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 #ifndef lint 35 static const char copyright[] = 36 "@(#) Copyright (c) 1980, 1991, 1993, 1994\n\ 37 The Regents of the University of California. All rights reserved.\n"; 38 #endif /* not lint */ 39 40 #ifndef lint 41 #if 0 42 static char sccsid[] = "@(#)w.c 8.4 (Berkeley) 4/16/94"; 43 #endif 44 static const char rcsid[] = 45 "$FreeBSD$"; 46 #endif /* not lint */ 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 68 #include <ctype.h> 69 #include <err.h> 70 #include <errno.h> 71 #include <fcntl.h> 72 #include <kvm.h> 73 #include <langinfo.h> 74 #include <libutil.h> 75 #include <limits.h> 76 #include <locale.h> 77 #include <netdb.h> 78 #include <nlist.h> 79 #include <paths.h> 80 #include <stdio.h> 81 #include <stdlib.h> 82 #include <string.h> 83 #include <unistd.h> 84 #include <utmp.h> 85 #include <vis.h> 86 87 #include <arpa/nameser.h> 88 #include <resolv.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 time_t uptime; /* time of last reboot & elapsed time since */ 98 int ttywidth; /* width of tty */ 99 int argwidth; /* width of tty */ 100 int header = 1; /* true if -h flag: don't print heading */ 101 int nflag; /* true if -n flag: don't convert addrs */ 102 int dflag; /* true if -d flag: output debug info */ 103 int sortidle; /* sort by idle time */ 104 int use_ampm; /* use AM/PM time */ 105 int use_comma; /* use comma as floats separator */ 106 char **sel_users; /* login array of particular users selected */ 107 108 /* 109 * One of these per active utmp entry. 110 */ 111 struct entry { 112 struct entry *next; 113 struct utmp utmp; 114 dev_t tdev; /* dev_t of terminal */ 115 time_t idle; /* idle time of terminal in seconds */ 116 struct kinfo_proc *kp; /* `most interesting' proc */ 117 char *args; /* arg list of interesting process */ 118 struct kinfo_proc *dkp; /* debug option proc list */ 119 } *ep, *ehead = NULL, **nextp = &ehead; 120 121 #define debugproc(p) *((struct kinfo_proc **)&(p)->ki_spare[0]) 122 123 /* W_DISPHOSTSIZE should not be greater than UT_HOSTSIZE */ 124 #define W_DISPHOSTSIZE 16 125 126 static void pr_header __P((time_t *, int)); 127 static struct stat *ttystat __P((char *, int)); 128 static void usage __P((int)); 129 static int this_is_uptime __P((const char *s)); 130 131 char *fmt_argv __P((char **, char *, int)); /* ../../bin/ps/fmt.c */ 132 133 int 134 main(argc, argv) 135 int argc; 136 char **argv; 137 { 138 struct kinfo_proc *kp; 139 struct kinfo_proc *dkp; 140 struct hostent *hp; 141 struct stat *stp; 142 FILE *ut; 143 u_long l; 144 time_t touched; 145 int ch, i, nentries, nusers, wcmd, longidle, dropgid; 146 char *memf, *nlistf, *p, *x_suffix; 147 char buf[MAXHOSTNAMELEN], errbuf[_POSIX2_LINE_MAX]; 148 char fn[MAXHOSTNAMELEN]; 149 char *dot; 150 151 (void)setlocale(LC_ALL, ""); 152 use_ampm = (*nl_langinfo(T_FMT_AMPM) != '\0'); 153 use_comma = (*nl_langinfo(RADIXCHAR) != ','); 154 155 /* Are we w(1) or uptime(1)? */ 156 if (this_is_uptime(argv[0]) == 0) { 157 wcmd = 0; 158 p = ""; 159 } else { 160 wcmd = 1; 161 p = "dhiflM:N:nsuw"; 162 } 163 164 dropgid = 0; 165 memf = nlistf = _PATH_DEVNULL; 166 while ((ch = getopt(argc, argv, p)) != -1) 167 switch (ch) { 168 case 'd': 169 dflag = 1; 170 break; 171 case 'h': 172 header = 0; 173 break; 174 case 'i': 175 sortidle = 1; 176 break; 177 case 'M': 178 header = 0; 179 memf = optarg; 180 dropgid = 1; 181 break; 182 case 'N': 183 nlistf = optarg; 184 dropgid = 1; 185 break; 186 case 'n': 187 nflag = 1; 188 break; 189 case 'f': case 'l': case 's': case 'u': case 'w': 190 warnx("[-flsuw] no longer supported"); 191 /* FALLTHROUGH */ 192 case '?': 193 default: 194 usage(wcmd); 195 } 196 argc -= optind; 197 argv += optind; 198 199 if (!(_res.options & RES_INIT)) 200 res_init(); 201 _res.retrans = 2; /* resolver timeout to 2 seconds per try */ 202 _res.retry = 1; /* only try once.. */ 203 204 /* 205 * Discard setgid privileges if not the running kernel so that bad 206 * guys can't print interesting stuff from kernel memory. 207 */ 208 if (dropgid) 209 setgid(getgid()); 210 211 if ((kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf)) == NULL) 212 errx(1, "%s", errbuf); 213 214 (void)time(&now); 215 if ((ut = fopen(_PATH_UTMP, "r")) == NULL) 216 err(1, "%s", _PATH_UTMP); 217 218 if (*argv) 219 sel_users = argv; 220 221 for (nusers = 0; fread(&utmp, sizeof(utmp), 1, ut);) { 222 if (utmp.ut_name[0] == '\0') 223 continue; 224 if (!(stp = ttystat(utmp.ut_line, UT_LINESIZE))) 225 continue; /* corrupted record */ 226 ++nusers; 227 if (wcmd == 0) 228 continue; 229 if (sel_users) { 230 int usermatch; 231 char **user; 232 233 usermatch = 0; 234 for (user = sel_users; !usermatch && *user; user++) 235 if (!strncmp(utmp.ut_name, *user, UT_NAMESIZE)) 236 usermatch = 1; 237 if (!usermatch) 238 continue; 239 } 240 if ((ep = calloc(1, sizeof(struct entry))) == NULL) 241 errx(1, "calloc"); 242 *nextp = ep; 243 nextp = &ep->next; 244 memmove(&ep->utmp, &utmp, sizeof(struct utmp)); 245 ep->tdev = stp->st_rdev; 246 #ifdef CPU_CONSDEV 247 /* 248 * If this is the console device, attempt to ascertain 249 * the true console device dev_t. 250 */ 251 if (ep->tdev == 0) { 252 int mib[2]; 253 size_t size; 254 255 mib[0] = CTL_MACHDEP; 256 mib[1] = CPU_CONSDEV; 257 size = sizeof(dev_t); 258 (void)sysctl(mib, 2, &ep->tdev, &size, NULL, 0); 259 } 260 #endif 261 touched = stp->st_atime; 262 if (touched < ep->utmp.ut_time) { 263 /* tty untouched since before login */ 264 touched = ep->utmp.ut_time; 265 } 266 if ((ep->idle = now - touched) < 0) 267 ep->idle = 0; 268 } 269 (void)fclose(ut); 270 271 if (header || wcmd == 0) { 272 pr_header(&now, nusers); 273 if (wcmd == 0) { 274 (void)kvm_close(kd); 275 exit(0); 276 } 277 278 #define HEADER_USER "USER" 279 #define HEADER_TTY "TTY" 280 #define HEADER_FROM "FROM" 281 #define HEADER_LOGIN_IDLE "LOGIN@ IDLE " 282 #define HEADER_WHAT "WHAT\n" 283 #define WUSED (UT_NAMESIZE + UT_LINESIZE + W_DISPHOSTSIZE + \ 284 sizeof(HEADER_LOGIN_IDLE) + 3) /* header width incl. spaces */ 285 (void)printf("%-*.*s %-*.*s %-*.*s %s", 286 UT_NAMESIZE, UT_NAMESIZE, HEADER_USER, 287 UT_LINESIZE, UT_LINESIZE, HEADER_TTY, 288 W_DISPHOSTSIZE, W_DISPHOSTSIZE, HEADER_FROM, 289 HEADER_LOGIN_IDLE HEADER_WHAT); 290 } 291 292 if ((kp = kvm_getprocs(kd, KERN_PROC_ALL, 0, &nentries)) == NULL) 293 err(1, "%s", kvm_geterr(kd)); 294 for (i = 0; i < nentries; i++, kp++) { 295 if (kp->ki_stat == SIDL || kp->ki_stat == SZOMB) 296 continue; 297 for (ep = ehead; ep != NULL; ep = ep->next) { 298 if (ep->tdev == kp->ki_tdev) { 299 /* 300 * proc is associated with this terminal 301 */ 302 if (ep->kp == NULL && kp->ki_pgid == kp->ki_tpgid) { 303 /* 304 * Proc is 'most interesting' 305 */ 306 if (proc_compare(ep->kp, kp)) 307 ep->kp = kp; 308 } 309 /* 310 * Proc debug option info; add to debug 311 * list using kinfo_proc ki_spare[0] 312 * as next pointer; ptr to ptr avoids the 313 * ptr = long assumption. 314 */ 315 dkp = ep->dkp; 316 ep->dkp = kp; 317 debugproc(kp) = dkp; 318 } 319 } 320 } 321 if ((ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) == -1 && 322 ioctl(STDERR_FILENO, TIOCGWINSZ, &ws) == -1 && 323 ioctl(STDIN_FILENO, TIOCGWINSZ, &ws) == -1) || ws.ws_col == 0) 324 ttywidth = 79; 325 else 326 ttywidth = ws.ws_col - 1; 327 argwidth = ttywidth - WUSED; 328 if (argwidth < 4) 329 argwidth = 8; 330 for (ep = ehead; ep != NULL; ep = ep->next) { 331 if (ep->kp == NULL) { 332 ep->args = "-"; 333 continue; 334 } 335 ep->args = fmt_argv(kvm_getargv(kd, ep->kp, argwidth), 336 ep->kp->ki_comm, MAXCOMLEN); 337 if (ep->args == NULL) 338 err(1, NULL); 339 } 340 /* sort by idle time */ 341 if (sortidle && ehead != NULL) { 342 struct entry *from, *save; 343 344 from = ehead; 345 ehead = NULL; 346 while (from != NULL) { 347 for (nextp = &ehead; 348 (*nextp) && from->idle >= (*nextp)->idle; 349 nextp = &(*nextp)->next) 350 continue; 351 save = from; 352 from = from->next; 353 save->next = *nextp; 354 *nextp = save; 355 } 356 } 357 358 for (ep = ehead; ep != NULL; ep = ep->next) { 359 char host_buf[UT_HOSTSIZE + 1]; 360 struct sockaddr_storage ss; 361 struct sockaddr *sa = (struct sockaddr *)&ss; 362 struct sockaddr_in *sin = (struct sockaddr_in *)&ss; 363 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)&ss; 364 int isaddr; 365 366 host_buf[UT_HOSTSIZE] = '\0'; 367 strncpy(host_buf, ep->utmp.ut_host, UT_HOSTSIZE); 368 p = *host_buf ? host_buf : "-"; 369 if ((x_suffix = strrchr(p, ':')) != NULL) { 370 if ((dot = strchr(x_suffix, '.')) != NULL && 371 strchr(dot+1, '.') == NULL) 372 *x_suffix++ = '\0'; 373 else 374 x_suffix = NULL; 375 } 376 if (!nflag) { 377 /* Attempt to change an IP address into a name */ 378 isaddr = 0; 379 memset(&ss, '\0', sizeof(ss)); 380 if (inet_pton(AF_INET6, p, &sin6->sin6_addr) == 1) { 381 sin6->sin6_len = sizeof(*sin6); 382 sin6->sin6_family = AF_INET6; 383 isaddr = 1; 384 } else if (inet_pton(AF_INET, p, &sin->sin_addr) == 1) { 385 sin->sin_len = sizeof(*sin); 386 sin->sin_family = AF_INET; 387 isaddr = 1; 388 } 389 if (isaddr && realhostname_sa(fn, sizeof(fn), sa, 390 sa->sa_len) == HOSTNAME_FOUND) 391 p = fn; 392 } 393 if (x_suffix) { 394 (void)snprintf(buf, sizeof(buf), "%s:%s", p, x_suffix); 395 p = buf; 396 } 397 if (dflag) { 398 for (dkp = ep->dkp; dkp != NULL; dkp = debugproc(dkp)) { 399 char *ptr; 400 401 ptr = fmt_argv(kvm_getargv(kd, dkp, argwidth), 402 dkp->ki_comm, MAXCOMLEN); 403 if (ptr == NULL) 404 ptr = "-"; 405 (void)printf("\t\t%-9d %s\n", 406 dkp->ki_pid, ptr); 407 } 408 } 409 (void)printf("%-*.*s %-*.*s %-*.*s ", 410 UT_NAMESIZE, UT_NAMESIZE, ep->utmp.ut_name, 411 UT_LINESIZE, UT_LINESIZE, 412 strncmp(ep->utmp.ut_line, "tty", 3) && 413 strncmp(ep->utmp.ut_line, "cua", 3) ? 414 ep->utmp.ut_line : ep->utmp.ut_line + 3, 415 W_DISPHOSTSIZE, W_DISPHOSTSIZE, *p ? p : "-"); 416 pr_attime(&ep->utmp.ut_time, &now); 417 longidle = pr_idle(ep->idle); 418 (void)printf("%.*s\n", argwidth - longidle, ep->args); 419 } 420 (void)kvm_close(kd); 421 exit(0); 422 } 423 424 static void 425 pr_header(nowp, nusers) 426 time_t *nowp; 427 int nusers; 428 { 429 double avenrun[3]; 430 time_t uptime; 431 int days, hrs, i, mins, secs; 432 int mib[2]; 433 size_t size; 434 char buf[256]; 435 436 /* 437 * Print time of day. 438 */ 439 (void)strftime(buf, sizeof(buf) - 1, 440 use_ampm ? "%l:%M%p" : "%k:%M", localtime(nowp)); 441 buf[sizeof(buf) - 1] = '\0'; 442 (void)printf("%s ", buf); 443 444 /* 445 * Print how long system has been up. 446 * (Found by looking getting "boottime" from the kernel) 447 */ 448 mib[0] = CTL_KERN; 449 mib[1] = KERN_BOOTTIME; 450 size = sizeof(boottime); 451 if (sysctl(mib, 2, &boottime, &size, NULL, 0) != -1 && 452 boottime.tv_sec != 0) { 453 uptime = now - boottime.tv_sec; 454 if (uptime > 60) 455 uptime += 30; 456 days = uptime / 86400; 457 uptime %= 86400; 458 hrs = uptime / 3600; 459 uptime %= 3600; 460 mins = uptime / 60; 461 secs = uptime % 60; 462 (void)printf(" up"); 463 if (days > 0) 464 (void)printf(" %d day%s,", days, days > 1 ? "s" : ""); 465 if (hrs > 0 && mins > 0) 466 (void)printf(" %2d:%02d,", hrs, mins); 467 else if (hrs > 0) 468 (void)printf(" %d hr%s,", hrs, hrs > 1 ? "s" : ""); 469 else if (mins > 0) 470 (void)printf(" %d min%s,", mins, mins > 1 ? "s" : ""); 471 else 472 (void)printf(" %d sec%s,", secs, secs > 1 ? "s" : ""); 473 } 474 475 /* Print number of users logged in to system */ 476 (void)printf(" %d user%s", nusers, nusers == 1 ? "" : "s"); 477 478 /* 479 * Print 1, 5, and 15 minute load averages. 480 */ 481 if (getloadavg(avenrun, sizeof(avenrun) / sizeof(avenrun[0])) == -1) 482 (void)printf(", no load average information available\n"); 483 else { 484 (void)printf(", load averages:"); 485 for (i = 0; i < (sizeof(avenrun) / sizeof(avenrun[0])); i++) { 486 if (use_comma && i > 0) 487 (void)printf(","); 488 (void)printf(" %.2f", avenrun[i]); 489 } 490 (void)printf("\n"); 491 } 492 } 493 494 static struct stat * 495 ttystat(line, sz) 496 char *line; 497 int sz; 498 { 499 static struct stat sb; 500 char ttybuf[MAXPATHLEN]; 501 502 (void)snprintf(ttybuf, sizeof(ttybuf), "%s%.*s", _PATH_DEV, sz, line); 503 if (stat(ttybuf, &sb)) { 504 warn("%s", ttybuf); 505 return (NULL); 506 } 507 return (&sb); 508 } 509 510 static void 511 usage(wcmd) 512 int wcmd; 513 { 514 if (wcmd) 515 (void)fprintf(stderr, 516 "usage: w [-dhin] [-M core] [-N system] [user ...]\n"); 517 else 518 (void)fprintf(stderr, "usage: uptime\n"); 519 exit(1); 520 } 521 522 static int 523 this_is_uptime(s) 524 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