1 /*- 2 * Copyright (c) 1980, 1991, 1993, 1994 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * @(#) Copyright (c) 1980, 1991, 1993, 1994 The Regents of the University of California. All rights reserved. 30 * @(#)w.c 8.4 (Berkeley) 4/16/94 31 * $FreeBSD: src/usr.bin/w/w.c,v 1.38.2.6 2002/03/12 19:51:51 phantom Exp $ 32 */ 33 34 /* 35 * w - print system status (who and what) 36 * 37 * This program is similar to the systat command on Tenex/Tops 10/20 38 * 39 */ 40 #include <sys/user.h> 41 #include <sys/param.h> 42 #include <sys/time.h> 43 #include <sys/stat.h> 44 #include <sys/sysctl.h> 45 #include <sys/ioctl.h> 46 #include <sys/socket.h> 47 #include <sys/tty.h> 48 49 #include <machine/cpu.h> 50 #include <netinet/in.h> 51 #include <arpa/inet.h> 52 53 #include <ctype.h> 54 #include <err.h> 55 #include <errno.h> 56 #include <fcntl.h> 57 #include <kvm.h> 58 #include <limits.h> 59 #include <langinfo.h> 60 #include <locale.h> 61 #include <netdb.h> 62 #include <nlist.h> 63 #include <paths.h> 64 #include <stdio.h> 65 #include <stdlib.h> 66 #include <string.h> 67 #include <unistd.h> 68 #include <utmpx.h> 69 #include <vis.h> 70 71 #include <arpa/nameser.h> 72 #include <resolv.h> 73 74 #include "extern.h" 75 76 struct timeval boottime; 77 struct winsize ws; 78 kvm_t *kd; 79 time_t now; /* the current time of day */ 80 time_t then; 81 time_t uptime; /* time of last reboot & elapsed time since */ 82 int ttywidth; /* width of tty */ 83 int argwidth; /* width of tty */ 84 int header = 1; /* true if -h flag: don't print heading */ 85 int nflag; /* true if -n flag: don't convert addrs */ 86 int dflag; /* true if -d flag: output debug info */ 87 int sortidle; /* sort by idle time */ 88 int use_ampm; /* use AM/PM time */ 89 int use_comma; /* use comma as floats separator */ 90 char **sel_users; /* login array of particular users selected */ 91 char domain[MAXHOSTNAMELEN]; 92 int maxname = 8, maxline = 3, maxhost = 16; 93 94 /* 95 * One of these per active utmp entry. 96 */ 97 struct entry { 98 struct entry *next; 99 char name[UTX_USERSIZE + 1]; 100 char line[UTX_LINESIZE + 1]; 101 char host[UTX_HOSTSIZE + 1]; 102 char type[2]; 103 struct timeval tv; 104 dev_t tdev; /* dev_t of terminal */ 105 time_t idle; /* idle time of terminal in seconds */ 106 struct kinfo_proc *kp; /* `most interesting' proc */ 107 char *args; /* arg list of interesting process */ 108 struct kinfo_proc *dkp; /* debug option proc list */ 109 pid_t pid; /* pid or ~0 if not known */ 110 } *ep, *ehead = NULL, **nextp = &ehead; 111 112 #define debugproc(p) *((struct kinfo_proc **)&(p)->kp_spare[0]) 113 114 static void pr_header(time_t *, int); 115 static struct stat *ttystat(char *, int); 116 static void process(struct entry *); 117 static void usage(int); 118 static int this_is_uptime(const char *s); 119 120 char *fmt_argv(char **, char *, int); /* ../../bin/ps/fmt.c */ 121 122 int 123 main(int argc, char **argv) 124 { 125 struct kinfo_proc *kp; 126 struct kinfo_proc *dkp; 127 struct hostent *hp; 128 in_addr_t l; 129 int ch, i, nentries, nusers, wcmd, longidle, dropgid; 130 char *memf, *nlistf, *p, *x; 131 struct utmpx *utx; 132 char buf[MAXHOSTNAMELEN], errbuf[_POSIX2_LINE_MAX]; 133 134 (void)setlocale(LC_ALL, ""); 135 use_ampm = (*nl_langinfo(T_FMT_AMPM) != '\0'); 136 use_comma = (*nl_langinfo(RADIXCHAR) != ','); 137 138 /* Are we w(1) or uptime(1)? */ 139 if (this_is_uptime(argv[0]) == 0) { 140 wcmd = 0; 141 p = ""; 142 } else { 143 wcmd = 1; 144 p = "dhiflM:N:nsuw"; 145 } 146 147 dropgid = 0; 148 memf = nlistf = _PATH_DEVNULL; 149 while ((ch = getopt(argc, argv, p)) != -1) 150 switch (ch) { 151 case 'd': 152 dflag = 1; 153 break; 154 case 'h': 155 header = 0; 156 break; 157 case 'i': 158 sortidle = 1; 159 break; 160 case 'M': 161 header = 0; 162 memf = optarg; 163 dropgid = 1; 164 break; 165 case 'N': 166 nlistf = optarg; 167 dropgid = 1; 168 break; 169 case 'n': 170 nflag = 1; 171 break; 172 case 'f': case 'l': case 's': case 'u': case 'w': 173 warnx("[-flsuw] no longer supported"); 174 /* FALLTHROUGH */ 175 case '?': 176 default: 177 usage(wcmd); 178 } 179 argc -= optind; 180 argv += optind; 181 182 if (!(_res.options & RES_INIT)) 183 res_init(); 184 _res.retrans = 2; /* resolver timeout to 2 seconds per try */ 185 _res.retry = 1; /* only try once.. */ 186 187 /* 188 * Discard setgid privileges if not the running kernel so that bad 189 * guys can't print interesting stuff from kernel memory. 190 */ 191 if (dropgid) 192 setgid(getgid()); 193 194 if ((kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf)) == NULL) 195 errx(1, "%s", errbuf); 196 197 (void)time(&now); 198 setutxent(); 199 200 if (*argv) 201 sel_users = argv; 202 203 nusers = 0; 204 while ((utx = getutxent()) != NULL) { 205 if (utx->ut_type != USER_PROCESS) 206 continue; 207 ++nusers; 208 209 if (sel_users) { 210 int usermatch; 211 char **user; 212 213 usermatch = 0; 214 for (user = sel_users; !usermatch && *user; user++) 215 if (!strncmp(utx->ut_name, *user, UTX_USERSIZE)) 216 usermatch = 1; 217 if (!usermatch) 218 continue; 219 } 220 221 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 #if 1 230 /* XXX: Actually we don't support the utx->ut_ss stuff yet */ 231 if (!nflag || getnameinfo((struct sockaddr *)&utx->ut_ss, 232 utx->ut_ss.ss_len, ep->host, sizeof(ep->host), NULL, 0, 233 NI_NUMERICHOST) != 0) { 234 (void)memcpy(ep->host, utx->ut_host, 235 sizeof(utx->ut_host)); 236 ep->host[sizeof(utx->ut_host)] = '\0'; 237 } 238 #endif 239 ep->type[0] = 'x'; 240 ep->tv = utx->ut_tv; 241 ep->pid = utx->ut_pid; 242 243 *nextp = ep; 244 nextp = &(ep->next); 245 if (wcmd != 0) 246 process(ep); 247 } 248 endutxent(); 249 250 if (header || wcmd == 0) { 251 pr_header(&now, nusers); 252 if (wcmd == 0) { 253 (void)kvm_close(kd); 254 exit(0); 255 } 256 257 #define HEADER_USER "USER" 258 #define HEADER_TTY "TTY" 259 #define HEADER_FROM "FROM" 260 #define HEADER_LOGIN_IDLE "LOGIN@ IDLE " 261 #define HEADER_WHAT "WHAT\n" 262 #define WUSED (maxname + maxline + maxhost + \ 263 sizeof(HEADER_LOGIN_IDLE) + 3) /* header width incl. spaces */ 264 (void)printf("%-*.*s %-*.*s %-*.*s %s", 265 maxname, maxname, HEADER_USER, 266 maxline, maxline, HEADER_TTY, 267 maxhost, maxhost, HEADER_FROM, 268 HEADER_LOGIN_IDLE HEADER_WHAT); 269 } 270 271 if ((kp = kvm_getprocs(kd, KERN_PROC_ALL, 0, &nentries)) == NULL) 272 err(1, "%s", kvm_geterr(kd)); 273 for (i = 0; i < nentries; i++, kp++) { 274 if (kp->kp_stat == SIDL || kp->kp_stat == SZOMB) 275 continue; 276 for (ep = ehead; ep != NULL; ep = ep->next) { 277 if (ep->tdev == kp->kp_tdev) { 278 /* 279 * proc is associated with this terminal 280 */ 281 if (ep->kp == NULL && kp->kp_pgid == kp->kp_tpgid) { 282 /* 283 * Proc is 'most interesting' 284 */ 285 if (proc_compare(ep->kp, kp)) 286 ep->kp = kp; 287 } 288 /* 289 * Proc debug option info; add to debug 290 * list using kinfo_proc kp_eproc.e_spare 291 * as next pointer; ptr to ptr avoids the 292 * ptr = long assumption. 293 */ 294 dkp = ep->dkp; 295 ep->dkp = kp; 296 debugproc(kp) = dkp; 297 } 298 if (ep->pid != 0 && ep->pid == kp->kp_pid) { 299 ep->kp = kp; 300 break; 301 } 302 } 303 } 304 if ((ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) == -1 && 305 ioctl(STDERR_FILENO, TIOCGWINSZ, &ws) == -1 && 306 ioctl(STDIN_FILENO, TIOCGWINSZ, &ws) == -1) || ws.ws_col == 0) 307 ttywidth = 79; 308 else 309 ttywidth = ws.ws_col - 1; 310 argwidth = ttywidth - WUSED; 311 if (argwidth < 4) 312 argwidth = 8; 313 for (ep = ehead; ep != NULL; ep = ep->next) { 314 if (ep->kp == NULL) { 315 ep->args = "-"; 316 continue; 317 } 318 ep->args = fmt_argv(kvm_getargv(kd, ep->kp, argwidth), 319 ep->kp->kp_comm, MAXCOMLEN); 320 if (ep->args == NULL) 321 err(1, NULL); 322 } 323 /* sort by idle time */ 324 if (sortidle && ehead != NULL) { 325 struct entry *from, *save; 326 327 from = ehead; 328 ehead = NULL; 329 while (from != NULL) { 330 for (nextp = &ehead; 331 (*nextp) && from->idle >= (*nextp)->idle; 332 nextp = &(*nextp)->next) 333 continue; 334 save = from; 335 from = from->next; 336 save->next = *nextp; 337 *nextp = save; 338 } 339 } else if (ehead != NULL) { 340 struct entry *from = ehead, *save; 341 342 ehead = NULL; 343 while (from != NULL) { 344 for (nextp = &ehead; 345 (*nextp) && strcmp(from->line, (*nextp)->line) > 0; 346 nextp = &(*nextp)->next) 347 continue; 348 save = from; 349 from = from->next; 350 save->next = *nextp; 351 *nextp = save; 352 } 353 } 354 355 if (!nflag) { 356 if (gethostname(domain, sizeof(domain)) < 0 || 357 (p = strchr(domain, '.')) == NULL) 358 domain[0] = '\0'; 359 else { 360 domain[sizeof(domain) - 1] = '\0'; 361 memmove(domain, p, strlen(p) + 1); 362 } 363 } 364 365 for (ep = ehead; ep != NULL; ep = ep->next) { 366 char host_buf[UTX_HOSTSIZE + 1]; 367 368 host_buf[UTX_HOSTSIZE] = '\0'; 369 strncpy(host_buf, ep->host, maxhost); 370 p = *host_buf ? host_buf : "-"; 371 if ((x = strchr(p, ':')) != NULL) 372 *x++ = '\0'; 373 if (!nflag && isdigit(*p) && 374 (l = inet_addr(p)) != INADDR_NONE && 375 (hp = gethostbyaddr(&l, sizeof(l), AF_INET))) { 376 if (domain[0] != '\0') { 377 p = hp->h_name; 378 p += strlen(hp->h_name); 379 p -= strlen(domain); 380 if (p > hp->h_name && 381 strcasecmp(p, domain) == 0) 382 *p = '\0'; 383 } 384 p = hp->h_name; 385 } 386 if (nflag && *p && strcmp(p, "-") && 387 inet_addr(p) == INADDR_NONE) { 388 hp = gethostbyname(p); 389 390 if (hp != NULL) { 391 struct in_addr in; 392 393 memmove(&in, hp->h_addr, sizeof(in)); 394 p = inet_ntoa(in); 395 } 396 } 397 if (x) { 398 (void)snprintf(buf, sizeof(buf), "%s:%s", p, x); 399 p = buf; 400 } 401 if (dflag) { 402 for (dkp = ep->dkp; dkp != NULL; dkp = debugproc(dkp)) { 403 char *ptr; 404 405 ptr = fmt_argv(kvm_getargv(kd, dkp, argwidth), 406 dkp->kp_comm, MAXCOMLEN); 407 if (ptr == NULL) 408 ptr = "-"; 409 (void)printf("\t\t%-9d %s\n", 410 dkp->kp_pid, ptr); 411 } 412 } 413 (void)printf("%-*.*s %-*.*s %-*.*s ", 414 maxname, maxname, ep->name, 415 maxline, maxline, 416 strncmp(ep->line, "tty", 3) && 417 strncmp(ep->line, "cua", 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 longidle = pr_idle(ep->idle); 423 (void)printf("%.*s\n", argwidth - longidle, ep->args); 424 } 425 (void)kvm_close(kd); 426 exit(0); 427 } 428 429 static void 430 pr_header(time_t *nowp, int nusers) 431 { 432 double avenrun[3]; 433 time_t uptime; 434 int days, hrs, i, mins, secs; 435 int mib[2]; 436 size_t size; 437 char buf[256]; 438 439 /* 440 * Print time of day. (use "AM"/"PM" for all locales) 441 */ 442 (void)strftime_l(buf, sizeof(buf) - 1, 443 use_ampm ? "%l:%M%p" : "%k:%M", 444 localtime(nowp), NULL); 445 buf[sizeof(buf) - 1] = '\0'; 446 (void)printf("%s ", buf); 447 448 /* 449 * Print how long system has been up. 450 * (Found by looking at "boottime" from the kernel) 451 */ 452 mib[0] = CTL_KERN; 453 mib[1] = KERN_BOOTTIME; 454 size = sizeof(boottime); 455 if (sysctl(mib, 2, &boottime, &size, NULL, 0) != -1 && 456 boottime.tv_sec != 0) { 457 uptime = now - boottime.tv_sec; 458 if (uptime > 60) 459 uptime += 30; 460 days = uptime / 86400; 461 uptime %= 86400; 462 hrs = uptime / 3600; 463 uptime %= 3600; 464 mins = uptime / 60; 465 secs = uptime % 60; 466 (void)printf(" up"); 467 if (days > 0) 468 (void)printf(" %d day%s,", days, days > 1 ? "s" : ""); 469 if (hrs > 0 && mins > 0) 470 (void)printf(" %2d:%02d,", hrs, mins); 471 else if (hrs > 0) 472 (void)printf(" %d hr%s,", hrs, hrs > 1 ? "s" : ""); 473 else if (mins > 0) 474 (void)printf(" %d min%s,", mins, mins > 1 ? "s" : ""); 475 else 476 (void)printf(" %d sec%s,", secs, secs > 1 ? "s" : ""); 477 } 478 479 /* Print number of users logged in on system */ 480 (void)printf(" %d user%s", nusers, nusers == 1 ? "" : "s"); 481 482 /* 483 * Print 1, 5, and 15 minute load averages. 484 */ 485 if (getloadavg(avenrun, NELEM(avenrun)) == -1) 486 (void)printf(", no load average information available\n"); 487 else { 488 (void)printf(", load averages:"); 489 for (i = 0; i < (int)NELEM(avenrun); i++) { 490 if (use_comma && i > 0) 491 (void)printf(","); 492 (void)printf(" %.2f", avenrun[i]); 493 } 494 (void)printf("\n"); 495 } 496 } 497 498 static struct stat * 499 ttystat(char *line, int sz) 500 { 501 static struct stat sb; 502 char ttybuf[MAXPATHLEN]; 503 504 (void)snprintf(ttybuf, sizeof(ttybuf), "%s%.*s", _PATH_DEV, sz, line); 505 if (stat(ttybuf, &sb)) { 506 warn("%s", ttybuf); 507 return (NULL); 508 } 509 return (&sb); 510 } 511 512 static void 513 usage(int wcmd) 514 { 515 if (wcmd) 516 (void)fprintf(stderr, 517 "usage: w [-dhin] [-M core] [-N system] [user ...]\n"); 518 else 519 (void)fprintf(stderr, "usage: uptime\n"); 520 exit(1); 521 } 522 523 static int 524 this_is_uptime(const char *s) 525 { 526 const char *u; 527 528 if ((u = strrchr(s, '/')) != NULL) 529 ++u; 530 else 531 u = s; 532 if (strcmp(u, "uptime") == 0) 533 return (0); 534 return (-1); 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 ep->tdev = 0; 552 ep->idle = (time_t)-1; 553 554 if (!(stp = ttystat(ep->line, maxline))) 555 return; /* corrupted record */ 556 557 ep->tdev = stp->st_rdev; 558 #ifdef CPU_CONSDEV 559 /* 560 * If this is the console device, attempt to ascertain 561 * the true console device dev_t. 562 */ 563 if (ep->tdev == 0) { 564 int mib[2]; 565 size_t size; 566 567 mib[0] = CTL_MACHDEP; 568 mib[1] = CPU_CONSDEV; 569 size = sizeof(dev_t); 570 (void)sysctl(mib, 2, &ep->tdev, &size, NULL, 0); 571 } 572 #endif 573 574 touched = stp->st_atime; 575 if (touched < ep->tv.tv_sec) { 576 /* tty untouched since before login */ 577 touched = ep->tv.tv_sec; 578 } 579 if ((ep->idle = now - touched) < 0) 580 ep->idle = 0; 581 } 582