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/lock.h> 56 #include <sys/time.h> 57 #include <sys/stat.h> 58 #include <sys/sysctl.h> 59 #include <sys/proc.h> 60 #include <sys/user.h> 61 #include <sys/ioctl.h> 62 #include <sys/socket.h> 63 #include <sys/tty.h> 64 65 #include <machine/cpu.h> 66 #include <netinet/in.h> 67 #include <arpa/inet.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 <stdio.h> 82 #include <stdlib.h> 83 #include <string.h> 84 #include <unistd.h> 85 #include <utmp.h> 86 #include <vis.h> 87 88 #include <arpa/nameser.h> 89 #include <resolv.h> 90 91 #include "extern.h" 92 93 struct timeval boottime; 94 struct utmp utmp; 95 struct winsize ws; 96 kvm_t *kd; 97 time_t now; /* the current time of day */ 98 time_t uptime; /* time of last reboot & elapsed time since */ 99 int ttywidth; /* width of tty */ 100 int argwidth; /* width of tty */ 101 int header = 1; /* true if -h flag: don't print heading */ 102 int nflag; /* true if -n flag: don't convert addrs */ 103 int dflag; /* true if -d flag: output debug info */ 104 int sortidle; /* sort by idle time */ 105 int use_ampm; /* use AM/PM time */ 106 int use_comma; /* use comma as floats separator */ 107 char **sel_users; /* login array of particular users selected */ 108 109 /* 110 * One of these per active utmp entry. 111 */ 112 struct entry { 113 struct entry *next; 114 struct utmp utmp; 115 dev_t tdev; /* dev_t of terminal */ 116 time_t idle; /* idle time of terminal in seconds */ 117 struct kinfo_proc *kp; /* `most interesting' proc */ 118 char *args; /* arg list of interesting process */ 119 struct kinfo_proc *dkp; /* debug option proc list */ 120 } *ep, *ehead = NULL, **nextp = &ehead; 121 122 #define debugproc(p) *((struct kinfo_proc **)&(p)->ki_spare[0]) 123 124 /* W_DISPHOSTSIZE should not be greater than UT_HOSTSIZE */ 125 #define W_DISPHOSTSIZE 16 126 127 static void pr_header __P((time_t *, int)); 128 static struct stat *ttystat __P((char *, int)); 129 static void usage __P((int)); 130 static int this_is_uptime __P((const char *s)); 131 132 char *fmt_argv __P((char **, char *, int)); /* ../../bin/ps/fmt.c */ 133 134 int 135 main(argc, argv) 136 int argc; 137 char **argv; 138 { 139 struct kinfo_proc *kp; 140 struct kinfo_proc *dkp; 141 struct hostent *hp; 142 struct stat *stp; 143 FILE *ut; 144 u_long l; 145 time_t touched; 146 int ch, i, nentries, nusers, wcmd, longidle, dropgid; 147 char *memf, *nlistf, *p, *x_suffix; 148 char buf[MAXHOSTNAMELEN], errbuf[_POSIX2_LINE_MAX]; 149 char fn[MAXHOSTNAMELEN]; 150 char *dot; 151 152 (void)setlocale(LC_ALL, ""); 153 use_ampm = (*nl_langinfo(T_FMT_AMPM) != '\0'); 154 use_comma = (*nl_langinfo(RADIXCHAR) != ','); 155 156 /* Are we w(1) or uptime(1)? */ 157 if (this_is_uptime(argv[0]) == 0) { 158 wcmd = 0; 159 p = ""; 160 } else { 161 wcmd = 1; 162 p = "dhiflM:N:nsuw"; 163 } 164 165 dropgid = 0; 166 memf = nlistf = _PATH_DEVNULL; 167 while ((ch = getopt(argc, argv, p)) != -1) 168 switch (ch) { 169 case 'd': 170 dflag = 1; 171 break; 172 case 'h': 173 header = 0; 174 break; 175 case 'i': 176 sortidle = 1; 177 break; 178 case 'M': 179 header = 0; 180 memf = optarg; 181 dropgid = 1; 182 break; 183 case 'N': 184 nlistf = optarg; 185 dropgid = 1; 186 break; 187 case 'n': 188 nflag = 1; 189 break; 190 case 'f': case 'l': case 's': case 'u': case 'w': 191 warnx("[-flsuw] no longer supported"); 192 /* FALLTHROUGH */ 193 case '?': 194 default: 195 usage(wcmd); 196 } 197 argc -= optind; 198 argv += optind; 199 200 if (!(_res.options & RES_INIT)) 201 res_init(); 202 _res.retrans = 2; /* resolver timeout to 2 seconds per try */ 203 _res.retry = 1; /* only try once.. */ 204 205 /* 206 * Discard setgid privileges if not the running kernel so that bad 207 * guys can't print interesting stuff from kernel memory. 208 */ 209 if (dropgid) 210 setgid(getgid()); 211 212 if ((kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf)) == NULL) 213 errx(1, "%s", errbuf); 214 215 (void)time(&now); 216 if ((ut = fopen(_PATH_UTMP, "r")) == NULL) 217 err(1, "%s", _PATH_UTMP); 218 219 if (*argv) 220 sel_users = argv; 221 222 for (nusers = 0; fread(&utmp, sizeof(utmp), 1, ut);) { 223 if (utmp.ut_name[0] == '\0') 224 continue; 225 if (!(stp = ttystat(utmp.ut_line, UT_LINESIZE))) 226 continue; /* corrupted record */ 227 ++nusers; 228 if (wcmd == 0) 229 continue; 230 if (sel_users) { 231 int usermatch; 232 char **user; 233 234 usermatch = 0; 235 for (user = sel_users; !usermatch && *user; user++) 236 if (!strncmp(utmp.ut_name, *user, UT_NAMESIZE)) 237 usermatch = 1; 238 if (!usermatch) 239 continue; 240 } 241 if ((ep = calloc(1, sizeof(struct entry))) == NULL) 242 errx(1, "calloc"); 243 *nextp = ep; 244 nextp = &ep->next; 245 memmove(&ep->utmp, &utmp, sizeof(struct utmp)); 246 ep->tdev = stp->st_rdev; 247 #ifdef CPU_CONSDEV 248 /* 249 * If this is the console device, attempt to ascertain 250 * the true console device dev_t. 251 */ 252 if (ep->tdev == 0) { 253 int mib[2]; 254 size_t size; 255 256 mib[0] = CTL_MACHDEP; 257 mib[1] = CPU_CONSDEV; 258 size = sizeof(dev_t); 259 (void)sysctl(mib, 2, &ep->tdev, &size, NULL, 0); 260 } 261 #endif 262 touched = stp->st_atime; 263 if (touched < ep->utmp.ut_time) { 264 /* tty untouched since before login */ 265 touched = ep->utmp.ut_time; 266 } 267 if ((ep->idle = now - touched) < 0) 268 ep->idle = 0; 269 } 270 (void)fclose(ut); 271 272 if (header || wcmd == 0) { 273 pr_header(&now, nusers); 274 if (wcmd == 0) { 275 (void)kvm_close(kd); 276 exit(0); 277 } 278 279 #define HEADER_USER "USER" 280 #define HEADER_TTY "TTY" 281 #define HEADER_FROM "FROM" 282 #define HEADER_LOGIN_IDLE "LOGIN@ IDLE " 283 #define HEADER_WHAT "WHAT\n" 284 #define WUSED (UT_NAMESIZE + UT_LINESIZE + W_DISPHOSTSIZE + \ 285 sizeof(HEADER_LOGIN_IDLE) + 3) /* header width incl. spaces */ 286 (void)printf("%-*.*s %-*.*s %-*.*s %s", 287 UT_NAMESIZE, UT_NAMESIZE, HEADER_USER, 288 UT_LINESIZE, UT_LINESIZE, HEADER_TTY, 289 W_DISPHOSTSIZE, W_DISPHOSTSIZE, HEADER_FROM, 290 HEADER_LOGIN_IDLE HEADER_WHAT); 291 } 292 293 if ((kp = kvm_getprocs(kd, KERN_PROC_ALL, 0, &nentries)) == NULL) 294 err(1, "%s", kvm_geterr(kd)); 295 for (i = 0; i < nentries; i++, kp++) { 296 if (kp->ki_stat == SIDL || kp->ki_stat == SZOMB) 297 continue; 298 for (ep = ehead; ep != NULL; ep = ep->next) { 299 if (ep->tdev == kp->ki_tdev) { 300 /* 301 * proc is associated with this terminal 302 */ 303 if (ep->kp == NULL && kp->ki_pgid == kp->ki_tpgid) { 304 /* 305 * Proc is 'most interesting' 306 */ 307 if (proc_compare(ep->kp, kp)) 308 ep->kp = kp; 309 } 310 /* 311 * Proc debug option info; add to debug 312 * list using kinfo_proc ki_spare[0] 313 * as next pointer; ptr to ptr avoids the 314 * ptr = long assumption. 315 */ 316 dkp = ep->dkp; 317 ep->dkp = kp; 318 debugproc(kp) = dkp; 319 } 320 } 321 } 322 if ((ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) == -1 && 323 ioctl(STDERR_FILENO, TIOCGWINSZ, &ws) == -1 && 324 ioctl(STDIN_FILENO, TIOCGWINSZ, &ws) == -1) || ws.ws_col == 0) 325 ttywidth = 79; 326 else 327 ttywidth = ws.ws_col - 1; 328 argwidth = ttywidth - WUSED; 329 if (argwidth < 4) 330 argwidth = 8; 331 for (ep = ehead; ep != NULL; ep = ep->next) { 332 if (ep->kp == NULL) { 333 ep->args = "-"; 334 continue; 335 } 336 ep->args = fmt_argv(kvm_getargv(kd, ep->kp, argwidth), 337 ep->kp->ki_comm, MAXCOMLEN); 338 if (ep->args == NULL) 339 err(1, NULL); 340 } 341 /* sort by idle time */ 342 if (sortidle && ehead != NULL) { 343 struct entry *from, *save; 344 345 from = ehead; 346 ehead = NULL; 347 while (from != NULL) { 348 for (nextp = &ehead; 349 (*nextp) && from->idle >= (*nextp)->idle; 350 nextp = &(*nextp)->next) 351 continue; 352 save = from; 353 from = from->next; 354 save->next = *nextp; 355 *nextp = save; 356 } 357 } 358 359 for (ep = ehead; ep != NULL; ep = ep->next) { 360 char host_buf[UT_HOSTSIZE + 1]; 361 struct sockaddr_storage ss; 362 struct sockaddr *sa = (struct sockaddr *)&ss; 363 struct sockaddr_in *sin = (struct sockaddr_in *)&ss; 364 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)&ss; 365 int isaddr; 366 367 host_buf[UT_HOSTSIZE] = '\0'; 368 strncpy(host_buf, ep->utmp.ut_host, UT_HOSTSIZE); 369 p = *host_buf ? host_buf : "-"; 370 if ((x_suffix = strrchr(p, ':')) != NULL) { 371 if ((dot = strchr(x_suffix, '.')) != NULL && 372 strchr(dot+1, '.') == NULL) 373 *x_suffix++ = '\0'; 374 else 375 x_suffix = NULL; 376 } 377 if (!nflag) { 378 /* Attempt to change an IP address into a name */ 379 isaddr = 0; 380 memset(&ss, '\0', sizeof(ss)); 381 if (inet_pton(AF_INET6, p, &sin6->sin6_addr) == 1) { 382 sin6->sin6_len = sizeof(*sin6); 383 sin6->sin6_family = AF_INET6; 384 isaddr = 1; 385 } else if (inet_pton(AF_INET, p, &sin->sin_addr) == 1) { 386 sin->sin_len = sizeof(*sin); 387 sin->sin_family = AF_INET; 388 isaddr = 1; 389 } 390 if (isaddr && realhostname_sa(fn, sizeof(fn), sa, 391 sa->sa_len) == HOSTNAME_FOUND) 392 p = fn; 393 } 394 if (x_suffix) { 395 (void)snprintf(buf, sizeof(buf), "%s:%s", p, x_suffix); 396 p = buf; 397 } 398 if (dflag) { 399 for (dkp = ep->dkp; dkp != NULL; dkp = debugproc(dkp)) { 400 char *ptr; 401 402 ptr = fmt_argv(kvm_getargv(kd, dkp, argwidth), 403 dkp->ki_comm, MAXCOMLEN); 404 if (ptr == NULL) 405 ptr = "-"; 406 (void)printf("\t\t%-9d %s\n", 407 dkp->ki_pid, ptr); 408 } 409 } 410 (void)printf("%-*.*s %-*.*s %-*.*s ", 411 UT_NAMESIZE, UT_NAMESIZE, ep->utmp.ut_name, 412 UT_LINESIZE, UT_LINESIZE, 413 strncmp(ep->utmp.ut_line, "tty", 3) && 414 strncmp(ep->utmp.ut_line, "cua", 3) ? 415 ep->utmp.ut_line : ep->utmp.ut_line + 3, 416 W_DISPHOSTSIZE, W_DISPHOSTSIZE, *p ? p : "-"); 417 pr_attime(&ep->utmp.ut_time, &now); 418 longidle = pr_idle(ep->idle); 419 (void)printf("%.*s\n", argwidth - longidle, ep->args); 420 } 421 (void)kvm_close(kd); 422 exit(0); 423 } 424 425 static void 426 pr_header(nowp, nusers) 427 time_t *nowp; 428 int nusers; 429 { 430 double avenrun[3]; 431 time_t uptime; 432 int days, hrs, i, mins, secs; 433 int mib[2]; 434 size_t size; 435 char buf[256]; 436 437 /* 438 * Print time of day. 439 */ 440 (void)strftime(buf, sizeof(buf) - 1, 441 use_ampm ? "%l:%M%p" : "%k:%M", localtime(nowp)); 442 buf[sizeof(buf) - 1] = '\0'; 443 (void)printf("%s ", buf); 444 445 /* 446 * Print how long system has been up. 447 * (Found by looking getting "boottime" from the kernel) 448 */ 449 mib[0] = CTL_KERN; 450 mib[1] = KERN_BOOTTIME; 451 size = sizeof(boottime); 452 if (sysctl(mib, 2, &boottime, &size, NULL, 0) != -1 && 453 boottime.tv_sec != 0) { 454 uptime = now - boottime.tv_sec; 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