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. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #include <sys/cdefs.h> 35 36 __FBSDID("$FreeBSD$"); 37 38 #ifndef lint 39 static const char copyright[] = 40 "@(#) Copyright (c) 1980, 1991, 1993, 1994\n\ 41 The Regents of the University of California. All rights reserved.\n"; 42 #endif 43 44 #ifndef lint 45 static const char sccsid[] = "@(#)w.c 8.4 (Berkeley) 4/16/94"; 46 #endif 47 48 /* 49 * w - print system status (who and what) 50 * 51 * This program is similar to the systat command on Tenex/Tops 10/20 52 * 53 */ 54 #include <sys/param.h> 55 #include <sys/time.h> 56 #include <sys/stat.h> 57 #include <sys/sysctl.h> 58 #include <sys/proc.h> 59 #include <sys/user.h> 60 #include <sys/ioctl.h> 61 #include <sys/socket.h> 62 #include <sys/tty.h> 63 64 #include <machine/cpu.h> 65 #include <netinet/in.h> 66 #include <arpa/inet.h> 67 #include <arpa/nameser.h> 68 69 #include <ctype.h> 70 #include <err.h> 71 #include <errno.h> 72 #include <fcntl.h> 73 #include <kvm.h> 74 #include <langinfo.h> 75 #include <libutil.h> 76 #include <limits.h> 77 #include <locale.h> 78 #include <netdb.h> 79 #include <nlist.h> 80 #include <paths.h> 81 #include <resolv.h> 82 #include <stdio.h> 83 #include <stdlib.h> 84 #include <string.h> 85 #include <unistd.h> 86 #include <utmp.h> 87 #include <vis.h> 88 89 #include "extern.h" 90 91 struct timeval boottime; 92 struct utmp utmp; 93 struct winsize ws; 94 kvm_t *kd; 95 time_t now; /* the current time of day */ 96 time_t uptime; /* time of last reboot & elapsed time since */ 97 int ttywidth; /* width of tty */ 98 int argwidth; /* width of tty */ 99 int header = 1; /* true if -h flag: don't print heading */ 100 int nflag; /* true if -n flag: don't convert addrs */ 101 int dflag; /* true if -d flag: output debug info */ 102 int sortidle; /* sort by idle time */ 103 int use_ampm; /* use AM/PM time */ 104 int use_comma; /* use comma as floats separator */ 105 char **sel_users; /* login array of particular users selected */ 106 107 /* 108 * One of these per active utmp entry. 109 */ 110 struct entry { 111 struct entry *next; 112 struct utmp utmp; 113 dev_t tdev; /* dev_t of terminal */ 114 time_t idle; /* idle time of terminal in seconds */ 115 struct kinfo_proc *kp; /* `most interesting' proc */ 116 char *args; /* arg list of interesting process */ 117 struct kinfo_proc *dkp; /* debug option proc list */ 118 } *ep, *ehead = NULL, **nextp = &ehead; 119 120 #define debugproc(p) *((struct kinfo_proc **)&(p)->ki_spare[0]) 121 122 /* W_DISPHOSTSIZE should not be greater than UT_HOSTSIZE */ 123 #define W_DISPHOSTSIZE 16 124 125 static void pr_header __P((time_t *, int)); 126 static struct stat *ttystat __P((char *, int)); 127 static void usage __P((int)); 128 static int this_is_uptime __P((const char *s)); 129 130 char *fmt_argv __P((char **, char *, int)); /* ../../bin/ps/fmt.c */ 131 132 int 133 main(argc, argv) 134 int argc; 135 char **argv; 136 { 137 struct kinfo_proc *kp; 138 struct kinfo_proc *dkp; 139 struct stat *stp; 140 FILE *ut; 141 time_t touched; 142 int ch, i, nentries, nusers, wcmd, longidle, dropgid; 143 const char *memf, *nlistf, *p; 144 char *x_suffix; 145 char buf[MAXHOSTNAMELEN], errbuf[_POSIX2_LINE_MAX]; 146 char fn[MAXHOSTNAMELEN]; 147 char *dot; 148 149 (void)setlocale(LC_ALL, ""); 150 use_ampm = (*nl_langinfo(T_FMT_AMPM) != '\0'); 151 use_comma = (*nl_langinfo(RADIXCHAR) != ','); 152 153 /* Are we w(1) or uptime(1)? */ 154 if (this_is_uptime(argv[0]) == 0) { 155 wcmd = 0; 156 p = ""; 157 } else { 158 wcmd = 1; 159 p = "dhiflM:N:nsuw"; 160 } 161 162 dropgid = 0; 163 memf = nlistf = _PATH_DEVNULL; 164 while ((ch = getopt(argc, argv, p)) != -1) 165 switch (ch) { 166 case 'd': 167 dflag = 1; 168 break; 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 dropgid = 1; 179 break; 180 case 'N': 181 nlistf = optarg; 182 dropgid = 1; 183 break; 184 case 'n': 185 nflag = 1; 186 break; 187 case 'f': case 'l': case 's': case 'u': case 'w': 188 warnx("[-flsuw] no longer supported"); 189 /* FALLTHROUGH */ 190 case '?': 191 default: 192 usage(wcmd); 193 } 194 argc -= optind; 195 argv += optind; 196 197 if (!(_res.options & RES_INIT)) 198 res_init(); 199 _res.retrans = 2; /* resolver timeout to 2 seconds per try */ 200 _res.retry = 1; /* only try once.. */ 201 202 /* 203 * Discard setgid privileges if not the running kernel so that bad 204 * guys can't print interesting stuff from kernel memory. 205 */ 206 if (dropgid) 207 setgid(getgid()); 208 209 if ((kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf)) == NULL) 210 errx(1, "%s", errbuf); 211 212 (void)time(&now); 213 if ((ut = fopen(_PATH_UTMP, "r")) == NULL) 214 err(1, "%s", _PATH_UTMP); 215 216 if (*argv) 217 sel_users = argv; 218 219 for (nusers = 0; fread(&utmp, sizeof(utmp), 1, ut);) { 220 if (utmp.ut_name[0] == '\0') 221 continue; 222 if (!(stp = ttystat(utmp.ut_line, UT_LINESIZE))) 223 continue; /* corrupted record */ 224 ++nusers; 225 if (wcmd == 0) 226 continue; 227 if (sel_users) { 228 int usermatch; 229 char **user; 230 231 usermatch = 0; 232 for (user = sel_users; !usermatch && *user; user++) 233 if (!strncmp(utmp.ut_name, *user, UT_NAMESIZE)) 234 usermatch = 1; 235 if (!usermatch) 236 continue; 237 } 238 if ((ep = calloc(1, sizeof(struct entry))) == NULL) 239 errx(1, "calloc"); 240 *nextp = ep; 241 nextp = &ep->next; 242 memmove(&ep->utmp, &utmp, sizeof(struct utmp)); 243 ep->tdev = stp->st_rdev; 244 #ifdef CPU_CONSDEV 245 /* 246 * If this is the console device, attempt to ascertain 247 * the true console device dev_t. 248 */ 249 if (ep->tdev == 0) { 250 int mib[2]; 251 size_t size; 252 253 mib[0] = CTL_MACHDEP; 254 mib[1] = CPU_CONSDEV; 255 size = sizeof(dev_t); 256 (void)sysctl(mib, 2, &ep->tdev, &size, NULL, 0); 257 } 258 #endif 259 touched = stp->st_atime; 260 if (touched < ep->utmp.ut_time) { 261 /* tty untouched since before login */ 262 touched = ep->utmp.ut_time; 263 } 264 if ((ep->idle = now - touched) < 0) 265 ep->idle = 0; 266 } 267 (void)fclose(ut); 268 269 if (header || wcmd == 0) { 270 pr_header(&now, nusers); 271 if (wcmd == 0) { 272 (void)kvm_close(kd); 273 exit(0); 274 } 275 276 #define HEADER_USER "USER" 277 #define HEADER_TTY "TTY" 278 #define HEADER_FROM "FROM" 279 #define HEADER_LOGIN_IDLE "LOGIN@ IDLE " 280 #define HEADER_WHAT "WHAT\n" 281 #define WUSED (UT_NAMESIZE + UT_LINESIZE + W_DISPHOSTSIZE + \ 282 sizeof(HEADER_LOGIN_IDLE) + 3) /* header width incl. spaces */ 283 (void)printf("%-*.*s %-*.*s %-*.*s %s", 284 UT_NAMESIZE, UT_NAMESIZE, HEADER_USER, 285 UT_LINESIZE, UT_LINESIZE, HEADER_TTY, 286 W_DISPHOSTSIZE, W_DISPHOSTSIZE, HEADER_FROM, 287 HEADER_LOGIN_IDLE HEADER_WHAT); 288 } 289 290 if ((kp = kvm_getprocs(kd, KERN_PROC_ALL, 0, &nentries)) == NULL) 291 err(1, "%s", kvm_geterr(kd)); 292 for (i = 0; i < nentries; i++, kp++) { 293 if (kp->ki_stat == SIDL || kp->ki_stat == SZOMB) 294 continue; 295 for (ep = ehead; ep != NULL; ep = ep->next) { 296 if (ep->tdev == kp->ki_tdev) { 297 /* 298 * proc is associated with this terminal 299 */ 300 if (ep->kp == NULL && kp->ki_pgid == kp->ki_tpgid) { 301 /* 302 * Proc is 'most interesting' 303 */ 304 if (proc_compare(ep->kp, kp)) 305 ep->kp = kp; 306 } 307 /* 308 * Proc debug option info; add to debug 309 * list using kinfo_proc ki_spare[0] 310 * as next pointer; ptr to ptr avoids the 311 * ptr = long assumption. 312 */ 313 dkp = ep->dkp; 314 ep->dkp = kp; 315 debugproc(kp) = dkp; 316 } 317 } 318 } 319 if ((ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) == -1 && 320 ioctl(STDERR_FILENO, TIOCGWINSZ, &ws) == -1 && 321 ioctl(STDIN_FILENO, TIOCGWINSZ, &ws) == -1) || ws.ws_col == 0) 322 ttywidth = 79; 323 else 324 ttywidth = ws.ws_col - 1; 325 argwidth = ttywidth - WUSED; 326 if (argwidth < 4) 327 argwidth = 8; 328 for (ep = ehead; ep != NULL; ep = ep->next) { 329 if (ep->kp == NULL) { 330 ep->args = strdup("-"); 331 continue; 332 } 333 ep->args = fmt_argv(kvm_getargv(kd, ep->kp, argwidth), 334 ep->kp->ki_comm, MAXCOMLEN); 335 if (ep->args == NULL) 336 err(1, NULL); 337 } 338 /* sort by idle time */ 339 if (sortidle && ehead != NULL) { 340 struct entry *from, *save; 341 342 from = ehead; 343 ehead = NULL; 344 while (from != NULL) { 345 for (nextp = &ehead; 346 (*nextp) && from->idle >= (*nextp)->idle; 347 nextp = &(*nextp)->next) 348 continue; 349 save = from; 350 from = from->next; 351 save->next = *nextp; 352 *nextp = save; 353 } 354 } 355 356 for (ep = ehead; ep != NULL; ep = ep->next) { 357 char host_buf[UT_HOSTSIZE + 1]; 358 struct sockaddr_storage ss; 359 struct sockaddr *sa = (struct sockaddr *)&ss; 360 struct sockaddr_in *lsin = (struct sockaddr_in *)&ss; 361 struct sockaddr_in6 *lsin6 = (struct sockaddr_in6 *)&ss; 362 int isaddr; 363 364 host_buf[UT_HOSTSIZE] = '\0'; 365 strncpy(host_buf, ep->utmp.ut_host, UT_HOSTSIZE); 366 p = *host_buf ? host_buf : "-"; 367 if ((x_suffix = strrchr(p, ':')) != NULL) { 368 if ((dot = strchr(x_suffix, '.')) != NULL && 369 strchr(dot+1, '.') == NULL) 370 *x_suffix++ = '\0'; 371 else 372 x_suffix = NULL; 373 } 374 if (!nflag) { 375 /* Attempt to change an IP address into a name */ 376 isaddr = 0; 377 memset(&ss, '\0', sizeof(ss)); 378 if (inet_pton(AF_INET6, p, &lsin6->sin6_addr) == 1) { 379 lsin6->sin6_len = sizeof(*lsin6); 380 lsin6->sin6_family = AF_INET6; 381 isaddr = 1; 382 } else if (inet_pton(AF_INET, p, &lsin->sin_addr) == 1) { 383 lsin->sin_len = sizeof(*lsin); 384 lsin->sin_family = AF_INET; 385 isaddr = 1; 386 } 387 if (isaddr && realhostname_sa(fn, sizeof(fn), sa, 388 sa->sa_len) == HOSTNAME_FOUND) 389 p = fn; 390 } 391 if (x_suffix) { 392 (void)snprintf(buf, sizeof(buf), "%s:%s", p, x_suffix); 393 p = buf; 394 } 395 if (dflag) { 396 for (dkp = ep->dkp; dkp != NULL; dkp = debugproc(dkp)) { 397 const char *ptr; 398 399 ptr = fmt_argv(kvm_getargv(kd, dkp, argwidth), 400 dkp->ki_comm, MAXCOMLEN); 401 if (ptr == NULL) 402 ptr = "-"; 403 (void)printf("\t\t%-9d %s\n", 404 dkp->ki_pid, ptr); 405 } 406 } 407 (void)printf("%-*.*s %-*.*s %-*.*s ", 408 UT_NAMESIZE, UT_NAMESIZE, ep->utmp.ut_name, 409 UT_LINESIZE, UT_LINESIZE, 410 strncmp(ep->utmp.ut_line, "tty", 3) && 411 strncmp(ep->utmp.ut_line, "cua", 3) ? 412 ep->utmp.ut_line : ep->utmp.ut_line + 3, 413 W_DISPHOSTSIZE, W_DISPHOSTSIZE, *p ? p : "-"); 414 pr_attime(&ep->utmp.ut_time, &now); 415 longidle = pr_idle(ep->idle); 416 (void)printf("%.*s\n", argwidth - longidle, ep->args); 417 } 418 (void)kvm_close(kd); 419 exit(0); 420 } 421 422 static void 423 pr_header(nowp, nusers) 424 time_t *nowp; 425 int nusers; 426 { 427 double avenrun[3]; 428 time_t luptime; 429 int days, hrs, i, mins, secs; 430 int mib[2]; 431 size_t size; 432 char buf[256]; 433 434 /* 435 * Print time of day. 436 */ 437 (void)strftime(buf, sizeof(buf) - 1, 438 use_ampm ? "%l:%M%p" : "%k:%M", localtime(nowp)); 439 buf[sizeof(buf) - 1] = '\0'; 440 (void)printf("%s ", buf); 441 442 /* 443 * Print how long system has been up. 444 * (Found by looking getting "boottime" from the kernel) 445 */ 446 mib[0] = CTL_KERN; 447 mib[1] = KERN_BOOTTIME; 448 size = sizeof(boottime); 449 if (sysctl(mib, 2, &boottime, &size, NULL, 0) != -1 && 450 boottime.tv_sec != 0) { 451 luptime = now - boottime.tv_sec; 452 if (luptime > 60) 453 luptime += 30; 454 days = luptime / 86400; 455 luptime %= 86400; 456 hrs = luptime / 3600; 457 luptime %= 3600; 458 mins = luptime / 60; 459 secs = luptime % 60; 460 (void)printf(" up"); 461 if (days > 0) 462 (void)printf(" %d day%s,", days, days > 1 ? "s" : ""); 463 if (hrs > 0 && mins > 0) 464 (void)printf(" %2d:%02d,", hrs, mins); 465 else if (hrs > 0) 466 (void)printf(" %d hr%s,", hrs, hrs > 1 ? "s" : ""); 467 else if (mins > 0) 468 (void)printf(" %d min%s,", mins, mins > 1 ? "s" : ""); 469 else 470 (void)printf(" %d sec%s,", secs, secs > 1 ? "s" : ""); 471 } 472 473 /* Print number of users logged in to system */ 474 (void)printf(" %d user%s", nusers, nusers == 1 ? "" : "s"); 475 476 /* 477 * Print 1, 5, and 15 minute load averages. 478 */ 479 if (getloadavg(avenrun, sizeof(avenrun) / sizeof(avenrun[0])) == -1) 480 (void)printf(", no load average information available\n"); 481 else { 482 (void)printf(", load averages:"); 483 for (i = 0; i < (int)(sizeof(avenrun) / sizeof(avenrun[0])); i++) { 484 if (use_comma && i > 0) 485 (void)printf(","); 486 (void)printf(" %.2f", avenrun[i]); 487 } 488 (void)printf("\n"); 489 } 490 } 491 492 static struct stat * 493 ttystat(line, sz) 494 char *line; 495 int sz; 496 { 497 static struct stat sb; 498 char ttybuf[MAXPATHLEN]; 499 500 (void)snprintf(ttybuf, sizeof(ttybuf), "%s%.*s", _PATH_DEV, sz, line); 501 if (stat(ttybuf, &sb)) { 502 warn("%s", ttybuf); 503 return (NULL); 504 } 505 return (&sb); 506 } 507 508 static void 509 usage(wcmd) 510 int wcmd; 511 { 512 if (wcmd) 513 (void)fprintf(stderr, 514 "usage: w [-dhin] [-M core] [-N system] [user ...]\n"); 515 else 516 (void)fprintf(stderr, "usage: uptime\n"); 517 exit(1); 518 } 519 520 static int 521 this_is_uptime(s) 522 const char *s; 523 { 524 const char *u; 525 526 if ((u = strrchr(s, '/')) != NULL) 527 ++u; 528 else 529 u = s; 530 if (strcmp(u, "uptime") == 0) 531 return (0); 532 return (-1); 533 } 534