w.c revision 1.60
1 /* $NetBSD: w.c,v 1.60 2003/08/07 11:17:13 agc 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 1.60 2003/08/07 11:17:13 agc 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 #define max(a,b) (((a)>(b))?(a):(b)) 91 92 struct timeval boottime; 93 struct winsize ws; 94 kvm_t *kd; 95 time_t now; /* the current time of day */ 96 time_t uptime; /* time of last reboot & elapsed time since */ 97 int ttywidth; /* width of tty */ 98 int argwidth; /* width of tty left to print process args */ 99 int header = 1; /* true if -h flag: don't print heading */ 100 int nflag; /* true if -n flag: don't convert addrs */ 101 int sortidle; /* sort bu idle time */ 102 char *sel_user; /* login of particular user selected */ 103 char domain[MAXHOSTNAMELEN + 1]; 104 int maxname = 8, maxline = 3, maxhost = 16; 105 106 /* 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 struct stat *ttystat(char *); 127 static void process(struct entry *); 128 #endif 129 static void usage(int); 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; 139 char *memf, *nlistf, *p, *x; 140 time_t then; 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 buf[MAXHOSTNAMELEN], errbuf[_POSIX2_LINE_MAX]; 149 150 /* Are we w(1) or uptime(1)? */ 151 progname = getprogname(); 152 if (*progname == '-') 153 progname++; 154 if (*progname == 'u') { 155 wcmd = 0; 156 p = ""; 157 } else { 158 wcmd = 1; 159 p = "hiflM:N:nsuw"; 160 } 161 162 memf = nlistf = NULL; 163 while ((ch = getopt(argc, argv, p)) != -1) 164 switch (ch) { 165 case 'h': 166 header = 0; 167 break; 168 case 'i': 169 sortidle = 1; 170 break; 171 case 'M': 172 header = 0; 173 memf = optarg; 174 break; 175 case 'N': 176 nlistf = optarg; 177 break; 178 case 'n': 179 nflag = 1; 180 break; 181 case 'f': case 'l': case 's': case 'u': case 'w': 182 warnx("[-flsuw] no longer supported"); 183 /* FALLTHROUGH */ 184 case '?': 185 default: 186 usage(wcmd); 187 } 188 argc -= optind; 189 argv += optind; 190 191 if ((kd = kvm_openfiles(nlistf, memf, NULL, 192 memf == NULL ? KVM_NO_FILES : O_RDONLY, errbuf)) == NULL) 193 errx(1, "%s", errbuf); 194 195 (void)time(&now); 196 197 #ifdef SUPPORT_UTMPX 198 setutxent(); 199 #endif 200 #ifdef SUPPORT_UTMP 201 setutent(); 202 #endif 203 204 if (*argv) 205 sel_user = *argv; 206 207 nusers = 0; 208 #ifdef SUPPORT_UTMPX 209 while ((utx = getutxent()) != NULL) { 210 if (utx->ut_type != USER_PROCESS) 211 continue; 212 ++nusers; 213 if (sel_user && 214 strncmp(utx->ut_name, sel_user, sizeof(utx->ut_name) != 0)) 215 continue; 216 if ((ep = calloc(1, sizeof(struct entry))) == NULL) 217 err(1, NULL); 218 (void)memcpy(ep->name, utx->ut_name, sizeof(utx->ut_name)); 219 (void)memcpy(ep->line, utx->ut_line, sizeof(utx->ut_line)); 220 ep->name[sizeof(utx->ut_name)] = '\0'; 221 ep->line[sizeof(utx->ut_line)] = '\0'; 222 if (!nflag || getnameinfo((struct sockaddr *)&utx->ut_ss, 223 utx->ut_ss.ss_len, ep->host, sizeof(ep->host), NULL, 0, 224 NI_NUMERICHOST) != 0) { 225 (void)memcpy(ep->host, utx->ut_host, 226 sizeof(utx->ut_host)); 227 ep->host[sizeof(utx->ut_host)] = '\0'; 228 } 229 ep->type[0] = 'x'; 230 ep->tv = utx->ut_tv; 231 ep->pid = utx->ut_pid; 232 *nextp = ep; 233 nextp = &(ep->next); 234 if (wcmd != 0) 235 process(ep); 236 } 237 #endif 238 239 #ifdef SUPPORT_UTMP 240 while ((ut = getutent()) != NULL) { 241 if (ut->ut_name[0] == '\0') 242 continue; 243 244 if (sel_user && 245 strncmp(ut->ut_name, sel_user, sizeof(ut->ut_name) != 0)) 246 continue; 247 248 /* Don't process entries that we have utmpx for */ 249 for (ep = ehead; ep != NULL; ep = ep->next) { 250 if (strncmp(ep->line, ut->ut_line, 251 sizeof(ut->ut_line)) == 0) 252 break; 253 } 254 if (ep != NULL) 255 continue; 256 257 ++nusers; 258 if ((ep = calloc(1, sizeof(struct entry))) == NULL) 259 err(1, NULL); 260 (void)memcpy(ep->name, ut->ut_name, sizeof(ut->ut_name)); 261 (void)memcpy(ep->line, ut->ut_line, sizeof(ut->ut_line)); 262 (void)memcpy(ep->host, ut->ut_host, sizeof(ut->ut_host)); 263 ep->name[sizeof(ut->ut_name)] = '\0'; 264 ep->line[sizeof(ut->ut_line)] = '\0'; 265 ep->host[sizeof(ut->ut_host)] = '\0'; 266 ep->tv.tv_sec = ut->ut_time; 267 *nextp = ep; 268 nextp = &(ep->next); 269 if (wcmd != 0) 270 process(ep); 271 } 272 #endif 273 274 #ifdef SUPPORT_UTMPX 275 endutxent(); 276 #endif 277 #ifdef SUPPORT_UTMP 278 endutent(); 279 #endif 280 281 if (header || wcmd == 0) { 282 pr_header(&now, nusers); 283 if (wcmd == 0) 284 exit (0); 285 } 286 287 if ((kp = kvm_getproc2(kd, KERN_PROC_ALL, 0, 288 sizeof(struct kinfo_proc2), &nentries)) == NULL) 289 errx(1, "%s", kvm_geterr(kd)); 290 291 /* Include trailing space because TTY header starts one column early. */ 292 for (i = 0; i < nentries; i++, kp++) { 293 294 if (kp->p_stat == SIDL || kp->p_stat == SZOMB) 295 continue; 296 297 for (ep = ehead; ep != NULL; ep = ep->next) { 298 if (ep->tdev != 0 && ep->tdev == kp->p_tdev && 299 kp->p__pgid == kp->p_tpgid) { 300 /* 301 * Proc is in foreground of this 302 * terminal 303 */ 304 if (proc_compare(ep->tp, kp)) 305 ep->tp = kp; 306 break; 307 } 308 if (ep->pid != 0 && ep->pid == kp->p_pid) { 309 ep->pp = kp; 310 break; 311 } 312 } 313 } 314 315 argwidth = printf("%-*sTTY %-*s %*s IDLE WHAT\n", 316 maxname, "USER", maxhost, "FROM", 317 7 /* "dddhhXm" */, "LOGIN@"); 318 argwidth -= sizeof("WHAT\n") - 1 /* NUL */; 319 320 if ((ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) == -1 && 321 ioctl(STDERR_FILENO, TIOCGWINSZ, &ws) == -1 && 322 ioctl(STDIN_FILENO, TIOCGWINSZ, &ws) == -1) || ws.ws_col == 0) 323 ttywidth = 79; 324 else 325 ttywidth = ws.ws_col - 1; 326 argwidth = ttywidth - argwidth; 327 if (argwidth < 4) 328 argwidth = 8; 329 /* sort by idle time */ 330 if (sortidle && ehead != NULL) { 331 struct entry *from = ehead, *save; 332 333 ehead = NULL; 334 while (from != NULL) { 335 for (nextp = &ehead; 336 (*nextp) && from->idle >= (*nextp)->idle; 337 nextp = &(*nextp)->next) 338 continue; 339 save = from; 340 from = from->next; 341 save->next = *nextp; 342 *nextp = save; 343 } 344 } 345 #if defined(SUPPORT_UTMP) && defined(SUPPORT_UTMPX) 346 else if (ehead != NULL) { 347 struct entry *from = ehead, *save; 348 349 ehead = NULL; 350 while (from != NULL) { 351 for (nextp = &ehead; 352 (*nextp) && strcmp(from->line, (*nextp)->line) > 0; 353 nextp = &(*nextp)->next) 354 continue; 355 save = from; 356 from = from->next; 357 save->next = *nextp; 358 *nextp = save; 359 } 360 } 361 #endif 362 363 if (!nflag) { 364 int rv; 365 366 rv = gethostname(domain, sizeof(domain)); 367 domain[sizeof(domain) - 1] = '\0'; 368 if (rv < 0 || (p = strchr(domain, '.')) == 0) 369 domain[0] = '\0'; 370 else 371 memmove(domain, p, strlen(p) + 1); 372 } 373 374 for (ep = ehead; ep != NULL; ep = ep->next) { 375 char host_buf[MAXHOSTNAMELEN + 1]; 376 377 strlcpy(host_buf, ep->host, sizeof(host_buf)); 378 p = *host_buf ? host_buf : "-"; 379 380 for (x = p; x < p + MAXHOSTNAMELEN; x++) 381 if (*x == '\0' || *x == ':') 382 break; 383 if (x == p + MAXHOSTNAMELEN || *x != ':') 384 x = NULL; 385 else 386 *x++ = '\0'; 387 388 if (!nflag && inet_aton(p, &l) && 389 (hp = gethostbyaddr((char *)&l, sizeof(l), AF_INET))) { 390 if (domain[0] != '\0') { 391 p = hp->h_name; 392 p += strlen(hp->h_name); 393 p -= strlen(domain); 394 if (p > hp->h_name && 395 strcasecmp(p, domain) == 0) 396 *p = '\0'; 397 } 398 p = hp->h_name; 399 } 400 if (x) { 401 (void)snprintf(buf, sizeof(buf), "%s:%s", p, x); 402 p = buf; 403 } 404 if (ep->tp != NULL) 405 kp = ep->tp; 406 else if (ep->pp != NULL) 407 kp = ep->pp; 408 else { 409 warnx("Stale utmp%s entry: %s %s %s", 410 ep->type, ep->name, ep->line, ep->host); 411 continue; 412 } 413 (void)printf("%-*s %-2.2s %-*.*s ", 414 maxname, kp->p_login, 415 (strncmp(ep->line, "tty", 3) && 416 strncmp(ep->line, "dty", 3)) ? 417 ep->line : ep->line + 3, 418 maxhost, maxhost, *p ? p : "-"); 419 then = (time_t)ep->tv.tv_sec; 420 pr_attime(&then, &now); 421 pr_idle(ep->idle); 422 pr_args(kp); 423 (void)printf("\n"); 424 } 425 exit(0); 426 } 427 428 static void 429 pr_args(struct kinfo_proc2 *kp) 430 { 431 char **argv; 432 int left; 433 434 if (kp == 0) 435 goto nothing; 436 left = argwidth; 437 argv = kvm_getargv2(kd, kp, argwidth); 438 if (argv == 0) { 439 if (kp->p_comm == 0) { 440 goto nothing; 441 } else { 442 fmt_putc('(', &left); 443 fmt_puts((char *)kp->p_comm, &left); 444 fmt_putc(')', &left); 445 return; 446 } 447 } 448 while (*argv) { 449 fmt_puts(*argv, &left); 450 argv++; 451 fmt_putc(' ', &left); 452 } 453 return; 454 nothing: 455 putchar('-'); 456 } 457 458 static void 459 pr_header(time_t *nowp, int nusers) 460 { 461 double avenrun[3]; 462 time_t uptime; 463 int days, hrs, i, mins; 464 int mib[2]; 465 size_t size; 466 char buf[256]; 467 468 /* 469 * Print time of day. 470 * 471 * SCCS forces the string manipulation below, as it replaces 472 * %, M, and % in a character string with the file name. 473 */ 474 (void)strftime(buf, sizeof(buf), "%l:%" "M%p", localtime(nowp)); 475 buf[sizeof(buf) - 1] = '\0'; 476 (void)printf("%s ", buf); 477 478 /* 479 * Print how long system has been up. 480 * (Found by looking getting "boottime" from the kernel) 481 */ 482 mib[0] = CTL_KERN; 483 mib[1] = KERN_BOOTTIME; 484 size = sizeof(boottime); 485 if (sysctl(mib, 2, &boottime, &size, NULL, 0) != -1 && 486 boottime.tv_sec != 0) { 487 uptime = now - boottime.tv_sec; 488 uptime += 30; 489 if (uptime > SECSPERMIN) { 490 days = uptime / SECSPERDAY; 491 uptime %= SECSPERDAY; 492 hrs = uptime / SECSPERHOUR; 493 uptime %= SECSPERHOUR; 494 mins = uptime / SECSPERMIN; 495 (void)printf(" up"); 496 if (days > 0) 497 (void)printf(" %d day%s,", days, 498 days > 1 ? "s" : ""); 499 if (hrs > 0 && mins > 0) 500 (void)printf(" %2d:%02d,", hrs, mins); 501 else { 502 if (hrs > 0) 503 (void)printf(" %d hr%s,", 504 hrs, hrs > 1 ? "s" : ""); 505 if (mins > 0) 506 (void)printf(" %d min%s,", 507 mins, mins > 1 ? "s" : ""); 508 } 509 } 510 } 511 512 /* Print number of users logged in to system */ 513 (void)printf(" %d user%s", nusers, nusers != 1 ? "s" : ""); 514 515 /* 516 * Print 1, 5, and 15 minute load averages. 517 */ 518 if (getloadavg(avenrun, sizeof(avenrun) / sizeof(avenrun[0])) == -1) 519 (void)printf(", no load average information available\n"); 520 else { 521 (void)printf(", load averages:"); 522 for (i = 0; i < (sizeof(avenrun) / sizeof(avenrun[0])); i++) { 523 if (i > 0) 524 (void)printf(","); 525 (void)printf(" %.2f", avenrun[i]); 526 } 527 (void)printf("\n"); 528 } 529 } 530 531 #if defined(SUPPORT_UTMP) || defined(SUPPORT_UTMPX) 532 static struct stat * 533 ttystat(char *line) 534 { 535 static struct stat sb; 536 char ttybuf[MAXPATHLEN]; 537 538 (void)snprintf(ttybuf, sizeof(ttybuf), "%s%s", _PATH_DEV, line); 539 if (stat(ttybuf, &sb)) 540 return (NULL); 541 return (&sb); 542 } 543 544 static void 545 process(struct entry *ep) 546 { 547 struct stat *stp; 548 time_t touched; 549 int max; 550 551 if ((max = strlen(ep->name)) > maxname) 552 maxname = max; 553 if ((max = strlen(ep->line)) > maxline) 554 maxline = max; 555 if ((max = strlen(ep->host)) > maxhost) 556 maxhost = max; 557 558 559 #ifdef SUPPORT_UTMP 560 /* 561 * Hack to recognize and correctly parse 562 * ut entry made by ftpd. The "tty" used 563 * by ftpd is not a real tty, just identifier in 564 * form ftpSUPPORT_ID. Pid parsed from the "tty name" 565 * is used later to match corresponding process. 566 * NB: This is only used for utmp entries. For utmpx, 567 * we already have the pid. 568 */ 569 if (ep->pid == 0 && strncmp(ep->line, "ftp", 3) == 0) { 570 ep->pid = strtol(ep->line + 3, NULL, 10); 571 return; 572 } 573 #endif 574 if ((stp = ttystat(ep->line)) == NULL) 575 return; 576 577 ep->tdev = stp->st_rdev; 578 /* 579 * If this is the console device, attempt to ascertain 580 * the true console device dev_t. 581 */ 582 if (ep->tdev == 0) { 583 int mib[2]; 584 size_t size; 585 586 mib[0] = CTL_KERN; 587 mib[1] = KERN_CONSDEV; 588 size = sizeof(dev_t); 589 (void) sysctl(mib, 2, &ep->tdev, &size, NULL, 0); 590 } 591 592 touched = stp->st_atime; 593 if (touched < ep->tv.tv_sec) { 594 /* tty untouched since before login */ 595 touched = ep->tv.tv_sec; 596 } 597 if ((ep->idle = now - touched) < 0) 598 ep->idle = 0; 599 } 600 #endif 601 602 static void 603 usage(int wcmd) 604 { 605 606 if (wcmd) 607 (void)fprintf(stderr, 608 "usage: w: [-hin] [-M core] [-N system] [user]\n"); 609 else 610 (void)fprintf(stderr, "uptime\n"); 611 exit(1); 612 } 613
Indexes created Wed Sep 24 05:09:52 GMT 2025