w.c revision 1.51
1 /* $NetBSD: w.c,v 1.51 2002/09/16 01:49:06 mycroft 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 1.51 2002/09/16 01:49:06 mycroft 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); 200 201 #ifdef SUPPORT_UTMPX 202 setutxent(); 203 #endif 204 #ifdef SUPPORT_UTMP 205 setutent(); 206 #endif 207 208 if (*argv) 209 sel_user = *argv; 210 211 nusers = 0; 212 #ifdef SUPPORT_UTMPX 213 while ((utx = getutxent()) != NULL) { 214 if (utx->ut_type != USER_PROCESS) 215 continue; 216 ++nusers; 217 if (wcmd == 0 || (sel_user && 218 strncmp(utx->ut_name, sel_user, sizeof(utx->ut_name) != 0))) 219 continue; 220 if ((ep = calloc(1, sizeof(struct entry))) == NULL) 221 err(1, NULL); 222 (void)memcpy(ep->name, utx->ut_name, sizeof(utx->ut_name)); 223 (void)memcpy(ep->line, utx->ut_line, sizeof(utx->ut_line)); 224 (void)memcpy(ep->host, utx->ut_host, sizeof(utx->ut_host)); 225 ep->name[sizeof(utx->ut_name)] = '\0'; 226 ep->line[sizeof(utx->ut_line)] = '\0'; 227 ep->host[sizeof(utx->ut_host)] = '\0'; 228 ep->tv = utx->ut_tv; 229 *nextp = ep; 230 nextp = &(ep->next); 231 process(ep); 232 } 233 #endif 234 235 #ifdef SUPPORT_UTMP 236 while ((ut = getutent()) != NULL) { 237 if (ut->ut_name[0] == '\0') 238 continue; 239 if (wcmd == 0 || (sel_user && 240 strncmp(ut->ut_name, sel_user, sizeof(ut->ut_name) != 0))) 241 continue; 242 243 /* Don't process entries that we have utmpx for */ 244 for (ep = ehead; ep != NULL; ep = ep->next) { 245 if (strncmp(ep->line, ut->ut_line, 246 sizeof(ut->ut_line)) == 0) 247 break; 248 } 249 if (ep != NULL) 250 continue; 251 252 ++nusers; 253 if ((ep = calloc(1, sizeof(struct entry))) == NULL) 254 err(1, NULL); 255 (void)memcpy(ep->name, ut->ut_name, sizeof(ut->ut_name)); 256 (void)memcpy(ep->line, ut->ut_line, sizeof(ut->ut_line)); 257 (void)memcpy(ep->host, ut->ut_host, sizeof(ut->ut_host)); 258 ep->name[sizeof(ut->ut_name)] = '\0'; 259 ep->line[sizeof(ut->ut_line)] = '\0'; 260 ep->host[sizeof(ut->ut_host)] = '\0'; 261 ep->tv.tv_sec = ut->ut_time; 262 ep->tv.tv_usec = 0; 263 *nextp = ep; 264 nextp = &(ep->next); 265 process(ep); 266 } 267 #endif 268 269 #ifdef SUPPORT_UTMPX 270 endutxent(); 271 #endif 272 #ifdef SUPPORT_UTMP 273 endutent(); 274 #endif 275 276 if (header || wcmd == 0) { 277 pr_header(&now, nusers); 278 if (wcmd == 0) 279 exit (0); 280 } 281 282 if ((kp = kvm_getproc2(kd, KERN_PROC_ALL, 0, 283 sizeof(struct kinfo_proc2), &nentries)) == NULL) 284 errx(1, "%s", kvm_geterr(kd)); 285 286 /* Include trailing space because TTY header starts one column early. */ 287 for (i = 0; i < nentries; i++, kp++) { 288 289 if (kp->p_stat == SIDL || kp->p_stat == SZOMB) 290 continue; 291 292 for (ep = ehead; ep != NULL; ep = ep->next) { 293 if (ep->tdev == kp->p_tdev && 294 kp->p__pgid == kp->p_tpgid) { 295 /* 296 * Proc is in foreground of this terminal 297 */ 298 if (proc_compare(ep->kp, kp)) { 299 ep->kp = kp; 300 } 301 break; 302 } 303 #ifdef SUPPORT_FTPD_UTMP 304 /* 305 * Hack to match process to ftp utmp entry. 306 */ 307 else if (ep->tdev == 0 && kp->p_tdev == NODEV && 308 ep->ftpd_pid == kp->p_pid) { 309 ep->kp = kp; 310 } 311 #endif /* SUPPORT_FTPD_UTMP */ 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 host_buf[MAXHOSTNAMELEN] = '\0'; 378 strncpy(host_buf, ep->host, MAXHOSTNAMELEN); 379 p = *host_buf ? host_buf : "-"; 380 381 for (x = p; x < p + MAXHOSTNAMELEN; x++) 382 if (*x == '\0' || *x == ':') 383 break; 384 if (x == p + MAXHOSTNAMELEN || *x != ':') 385 x = NULL; 386 else 387 *x++ = '\0'; 388 389 if (!nflag && inet_aton(p, &l) && 390 (hp = gethostbyaddr((char *)&l, sizeof(l), AF_INET))) { 391 if (domain[0] != '\0') { 392 p = hp->h_name; 393 p += strlen(hp->h_name); 394 p -= strlen(domain); 395 if (p > hp->h_name && 396 strcasecmp(p, domain) == 0) 397 *p = '\0'; 398 } 399 p = hp->h_name; 400 } 401 if (x) { 402 (void)snprintf(buf, sizeof(buf), "%s:%s", p, x); 403 p = buf; 404 } 405 if (ep->kp == NULL) { 406 warnx("Stale utmp entry: %s %s %s", 407 ep->name, ep->line, ep->host); 408 continue; 409 } 410 (void)printf("%-*s %-2.2s %-*.*s ", 411 maxname, ep->kp->p_login, 412 (strncmp(ep->line, "tty", 3) && 413 strncmp(ep->line, "dty", 3)) ? 414 ep->line : ep->line + 3, 415 maxhost, maxhost, *p ? p : "-"); 416 then = (time_t)ep->tv.tv_sec; 417 pr_attime(&then, &now); 418 pr_idle(ep->idle); 419 pr_args(ep->kp); 420 (void)printf("\n"); 421 } 422 exit(0); 423 } 424 425 static void 426 pr_args(struct kinfo_proc2 *kp) 427 { 428 char **argv; 429 int left; 430 431 if (kp == 0) 432 goto nothing; 433 left = argwidth; 434 argv = kvm_getargv2(kd, kp, argwidth); 435 if (argv == 0) 436 goto nothing; 437 while (*argv) { 438 fmt_puts(*argv, &left); 439 argv++; 440 fmt_putc(' ', &left); 441 } 442 return; 443 nothing: 444 putchar('-'); 445 } 446 447 static void 448 pr_header(time_t *nowp, int nusers) 449 { 450 double avenrun[3]; 451 time_t uptime; 452 int days, hrs, i, mins; 453 int mib[2]; 454 size_t size; 455 char buf[256]; 456 457 /* 458 * Print time of day. 459 * 460 * SCCS forces the string manipulation below, as it replaces 461 * %, M, and % in a character string with the file name. 462 */ 463 (void)strftime(buf, sizeof(buf), "%l:%" "M%p", localtime(nowp)); 464 buf[sizeof(buf) - 1] = '\0'; 465 (void)printf("%s ", buf); 466 467 /* 468 * Print how long system has been up. 469 * (Found by looking getting "boottime" from the kernel) 470 */ 471 mib[0] = CTL_KERN; 472 mib[1] = KERN_BOOTTIME; 473 size = sizeof(boottime); 474 if (sysctl(mib, 2, &boottime, &size, NULL, 0) != -1 && 475 boottime.tv_sec != 0) { 476 uptime = now - boottime.tv_sec; 477 uptime += 30; 478 if (uptime > SECSPERMIN) { 479 days = uptime / SECSPERDAY; 480 uptime %= SECSPERDAY; 481 hrs = uptime / SECSPERHOUR; 482 uptime %= SECSPERHOUR; 483 mins = uptime / SECSPERMIN; 484 (void)printf(" up"); 485 if (days > 0) 486 (void)printf(" %d day%s,", days, 487 days > 1 ? "s" : ""); 488 if (hrs > 0 && mins > 0) 489 (void)printf(" %2d:%02d,", hrs, mins); 490 else { 491 if (hrs > 0) 492 (void)printf(" %d hr%s,", 493 hrs, hrs > 1 ? "s" : ""); 494 if (mins > 0) 495 (void)printf(" %d min%s,", 496 mins, mins > 1 ? "s" : ""); 497 } 498 } 499 } 500 501 /* Print number of users logged in to system */ 502 (void)printf(" %d user%s", nusers, nusers != 1 ? "s" : ""); 503 504 /* 505 * Print 1, 5, and 15 minute load averages. 506 */ 507 if (getloadavg(avenrun, sizeof(avenrun) / sizeof(avenrun[0])) == -1) 508 (void)printf(", no load average information available\n"); 509 else { 510 (void)printf(", load averages:"); 511 for (i = 0; i < (sizeof(avenrun) / sizeof(avenrun[0])); i++) { 512 if (i > 0) 513 (void)printf(","); 514 (void)printf(" %.2f", avenrun[i]); 515 } 516 (void)printf("\n"); 517 } 518 } 519 520 #if defined(SUPPORT_UTMP) || defined(SUPPORT_UTMPX) 521 static struct stat * 522 ttystat(char *line) 523 { 524 static struct stat sb; 525 char ttybuf[MAXPATHLEN]; 526 527 (void)snprintf(ttybuf, sizeof(ttybuf), "%s%s", _PATH_DEV, line); 528 if (stat(ttybuf, &sb)) 529 return (NULL); 530 return (&sb); 531 } 532 533 static void 534 process(struct entry *ep) 535 { 536 struct stat *stp; 537 time_t touched; 538 int max; 539 540 if ((max = strlen(ep->name)) > maxname) 541 maxname = max; 542 if ((max = strlen(ep->line)) > maxline) 543 maxline = max; 544 if ((max = strlen(ep->host)) > maxhost) 545 maxhost = max; 546 547 if ((stp = ttystat(ep->line)) == NULL) 548 return; 549 550 #ifdef SUPPORT_FTPD_UTMP 551 /* 552 * Hack to recognize and correctly parse 553 * ut entry made by ftpd. The "tty" used 554 * by ftpd is not a real tty, just identifier in 555 * form ftpSUPPORT_ID. Pid parsed from the "tty name" 556 * is used later to match corresponding process. 557 */ 558 if (strncmp(ep->line, "ftp", 3) == 0) { 559 ep->ftpd_pid = strtol(ep->line + 3, NULL, 10); 560 561 return; 562 } 563 #endif /* SUPPORT_FTPD_UTMP */ 564 565 ep->tdev = stp->st_rdev; 566 /* 567 * If this is the console device, attempt to ascertain 568 * the true console device dev_t. 569 */ 570 if (ep->tdev == 0) { 571 int mib[2]; 572 size_t size; 573 574 mib[0] = CTL_KERN; 575 mib[1] = KERN_CONSDEV; 576 size = sizeof(dev_t); 577 (void) sysctl(mib, 2, &ep->tdev, &size, NULL, 0); 578 } 579 580 touched = stp->st_atime; 581 if (touched < ep->tv.tv_sec) { 582 /* tty untouched since before login */ 583 touched = ep->tv.tv_sec; 584 } 585 if ((ep->idle = now - touched) < 0) 586 ep->idle = 0; 587 } 588 #endif 589 590 static void 591 usage(int wcmd) 592 { 593 594 if (wcmd) 595 (void)fprintf(stderr, 596 "usage: w: [-hin] [-M core] [-N system] [user]\n"); 597 else 598 (void)fprintf(stderr, "uptime\n"); 599 exit(1); 600 } 601
Indexes created Sun Sep 21 20:09:37 GMT 2025