w.c revision 1.58
1 /* $NetBSD: w.c,v 1.58 2003/02/26 19:10:28 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 1.58 2003/02/26 19:10:28 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 char type[2]; 119 struct timeval tv; 120 dev_t tdev; /* dev_t of terminal */ 121 time_t idle; /* idle time of terminal in seconds */ 122 struct kinfo_proc2 *tp; /* `most interesting' tty proc */ 123 struct kinfo_proc2 *pp; /* pid proc */ 124 pid_t pid; /* pid or ~0 if not known */ 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 (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 ep->name[sizeof(utx->ut_name)] = '\0'; 225 ep->line[sizeof(utx->ut_line)] = '\0'; 226 if (!nflag || getnameinfo((struct sockaddr *)&utx->ut_ss, 227 utx->ut_ss.ss_len, ep->host, sizeof(ep->host), NULL, 0, 228 NI_NUMERICHOST) != 0) { 229 (void)memcpy(ep->host, utx->ut_host, 230 sizeof(utx->ut_host)); 231 ep->host[sizeof(utx->ut_host)] = '\0'; 232 } 233 ep->type[0] = 'x'; 234 ep->tv = utx->ut_tv; 235 ep->pid = utx->ut_pid; 236 *nextp = ep; 237 nextp = &(ep->next); 238 if (wcmd != 0) 239 process(ep); 240 } 241 #endif 242 243 #ifdef SUPPORT_UTMP 244 while ((ut = getutent()) != NULL) { 245 if (ut->ut_name[0] == '\0') 246 continue; 247 248 if (sel_user && 249 strncmp(ut->ut_name, sel_user, sizeof(ut->ut_name) != 0)) 250 continue; 251 252 /* Don't process entries that we have utmpx for */ 253 for (ep = ehead; ep != NULL; ep = ep->next) { 254 if (strncmp(ep->line, ut->ut_line, 255 sizeof(ut->ut_line)) == 0) 256 break; 257 } 258 if (ep != NULL) 259 continue; 260 261 ++nusers; 262 if ((ep = calloc(1, sizeof(struct entry))) == NULL) 263 err(1, NULL); 264 (void)memcpy(ep->name, ut->ut_name, sizeof(ut->ut_name)); 265 (void)memcpy(ep->line, ut->ut_line, sizeof(ut->ut_line)); 266 (void)memcpy(ep->host, ut->ut_host, sizeof(ut->ut_host)); 267 ep->name[sizeof(ut->ut_name)] = '\0'; 268 ep->line[sizeof(ut->ut_line)] = '\0'; 269 ep->host[sizeof(ut->ut_host)] = '\0'; 270 ep->tv.tv_sec = ut->ut_time; 271 *nextp = ep; 272 nextp = &(ep->next); 273 if (wcmd != 0) 274 process(ep); 275 } 276 #endif 277 278 #ifdef SUPPORT_UTMPX 279 endutxent(); 280 #endif 281 #ifdef SUPPORT_UTMP 282 endutent(); 283 #endif 284 285 if (header || wcmd == 0) { 286 pr_header(&now, nusers); 287 if (wcmd == 0) 288 exit (0); 289 } 290 291 if ((kp = kvm_getproc2(kd, KERN_PROC_ALL, 0, 292 sizeof(struct kinfo_proc2), &nentries)) == NULL) 293 errx(1, "%s", kvm_geterr(kd)); 294 295 /* Include trailing space because TTY header starts one column early. */ 296 for (i = 0; i < nentries; i++, kp++) { 297 298 if (kp->p_stat == SIDL || kp->p_stat == SZOMB) 299 continue; 300 301 for (ep = ehead; ep != NULL; ep = ep->next) { 302 if (ep->tdev != 0 && ep->tdev == kp->p_tdev && 303 kp->p__pgid == kp->p_tpgid) { 304 /* 305 * Proc is in foreground of this 306 * terminal 307 */ 308 if (proc_compare(ep->tp, kp)) 309 ep->tp = kp; 310 break; 311 } 312 if (ep->pid != 0 && ep->pid == kp->p_pid) { 313 ep->pp = kp; 314 break; 315 } 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->tp != NULL) 410 kp = ep->tp; 411 else if (ep->pp != NULL) 412 kp = ep->pp; 413 else { 414 warnx("Stale utmp%s entry: %s %s %s", 415 ep->type, ep->name, ep->line, ep->host); 416 continue; 417 } 418 (void)printf("%-*s %-2.2s %-*.*s ", 419 maxname, kp->p_login, 420 (strncmp(ep->line, "tty", 3) && 421 strncmp(ep->line, "dty", 3)) ? 422 ep->line : ep->line + 3, 423 maxhost, maxhost, *p ? p : "-"); 424 then = (time_t)ep->tv.tv_sec; 425 pr_attime(&then, &now); 426 pr_idle(ep->idle); 427 pr_args(kp); 428 (void)printf("\n"); 429 } 430 exit(0); 431 } 432 433 static void 434 pr_args(struct kinfo_proc2 *kp) 435 { 436 char **argv; 437 int left; 438 439 if (kp == 0) 440 goto nothing; 441 left = argwidth; 442 argv = kvm_getargv2(kd, kp, argwidth); 443 if (argv == 0) { 444 if (kp->p_comm == 0) { 445 goto nothing; 446 } else { 447 fmt_putc('(', &left); 448 fmt_puts((char *)kp->p_comm, &left); 449 fmt_putc(')', &left); 450 return; 451 } 452 } 453 while (*argv) { 454 fmt_puts(*argv, &left); 455 argv++; 456 fmt_putc(' ', &left); 457 } 458 return; 459 nothing: 460 putchar('-'); 461 } 462 463 static void 464 pr_header(time_t *nowp, int nusers) 465 { 466 double avenrun[3]; 467 time_t uptime; 468 int days, hrs, i, mins; 469 int mib[2]; 470 size_t size; 471 char buf[256]; 472 473 /* 474 * Print time of day. 475 * 476 * SCCS forces the string manipulation below, as it replaces 477 * %, M, and % in a character string with the file name. 478 */ 479 (void)strftime(buf, sizeof(buf), "%l:%" "M%p", localtime(nowp)); 480 buf[sizeof(buf) - 1] = '\0'; 481 (void)printf("%s ", buf); 482 483 /* 484 * Print how long system has been up. 485 * (Found by looking getting "boottime" from the kernel) 486 */ 487 mib[0] = CTL_KERN; 488 mib[1] = KERN_BOOTTIME; 489 size = sizeof(boottime); 490 if (sysctl(mib, 2, &boottime, &size, NULL, 0) != -1 && 491 boottime.tv_sec != 0) { 492 uptime = now - boottime.tv_sec; 493 uptime += 30; 494 if (uptime > SECSPERMIN) { 495 days = uptime / SECSPERDAY; 496 uptime %= SECSPERDAY; 497 hrs = uptime / SECSPERHOUR; 498 uptime %= SECSPERHOUR; 499 mins = uptime / SECSPERMIN; 500 (void)printf(" up"); 501 if (days > 0) 502 (void)printf(" %d day%s,", days, 503 days > 1 ? "s" : ""); 504 if (hrs > 0 && mins > 0) 505 (void)printf(" %2d:%02d,", hrs, mins); 506 else { 507 if (hrs > 0) 508 (void)printf(" %d hr%s,", 509 hrs, hrs > 1 ? "s" : ""); 510 if (mins > 0) 511 (void)printf(" %d min%s,", 512 mins, mins > 1 ? "s" : ""); 513 } 514 } 515 } 516 517 /* Print number of users logged in to system */ 518 (void)printf(" %d user%s", nusers, nusers != 1 ? "s" : ""); 519 520 /* 521 * Print 1, 5, and 15 minute load averages. 522 */ 523 if (getloadavg(avenrun, sizeof(avenrun) / sizeof(avenrun[0])) == -1) 524 (void)printf(", no load average information available\n"); 525 else { 526 (void)printf(", load averages:"); 527 for (i = 0; i < (sizeof(avenrun) / sizeof(avenrun[0])); i++) { 528 if (i > 0) 529 (void)printf(","); 530 (void)printf(" %.2f", avenrun[i]); 531 } 532 (void)printf("\n"); 533 } 534 } 535 536 #if defined(SUPPORT_UTMP) || defined(SUPPORT_UTMPX) 537 static struct stat * 538 ttystat(char *line) 539 { 540 static struct stat sb; 541 char ttybuf[MAXPATHLEN]; 542 543 (void)snprintf(ttybuf, sizeof(ttybuf), "%s%s", _PATH_DEV, line); 544 if (stat(ttybuf, &sb)) 545 return (NULL); 546 return (&sb); 547 } 548 549 static void 550 process(struct entry *ep) 551 { 552 struct stat *stp; 553 time_t touched; 554 int max; 555 556 if ((max = strlen(ep->name)) > maxname) 557 maxname = max; 558 if ((max = strlen(ep->line)) > maxline) 559 maxline = max; 560 if ((max = strlen(ep->host)) > maxhost) 561 maxhost = max; 562 563 564 #ifdef SUPPORT_UTMP 565 /* 566 * Hack to recognize and correctly parse 567 * ut entry made by ftpd. The "tty" used 568 * by ftpd is not a real tty, just identifier in 569 * form ftpSUPPORT_ID. Pid parsed from the "tty name" 570 * is used later to match corresponding process. 571 * NB: This is only used for utmp entries. For utmpx, 572 * we already have the pid. 573 */ 574 if (ep->pid == 0 && strncmp(ep->line, "ftp", 3) == 0) { 575 ep->pid = strtol(ep->line + 3, NULL, 10); 576 return; 577 } 578 #endif 579 if ((stp = ttystat(ep->line)) == NULL) 580 return; 581 582 ep->tdev = stp->st_rdev; 583 /* 584 * If this is the console device, attempt to ascertain 585 * the true console device dev_t. 586 */ 587 if (ep->tdev == 0) { 588 int mib[2]; 589 size_t size; 590 591 mib[0] = CTL_KERN; 592 mib[1] = KERN_CONSDEV; 593 size = sizeof(dev_t); 594 (void) sysctl(mib, 2, &ep->tdev, &size, NULL, 0); 595 } 596 597 touched = stp->st_atime; 598 if (touched < ep->tv.tv_sec) { 599 /* tty untouched since before login */ 600 touched = ep->tv.tv_sec; 601 } 602 if ((ep->idle = now - touched) < 0) 603 ep->idle = 0; 604 } 605 #endif 606 607 static void 608 usage(int wcmd) 609 { 610 611 if (wcmd) 612 (void)fprintf(stderr, 613 "usage: w: [-hin] [-M core] [-N system] [user]\n"); 614 else 615 (void)fprintf(stderr, "uptime\n"); 616 exit(1); 617 } 618
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