w.c revision 1.55
1 /* $NetBSD: w.c,v 1.55 2003/02/26 15:01:09 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. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #include <sys/cdefs.h> 37 #ifndef lint 38 __COPYRIGHT("@(#) Copyright (c) 1980, 1991, 1993, 1994\n\ 39 The Regents of the University of California. All rights reserved.\n"); 40 #endif /* not lint */ 41 42 #ifndef lint 43 #if 0 44 static char sccsid[] = "@(#)w.c 8.6 (Berkeley) 6/30/94"; 45 #else 46 __RCSID("$NetBSD: w.c,v 1.55 2003/02/26 15:01:09 christos Exp $"); 47 #endif 48 #endif /* not lint */ 49 50 /* 51 * w - print system status (who and what) 52 * 53 * This program is similar to the systat command on Tenex/Tops 10/20 54 * 55 */ 56 #include <sys/param.h> 57 #include <sys/types.h> 58 #include <sys/time.h> 59 #include <sys/stat.h> 60 #include <sys/sysctl.h> 61 #include <sys/proc.h> 62 #include <sys/user.h> 63 #include <sys/ioctl.h> 64 #include <sys/socket.h> 65 66 #include <netinet/in.h> 67 #include <arpa/inet.h> 68 69 #include <ctype.h> 70 #include <err.h> 71 #include <errno.h> 72 #include <fcntl.h> 73 #include <kvm.h> 74 #include <limits.h> 75 #include <netdb.h> 76 #include <nlist.h> 77 #include <paths.h> 78 #include <stdio.h> 79 #include <stdlib.h> 80 #include <string.h> 81 #include <time.h> 82 #include <tzfile.h> 83 #include <unistd.h> 84 #ifdef SUPPORT_UTMP 85 #include <utmp.h> 86 #endif 87 #ifdef SUPPORT_UTMPX 88 #include <utmpx.h> 89 #endif 90 #include <vis.h> 91 92 #include "extern.h" 93 94 #define max(a,b) (((a)>(b))?(a):(b)) 95 96 struct timeval boottime; 97 struct winsize ws; 98 kvm_t *kd; 99 time_t now; /* the current time of day */ 100 time_t uptime; /* time of last reboot & elapsed time since */ 101 int ttywidth; /* width of tty */ 102 int argwidth; /* width of tty left to print process args */ 103 int header = 1; /* true if -h flag: don't print heading */ 104 int nflag; /* true if -n flag: don't convert addrs */ 105 int sortidle; /* sort bu idle time */ 106 char *sel_user; /* login of particular user selected */ 107 char domain[MAXHOSTNAMELEN + 1]; 108 int maxname = 8, maxline = 3, maxhost = 16; 109 110 /* 111 * One of these per active utmp entry. 112 */ 113 struct entry { 114 struct entry *next; 115 char name[65]; 116 char line[65]; 117 char host[257]; 118 struct timeval tv; 119 dev_t tdev; /* dev_t of terminal */ 120 time_t idle; /* idle time of terminal in seconds */ 121 struct kinfo_proc2 *kp; /* `most interesting' proc */ 122 pid_t pid; /* pid or ~0 if not known */ 123 } *ep, *ehead = NULL, **nextp = &ehead; 124 125 static void pr_args(struct kinfo_proc2 *); 126 static void pr_header(time_t *, int); 127 #if defined(SUPPORT_UTMP) || defined(SUPPORT_UTMPX) 128 static struct stat *ttystat(char *); 129 static void process(struct entry *); 130 #endif 131 static void usage(int); 132 int main(int, char **); 133 134 int 135 main(int argc, char **argv) 136 { 137 struct kinfo_proc2 *kp; 138 struct hostent *hp; 139 struct in_addr l; 140 int ch, i, nentries, nusers, wcmd; 141 char *memf, *nlistf, *p, *x; 142 time_t then; 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 = "hiflM:N:nsuw"; 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 'f': case 'l': case 's': case 'u': case 'w': 184 warnx("[-flsuw] no longer supported"); 185 /* FALLTHROUGH */ 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->tv = utx->ut_tv; 232 ep->pid = utx->ut_pid; 233 *nextp = ep; 234 nextp = &(ep->next); 235 if (wcmd != 0) 236 process(ep); 237 } 238 #endif 239 240 #ifdef SUPPORT_UTMP 241 while ((ut = getutent()) != NULL) { 242 if (ut->ut_name[0] == '\0') 243 continue; 244 245 if (sel_user && 246 strncmp(ut->ut_name, sel_user, sizeof(ut->ut_name) != 0)) 247 continue; 248 249 /* Don't process entries that we have utmpx for */ 250 for (ep = ehead; ep != NULL; ep = ep->next) { 251 if (strncmp(ep->line, ut->ut_line, 252 sizeof(ut->ut_line)) == 0) 253 break; 254 } 255 if (ep != NULL) 256 continue; 257 258 ++nusers; 259 if ((ep = calloc(1, sizeof(struct entry))) == NULL) 260 err(1, NULL); 261 (void)memcpy(ep->name, ut->ut_name, sizeof(ut->ut_name)); 262 (void)memcpy(ep->line, ut->ut_line, sizeof(ut->ut_line)); 263 (void)memcpy(ep->host, ut->ut_host, sizeof(ut->ut_host)); 264 ep->name[sizeof(ut->ut_name)] = '\0'; 265 ep->line[sizeof(ut->ut_line)] = '\0'; 266 ep->host[sizeof(ut->ut_host)] = '\0'; 267 ep->tv.tv_sec = ut->ut_time; 268 *nextp = ep; 269 nextp = &(ep->next); 270 if (wcmd != 0) 271 process(ep); 272 } 273 #endif 274 275 #ifdef SUPPORT_UTMPX 276 endutxent(); 277 #endif 278 #ifdef SUPPORT_UTMP 279 endutent(); 280 #endif 281 282 if (header || wcmd == 0) { 283 pr_header(&now, nusers); 284 if (wcmd == 0) 285 exit (0); 286 } 287 288 if ((kp = kvm_getproc2(kd, KERN_PROC_ALL, 0, 289 sizeof(struct kinfo_proc2), &nentries)) == NULL) 290 errx(1, "%s", kvm_geterr(kd)); 291 292 /* Include trailing space because TTY header starts one column early. */ 293 for (i = 0; i < nentries; i++, kp++) { 294 295 if (kp->p_stat == SIDL || kp->p_stat == SZOMB) 296 continue; 297 298 for (ep = ehead; ep != NULL; ep = ep->next) { 299 if (ep->tdev != 0) { 300 if (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->kp, kp)) { 307 ep->kp = kp; 308 } 309 break; 310 } 311 } else if (ep->pid != 0 && ep->pid == kp->p_pid) { 312 ep->kp = kp; 313 break; 314 } 315 } 316 } 317 318 argwidth = printf("%-*sTTY %-*s %*s IDLE WHAT\n", 319 maxname, "USER", maxhost, "FROM", 320 7 /* "dddhhXm" */, "LOGIN@"); 321 argwidth -= sizeof("WHAT\n") - 1 /* NUL */; 322 323 if ((ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) == -1 && 324 ioctl(STDERR_FILENO, TIOCGWINSZ, &ws) == -1 && 325 ioctl(STDIN_FILENO, TIOCGWINSZ, &ws) == -1) || ws.ws_col == 0) 326 ttywidth = 79; 327 else 328 ttywidth = ws.ws_col - 1; 329 argwidth = ttywidth - argwidth; 330 if (argwidth < 4) 331 argwidth = 8; 332 /* sort by idle time */ 333 if (sortidle && ehead != NULL) { 334 struct entry *from = ehead, *save; 335 336 ehead = NULL; 337 while (from != NULL) { 338 for (nextp = &ehead; 339 (*nextp) && from->idle >= (*nextp)->idle; 340 nextp = &(*nextp)->next) 341 continue; 342 save = from; 343 from = from->next; 344 save->next = *nextp; 345 *nextp = save; 346 } 347 } 348 #if defined(SUPPORT_UTMP) && defined(SUPPORT_UTMPX) 349 else if (ehead != NULL) { 350 struct entry *from = ehead, *save; 351 352 ehead = NULL; 353 while (from != NULL) { 354 for (nextp = &ehead; 355 (*nextp) && strcmp(from->line, (*nextp)->line) > 0; 356 nextp = &(*nextp)->next) 357 continue; 358 save = from; 359 from = from->next; 360 save->next = *nextp; 361 *nextp = save; 362 } 363 } 364 #endif 365 366 if (!nflag) { 367 int rv; 368 369 rv = gethostname(domain, sizeof(domain)); 370 domain[sizeof(domain) - 1] = '\0'; 371 if (rv < 0 || (p = strchr(domain, '.')) == 0) 372 domain[0] = '\0'; 373 else 374 memmove(domain, p, strlen(p) + 1); 375 } 376 377 for (ep = ehead; ep != NULL; ep = ep->next) { 378 char host_buf[MAXHOSTNAMELEN + 1]; 379 380 host_buf[MAXHOSTNAMELEN] = '\0'; 381 strncpy(host_buf, ep->host, MAXHOSTNAMELEN); 382 p = *host_buf ? host_buf : "-"; 383 384 for (x = p; x < p + MAXHOSTNAMELEN; x++) 385 if (*x == '\0' || *x == ':') 386 break; 387 if (x == p + MAXHOSTNAMELEN || *x != ':') 388 x = NULL; 389 else 390 *x++ = '\0'; 391 392 if (!nflag && inet_aton(p, &l) && 393 (hp = gethostbyaddr((char *)&l, sizeof(l), AF_INET))) { 394 if (domain[0] != '\0') { 395 p = hp->h_name; 396 p += strlen(hp->h_name); 397 p -= strlen(domain); 398 if (p > hp->h_name && 399 strcasecmp(p, domain) == 0) 400 *p = '\0'; 401 } 402 p = hp->h_name; 403 } 404 if (x) { 405 (void)snprintf(buf, sizeof(buf), "%s:%s", p, x); 406 p = buf; 407 } 408 if (ep->kp == NULL) { 409 warnx("Stale utmp entry: %s %s %s", 410 ep->name, ep->line, ep->host); 411 continue; 412 } 413 (void)printf("%-*s %-2.2s %-*.*s ", 414 maxname, ep->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(ep->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 goto nothing; 440 while (*argv) { 441 fmt_puts(*argv, &left); 442 argv++; 443 fmt_putc(' ', &left); 444 } 445 return; 446 nothing: 447 putchar('-'); 448 } 449 450 static void 451 pr_header(time_t *nowp, int nusers) 452 { 453 double avenrun[3]; 454 time_t uptime; 455 int days, hrs, i, mins; 456 int mib[2]; 457 size_t size; 458 char buf[256]; 459 460 /* 461 * Print time of day. 462 * 463 * SCCS forces the string manipulation below, as it replaces 464 * %, M, and % in a character string with the file name. 465 */ 466 (void)strftime(buf, sizeof(buf), "%l:%" "M%p", localtime(nowp)); 467 buf[sizeof(buf) - 1] = '\0'; 468 (void)printf("%s ", buf); 469 470 /* 471 * Print how long system has been up. 472 * (Found by looking getting "boottime" from the kernel) 473 */ 474 mib[0] = CTL_KERN; 475 mib[1] = KERN_BOOTTIME; 476 size = sizeof(boottime); 477 if (sysctl(mib, 2, &boottime, &size, NULL, 0) != -1 && 478 boottime.tv_sec != 0) { 479 uptime = now - boottime.tv_sec; 480 uptime += 30; 481 if (uptime > SECSPERMIN) { 482 days = uptime / SECSPERDAY; 483 uptime %= SECSPERDAY; 484 hrs = uptime / SECSPERHOUR; 485 uptime %= SECSPERHOUR; 486 mins = uptime / SECSPERMIN; 487 (void)printf(" up"); 488 if (days > 0) 489 (void)printf(" %d day%s,", days, 490 days > 1 ? "s" : ""); 491 if (hrs > 0 && mins > 0) 492 (void)printf(" %2d:%02d,", hrs, mins); 493 else { 494 if (hrs > 0) 495 (void)printf(" %d hr%s,", 496 hrs, hrs > 1 ? "s" : ""); 497 if (mins > 0) 498 (void)printf(" %d min%s,", 499 mins, mins > 1 ? "s" : ""); 500 } 501 } 502 } 503 504 /* Print number of users logged in to system */ 505 (void)printf(" %d user%s", nusers, nusers != 1 ? "s" : ""); 506 507 /* 508 * Print 1, 5, and 15 minute load averages. 509 */ 510 if (getloadavg(avenrun, sizeof(avenrun) / sizeof(avenrun[0])) == -1) 511 (void)printf(", no load average information available\n"); 512 else { 513 (void)printf(", load averages:"); 514 for (i = 0; i < (sizeof(avenrun) / sizeof(avenrun[0])); i++) { 515 if (i > 0) 516 (void)printf(","); 517 (void)printf(" %.2f", avenrun[i]); 518 } 519 (void)printf("\n"); 520 } 521 } 522 523 #if defined(SUPPORT_UTMP) || defined(SUPPORT_UTMPX) 524 static struct stat * 525 ttystat(char *line) 526 { 527 static struct stat sb; 528 char ttybuf[MAXPATHLEN]; 529 530 (void)snprintf(ttybuf, sizeof(ttybuf), "%s%s", _PATH_DEV, line); 531 if (stat(ttybuf, &sb)) 532 return (NULL); 533 return (&sb); 534 } 535 536 static void 537 process(struct entry *ep) 538 { 539 struct stat *stp; 540 time_t touched; 541 int max; 542 543 if ((max = strlen(ep->name)) > maxname) 544 maxname = max; 545 if ((max = strlen(ep->line)) > maxline) 546 maxline = max; 547 if ((max = strlen(ep->host)) > maxhost) 548 maxhost = max; 549 550 551 #ifdef SUPPORT_UTMP 552 /* 553 * Hack to recognize and correctly parse 554 * ut entry made by ftpd. The "tty" used 555 * by ftpd is not a real tty, just identifier in 556 * form ftpSUPPORT_ID. Pid parsed from the "tty name" 557 * is used later to match corresponding process. 558 * NB: This is only used for utmp entries. For utmpx, 559 * we already have the pid. 560 */ 561 if (ep->pid == 0 && strncmp(ep->line, "ftp", 3) == 0) { 562 ep->pid = strtol(ep->line + 3, NULL, 10); 563 return; 564 } 565 #endif 566 if ((stp = ttystat(ep->line)) == NULL) 567 return; 568 569 ep->tdev = stp->st_rdev; 570 /* 571 * If this is the console device, attempt to ascertain 572 * the true console device dev_t. 573 */ 574 if (ep->tdev == 0) { 575 int mib[2]; 576 size_t size; 577 578 mib[0] = CTL_KERN; 579 mib[1] = KERN_CONSDEV; 580 size = sizeof(dev_t); 581 (void) sysctl(mib, 2, &ep->tdev, &size, NULL, 0); 582 } 583 584 touched = stp->st_atime; 585 if (touched < ep->tv.tv_sec) { 586 /* tty untouched since before login */ 587 touched = ep->tv.tv_sec; 588 } 589 if ((ep->idle = now - touched) < 0) 590 ep->idle = 0; 591 } 592 #endif 593 594 static void 595 usage(int wcmd) 596 { 597 598 if (wcmd) 599 (void)fprintf(stderr, 600 "usage: w: [-hin] [-M core] [-N system] [user]\n"); 601 else 602 (void)fprintf(stderr, "uptime\n"); 603 exit(1); 604 } 605
Indexes created Tue Sep 23 13:09:54 GMT 2025