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 #ifdef CPU_CONSDEV 243 /* 244 * If this is the console device, attempt to ascertain 245 * the true console device dev_t. 246 */ 247 if (ep->tdev == 0) { 248 int mib[2]; 249 size_t size; 250 251 mib[0] = CTL_MACHDEP; 252 mib[1] = CPU_CONSDEV; 253 size = sizeof(dev_t); 254 (void)sysctl(mib, 2, &ep->tdev, &size, NULL, 0); 255 } 256 #endif 257 touched = stp->st_atime; 258 if (touched < ep->utmp.ut_time) { 259 /* tty untouched since before login */ 260 touched = ep->utmp.ut_time; 261 } 262 if ((ep->idle = now - touched) < 0) 263 ep->idle = 0; 264 } 265 (void)fclose(ut); 266 267 if (header || wcmd == 0) { 268 pr_header(&now, nusers); 269 if (wcmd == 0) { 270 (void)kvm_close(kd); 271 exit(0); 272 } 273 274 #define HEADER_USER "USER" 275 #define HEADER_TTY "TTY" 276 #define HEADER_FROM "FROM" 277 #define HEADER_LOGIN_IDLE "LOGIN@ IDLE " 278 #define HEADER_WHAT "WHAT\n" 279 #define WUSED (UT_NAMESIZE + UT_LINESIZE + W_DISPHOSTSIZE + \ 280 sizeof(HEADER_LOGIN_IDLE) + 3) /* header width incl. spaces */ 281 (void)printf("%-*.*s %-*.*s %-*.*s %s", 282 UT_NAMESIZE, UT_NAMESIZE, HEADER_USER, 283 UT_LINESIZE, UT_LINESIZE, HEADER_TTY, 284 W_DISPHOSTSIZE, W_DISPHOSTSIZE, HEADER_FROM, 285 HEADER_LOGIN_IDLE HEADER_WHAT); 286 } 287 288 if ((kp = kvm_getprocs(kd, KERN_PROC_ALL, 0, &nentries)) == NULL) 289 err(1, "%s", kvm_geterr(kd)); 290 for (i = 0; i < nentries; i++, kp++) { 291 if (kp->ki_stat == SIDL || kp->ki_stat == SZOMB) 292 continue; 293 for (ep = ehead; ep != NULL; ep = ep->next) { 294 if (ep->tdev == kp->ki_tdev) { 295 /* 296 * proc is associated with this terminal 297 */ 298 if (ep->kp == NULL && kp->ki_pgid == kp->ki_tpgid) { 299 /* 300 * Proc is 'most interesting' 301 */ 302 if (proc_compare(ep->kp, kp)) 303 ep->kp = kp; 304 } 305 /* 306 * Proc debug option info; add to debug 307 * list using kinfo_proc ki_spare[0] 308 * as next pointer; ptr to ptr avoids the 309 * ptr = long assumption. 310 */ 311 dkp = ep->dkp; 312 ep->dkp = kp; 313 debugproc(kp) = dkp; 314 } 315 } 316 } 317 if ((ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) == -1 && 318 ioctl(STDERR_FILENO, TIOCGWINSZ, &ws) == -1 && 319 ioctl(STDIN_FILENO, TIOCGWINSZ, &ws) == -1) || ws.ws_col == 0) 320 ttywidth = 79; 321 else 322 ttywidth = ws.ws_col - 1; 323 argwidth = ttywidth - WUSED; 324 if (argwidth < 4) 325 argwidth = 8; 326 for (ep = ehead; ep != NULL; ep = ep->next) { 327 if (ep->kp == NULL) { 328 ep->args = strdup("-"); 329 continue; 330 } 331 ep->args = fmt_argv(kvm_getargv(kd, ep->kp, argwidth), 332 ep->kp->ki_comm, MAXCOMLEN); 333 if (ep->args == NULL) 334 err(1, NULL); 335 } 336 /* sort by idle time */ 337 if (sortidle && ehead != NULL) { 338 struct entry *from, *save; 339 340 from = ehead; 341 ehead = NULL; 342 while (from != NULL) { 343 for (nextp = &ehead; 344 (*nextp) && from->idle >= (*nextp)->idle; 345 nextp = &(*nextp)->next) 346 continue; 347 save = from; 348 from = from->next; 349 save->next = *nextp; 350 *nextp = save; 351 } 352 } 353 354 for (ep = ehead; ep != NULL; ep = ep->next) { 355 char host_buf[UT_HOSTSIZE + 1]; 356 struct sockaddr_storage ss; 357 struct sockaddr *sa = (struct sockaddr *)&ss; 358 struct sockaddr_in *lsin = (struct sockaddr_in *)&ss; 359 struct sockaddr_in6 *lsin6 = (struct sockaddr_in6 *)&ss; 360 time_t t; 361 int isaddr; 362 363 host_buf[UT_HOSTSIZE] = '\0'; 364 strncpy(host_buf, ep->utmp.ut_host, UT_HOSTSIZE); 365 p = *host_buf ? host_buf : "-"; 366 if ((x_suffix = strrchr(p, ':')) != NULL) { 367 if ((dot = strchr(x_suffix, '.')) != NULL && 368 strchr(dot+1, '.') == NULL) 369 *x_suffix++ = '\0'; 370 else 371 x_suffix = NULL; 372 } 373 if (!nflag) { 374 /* Attempt to change an IP address into a name */ 375 isaddr = 0; 376 memset(&ss, '\0', sizeof(ss)); 377 if (inet_pton(AF_INET6, p, &lsin6->sin6_addr) == 1) { 378 lsin6->sin6_len = sizeof(*lsin6); 379 lsin6->sin6_family = AF_INET6; 380 isaddr = 1; 381 } else if (inet_pton(AF_INET, p, &lsin->sin_addr) == 1) { 382 lsin->sin_len = sizeof(*lsin); 383 lsin->sin_family = AF_INET; 384 isaddr = 1; 385 } 386 if (isaddr && realhostname_sa(fn, sizeof(fn), sa, 387 sa->sa_len) == HOSTNAME_FOUND) 388 p = fn; 389 } 390 if (x_suffix) { 391 (void)snprintf(buf, sizeof(buf), "%s:%s", p, x_suffix); 392 p = buf; 393 } 394 if (dflag) { 395 for (dkp = ep->dkp; dkp != NULL; dkp = debugproc(dkp)) { 396 const char *ptr; 397 398 ptr = fmt_argv(kvm_getargv(kd, dkp, argwidth), 399 dkp->ki_comm, MAXCOMLEN); 400 if (ptr == NULL) 401 ptr = "-"; 402 (void)printf("\t\t%-9d %s\n", 403 dkp->ki_pid, ptr); 404 } 405 } 406 (void)printf("%-*.*s %-*.*s %-*.*s ", 407 UT_NAMESIZE, UT_NAMESIZE, ep->utmp.ut_name, 408 UT_LINESIZE, UT_LINESIZE, 409 strncmp(ep->utmp.ut_line, "tty", 3) && 410 strncmp(ep->utmp.ut_line, "cua", 3) ? 411 ep->utmp.ut_line : ep->utmp.ut_line + 3, 412 W_DISPHOSTSIZE, W_DISPHOSTSIZE, *p ? p : "-"); 413 t = _time_to_time32(ep->utmp.ut_time); 414 pr_attime(&t, &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(time_t *nowp, int nusers) 424 { 425 double avenrun[3]; 426 time_t uptime; 427 int days, hrs, i, mins, secs; 428 int mib[2]; 429 size_t size; 430 char buf[256]; 431 432 /* 433 * Print time of day. 434 */ 435 if (strftime(buf, sizeof(buf), 436 use_ampm ? "%l:%M%p" : "%k:%M", localtime(nowp)) != 0) 437 (void)printf("%s ", buf); 438 /* 439 * Print how long system has been up. 440 * (Found by looking getting "boottime" from the kernel) 441 */ 442 mib[0] = CTL_KERN; 443 mib[1] = KERN_BOOTTIME; 444 size = sizeof(boottime); 445 if (sysctl(mib, 2, &boottime, &size, NULL, 0) != -1 && 446 boottime.tv_sec != 0) { 447 uptime = now - boottime.tv_sec; 448 if (uptime > 60) 449 uptime += 30; 450 days = uptime / 86400; 451 uptime %= 86400; 452 hrs = uptime / 3600; 453 uptime %= 3600; 454 mins = uptime / 60; 455 secs = uptime % 60; 456 (void)printf(" up"); 457 if (days > 0) 458 (void)printf(" %d day%s,", days, days > 1 ? "s" : ""); 459 if (hrs > 0 && mins > 0) 460 (void)printf(" %2d:%02d,", hrs, mins); 461 else if (hrs > 0) 462 (void)printf(" %d hr%s,", hrs, hrs > 1 ? "s" : ""); 463 else if (mins > 0) 464 (void)printf(" %d min%s,", mins, mins > 1 ? "s" : ""); 465 else 466 (void)printf(" %d sec%s,", secs, secs > 1 ? "s" : ""); 467 } 468 469 /* Print number of users logged in to system */ 470 (void)printf(" %d user%s", nusers, nusers == 1 ? "" : "s"); 471 472 /* 473 * Print 1, 5, and 15 minute load averages. 474 */ 475 if (getloadavg(avenrun, sizeof(avenrun) / sizeof(avenrun[0])) == -1) 476 (void)printf(", no load average information available\n"); 477 else { 478 (void)printf(", load averages:"); 479 for (i = 0; i < (int)(sizeof(avenrun) / sizeof(avenrun[0])); i++) { 480 if (use_comma && i > 0) 481 (void)printf(","); 482 (void)printf(" %.2f", avenrun[i]); 483 } 484 (void)printf("\n"); 485 } 486 } 487 488 static struct stat * 489 ttystat(char *line, int sz) 490 { 491 static struct stat sb; 492 char ttybuf[MAXPATHLEN]; 493 494 (void)snprintf(ttybuf, sizeof(ttybuf), "%s%.*s", _PATH_DEV, sz, line); 495 if (stat(ttybuf, &sb) == 0) { 496 return (&sb); 497 } else 498 return (NULL); 499 } 500 501 static void 502 usage(int wcmd) 503 { 504 if (wcmd) 505 (void)fprintf(stderr, 506 "usage: w [-dhin] [-M core] [-N system] [user ...]\n"); 507 else 508 (void)fprintf(stderr, "usage: uptime\n"); 509 exit(1); 510 } 511 512 static int 513 this_is_uptime(const char *s) 514 { 515 const char *u; 516 517 if ((u = strrchr(s, '/')) != NULL) 518 ++u; 519 else 520 u = s; 521 if (strcmp(u, "uptime") == 0) 522 return (0); 523 return (-1); 524 } 525