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 <timeconv.h> 86 #include <unistd.h> 87 #include <utmp.h> 88 #include <vis.h> 89 90 #include "extern.h" 91 92 struct timeval boottime; 93 struct utmp utmp; 94 struct winsize ws; 95 kvm_t *kd; 96 time_t now; /* the current time of day */ 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_udata) 121 122 /* W_DISPHOSTSIZE should not be greater than UT_HOSTSIZE */ 123 #define W_DISPHOSTSIZE 16 124 125 static void pr_header(time_t *, int); 126 static struct stat *ttystat(char *, int); 127 static void usage(int); 128 static int this_is_uptime(const char *s); 129 130 char *fmt_argv(char **, char *, int); /* ../../bin/ps/fmt.c */ 131 132 int 133 main(int argc, char *argv[]) 134 { 135 struct kinfo_proc *kp; 136 struct kinfo_proc *dkp; 137 struct stat *stp; 138 FILE *ut; 139 time_t touched; 140 int ch, i, nentries, nusers, wcmd, longidle, dropgid; 141 const char *memf, *nlistf, *p; 142 char *x_suffix; 143 char buf[MAXHOSTNAMELEN], errbuf[_POSIX2_LINE_MAX]; 144 char fn[MAXHOSTNAMELEN]; 145 char *dot; 146 147 (void)setlocale(LC_ALL, ""); 148 use_ampm = (*nl_langinfo(T_FMT_AMPM) != '\0'); 149 use_comma = (*nl_langinfo(RADIXCHAR) != ','); 150 151 /* Are we w(1) or uptime(1)? */ 152 if (this_is_uptime(argv[0]) == 0) { 153 wcmd = 0; 154 p = ""; 155 } else { 156 wcmd = 1; 157 p = "dhiflM:N:nsuw"; 158 } 159 160 dropgid = 0; 161 memf = nlistf = _PATH_DEVNULL; 162 while ((ch = getopt(argc, argv, p)) != -1) 163 switch (ch) { 164 case 'd': 165 dflag = 1; 166 break; 167 case 'h': 168 header = 0; 169 break; 170 case 'i': 171 sortidle = 1; 172 break; 173 case 'M': 174 header = 0; 175 memf = optarg; 176 dropgid = 1; 177 break; 178 case 'N': 179 nlistf = optarg; 180 dropgid = 1; 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 (!(_res.options & RES_INIT)) 196 res_init(); 197 _res.retrans = 2; /* resolver timeout to 2 seconds per try */ 198 _res.retry = 1; /* only try once.. */ 199 200 /* 201 * Discard setgid privileges if not the running kernel so that bad 202 * guys can't print interesting stuff from kernel memory. 203 */ 204 if (dropgid) 205 setgid(getgid()); 206 207 if ((kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf)) == NULL) 208 errx(1, "%s", errbuf); 209 210 (void)time(&now); 211 if ((ut = fopen(_PATH_UTMP, "r")) == NULL) 212 err(1, "%s", _PATH_UTMP); 213 214 if (*argv) 215 sel_users = argv; 216 217 for (nusers = 0; fread(&utmp, sizeof(utmp), 1, ut);) { 218 if (utmp.ut_name[0] == '\0') 219 continue; 220 if (!(stp = ttystat(utmp.ut_line, UT_LINESIZE))) 221 continue; /* corrupted record */ 222 ++nusers; 223 if (wcmd == 0) 224 continue; 225 if (sel_users) { 226 int usermatch; 227 char **user; 228 229 usermatch = 0; 230 for (user = sel_users; !usermatch && *user; user++) 231 if (!strncmp(utmp.ut_name, *user, UT_NAMESIZE)) 232 usermatch = 1; 233 if (!usermatch) 234 continue; 235 } 236 if ((ep = calloc(1, sizeof(struct entry))) == NULL) 237 errx(1, "calloc"); 238 *nextp = ep; 239 nextp = &ep->next; 240 memmove(&ep->utmp, &utmp, sizeof(struct utmp)); 241 ep->tdev = stp->st_rdev; 242 /* 243 * If this is the console device, attempt to ascertain 244 * the true console device dev_t. 245 */ 246 if (ep->tdev == 0) { 247 size_t size; 248 249 size = sizeof(dev_t); 250 (void)sysctlbyname("machdep.consdev", &ep->tdev, &size, NULL, 0); 251 } 252 touched = stp->st_atime; 253 if (touched < ep->utmp.ut_time) { 254 /* tty untouched since before login */ 255 touched = ep->utmp.ut_time; 256 } 257 if ((ep->idle = now - touched) < 0) 258 ep->idle = 0; 259 } 260 (void)fclose(ut); 261 262 if (header || wcmd == 0) { 263 pr_header(&now, nusers); 264 if (wcmd == 0) { 265 (void)kvm_close(kd); 266 exit(0); 267 } 268 269 #define HEADER_USER "USER" 270 #define HEADER_TTY "TTY" 271 #define HEADER_FROM "FROM" 272 #define HEADER_LOGIN_IDLE "LOGIN@ IDLE " 273 #define HEADER_WHAT "WHAT\n" 274 #define WUSED (UT_NAMESIZE + UT_LINESIZE + W_DISPHOSTSIZE + \ 275 sizeof(HEADER_LOGIN_IDLE) + 3) /* header width incl. spaces */ 276 (void)printf("%-*.*s %-*.*s %-*.*s %s", 277 UT_NAMESIZE, UT_NAMESIZE, HEADER_USER, 278 UT_LINESIZE, UT_LINESIZE, HEADER_TTY, 279 W_DISPHOSTSIZE, W_DISPHOSTSIZE, HEADER_FROM, 280 HEADER_LOGIN_IDLE HEADER_WHAT); 281 } 282 283 if ((kp = kvm_getprocs(kd, KERN_PROC_ALL, 0, &nentries)) == NULL) 284 err(1, "%s", kvm_geterr(kd)); 285 for (i = 0; i < nentries; i++, kp++) { 286 if (kp->ki_stat == SIDL || kp->ki_stat == SZOMB) 287 continue; 288 for (ep = ehead; ep != NULL; ep = ep->next) { 289 if (ep->tdev == kp->ki_tdev) { 290 /* 291 * proc is associated with this terminal 292 */ 293 if (ep->kp == NULL && kp->ki_pgid == kp->ki_tpgid) { 294 /* 295 * Proc is 'most interesting' 296 */ 297 if (proc_compare(ep->kp, kp)) 298 ep->kp = kp; 299 } 300 /* 301 * Proc debug option info; add to debug 302 * list using kinfo_proc ki_spare[0] 303 * as next pointer; ptr to ptr avoids the 304 * ptr = long assumption. 305 */ 306 dkp = ep->dkp; 307 ep->dkp = kp; 308 debugproc(kp) = dkp; 309 } 310 } 311 } 312 if ((ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) == -1 && 313 ioctl(STDERR_FILENO, TIOCGWINSZ, &ws) == -1 && 314 ioctl(STDIN_FILENO, TIOCGWINSZ, &ws) == -1) || ws.ws_col == 0) 315 ttywidth = 79; 316 else 317 ttywidth = ws.ws_col - 1; 318 argwidth = ttywidth - WUSED; 319 if (argwidth < 4) 320 argwidth = 8; 321 for (ep = ehead; ep != NULL; ep = ep->next) { 322 if (ep->kp == NULL) { 323 ep->args = strdup("-"); 324 continue; 325 } 326 ep->args = fmt_argv(kvm_getargv(kd, ep->kp, argwidth), 327 ep->kp->ki_comm, MAXCOMLEN); 328 if (ep->args == NULL) 329 err(1, NULL); 330 } 331 /* sort by idle time */ 332 if (sortidle && ehead != NULL) { 333 struct entry *from, *save; 334 335 from = ehead; 336 ehead = NULL; 337 while (from != NULL) { 338 for (nextp = &ehead; 339 (*nextp) && from->idle >= (*nextp)->idle; 340 nextp = &(*nextp)->next) 341 continue; 342 save = from; 343 from = from->next; 344 save->next = *nextp; 345 *nextp = save; 346 } 347 } 348 349 for (ep = ehead; ep != NULL; ep = ep->next) { 350 char host_buf[UT_HOSTSIZE + 1]; 351 struct sockaddr_storage ss; 352 struct sockaddr *sa = (struct sockaddr *)&ss; 353 struct sockaddr_in *lsin = (struct sockaddr_in *)&ss; 354 struct sockaddr_in6 *lsin6 = (struct sockaddr_in6 *)&ss; 355 time_t t; 356 int isaddr; 357 358 host_buf[UT_HOSTSIZE] = '\0'; 359 strncpy(host_buf, ep->utmp.ut_host, UT_HOSTSIZE); 360 p = *host_buf ? host_buf : "-"; 361 if ((x_suffix = strrchr(p, ':')) != NULL) { 362 if ((dot = strchr(x_suffix, '.')) != NULL && 363 strchr(dot+1, '.') == NULL) 364 *x_suffix++ = '\0'; 365 else 366 x_suffix = NULL; 367 } 368 if (!nflag) { 369 /* Attempt to change an IP address into a name */ 370 isaddr = 0; 371 memset(&ss, '\0', sizeof(ss)); 372 if (inet_pton(AF_INET6, p, &lsin6->sin6_addr) == 1) { 373 lsin6->sin6_len = sizeof(*lsin6); 374 lsin6->sin6_family = AF_INET6; 375 isaddr = 1; 376 } else if (inet_pton(AF_INET, p, &lsin->sin_addr) == 1) { 377 lsin->sin_len = sizeof(*lsin); 378 lsin->sin_family = AF_INET; 379 isaddr = 1; 380 } 381 if (isaddr && realhostname_sa(fn, sizeof(fn), sa, 382 sa->sa_len) == HOSTNAME_FOUND) 383 p = fn; 384 } 385 if (x_suffix) { 386 (void)snprintf(buf, sizeof(buf), "%s:%s", p, x_suffix); 387 p = buf; 388 } 389 if (dflag) { 390 for (dkp = ep->dkp; dkp != NULL; dkp = debugproc(dkp)) { 391 const char *ptr; 392 393 ptr = fmt_argv(kvm_getargv(kd, dkp, argwidth), 394 dkp->ki_comm, MAXCOMLEN); 395 if (ptr == NULL) 396 ptr = "-"; 397 (void)printf("\t\t%-9d %s\n", 398 dkp->ki_pid, ptr); 399 } 400 } 401 (void)printf("%-*.*s %-*.*s %-*.*s ", 402 UT_NAMESIZE, UT_NAMESIZE, ep->utmp.ut_name, 403 UT_LINESIZE, UT_LINESIZE, 404 strncmp(ep->utmp.ut_line, "tty", 3) && 405 strncmp(ep->utmp.ut_line, "cua", 3) ? 406 ep->utmp.ut_line : ep->utmp.ut_line + 3, 407 W_DISPHOSTSIZE, W_DISPHOSTSIZE, *p ? p : "-"); 408 t = _time_to_time32(ep->utmp.ut_time); 409 pr_attime(&t, &now); 410 longidle = pr_idle(ep->idle); 411 (void)printf("%.*s\n", argwidth - longidle, ep->args); 412 } 413 (void)kvm_close(kd); 414 exit(0); 415 } 416 417 static void 418 pr_header(time_t *nowp, int nusers) 419 { 420 double avenrun[3]; 421 time_t uptime; 422 struct timespec tp; 423 int days, hrs, i, mins, secs; 424 char buf[256]; 425 426 /* 427 * Print time of day. 428 */ 429 if (strftime(buf, sizeof(buf), 430 use_ampm ? "%l:%M%p" : "%k:%M", localtime(nowp)) != 0) 431 (void)printf("%s ", buf); 432 /* 433 * Print how long system has been up. 434 */ 435 if (clock_gettime(CLOCK_MONOTONIC, &tp) != -1) { 436 uptime = tp.tv_sec; 437 if (uptime > 60) 438 uptime += 30; 439 days = uptime / 86400; 440 uptime %= 86400; 441 hrs = uptime / 3600; 442 uptime %= 3600; 443 mins = uptime / 60; 444 secs = uptime % 60; 445 (void)printf(" up"); 446 if (days > 0) 447 (void)printf(" %d day%s,", days, days > 1 ? "s" : ""); 448 if (hrs > 0 && mins > 0) 449 (void)printf(" %2d:%02d,", hrs, mins); 450 else if (hrs > 0) 451 (void)printf(" %d hr%s,", hrs, hrs > 1 ? "s" : ""); 452 else if (mins > 0) 453 (void)printf(" %d min%s,", mins, mins > 1 ? "s" : ""); 454 else 455 (void)printf(" %d sec%s,", secs, secs > 1 ? "s" : ""); 456 } 457 458 /* Print number of users logged in to system */ 459 (void)printf(" %d user%s", nusers, nusers == 1 ? "" : "s"); 460 461 /* 462 * Print 1, 5, and 15 minute load averages. 463 */ 464 if (getloadavg(avenrun, sizeof(avenrun) / sizeof(avenrun[0])) == -1) 465 (void)printf(", no load average information available\n"); 466 else { 467 (void)printf(", load averages:"); 468 for (i = 0; i < (int)(sizeof(avenrun) / sizeof(avenrun[0])); i++) { 469 if (use_comma && i > 0) 470 (void)printf(","); 471 (void)printf(" %.2f", avenrun[i]); 472 } 473 (void)printf("\n"); 474 } 475 } 476 477 static struct stat * 478 ttystat(char *line, int sz) 479 { 480 static struct stat sb; 481 char ttybuf[MAXPATHLEN]; 482 483 (void)snprintf(ttybuf, sizeof(ttybuf), "%s%.*s", _PATH_DEV, sz, line); 484 if (stat(ttybuf, &sb) == 0) { 485 return (&sb); 486 } else 487 return (NULL); 488 } 489 490 static void 491 usage(int wcmd) 492 { 493 if (wcmd) 494 (void)fprintf(stderr, 495 "usage: w [-dhin] [-M core] [-N system] [user ...]\n"); 496 else 497 (void)fprintf(stderr, "usage: uptime\n"); 498 exit(1); 499 } 500 501 static int 502 this_is_uptime(const char *s) 503 { 504 const char *u; 505 506 if ((u = strrchr(s, '/')) != NULL) 507 ++u; 508 else 509 u = s; 510 if (strcmp(u, "uptime") == 0) 511 return (0); 512 return (-1); 513 } 514