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 static struct winsize ws; 77 static kvm_t *kd; 78 static time_t now; /* the current time of day */ 79 static time_t then; 80 static int ttywidth; /* width of tty */ 81 static int argwidth; /* width of tty */ 82 static int header = 1; /* true if -h flag: don't print heading */ 83 static int nflag; /* true if -n flag: don't convert addrs */ 84 static int dflag; /* true if -d flag: output debug info */ 85 static int sortidle; /* sort by idle time */ 86 int use_ampm; /* use AM/PM time */ 87 static int use_comma; /* use comma as floats separator */ 88 static char **sel_users; /* login array of particular users selected */ 89 static char domain[MAXHOSTNAMELEN]; 90 static int maxname = 8, maxline = 3, maxhost = 16; 91 92 struct kplist { 93 struct kplist *next; 94 struct kinfo_proc *kp; 95 }; 96 97 /* 98 * One of these per active utmpx entry. 99 */ 100 static struct entry { 101 struct entry *next; 102 char name[UTX_USERSIZE + 1]; 103 char line[UTX_LINESIZE + 1]; 104 char host[UTX_HOSTSIZE + 1]; 105 char type[2]; 106 struct timeval tv; 107 dev_t tdev; /* dev_t of terminal */ 108 time_t idle; /* idle time of terminal in seconds */ 109 struct kinfo_proc *kp; /* `most interesting' proc */ 110 char *args; /* arg list of interesting process */ 111 struct kplist *list; /* debug option proc list */ 112 pid_t pid; /* pid or ~0 if not known */ 113 } *ep, *ehead = NULL, **nextp = &ehead; 114 115 static void pr_header(time_t *, int); 116 static struct stat *ttystat(char *, int); 117 static void process(struct entry *); 118 static void usage(int); 119 static int this_is_uptime(const char *s); 120 121 char *fmt_argv(char **, char *, int); /* ../../bin/ps/fmt.c */ 122 123 int 124 main(int argc, char **argv) 125 { 126 struct kinfo_proc *kp; 127 struct kplist *scan; 128 struct hostent *hp; 129 in_addr_t l; 130 int ch, i, nentries, nusers, wcmd, longidle, dropgid; 131 char *memf, *nlistf, *p, *x; 132 struct utmpx *utx; 133 char buf[MAXHOSTNAMELEN], errbuf[_POSIX2_LINE_MAX]; 134 135 (void)setlocale(LC_ALL, ""); 136 use_ampm = (*nl_langinfo(T_FMT_AMPM) != '\0'); 137 use_comma = (*nl_langinfo(RADIXCHAR) != ','); 138 139 /* Are we w(1) or uptime(1)? */ 140 if (this_is_uptime(argv[0]) == 0) { 141 wcmd = 0; 142 p = ""; 143 } else { 144 wcmd = 1; 145 p = "dhiflM:N:nsuw"; 146 } 147 148 dropgid = 0; 149 memf = nlistf = _PATH_DEVNULL; 150 while ((ch = getopt(argc, argv, p)) != -1) 151 switch (ch) { 152 case 'd': 153 dflag = 1; 154 break; 155 case 'h': 156 header = 0; 157 break; 158 case 'i': 159 sortidle = 1; 160 break; 161 case 'M': 162 header = 0; 163 memf = optarg; 164 dropgid = 1; 165 break; 166 case 'N': 167 nlistf = optarg; 168 dropgid = 1; 169 break; 170 case 'n': 171 nflag = 1; 172 break; 173 case 'f': case 'l': case 's': case 'u': case 'w': 174 warnx("[-flsuw] no longer supported"); 175 /* FALLTHROUGH */ 176 case '?': 177 default: 178 usage(wcmd); 179 } 180 argc -= optind; 181 argv += optind; 182 183 if (!(_res.options & RES_INIT)) 184 res_init(); 185 _res.retrans = 2; /* resolver timeout to 2 seconds per try */ 186 _res.retry = 1; /* only try once.. */ 187 188 /* 189 * Discard setgid privileges if not the running kernel so that bad 190 * guys can't print interesting stuff from kernel memory. 191 */ 192 if (dropgid) 193 setgid(getgid()); 194 195 if ((kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf)) == NULL) 196 errx(1, "%s", errbuf); 197 198 (void)time(&now); 199 setutxent(); 200 201 if (*argv) 202 sel_users = argv; 203 204 nusers = 0; 205 while ((utx = getutxent()) != NULL) { 206 if (utx->ut_type != USER_PROCESS) 207 continue; 208 ++nusers; 209 210 if (sel_users) { 211 int usermatch; 212 char **user; 213 214 usermatch = 0; 215 for (user = sel_users; !usermatch && *user; user++) 216 if (!strncmp(utx->ut_name, *user, UTX_USERSIZE)) 217 usermatch = 1; 218 if (!usermatch) 219 continue; 220 } 221 222 if ((ep = calloc(1, sizeof(struct entry))) == NULL) 223 err(1, NULL); 224 (void)memcpy(ep->name, utx->ut_name, sizeof(utx->ut_name)); 225 (void)memcpy(ep->line, utx->ut_line, sizeof(utx->ut_line)); 226 (void)memcpy(ep->host, utx->ut_host, sizeof(utx->ut_host)); 227 ep->name[sizeof(utx->ut_name)] = '\0'; 228 ep->line[sizeof(utx->ut_line)] = '\0'; 229 ep->host[sizeof(utx->ut_host)] = '\0'; 230 #if 1 231 /* XXX: Actually we don't support the utx->ut_ss stuff yet */ 232 if (!nflag || getnameinfo((struct sockaddr *)&utx->ut_ss, 233 utx->ut_ss.ss_len, ep->host, sizeof(ep->host), NULL, 0, 234 NI_NUMERICHOST) != 0) { 235 (void)memcpy(ep->host, utx->ut_host, 236 sizeof(utx->ut_host)); 237 ep->host[sizeof(utx->ut_host)] = '\0'; 238 } 239 #endif 240 ep->type[0] = 'x'; 241 ep->tv = utx->ut_tv; 242 ep->pid = utx->ut_pid; 243 244 *nextp = ep; 245 nextp = &(ep->next); 246 if (wcmd != 0) 247 process(ep); 248 } 249 endutxent(); 250 251 if (header || wcmd == 0) { 252 pr_header(&now, nusers); 253 if (wcmd == 0) { 254 (void)kvm_close(kd); 255 exit(0); 256 } 257 258 #define HEADER_USER "USER" 259 #define HEADER_TTY "TTY" 260 #define HEADER_FROM "FROM" 261 #define HEADER_LOGIN_IDLE "LOGIN@ IDLE " 262 #define HEADER_WHAT "WHAT\n" 263 #define WUSED (maxname + maxline + maxhost + \ 264 sizeof(HEADER_LOGIN_IDLE) + 3) /* header width incl. spaces */ 265 (void)printf("%-*.*s %-*.*s %-*.*s %s", 266 maxname, maxname, HEADER_USER, 267 maxline, maxline, HEADER_TTY, 268 maxhost, maxhost, HEADER_FROM, 269 HEADER_LOGIN_IDLE HEADER_WHAT); 270 } 271 272 if ((kp = kvm_getprocs(kd, KERN_PROC_ALL, 0, &nentries)) == NULL) 273 err(1, "%s", kvm_geterr(kd)); 274 for (i = 0; i < nentries; i++, kp++) { 275 /* 276 * login(1) is a special case. 277 */ 278 if (strcmp(kp->kp_comm, "login") == 0) 279 continue; 280 if (kp->kp_stat == SIDL || kp->kp_stat == SZOMB) 281 continue; 282 if (kp->kp_sid != kp->kp_tsid) 283 continue; 284 for (ep = ehead; ep != NULL; ep = ep->next) { 285 if (ep->tdev == kp->kp_tdev) { 286 /* 287 * proc is associated with this terminal 288 */ 289 if (ep->kp == NULL && 290 kp->kp_pgid == kp->kp_tpgid) 291 { 292 /* 293 * Proc is 'most interesting' 294 */ 295 if (proc_compare(ep->kp, kp)) 296 ep->kp = kp; 297 } 298 /* 299 * Retain list of kinfo_proc's for -d 300 * option. 301 */ 302 scan = malloc(sizeof(*scan)); 303 scan->kp = kp; 304 scan->next = ep->list; 305 ep->list = scan; 306 } 307 if (ep->pid != 0 && ep->pid == kp->kp_pid) { 308 ep->kp = kp; 309 break; 310 } 311 } 312 } 313 if ((ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) == -1 && 314 ioctl(STDERR_FILENO, TIOCGWINSZ, &ws) == -1 && 315 ioctl(STDIN_FILENO, TIOCGWINSZ, &ws) == -1) || ws.ws_col == 0) 316 ttywidth = 79; 317 else 318 ttywidth = ws.ws_col - 1; 319 argwidth = ttywidth - WUSED; 320 if (argwidth < 4) 321 argwidth = 8; 322 for (ep = ehead; ep != NULL; ep = ep->next) { 323 if (ep->kp == NULL) { 324 ep->args = "-"; 325 continue; 326 } 327 ep->args = fmt_argv(kvm_getargv(kd, ep->kp, argwidth), 328 ep->kp->kp_comm, MAXCOMLEN); 329 if (ep->args == NULL) 330 err(1, NULL); 331 } 332 /* sort by idle time */ 333 if (sortidle && ehead != NULL) { 334 struct entry *from, *save; 335 336 from = ehead; 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 } else if (ehead != NULL) { 349 struct entry *from = ehead, *save; 350 351 ehead = NULL; 352 while (from != NULL) { 353 for (nextp = &ehead; 354 (*nextp) && strcmp(from->line, (*nextp)->line) > 0; 355 nextp = &(*nextp)->next) 356 continue; 357 save = from; 358 from = from->next; 359 save->next = *nextp; 360 *nextp = save; 361 } 362 } 363 364 if (!nflag) { 365 if (gethostname(domain, sizeof(domain)) < 0 || 366 (p = strchr(domain, '.')) == NULL) 367 domain[0] = '\0'; 368 else { 369 domain[sizeof(domain) - 1] = '\0'; 370 memmove(domain, p, strlen(p) + 1); 371 } 372 } 373 374 for (ep = ehead; ep != NULL; ep = ep->next) { 375 char host_buf[UTX_HOSTSIZE + 1]; 376 377 host_buf[UTX_HOSTSIZE] = '\0'; 378 strncpy(host_buf, ep->host, maxhost); 379 p = *host_buf ? host_buf : "-"; 380 if ((x = strchr(p, ':')) != NULL) 381 *x++ = '\0'; 382 if (!nflag && isdigit(*p) && 383 (l = inet_addr(p)) != INADDR_NONE && 384 (hp = gethostbyaddr(&l, sizeof(l), AF_INET))) { 385 if (domain[0] != '\0') { 386 p = hp->h_name; 387 p += strlen(hp->h_name); 388 p -= strlen(domain); 389 if (p > hp->h_name && 390 strcasecmp(p, domain) == 0) 391 *p = '\0'; 392 } 393 p = hp->h_name; 394 } 395 if (nflag && *p && strcmp(p, "-") && 396 inet_addr(p) == INADDR_NONE) { 397 hp = gethostbyname(p); 398 399 if (hp != NULL) { 400 struct in_addr in; 401 402 memmove(&in, hp->h_addr, sizeof(in)); 403 p = inet_ntoa(in); 404 } 405 } 406 if (x) { 407 (void)snprintf(buf, sizeof(buf), "%s:%s", p, x); 408 p = buf; 409 } 410 if (dflag) { 411 for (scan = ep->list; scan; scan = scan->next) { 412 char *ptr; 413 414 ptr = fmt_argv(kvm_getargv(kd, scan->kp, 415 argwidth), 416 scan->kp->kp_comm, 417 MAXCOMLEN); 418 if (ptr == NULL) 419 ptr = "-"; 420 printf("\t\t%-9d %s\n", scan->kp->kp_pid, ptr); 421 } 422 } 423 (void)printf("%-*.*s %-*.*s %-*.*s ", 424 maxname, maxname, ep->name, 425 maxline, maxline, 426 strncmp(ep->line, "tty", 3) && 427 strncmp(ep->line, "cua", 3) ? 428 ep->line : ep->line + 3, 429 maxhost, maxhost, *p ? p : "-"); 430 then = (time_t)ep->tv.tv_sec; 431 pr_attime(&then, &now); 432 longidle = pr_idle(ep->idle); 433 (void)printf("%.*s\n", argwidth - longidle, ep->args); 434 } 435 (void)kvm_close(kd); 436 exit(0); 437 } 438 439 static void 440 pr_header(time_t *nowp, int nusers) 441 { 442 struct timespec boot_ts; 443 double avenrun[3]; 444 time_t uptime; 445 int days, hrs, i, mins, secs; 446 char buf[256]; 447 448 /* 449 * Print time of day. (use "AM"/"PM" for all locales) 450 */ 451 (void)strftime_l(buf, sizeof(buf) - 1, 452 use_ampm ? "%l:%M%p" : "%k:%M", 453 localtime(nowp), NULL); 454 buf[sizeof(buf) - 1] = '\0'; 455 (void)printf("%s ", buf); 456 457 /* 458 * Print how long system has been up. 459 * 460 * Use clock_gettime() rather than trying to calculate 461 * a realtime delta that would be subject to time and date 462 * changes. 463 */ 464 if (clock_gettime(CLOCK_UPTIME, &boot_ts) == 0) { 465 uptime = boot_ts.tv_sec; 466 if (uptime > 60) 467 uptime += 30; 468 days = uptime / 86400; 469 uptime %= 86400; 470 hrs = uptime / 3600; 471 uptime %= 3600; 472 mins = uptime / 60; 473 secs = uptime % 60; 474 (void)printf(" up"); 475 if (days > 0) 476 (void)printf(" %d day%s,", days, days > 1 ? "s" : ""); 477 if (hrs > 0 && mins > 0) 478 (void)printf(" %2d:%02d,", hrs, mins); 479 else if (hrs > 0) 480 (void)printf(" %d hr%s,", hrs, hrs > 1 ? "s" : ""); 481 else if (mins > 0) 482 (void)printf(" %d min%s,", mins, mins > 1 ? "s" : ""); 483 else 484 (void)printf(" %d sec%s,", secs, secs > 1 ? "s" : ""); 485 } 486 487 /* Print number of users logged in on system */ 488 (void)printf(" %d user%s", nusers, nusers == 1 ? "" : "s"); 489 490 /* 491 * Print 1, 5, and 15 minute load averages. 492 */ 493 if (getloadavg(avenrun, NELEM(avenrun)) == -1) 494 (void)printf(", no load average information available\n"); 495 else { 496 (void)printf(", load averages:"); 497 for (i = 0; i < (int)NELEM(avenrun); i++) { 498 if (use_comma && i > 0) 499 (void)printf(","); 500 (void)printf(" %.2f", avenrun[i]); 501 } 502 (void)printf("\n"); 503 } 504 } 505 506 static struct stat * 507 ttystat(char *line, int sz) 508 { 509 static struct stat sb; 510 char ttybuf[MAXPATHLEN]; 511 512 (void)snprintf(ttybuf, sizeof(ttybuf), "%s%.*s", _PATH_DEV, sz, line); 513 if (stat(ttybuf, &sb)) { 514 warn("%s", ttybuf); 515 return (NULL); 516 } 517 return (&sb); 518 } 519 520 static void 521 usage(int wcmd) 522 { 523 if (wcmd) 524 (void)fprintf(stderr, 525 "usage: w [-dhin] [-M core] [-N system] [user ...]\n"); 526 else 527 (void)fprintf(stderr, "usage: uptime\n"); 528 exit(1); 529 } 530 531 static int 532 this_is_uptime(const char *s) 533 { 534 const char *u; 535 536 if ((u = strrchr(s, '/')) != NULL) 537 ++u; 538 else 539 u = s; 540 if (strcmp(u, "uptime") == 0) 541 return (0); 542 return (-1); 543 } 544 545 static void 546 process(struct entry *ep) 547 { 548 struct stat *stp; 549 time_t touched; 550 int max; 551 552 if ((max = strlen(ep->name)) > maxname) 553 maxname = max; 554 if ((max = strlen(ep->line)) > maxline) 555 maxline = max; 556 if ((max = strlen(ep->host)) > maxhost) 557 maxhost = max; 558 559 ep->tdev = 0; 560 ep->idle = (time_t)-1; 561 562 if (!(stp = ttystat(ep->line, maxline))) 563 return; /* corrupted record */ 564 565 ep->tdev = stp->st_rdev; 566 #ifdef CPU_CONSDEV 567 /* 568 * If this is the console device, attempt to ascertain 569 * the true console device dev_t. 570 */ 571 if (ep->tdev == 0) { 572 int mib[2]; 573 size_t size; 574 575 mib[0] = CTL_MACHDEP; 576 mib[1] = CPU_CONSDEV; 577 size = sizeof(dev_t); 578 (void)sysctl(mib, 2, &ep->tdev, &size, NULL, 0); 579 } 580 #endif 581 582 touched = stp->st_atime; 583 if (touched < ep->tv.tv_sec) { 584 /* tty untouched since before login */ 585 touched = ep->tv.tv_sec; 586 } 587 if ((ep->idle = now - touched) < 0) 588 ep->idle = 0; 589 } 590