w.c revision 1.65
1 /* $NetBSD: w.c,v 1.65 2004/12/22 17:16:08 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 1.65 2004/12/22 17:16:08 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 /* Are we w(1) or uptime(1)? */ 153 progname = getprogname(); 154 if (*progname == '-') 155 progname++; 156 if (*progname == 'u') { 157 wcmd = 0; 158 p = ""; 159 } else { 160 wcmd = 1; 161 p = "hiM:N:nw"; 162 } 163 164 memf = nlistf = NULL; 165 while ((ch = getopt(argc, argv, p)) != -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 if ((kd = kvm_openfiles(nlistf, memf, NULL, 194 memf == NULL ? KVM_NO_FILES : O_RDONLY, errbuf)) == NULL) 195 errx(1, "%s", errbuf); 196 197 (void)time(&now); 198 199 #ifdef SUPPORT_UTMPX 200 setutxent(); 201 #endif 202 #ifdef SUPPORT_UTMP 203 setutent(); 204 #endif 205 206 if (*argv) 207 sel_user = *argv; 208 209 nusers = 0; 210 #ifdef SUPPORT_UTMPX 211 while ((utx = getutxent()) != NULL) { 212 if (utx->ut_type != USER_PROCESS) 213 continue; 214 ++nusers; 215 if (sel_user && 216 strncmp(utx->ut_name, sel_user, sizeof(utx->ut_name)) != 0) 217 continue; 218 if ((ep = calloc(1, sizeof(struct entry))) == NULL) 219 err(1, NULL); 220 (void)memcpy(ep->name, utx->ut_name, sizeof(utx->ut_name)); 221 (void)memcpy(ep->line, utx->ut_line, sizeof(utx->ut_line)); 222 ep->name[sizeof(utx->ut_name)] = '\0'; 223 ep->line[sizeof(utx->ut_line)] = '\0'; 224 if (!nflag || getnameinfo((struct sockaddr *)&utx->ut_ss, 225 utx->ut_ss.ss_len, ep->host, sizeof(ep->host), NULL, 0, 226 NI_NUMERICHOST) != 0) { 227 (void)memcpy(ep->host, utx->ut_host, 228 sizeof(utx->ut_host)); 229 ep->host[sizeof(utx->ut_host)] = '\0'; 230 } 231 ep->type[0] = 'x'; 232 ep->tv = utx->ut_tv; 233 ep->pid = utx->ut_pid; 234 *nextp = ep; 235 nextp = &(ep->next); 236 if (wcmd != 0) 237 process(ep); 238 } 239 #endif 240 241 #ifdef SUPPORT_UTMP 242 while ((ut = getutent()) != NULL) { 243 if (ut->ut_name[0] == '\0') 244 continue; 245 246 if (sel_user && 247 strncmp(ut->ut_name, sel_user, sizeof(ut->ut_name)) != 0) 248 continue; 249 250 /* Don't process entries that we have utmpx for */ 251 for (ep = ehead; ep != NULL; ep = ep->next) { 252 if (strncmp(ep->line, ut->ut_line, 253 sizeof(ut->ut_line)) == 0) 254 break; 255 } 256 if (ep != NULL) 257 continue; 258 259 ++nusers; 260 if ((ep = calloc(1, sizeof(struct entry))) == NULL) 261 err(1, NULL); 262 (void)memcpy(ep->name, ut->ut_name, sizeof(ut->ut_name)); 263 (void)memcpy(ep->line, ut->ut_line, sizeof(ut->ut_line)); 264 (void)memcpy(ep->host, ut->ut_host, sizeof(ut->ut_host)); 265 ep->name[sizeof(ut->ut_name)] = '\0'; 266 ep->line[sizeof(ut->ut_line)] = '\0'; 267 ep->host[sizeof(ut->ut_host)] = '\0'; 268 ep->tv.tv_sec = ut->ut_time; 269 *nextp = ep; 270 nextp = &(ep->next); 271 if (wcmd != 0) 272 process(ep); 273 } 274 #endif 275 276 #ifdef SUPPORT_UTMPX 277 endutxent(); 278 #endif 279 #ifdef SUPPORT_UTMP 280 endutent(); 281 #endif 282 283 if (header || wcmd == 0) { 284 pr_header(&now, nusers); 285 if (wcmd == 0) 286 exit (0); 287 } 288 289 if ((kp = kvm_getproc2(kd, KERN_PROC_ALL, 0, 290 sizeof(struct kinfo_proc2), &nentries)) == NULL) 291 errx(1, "%s", kvm_geterr(kd)); 292 293 /* Include trailing space because TTY header starts one column early. */ 294 for (i = 0; i < nentries; i++, kp++) { 295 296 if (kp->p_stat == SIDL || kp->p_stat == SZOMB) 297 continue; 298 299 for (ep = ehead; ep != NULL; ep = ep->next) { 300 if (ep->tdev != 0 && ep->tdev == kp->p_tdev && 301 kp->p__pgid == kp->p_tpgid) { 302 /* 303 * Proc is in foreground of this 304 * terminal 305 */ 306 if (proc_compare(ep->tp, kp)) 307 ep->tp = kp; 308 break; 309 } 310 if (ep->pid != 0 && ep->pid == kp->p_pid) { 311 ep->pp = kp; 312 break; 313 } 314 } 315 } 316 317 if (wflag || maxhost < HOSTWIDTH) 318 hostwidth = maxhost; 319 else 320 hostwidth = HOSTWIDTH; 321 322 argwidth = printf("%-*s TTY %-*s %*s IDLE WHAT\n", 323 maxname, "USER", hostwidth, "FROM", 324 7 /* "dddhhXm" */, "LOGIN@"); 325 argwidth -= sizeof("WHAT\n") - 1 /* NUL */; 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 argwidth = ttywidth - argwidth; 334 if (argwidth < 4) 335 argwidth = 8; 336 /* sort by idle time */ 337 if (sortidle && ehead != NULL) { 338 struct entry *from = ehead, *save; 339 340 ehead = NULL; 341 while (from != NULL) { 342 for (nextp = &ehead; 343 (*nextp) && from->idle >= (*nextp)->idle; 344 nextp = &(*nextp)->next) 345 continue; 346 save = from; 347 from = from->next; 348 save->next = *nextp; 349 *nextp = save; 350 } 351 } 352 #if defined(SUPPORT_UTMP) && defined(SUPPORT_UTMPX) 353 else if (ehead != NULL) { 354 struct entry *from = ehead, *save; 355 356 ehead = NULL; 357 while (from != NULL) { 358 for (nextp = &ehead; 359 (*nextp) && strcmp(from->line, (*nextp)->line) > 0; 360 nextp = &(*nextp)->next) 361 continue; 362 save = from; 363 from = from->next; 364 save->next = *nextp; 365 *nextp = save; 366 } 367 } 368 #endif 369 370 if (!nflag) { 371 int rv; 372 373 rv = gethostname(domain, sizeof(domain)); 374 domain[sizeof(domain) - 1] = '\0'; 375 if (rv < 0 || (p = strchr(domain, '.')) == 0) 376 domain[0] = '\0'; 377 else 378 memmove(domain, p, strlen(p) + 1); 379 } 380 381 for (ep = ehead; ep != NULL; ep = ep->next) { 382 char host_buf[MAXHOSTNAMELEN + 1]; 383 384 strlcpy(host_buf, ep->host, sizeof(host_buf)); 385 p = *host_buf ? host_buf : "-"; 386 387 for (x = p; x < p + MAXHOSTNAMELEN; x++) 388 if (*x == '\0' || *x == ':') 389 break; 390 if (x == p + MAXHOSTNAMELEN || *x != ':') 391 x = NULL; 392 else 393 *x++ = '\0'; 394 395 if (!nflag && inet_aton(p, &l) && 396 (hp = gethostbyaddr((char *)&l, sizeof(l), AF_INET))) { 397 if (domain[0] != '\0') { 398 p = hp->h_name; 399 p += strlen(hp->h_name); 400 p -= strlen(domain); 401 if (p > hp->h_name && 402 strcasecmp(p, domain) == 0) 403 *p = '\0'; 404 } 405 p = hp->h_name; 406 } 407 if (x) { 408 (void)snprintf(buf, sizeof(buf), "%s:%s", p, x); 409 p = buf; 410 } 411 if (ep->tp != NULL) 412 kp = ep->tp; 413 else if (ep->pp != NULL) 414 kp = ep->pp; 415 else { 416 warnx("Stale utmp%s entry: %s %s %s", 417 ep->type, ep->name, ep->line, ep->host); 418 continue; 419 } 420 (void)printf("%-*s %-7.7s %-*.*s ", 421 maxname, kp->p_login, ep->line, 422 hostwidth, hostwidth, *p ? p : "-"); 423 then = (time_t)ep->tv.tv_sec; 424 pr_attime(&then, &now); 425 pr_idle(ep->idle); 426 pr_args(kp); 427 (void)printf("\n"); 428 } 429 exit(0); 430 } 431 432 static void 433 pr_args(struct kinfo_proc2 *kp) 434 { 435 char **argv; 436 int left; 437 438 if (kp == 0) 439 goto nothing; 440 left = argwidth; 441 argv = kvm_getargv2(kd, kp, argwidth); 442 if (argv == 0) { 443 if (kp->p_comm == 0) { 444 goto nothing; 445 } else { 446 fmt_putc('(', &left); 447 fmt_puts((char *)kp->p_comm, &left); 448 fmt_putc(')', &left); 449 return; 450 } 451 } 452 while (*argv) { 453 fmt_puts(*argv, &left); 454 argv++; 455 fmt_putc(' ', &left); 456 } 457 return; 458 nothing: 459 putchar('-'); 460 } 461 462 static void 463 pr_header(time_t *nowp, int nusers) 464 { 465 double avenrun[3]; 466 time_t uptime; 467 int days, hrs, i, mins; 468 int mib[2]; 469 size_t size; 470 char buf[256]; 471 472 /* 473 * Print time of day. 474 * 475 * SCCS forces the string manipulation below, as it replaces 476 * %, M, and % in a character string with the file name. 477 */ 478 (void)strftime(buf, sizeof(buf), "%l:%" "M%p", localtime(nowp)); 479 buf[sizeof(buf) - 1] = '\0'; 480 (void)printf("%s ", buf); 481 482 /* 483 * Print how long system has been up. 484 * (Found by looking getting "boottime" from the kernel) 485 */ 486 mib[0] = CTL_KERN; 487 mib[1] = KERN_BOOTTIME; 488 size = sizeof(boottime); 489 if (sysctl(mib, 2, &boottime, &size, NULL, 0) != -1 && 490 boottime.tv_sec != 0) { 491 uptime = now - boottime.tv_sec; 492 uptime += 30; 493 if (uptime > SECSPERMIN) { 494 days = uptime / SECSPERDAY; 495 uptime %= SECSPERDAY; 496 hrs = uptime / SECSPERHOUR; 497 uptime %= SECSPERHOUR; 498 mins = uptime / SECSPERMIN; 499 (void)printf(" up"); 500 if (days > 0) 501 (void)printf(" %d day%s,", days, 502 days > 1 ? "s" : ""); 503 if (hrs > 0 && mins > 0) 504 (void)printf(" %2d:%02d,", hrs, mins); 505 else { 506 if (hrs > 0) 507 (void)printf(" %d hr%s,", 508 hrs, hrs > 1 ? "s" : ""); 509 if (mins > 0) 510 (void)printf(" %d min%s,", 511 mins, mins > 1 ? "s" : ""); 512 } 513 } 514 } 515 516 /* Print number of users logged in to system */ 517 (void)printf(" %d user%s", nusers, nusers != 1 ? "s" : ""); 518 519 /* 520 * Print 1, 5, and 15 minute load averages. 521 */ 522 if (getloadavg(avenrun, sizeof(avenrun) / sizeof(avenrun[0])) == -1) 523 (void)printf(", no load average information available\n"); 524 else { 525 (void)printf(", load averages:"); 526 for (i = 0; i < (sizeof(avenrun) / sizeof(avenrun[0])); i++) { 527 if (i > 0) 528 (void)printf(","); 529 (void)printf(" %.2f", avenrun[i]); 530 } 531 (void)printf("\n"); 532 } 533 } 534 535 #if defined(SUPPORT_UTMP) || defined(SUPPORT_UTMPX) 536 static int 537 ttystat(const char *line, struct stat *st) 538 { 539 char ttybuf[MAXPATHLEN]; 540 541 (void)snprintf(ttybuf, sizeof(ttybuf), "%s%s", _PATH_DEV, line); 542 return stat(ttybuf, st); 543 } 544 545 static void 546 process(struct entry *ep) 547 { 548 struct stat st; 549 time_t touched; 550 int max; 551 552 if ((max = strlen(ep->name)) > maxname) 553 maxname = max; 554 if ((max = strlen(ep->line)) > maxline) 555 maxline = max; 556 if ((max = strlen(ep->host)) > maxhost) 557 maxhost = max; 558 559 ep->tdev = 0; 560 ep->idle = (time_t)-1; 561 562 #ifdef SUPPORT_UTMP 563 /* 564 * Hack to recognize and correctly parse 565 * ut entry made by ftpd. The "tty" used 566 * by ftpd is not a real tty, just identifier in 567 * form ftpPID. Pid parsed from the "tty name" 568 * is used later to match corresponding process. 569 * NB: This is only used for utmp entries. For utmpx, 570 * we already have the pid. 571 */ 572 if (ep->pid == 0 && strncmp(ep->line, "ftp", 3) == 0) { 573 ep->pid = strtol(ep->line + 3, NULL, 10); 574 return; 575 } 576 #endif 577 if (ttystat(ep->line, &st) == -1) 578 return; 579 580 ep->tdev = st.st_rdev; 581 /* 582 * If this is the console device, attempt to ascertain 583 * the true console device dev_t. 584 */ 585 if (ep->tdev == 0) { 586 int mib[2]; 587 size_t size; 588 589 mib[0] = CTL_KERN; 590 mib[1] = KERN_CONSDEV; 591 size = sizeof(dev_t); 592 (void) sysctl(mib, 2, &ep->tdev, &size, NULL, 0); 593 } 594 595 touched = st.st_atime; 596 if (touched < ep->tv.tv_sec) { 597 /* tty untouched since before login */ 598 touched = ep->tv.tv_sec; 599 } 600 if ((ep->idle = now - touched) < 0) 601 ep->idle = 0; 602 } 603 #endif 604 605 static void 606 usage(int wcmd) 607 { 608 609 if (wcmd) 610 (void)fprintf(stderr, 611 "usage: w: [-hin] [-M core] [-N system] [user]\n"); 612 else 613 (void)fprintf(stderr, "uptime\n"); 614 exit(1); 615 } 616
Indexes created Mon Sep 22 05:09:51 GMT 2025