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 int ttywidth; /* width of tty */ 97 int argwidth; /* width of tty */ 98 int header = 1; /* true if -h flag: don't print heading */ 99 int nflag; /* true if -n flag: don't convert addrs */ 100 int dflag; /* true if -d flag: output debug info */ 101 int sortidle; /* sort by idle time */ 102 int use_ampm; /* use AM/PM time */ 103 int use_comma; /* use comma as floats separator */ 104 char **sel_users; /* login array of particular users selected */ 105 106 /* 107 * One of these per active utmp entry. 108 */ 109 struct entry { 110 struct entry *next; 111 struct utmp utmp; 112 dev_t tdev; /* dev_t of terminal */ 113 time_t idle; /* idle time of terminal in seconds */ 114 struct kinfo_proc *kp; /* `most interesting' proc */ 115 char *args; /* arg list of interesting process */ 116 struct kinfo_proc *dkp; /* debug option proc list */ 117 } *ep, *ehead = NULL, **nextp = &ehead; 118 119 #define debugproc(p) *((struct kinfo_proc **)&(p)->ki_spare[0]) 120 121 /* W_DISPHOSTSIZE should not be greater than UT_HOSTSIZE */ 122 #define W_DISPHOSTSIZE 16 123 124 static void pr_header(time_t *, int); 125 static struct stat *ttystat(char *, int); 126 static void usage(int); 127 static int this_is_uptime(const char *s); 128 129 char *fmt_argv(char **, char *, int); /* ../../bin/ps/fmt.c */ 130 131 int 132 main(argc, argv) 133 int argc; 134 char **argv; 135 { 136 struct kinfo_proc *kp; 137 struct kinfo_proc *dkp; 138 struct stat *stp; 139 FILE *ut; 140 time_t touched; 141 int ch, i, nentries, nusers, wcmd, longidle, dropgid; 142 const char *memf, *nlistf, *p; 143 char *x_suffix; 144 char buf[MAXHOSTNAMELEN], errbuf[_POSIX2_LINE_MAX]; 145 char fn[MAXHOSTNAMELEN]; 146 char *dot; 147 148 (void)setlocale(LC_ALL, ""); 149 use_ampm = (*nl_langinfo(T_FMT_AMPM) != '\0'); 150 use_comma = (*nl_langinfo(RADIXCHAR) != ','); 151 152 /* Are we w(1) or uptime(1)? */ 153 if (this_is_uptime(argv[0]) == 0) { 154 wcmd = 0; 155 p = ""; 156 } else { 157 wcmd = 1; 158 p = "dhiflM:N:nsuw"; 159 } 160 161 dropgid = 0; 162 memf = nlistf = _PATH_DEVNULL; 163 while ((ch = getopt(argc, argv, p)) != -1) 164 switch (ch) { 165 case 'd': 166 dflag = 1; 167 break; 168 case 'h': 169 header = 0; 170 break; 171 case 'i': 172 sortidle = 1; 173 break; 174 case 'M': 175 header = 0; 176 memf = optarg; 177 dropgid = 1; 178 break; 179 case 'N': 180 nlistf = optarg; 181 dropgid = 1; 182 break; 183 case 'n': 184 nflag = 1; 185 break; 186 case 'f': case 'l': case 's': case 'u': case 'w': 187 warnx("[-flsuw] no longer supported"); 188 /* FALLTHROUGH */ 189 case '?': 190 default: 191 usage(wcmd); 192 } 193 argc -= optind; 194 argv += optind; 195 196 if (!(_res.options & RES_INIT)) 197 res_init(); 198 _res.retrans = 2; /* resolver timeout to 2 seconds per try */ 199 _res.retry = 1; /* only try once.. */ 200 201 /* 202 * Discard setgid privileges if not the running kernel so that bad 203 * guys can't print interesting stuff from kernel memory. 204 */ 205 if (dropgid) 206 setgid(getgid()); 207 208 if ((kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf)) == NULL) 209 errx(1, "%s", errbuf); 210 211 (void)time(&now); 212 if ((ut = fopen(_PATH_UTMP, "r")) == NULL) 213 err(1, "%s", _PATH_UTMP); 214 215 if (*argv) 216 sel_users = argv; 217 218 for (nusers = 0; fread(&utmp, sizeof(utmp), 1, ut);) { 219 if (utmp.ut_name[0] == '\0') 220 continue; 221 if (!(stp = ttystat(utmp.ut_line, UT_LINESIZE))) 222 continue; /* corrupted record */ 223 ++nusers; 224 if (wcmd == 0) 225 continue; 226 if (sel_users) { 227 int usermatch; 228 char **user; 229 230 usermatch = 0; 231 for (user = sel_users; !usermatch && *user; user++) 232 if (!strncmp(utmp.ut_name, *user, UT_NAMESIZE)) 233 usermatch = 1; 234 if (!usermatch) 235 continue; 236 } 237 if ((ep = calloc(1, sizeof(struct entry))) == NULL) 238 errx(1, "calloc"); 239 *nextp = ep; 240 nextp = &ep->next; 241 memmove(&ep->utmp, &utmp, sizeof(struct utmp)); 242 ep->tdev = stp->st_rdev; 243 #ifdef CPU_CONSDEV 244 /* 245 * If this is the console device, attempt to ascertain 246 * the true console device dev_t. 247 */ 248 if (ep->tdev == 0) { 249 int mib[2]; 250 size_t size; 251 252 mib[0] = CTL_MACHDEP; 253 mib[1] = CPU_CONSDEV; 254 size = sizeof(dev_t); 255 (void)sysctl(mib, 2, &ep->tdev, &size, NULL, 0); 256 } 257 #endif 258 touched = stp->st_atime; 259 if (touched < ep->utmp.ut_time) { 260 /* tty untouched since before login */ 261 touched = ep->utmp.ut_time; 262 } 263 if ((ep->idle = now - touched) < 0) 264 ep->idle = 0; 265 } 266 (void)fclose(ut); 267 268 if (header || wcmd == 0) { 269 pr_header(&now, nusers); 270 if (wcmd == 0) { 271 (void)kvm_close(kd); 272 exit(0); 273 } 274 275 #define HEADER_USER "USER" 276 #define HEADER_TTY "TTY" 277 #define HEADER_FROM "FROM" 278 #define HEADER_LOGIN_IDLE "LOGIN@ IDLE " 279 #define HEADER_WHAT "WHAT\n" 280 #define WUSED (UT_NAMESIZE + UT_LINESIZE + W_DISPHOSTSIZE + \ 281 sizeof(HEADER_LOGIN_IDLE) + 3) /* header width incl. spaces */ 282 (void)printf("%-*.*s %-*.*s %-*.*s %s", 283 UT_NAMESIZE, UT_NAMESIZE, HEADER_USER, 284 UT_LINESIZE, UT_LINESIZE, HEADER_TTY, 285 W_DISPHOSTSIZE, W_DISPHOSTSIZE, HEADER_FROM, 286 HEADER_LOGIN_IDLE HEADER_WHAT); 287 } 288 289 if ((kp = kvm_getprocs(kd, KERN_PROC_ALL, 0, &nentries)) == NULL) 290 err(1, "%s", kvm_geterr(kd)); 291 for (i = 0; i < nentries; i++, kp++) { 292 if (kp->ki_stat == SIDL || kp->ki_stat == SZOMB) 293 continue; 294 for (ep = ehead; ep != NULL; ep = ep->next) { 295 if (ep->tdev == kp->ki_tdev) { 296 /* 297 * proc is associated with this terminal 298 */ 299 if (ep->kp == NULL && kp->ki_pgid == kp->ki_tpgid) { 300 /* 301 * Proc is 'most interesting' 302 */ 303 if (proc_compare(ep->kp, kp)) 304 ep->kp = kp; 305 } 306 /* 307 * Proc debug option info; add to debug 308 * list using kinfo_proc ki_spare[0] 309 * as next pointer; ptr to ptr avoids the 310 * ptr = long assumption. 311 */ 312 dkp = ep->dkp; 313 ep->dkp = kp; 314 debugproc(kp) = dkp; 315 } 316 } 317 } 318 if ((ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) == -1 && 319 ioctl(STDERR_FILENO, TIOCGWINSZ, &ws) == -1 && 320 ioctl(STDIN_FILENO, TIOCGWINSZ, &ws) == -1) || ws.ws_col == 0) 321 ttywidth = 79; 322 else 323 ttywidth = ws.ws_col - 1; 324 argwidth = ttywidth - WUSED; 325 if (argwidth < 4) 326 argwidth = 8; 327 for (ep = ehead; ep != NULL; ep = ep->next) { 328 if (ep->kp == NULL) { 329 ep->args = strdup("-"); 330 continue; 331 } 332 ep->args = fmt_argv(kvm_getargv(kd, ep->kp, argwidth), 333 ep->kp->ki_comm, MAXCOMLEN); 334 if (ep->args == NULL) 335 err(1, NULL); 336 } 337 /* sort by idle time */ 338 if (sortidle && ehead != NULL) { 339 struct entry *from, *save; 340 341 from = ehead; 342 ehead = NULL; 343 while (from != NULL) { 344 for (nextp = &ehead; 345 (*nextp) && from->idle >= (*nextp)->idle; 346 nextp = &(*nextp)->next) 347 continue; 348 save = from; 349 from = from->next; 350 save->next = *nextp; 351 *nextp = save; 352 } 353 } 354 355 for (ep = ehead; ep != NULL; ep = ep->next) { 356 char host_buf[UT_HOSTSIZE + 1]; 357 struct sockaddr_storage ss; 358 struct sockaddr *sa = (struct sockaddr *)&ss; 359 struct sockaddr_in *lsin = (struct sockaddr_in *)&ss; 360 struct sockaddr_in6 *lsin6 = (struct sockaddr_in6 *)&ss; 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 pr_attime(&ep->utmp.ut_time, &now); 414 longidle = pr_idle(ep->idle); 415 (void)printf("%.*s\n", argwidth - longidle, ep->args); 416 } 417 (void)kvm_close(kd); 418 exit(0); 419 } 420 421 static void 422 pr_header(nowp, nusers) 423 time_t *nowp; 424 int nusers; 425 { 426 double avenrun[3]; 427 time_t uptime; 428 int days, hrs, i, mins, secs; 429 int mib[2]; 430 size_t size; 431 char buf[256]; 432 433 /* 434 * Print time of day. 435 */ 436 (void)strftime(buf, sizeof(buf) - 1, 437 use_ampm ? "%l:%M%p" : "%k:%M", localtime(nowp)); 438 buf[sizeof(buf) - 1] = '\0'; 439 (void)printf("%s ", buf); 440 441 /* 442 * Print how long system has been up. 443 * (Found by looking getting "boottime" from the kernel) 444 */ 445 mib[0] = CTL_KERN; 446 mib[1] = KERN_BOOTTIME; 447 size = sizeof(boottime); 448 if (sysctl(mib, 2, &boottime, &size, NULL, 0) != -1 && 449 boottime.tv_sec != 0) { 450 uptime = now - boottime.tv_sec; 451 if (uptime > 60) 452 uptime += 30; 453 days = uptime / 86400; 454 uptime %= 86400; 455 hrs = uptime / 3600; 456 uptime %= 3600; 457 mins = uptime / 60; 458 secs = uptime % 60; 459 (void)printf(" up"); 460 if (days > 0) 461 (void)printf(" %d day%s,", days, days > 1 ? "s" : ""); 462 if (hrs > 0 && mins > 0) 463 (void)printf(" %2d:%02d,", hrs, mins); 464 else if (hrs > 0) 465 (void)printf(" %d hr%s,", hrs, hrs > 1 ? "s" : ""); 466 else if (mins > 0) 467 (void)printf(" %d min%s,", mins, mins > 1 ? "s" : ""); 468 else 469 (void)printf(" %d sec%s,", secs, secs > 1 ? "s" : ""); 470 } 471 472 /* Print number of users logged in to system */ 473 (void)printf(" %d user%s", nusers, nusers == 1 ? "" : "s"); 474 475 /* 476 * Print 1, 5, and 15 minute load averages. 477 */ 478 if (getloadavg(avenrun, sizeof(avenrun) / sizeof(avenrun[0])) == -1) 479 (void)printf(", no load average information available\n"); 480 else { 481 (void)printf(", load averages:"); 482 for (i = 0; i < (int)(sizeof(avenrun) / sizeof(avenrun[0])); i++) { 483 if (use_comma && i > 0) 484 (void)printf(","); 485 (void)printf(" %.2f", avenrun[i]); 486 } 487 (void)printf("\n"); 488 } 489 } 490 491 static struct stat * 492 ttystat(line, sz) 493 char *line; 494 int sz; 495 { 496 static struct stat sb; 497 char ttybuf[MAXPATHLEN]; 498 499 (void)snprintf(ttybuf, sizeof(ttybuf), "%s%.*s", _PATH_DEV, sz, line); 500 if (stat(ttybuf, &sb)) { 501 warn("%s", ttybuf); 502 return (NULL); 503 } 504 return (&sb); 505 } 506 507 static void 508 usage(wcmd) 509 int wcmd; 510 { 511 if (wcmd) 512 (void)fprintf(stderr, 513 "usage: w [-dhin] [-M core] [-N system] [user ...]\n"); 514 else 515 (void)fprintf(stderr, "usage: uptime\n"); 516 exit(1); 517 } 518 519 static int 520 this_is_uptime(s) 521 const char *s; 522 { 523 const char *u; 524 525 if ((u = strrchr(s, '/')) != NULL) 526 ++u; 527 else 528 u = s; 529 if (strcmp(u, "uptime") == 0) 530 return (0); 531 return (-1); 532 } 533