w.c revision 1.50
1 /* $NetBSD: w.c,v 1.50 2002/08/22 14:52:55 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 1.50 2002/08/22 14:52:55 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 #ifdef SUPPORT_FTPD_UTMP 123 pid_t ftpd_pid; /* pid as extracted from ftpd's entry */ 124 #endif 125 } *ep, *ehead = NULL, **nextp = &ehead; 126 127 static void pr_args(struct kinfo_proc2 *); 128 static void pr_header(time_t *, int); 129 #if defined(SUPPORT_UTMP) || defined(SUPPORT_UTMPX) 130 static struct stat *ttystat(char *); 131 static void process(struct entry *); 132 #endif 133 static void usage(int); 134 int main(int, char **); 135 136 int 137 main(int argc, char **argv) 138 { 139 struct kinfo_proc2 *kp; 140 struct hostent *hp; 141 struct in_addr l; 142 int ch, i, nentries, nusers, wcmd; 143 char *memf, *nlistf, *p, *x; 144 time_t then; 145 #ifdef SUPPORT_UTMP 146 struct utmp *ut; 147 #endif 148 #ifdef SUPPORT_UTMPX 149 struct utmpx *utx; 150 #endif 151 const char *progname; 152 char buf[MAXHOSTNAMELEN], errbuf[_POSIX2_LINE_MAX]; 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 = "hiflM:N:nsuw"; 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 'f': case 'l': case 's': case 'u': case 'w': 186 warnx("[-flsuw] no longer supported"); 187 /* FALLTHROUGH */ 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 if (wcmd) { 201 #ifdef SUPPORT_UTMP 202 setutent(); 203 #endif 204 #ifdef SUPPORT_UTMP 205 setutxent(); 206 #endif 207 } 208 209 if (*argv) 210 sel_user = *argv; 211 212 nusers = 0; 213 #ifdef SUPPORT_UTMPX 214 while ((utx = getutxent()) != NULL) { 215 if (utx->ut_type != USER_PROCESS) 216 continue; 217 ++nusers; 218 if (wcmd == 0 || (sel_user && 219 strncmp(utx->ut_name, sel_user, sizeof(utx->ut_name) != 0))) 220 continue; 221 if ((ep = calloc(1, sizeof(struct entry))) == NULL) 222 err(1, NULL); 223 (void)memcpy(ep->name, utx->ut_name, sizeof(utx->ut_name)); 224 (void)memcpy(ep->line, utx->ut_line, sizeof(utx->ut_line)); 225 (void)memcpy(ep->host, utx->ut_host, sizeof(utx->ut_host)); 226 ep->name[sizeof(utx->ut_name)] = '\0'; 227 ep->line[sizeof(utx->ut_line)] = '\0'; 228 ep->host[sizeof(utx->ut_host)] = '\0'; 229 ep->tv = utx->ut_tv; 230 *nextp = ep; 231 nextp = &(ep->next); 232 process(ep); 233 } 234 #endif 235 236 #ifdef SUPPORT_UTMP 237 while ((ut = getutent()) != NULL) { 238 if (ut->ut_name[0] == '\0') 239 continue; 240 if (wcmd == 0 || (sel_user && 241 strncmp(ut->ut_name, sel_user, sizeof(ut->ut_name) != 0))) 242 continue; 243 244 /* Don't process entries that we have utmpx for */ 245 for (ep = ehead; ep != NULL; ep = ep->next) { 246 if (strncmp(ep->line, ut->ut_line, 247 sizeof(ut->ut_line)) == 0) 248 break; 249 } 250 if (ep != NULL) 251 continue; 252 253 ++nusers; 254 if ((ep = calloc(1, sizeof(struct entry))) == NULL) 255 err(1, NULL); 256 (void)memcpy(ep->name, ut->ut_name, sizeof(ut->ut_name)); 257 (void)memcpy(ep->line, ut->ut_line, sizeof(ut->ut_line)); 258 (void)memcpy(ep->host, ut->ut_host, sizeof(ut->ut_host)); 259 ep->name[sizeof(ut->ut_name)] = '\0'; 260 ep->line[sizeof(ut->ut_line)] = '\0'; 261 ep->host[sizeof(ut->ut_host)] = '\0'; 262 ep->tv.tv_sec = ut->ut_time; 263 ep->tv.tv_usec = 0; 264 *nextp = ep; 265 nextp = &(ep->next); 266 process(ep); 267 } 268 #endif 269 270 if (wcmd) { 271 #ifdef SUPPORT_UTMPX 272 endutxent(); 273 #endif 274 #ifdef SUPPORT_UTMP 275 endutent(); 276 #endif 277 } else 278 nusers = 1; 279 280 if (header || wcmd == 0) { 281 pr_header(&now, nusers); 282 if (wcmd == 0) 283 exit (0); 284 } 285 286 if ((kp = kvm_getproc2(kd, KERN_PROC_ALL, 0, 287 sizeof(struct kinfo_proc2), &nentries)) == NULL) 288 errx(1, "%s", kvm_geterr(kd)); 289 290 /* Include trailing space because TTY header starts one column early. */ 291 for (i = 0; i < nentries; i++, kp++) { 292 293 if (kp->p_stat == SIDL || kp->p_stat == SZOMB) 294 continue; 295 296 for (ep = ehead; ep != NULL; ep = ep->next) { 297 if (ep->tdev == kp->p_tdev && 298 kp->p__pgid == kp->p_tpgid) { 299 /* 300 * Proc is in foreground of this terminal 301 */ 302 if (proc_compare(ep->kp, kp)) { 303 ep->kp = kp; 304 } 305 break; 306 } 307 #ifdef SUPPORT_FTPD_UTMP 308 /* 309 * Hack to match process to ftp utmp entry. 310 */ 311 else if (ep->tdev == 0 && kp->p_tdev == NODEV && 312 ep->ftpd_pid == kp->p_pid) { 313 ep->kp = kp; 314 } 315 #endif /* SUPPORT_FTPD_UTMP */ 316 } 317 } 318 319 argwidth = printf("%-*sTTY %-*s %*s IDLE WHAT\n", 320 maxname, "USER", maxhost, "FROM", 321 7 /* "dddhhXm" */, "LOGIN@"); 322 argwidth -= sizeof("WHAT\n") - 1 /* NUL */; 323 324 if ((ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) == -1 && 325 ioctl(STDERR_FILENO, TIOCGWINSZ, &ws) == -1 && 326 ioctl(STDIN_FILENO, TIOCGWINSZ, &ws) == -1) || ws.ws_col == 0) 327 ttywidth = 79; 328 else 329 ttywidth = ws.ws_col - 1; 330 argwidth = ttywidth - argwidth; 331 if (argwidth < 4) 332 argwidth = 8; 333 /* sort by idle time */ 334 if (sortidle && ehead != NULL) { 335 struct entry *from = ehead, *save; 336 337 ehead = NULL; 338 while (from != NULL) { 339 for (nextp = &ehead; 340 (*nextp) && from->idle >= (*nextp)->idle; 341 nextp = &(*nextp)->next) 342 continue; 343 save = from; 344 from = from->next; 345 save->next = *nextp; 346 *nextp = save; 347 } 348 } 349 #if defined(SUPPORT_UTMP) && defined(SUPPORT_UTMPX) 350 else if (ehead != NULL) { 351 struct entry *from = ehead, *save; 352 353 ehead = NULL; 354 while (from != NULL) { 355 for (nextp = &ehead; 356 (*nextp) && strcmp(from->line, (*nextp)->line) > 0; 357 nextp = &(*nextp)->next) 358 continue; 359 save = from; 360 from = from->next; 361 save->next = *nextp; 362 *nextp = save; 363 } 364 } 365 #endif 366 367 if (!nflag) { 368 int rv; 369 370 rv = gethostname(domain, sizeof(domain)); 371 domain[sizeof(domain) - 1] = '\0'; 372 if (rv < 0 || (p = strchr(domain, '.')) == 0) 373 domain[0] = '\0'; 374 else 375 memmove(domain, p, strlen(p) + 1); 376 } 377 378 for (ep = ehead; ep != NULL; ep = ep->next) { 379 char host_buf[MAXHOSTNAMELEN + 1]; 380 381 host_buf[MAXHOSTNAMELEN] = '\0'; 382 strncpy(host_buf, ep->host, MAXHOSTNAMELEN); 383 p = *host_buf ? host_buf : "-"; 384 385 for (x = p; x < p + MAXHOSTNAMELEN; x++) 386 if (*x == '\0' || *x == ':') 387 break; 388 if (x == p + MAXHOSTNAMELEN || *x != ':') 389 x = NULL; 390 else 391 *x++ = '\0'; 392 393 if (!nflag && inet_aton(p, &l) && 394 (hp = gethostbyaddr((char *)&l, sizeof(l), AF_INET))) { 395 if (domain[0] != '\0') { 396 p = hp->h_name; 397 p += strlen(hp->h_name); 398 p -= strlen(domain); 399 if (p > hp->h_name && 400 strcasecmp(p, domain) == 0) 401 *p = '\0'; 402 } 403 p = hp->h_name; 404 } 405 if (x) { 406 (void)snprintf(buf, sizeof(buf), "%s:%s", p, x); 407 p = buf; 408 } 409 if (ep->kp == NULL) { 410 warnx("Stale utmp entry: %s %s %s", 411 ep->name, ep->line, ep->host); 412 continue; 413 } 414 (void)printf("%-*s %-2.2s %-*.*s ", 415 maxname, ep->kp->p_login, 416 (strncmp(ep->line, "tty", 3) && 417 strncmp(ep->line, "dty", 3)) ? 418 ep->line : ep->line + 3, 419 maxhost, maxhost, *p ? p : "-"); 420 then = (time_t)ep->tv.tv_sec; 421 pr_attime(&then, &now); 422 pr_idle(ep->idle); 423 pr_args(ep->kp); 424 (void)printf("\n"); 425 } 426 exit(0); 427 } 428 429 static void 430 pr_args(struct kinfo_proc2 *kp) 431 { 432 char **argv; 433 int left; 434 435 if (kp == 0) 436 goto nothing; 437 left = argwidth; 438 argv = kvm_getargv2(kd, kp, argwidth); 439 if (argv == 0) 440 goto nothing; 441 while (*argv) { 442 fmt_puts(*argv, &left); 443 argv++; 444 fmt_putc(' ', &left); 445 } 446 return; 447 nothing: 448 putchar('-'); 449 } 450 451 static void 452 pr_header(time_t *nowp, int nusers) 453 { 454 double avenrun[3]; 455 time_t uptime; 456 int days, hrs, i, mins; 457 int mib[2]; 458 size_t size; 459 char buf[256]; 460 461 /* 462 * Print time of day. 463 * 464 * SCCS forces the string manipulation below, as it replaces 465 * %, M, and % in a character string with the file name. 466 */ 467 (void)strftime(buf, sizeof(buf), "%l:%" "M%p", localtime(nowp)); 468 buf[sizeof(buf) - 1] = '\0'; 469 (void)printf("%s ", buf); 470 471 /* 472 * Print how long system has been up. 473 * (Found by looking getting "boottime" from the kernel) 474 */ 475 mib[0] = CTL_KERN; 476 mib[1] = KERN_BOOTTIME; 477 size = sizeof(boottime); 478 if (sysctl(mib, 2, &boottime, &size, NULL, 0) != -1 && 479 boottime.tv_sec != 0) { 480 uptime = now - boottime.tv_sec; 481 uptime += 30; 482 if (uptime > SECSPERMIN) { 483 days = uptime / SECSPERDAY; 484 uptime %= SECSPERDAY; 485 hrs = uptime / SECSPERHOUR; 486 uptime %= SECSPERHOUR; 487 mins = uptime / SECSPERMIN; 488 (void)printf(" up"); 489 if (days > 0) 490 (void)printf(" %d day%s,", days, 491 days > 1 ? "s" : ""); 492 if (hrs > 0 && mins > 0) 493 (void)printf(" %2d:%02d,", hrs, mins); 494 else { 495 if (hrs > 0) 496 (void)printf(" %d hr%s,", 497 hrs, hrs > 1 ? "s" : ""); 498 if (mins > 0) 499 (void)printf(" %d min%s,", 500 mins, mins > 1 ? "s" : ""); 501 } 502 } 503 } 504 505 /* Print number of users logged in to system */ 506 (void)printf(" %d user%s", nusers, nusers != 1 ? "s" : ""); 507 508 /* 509 * Print 1, 5, and 15 minute load averages. 510 */ 511 if (getloadavg(avenrun, sizeof(avenrun) / sizeof(avenrun[0])) == -1) 512 (void)printf(", no load average information available\n"); 513 else { 514 (void)printf(", load averages:"); 515 for (i = 0; i < (sizeof(avenrun) / sizeof(avenrun[0])); i++) { 516 if (i > 0) 517 (void)printf(","); 518 (void)printf(" %.2f", avenrun[i]); 519 } 520 (void)printf("\n"); 521 } 522 } 523 524 #if defined(SUPPORT_UTMP) || defined(SUPPORT_UTMPX) 525 static struct stat * 526 ttystat(char *line) 527 { 528 static struct stat sb; 529 char ttybuf[MAXPATHLEN]; 530 531 (void)snprintf(ttybuf, sizeof(ttybuf), "%s%s", _PATH_DEV, line); 532 if (stat(ttybuf, &sb)) 533 return (NULL); 534 return (&sb); 535 } 536 537 static void 538 process(struct entry *ep) 539 { 540 struct stat *stp; 541 time_t touched; 542 int max; 543 544 if ((max = strlen(ep->name)) > maxname) 545 maxname = max; 546 if ((max = strlen(ep->line)) > maxline) 547 maxline = max; 548 if ((max = strlen(ep->host)) > maxhost) 549 maxhost = max; 550 551 if ((stp = ttystat(ep->line)) == NULL) 552 return; 553 554 #ifdef SUPPORT_FTPD_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 */ 562 if (strncmp(ep->line, "ftp", 3) == 0) { 563 ep->ftpd_pid = strtol(ep->line + 3, NULL, 10); 564 565 return; 566 } 567 #endif /* SUPPORT_FTPD_UTMP */ 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 Wed Sep 24 05:09:52 GMT 2025