w.c revision 1.57
1 /* $NetBSD: w.c,v 1.57 2003/02/26 19:01:54 fredb 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 1.57 2003/02/26 19:01:54 fredb 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 *kp; /* `most interesting' proc */ 123 pid_t pid; /* pid or ~0 if not known */ 124 } *ep, *ehead = NULL, **nextp = &ehead; 125 126 static void pr_args(struct kinfo_proc2 *); 127 static void pr_header(time_t *, int); 128 #if defined(SUPPORT_UTMP) || defined(SUPPORT_UTMPX) 129 static struct stat *ttystat(char *); 130 static void process(struct entry *); 131 #endif 132 static void usage(int); 133 int main(int, char **); 134 135 int 136 main(int argc, char **argv) 137 { 138 struct kinfo_proc2 *kp; 139 struct hostent *hp; 140 struct in_addr l; 141 int ch, i, nentries, nusers, wcmd; 142 char *memf, *nlistf, *p, *x; 143 time_t then; 144 #ifdef SUPPORT_UTMP 145 struct utmp *ut; 146 #endif 147 #ifdef SUPPORT_UTMPX 148 struct utmpx *utx; 149 #endif 150 const char *progname; 151 char buf[MAXHOSTNAMELEN], errbuf[_POSIX2_LINE_MAX]; 152 153 /* Are we w(1) or uptime(1)? */ 154 progname = getprogname(); 155 if (*progname == '-') 156 progname++; 157 if (*progname == 'u') { 158 wcmd = 0; 159 p = ""; 160 } else { 161 wcmd = 1; 162 p = "hiflM:N:nsuw"; 163 } 164 165 memf = nlistf = NULL; 166 while ((ch = getopt(argc, argv, p)) != -1) 167 switch (ch) { 168 case 'h': 169 header = 0; 170 break; 171 case 'i': 172 sortidle = 1; 173 break; 174 case 'M': 175 header = 0; 176 memf = optarg; 177 break; 178 case 'N': 179 nlistf = optarg; 180 break; 181 case 'n': 182 nflag = 1; 183 break; 184 case 'f': case 'l': case 's': case 'u': case 'w': 185 warnx("[-flsuw] no longer supported"); 186 /* FALLTHROUGH */ 187 case '?': 188 default: 189 usage(wcmd); 190 } 191 argc -= optind; 192 argv += optind; 193 194 if ((kd = kvm_openfiles(nlistf, memf, NULL, 195 memf == NULL ? KVM_NO_FILES : O_RDONLY, errbuf)) == NULL) 196 errx(1, "%s", errbuf); 197 198 (void)time(&now); 199 200 #ifdef SUPPORT_UTMPX 201 setutxent(); 202 #endif 203 #ifdef SUPPORT_UTMP 204 setutent(); 205 #endif 206 207 if (*argv) 208 sel_user = *argv; 209 210 nusers = 0; 211 #ifdef SUPPORT_UTMPX 212 while ((utx = getutxent()) != NULL) { 213 if (utx->ut_type != USER_PROCESS) 214 continue; 215 ++nusers; 216 if (sel_user && 217 strncmp(utx->ut_name, sel_user, sizeof(utx->ut_name) != 0)) 218 continue; 219 if ((ep = calloc(1, sizeof(struct entry))) == NULL) 220 err(1, NULL); 221 (void)memcpy(ep->name, utx->ut_name, sizeof(utx->ut_name)); 222 (void)memcpy(ep->line, utx->ut_line, sizeof(utx->ut_line)); 223 ep->name[sizeof(utx->ut_name)] = '\0'; 224 ep->line[sizeof(utx->ut_line)] = '\0'; 225 if (!nflag || getnameinfo((struct sockaddr *)&utx->ut_ss, 226 utx->ut_ss.ss_len, ep->host, sizeof(ep->host), NULL, 0, 227 NI_NUMERICHOST) != 0) { 228 (void)memcpy(ep->host, utx->ut_host, 229 sizeof(utx->ut_host)); 230 ep->host[sizeof(utx->ut_host)] = '\0'; 231 } 232 ep->type[0] = 'x'; 233 ep->tv = utx->ut_tv; 234 ep->pid = utx->ut_pid; 235 *nextp = ep; 236 nextp = &(ep->next); 237 if (wcmd != 0) 238 process(ep); 239 } 240 #endif 241 242 #ifdef SUPPORT_UTMP 243 while ((ut = getutent()) != NULL) { 244 if (ut->ut_name[0] == '\0') 245 continue; 246 247 if (sel_user && 248 strncmp(ut->ut_name, sel_user, sizeof(ut->ut_name) != 0)) 249 continue; 250 251 /* Don't process entries that we have utmpx for */ 252 for (ep = ehead; ep != NULL; ep = ep->next) { 253 if (strncmp(ep->line, ut->ut_line, 254 sizeof(ut->ut_line)) == 0) 255 break; 256 } 257 if (ep != NULL) 258 continue; 259 260 ++nusers; 261 if ((ep = calloc(1, sizeof(struct entry))) == NULL) 262 err(1, NULL); 263 (void)memcpy(ep->name, ut->ut_name, sizeof(ut->ut_name)); 264 (void)memcpy(ep->line, ut->ut_line, sizeof(ut->ut_line)); 265 (void)memcpy(ep->host, ut->ut_host, sizeof(ut->ut_host)); 266 ep->name[sizeof(ut->ut_name)] = '\0'; 267 ep->line[sizeof(ut->ut_line)] = '\0'; 268 ep->host[sizeof(ut->ut_host)] = '\0'; 269 ep->tv.tv_sec = ut->ut_time; 270 *nextp = ep; 271 nextp = &(ep->next); 272 if (wcmd != 0) 273 process(ep); 274 } 275 #endif 276 277 #ifdef SUPPORT_UTMPX 278 endutxent(); 279 #endif 280 #ifdef SUPPORT_UTMP 281 endutent(); 282 #endif 283 284 if (header || wcmd == 0) { 285 pr_header(&now, nusers); 286 if (wcmd == 0) 287 exit (0); 288 } 289 290 if ((kp = kvm_getproc2(kd, KERN_PROC_ALL, 0, 291 sizeof(struct kinfo_proc2), &nentries)) == NULL) 292 errx(1, "%s", kvm_geterr(kd)); 293 294 /* Include trailing space because TTY header starts one column early. */ 295 for (i = 0; i < nentries; i++, kp++) { 296 297 if (kp->p_stat == SIDL || kp->p_stat == SZOMB) 298 continue; 299 300 for (ep = ehead; ep != NULL; ep = ep->next) { 301 if (ep->tdev != 0) { 302 if (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->kp, kp)) { 309 ep->kp = kp; 310 } 311 break; 312 } 313 } else if (ep->pid != 0 && ep->pid == kp->p_pid) { 314 ep->kp = kp; 315 break; 316 } 317 } 318 } 319 320 argwidth = printf("%-*sTTY %-*s %*s IDLE WHAT\n", 321 maxname, "USER", maxhost, "FROM", 322 7 /* "dddhhXm" */, "LOGIN@"); 323 argwidth -= sizeof("WHAT\n") - 1 /* NUL */; 324 325 if ((ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) == -1 && 326 ioctl(STDERR_FILENO, TIOCGWINSZ, &ws) == -1 && 327 ioctl(STDIN_FILENO, TIOCGWINSZ, &ws) == -1) || ws.ws_col == 0) 328 ttywidth = 79; 329 else 330 ttywidth = ws.ws_col - 1; 331 argwidth = ttywidth - argwidth; 332 if (argwidth < 4) 333 argwidth = 8; 334 /* sort by idle time */ 335 if (sortidle && ehead != NULL) { 336 struct entry *from = ehead, *save; 337 338 ehead = NULL; 339 while (from != NULL) { 340 for (nextp = &ehead; 341 (*nextp) && from->idle >= (*nextp)->idle; 342 nextp = &(*nextp)->next) 343 continue; 344 save = from; 345 from = from->next; 346 save->next = *nextp; 347 *nextp = save; 348 } 349 } 350 #if defined(SUPPORT_UTMP) && defined(SUPPORT_UTMPX) 351 else if (ehead != NULL) { 352 struct entry *from = ehead, *save; 353 354 ehead = NULL; 355 while (from != NULL) { 356 for (nextp = &ehead; 357 (*nextp) && strcmp(from->line, (*nextp)->line) > 0; 358 nextp = &(*nextp)->next) 359 continue; 360 save = from; 361 from = from->next; 362 save->next = *nextp; 363 *nextp = save; 364 } 365 } 366 #endif 367 368 if (!nflag) { 369 int rv; 370 371 rv = gethostname(domain, sizeof(domain)); 372 domain[sizeof(domain) - 1] = '\0'; 373 if (rv < 0 || (p = strchr(domain, '.')) == 0) 374 domain[0] = '\0'; 375 else 376 memmove(domain, p, strlen(p) + 1); 377 } 378 379 for (ep = ehead; ep != NULL; ep = ep->next) { 380 char host_buf[MAXHOSTNAMELEN + 1]; 381 382 host_buf[MAXHOSTNAMELEN] = '\0'; 383 strncpy(host_buf, ep->host, MAXHOSTNAMELEN); 384 p = *host_buf ? host_buf : "-"; 385 386 for (x = p; x < p + MAXHOSTNAMELEN; x++) 387 if (*x == '\0' || *x == ':') 388 break; 389 if (x == p + MAXHOSTNAMELEN || *x != ':') 390 x = NULL; 391 else 392 *x++ = '\0'; 393 394 if (!nflag && inet_aton(p, &l) && 395 (hp = gethostbyaddr((char *)&l, sizeof(l), AF_INET))) { 396 if (domain[0] != '\0') { 397 p = hp->h_name; 398 p += strlen(hp->h_name); 399 p -= strlen(domain); 400 if (p > hp->h_name && 401 strcasecmp(p, domain) == 0) 402 *p = '\0'; 403 } 404 p = hp->h_name; 405 } 406 if (x) { 407 (void)snprintf(buf, sizeof(buf), "%s:%s", p, x); 408 p = buf; 409 } 410 if (ep->kp == NULL) { 411 warnx("Stale utmp%s entry: %s %s %s", 412 ep->type, ep->name, ep->line, ep->host); 413 continue; 414 } 415 (void)printf("%-*s %-2.2s %-*.*s ", 416 maxname, ep->kp->p_login, 417 (strncmp(ep->line, "tty", 3) && 418 strncmp(ep->line, "dty", 3)) ? 419 ep->line : ep->line + 3, 420 maxhost, maxhost, *p ? p : "-"); 421 then = (time_t)ep->tv.tv_sec; 422 pr_attime(&then, &now); 423 pr_idle(ep->idle); 424 pr_args(ep->kp); 425 (void)printf("\n"); 426 } 427 exit(0); 428 } 429 430 static void 431 pr_args(struct kinfo_proc2 *kp) 432 { 433 char **argv; 434 int left; 435 436 if (kp == 0) 437 goto nothing; 438 left = argwidth; 439 argv = kvm_getargv2(kd, kp, argwidth); 440 if (argv == 0) { 441 if (kp->p_comm == 0) { 442 goto nothing; 443 } else { 444 fmt_putc('(', &left); 445 fmt_puts((char *)kp->p_comm, &left); 446 fmt_putc(')', &left); 447 return; 448 } 449 } 450 while (*argv) { 451 fmt_puts(*argv, &left); 452 argv++; 453 fmt_putc(' ', &left); 454 } 455 return; 456 nothing: 457 putchar('-'); 458 } 459 460 static void 461 pr_header(time_t *nowp, int nusers) 462 { 463 double avenrun[3]; 464 time_t uptime; 465 int days, hrs, i, mins; 466 int mib[2]; 467 size_t size; 468 char buf[256]; 469 470 /* 471 * Print time of day. 472 * 473 * SCCS forces the string manipulation below, as it replaces 474 * %, M, and % in a character string with the file name. 475 */ 476 (void)strftime(buf, sizeof(buf), "%l:%" "M%p", localtime(nowp)); 477 buf[sizeof(buf) - 1] = '\0'; 478 (void)printf("%s ", buf); 479 480 /* 481 * Print how long system has been up. 482 * (Found by looking getting "boottime" from the kernel) 483 */ 484 mib[0] = CTL_KERN; 485 mib[1] = KERN_BOOTTIME; 486 size = sizeof(boottime); 487 if (sysctl(mib, 2, &boottime, &size, NULL, 0) != -1 && 488 boottime.tv_sec != 0) { 489 uptime = now - boottime.tv_sec; 490 uptime += 30; 491 if (uptime > SECSPERMIN) { 492 days = uptime / SECSPERDAY; 493 uptime %= SECSPERDAY; 494 hrs = uptime / SECSPERHOUR; 495 uptime %= SECSPERHOUR; 496 mins = uptime / SECSPERMIN; 497 (void)printf(" up"); 498 if (days > 0) 499 (void)printf(" %d day%s,", days, 500 days > 1 ? "s" : ""); 501 if (hrs > 0 && mins > 0) 502 (void)printf(" %2d:%02d,", hrs, mins); 503 else { 504 if (hrs > 0) 505 (void)printf(" %d hr%s,", 506 hrs, hrs > 1 ? "s" : ""); 507 if (mins > 0) 508 (void)printf(" %d min%s,", 509 mins, mins > 1 ? "s" : ""); 510 } 511 } 512 } 513 514 /* Print number of users logged in to system */ 515 (void)printf(" %d user%s", nusers, nusers != 1 ? "s" : ""); 516 517 /* 518 * Print 1, 5, and 15 minute load averages. 519 */ 520 if (getloadavg(avenrun, sizeof(avenrun) / sizeof(avenrun[0])) == -1) 521 (void)printf(", no load average information available\n"); 522 else { 523 (void)printf(", load averages:"); 524 for (i = 0; i < (sizeof(avenrun) / sizeof(avenrun[0])); i++) { 525 if (i > 0) 526 (void)printf(","); 527 (void)printf(" %.2f", avenrun[i]); 528 } 529 (void)printf("\n"); 530 } 531 } 532 533 #if defined(SUPPORT_UTMP) || defined(SUPPORT_UTMPX) 534 static struct stat * 535 ttystat(char *line) 536 { 537 static struct stat sb; 538 char ttybuf[MAXPATHLEN]; 539 540 (void)snprintf(ttybuf, sizeof(ttybuf), "%s%s", _PATH_DEV, line); 541 if (stat(ttybuf, &sb)) 542 return (NULL); 543 return (&sb); 544 } 545 546 static void 547 process(struct entry *ep) 548 { 549 struct stat *stp; 550 time_t touched; 551 int max; 552 553 if ((max = strlen(ep->name)) > maxname) 554 maxname = max; 555 if ((max = strlen(ep->line)) > maxline) 556 maxline = max; 557 if ((max = strlen(ep->host)) > maxhost) 558 maxhost = max; 559 560 561 #ifdef SUPPORT_UTMP 562 /* 563 * Hack to recognize and correctly parse 564 * ut entry made by ftpd. The "tty" used 565 * by ftpd is not a real tty, just identifier in 566 * form ftpSUPPORT_ID. Pid parsed from the "tty name" 567 * is used later to match corresponding process. 568 * NB: This is only used for utmp entries. For utmpx, 569 * we already have the pid. 570 */ 571 if (ep->pid == 0 && strncmp(ep->line, "ftp", 3) == 0) { 572 ep->pid = strtol(ep->line + 3, NULL, 10); 573 return; 574 } 575 #endif 576 if ((stp = ttystat(ep->line)) == NULL) 577 return; 578 579 ep->tdev = stp->st_rdev; 580 /* 581 * If this is the console device, attempt to ascertain 582 * the true console device dev_t. 583 */ 584 if (ep->tdev == 0) { 585 int mib[2]; 586 size_t size; 587 588 mib[0] = CTL_KERN; 589 mib[1] = KERN_CONSDEV; 590 size = sizeof(dev_t); 591 (void) sysctl(mib, 2, &ep->tdev, &size, NULL, 0); 592 } 593 594 touched = stp->st_atime; 595 if (touched < ep->tv.tv_sec) { 596 /* tty untouched since before login */ 597 touched = ep->tv.tv_sec; 598 } 599 if ((ep->idle = now - touched) < 0) 600 ep->idle = 0; 601 } 602 #endif 603 604 static void 605 usage(int wcmd) 606 { 607 608 if (wcmd) 609 (void)fprintf(stderr, 610 "usage: w: [-hin] [-M core] [-N system] [user]\n"); 611 else 612 (void)fprintf(stderr, "uptime\n"); 613 exit(1); 614 } 615
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