 577 if (ep->tdev == 0) { 578 int mib[2]; 579 size_t size; 580 581 mib[0] = CTL_KERN; 582 mib[1] = KERN_CONSDEV; 583 size = sizeof(dev_t); 584 (void) sysctl(mib, 2, &ep->tdev, &size, NULL, 0); 585 } 586 587 touched = stp->st_atime; 588 if (touched < ep->tv.tv_sec) { 589 /* tty untouched since before login */ 590 touched = ep->tv.tv_sec; 591 } 592 if ((ep->idle = now - touched) < 0) 593 ep->idle = 0; 594 } 595 #endif 596 597 static void 598 usage(int wcmd) 599 { 600 601 if (wcmd) 602 (void)fprintf(stderr, 603 "usage: w: [-hin] [-M core] [-N system] [user]\n"); 604 else 605 (void)fprintf(stderr, "uptime\n"); 606 exit(1); 607 } 608
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