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(int argc, char *argv[]) 133 { 134 struct kinfo_proc *kp; 135 struct kinfo_proc *dkp; 136 struct stat *stp; 137 FILE *ut; 138 time_t touched; 139 int ch, i, nentries, nusers, wcmd, longidle, dropgid; 140 const char *memf, *nlistf, *p; 141 char *x_suffix; 142 char buf[MAXHOSTNAMELEN], errbuf[_POSIX2_LINE_MAX]; 143 char fn[MAXHOSTNAMELEN]; 144 char *dot; 145 146 (void)setlocale(LC_ALL, ""); 147 use_ampm = (*nl_langinfo(T_FMT_AMPM) != '\0'); 148 use_comma = (*nl_langinfo(RADIXCHAR) != ','); 149 150 /* Are we w(1) or uptime(1)? */ 151 if (this_is_uptime(argv[0]) == 0) { 152 wcmd = 0; 153 p = ""; 154 } else { 155 wcmd = 1; 156 p = "dhiflM:N:nsuw"; 157 } 158 159 dropgid = 0; 160 memf = nlistf = _PATH_DEVNULL; 161 while ((ch = getopt(argc, argv, p)) != -1) 162 switch (ch) { 163 case 'd': 164 dflag = 1; 165 break; 166 case 'h': 167 header = 0; 168 break; 169 case 'i': 170 sortidle = 1; 171 break; 172 case 'M': 173 header = 0; 174 memf = optarg; 175 dropgid = 1; 176 break; 177 case 'N': 178 nlistf = optarg; 179 dropgid = 1; 180 break; 181 case 'n': 182 nflag = 1; 183 break; 184 case 'f': case 'l': case 's': case 'u': case 'w': 185 warnx("[-flsuw] no longer supported"); 186 /* FALLTHROUGH */ 187 case '?': 188 default: 189 usage(wcmd); 190 } 191 argc -= optind; 192 argv += optind; 193 194 if (!(_res.options & RES_INIT)) 195 res_init(); 196 _res.retrans = 2; /* resolver timeout to 2 seconds per try */ 197 _res.retry = 1; /* only try once.. */ 198 199 /* 200 * Discard setgid privileges if not the running kernel so that bad 201 * guys can't print interesting stuff from kernel memory. 202 */ 203 if (dropgid) 204 setgid(getgid()); 205 206 if ((kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf)) == NULL) 207 errx(1, "%s", errbuf); 208 209 (void)time(&now); 210 if ((ut = fopen(_PATH_UTMP, "r")) == NULL) 211 err(1, "%s", _PATH_UTMP); 212 213 if (*argv) 214 sel_users = argv; 215 216 for (nusers = 0; fread(&utmp, sizeof(utmp), 1, ut);) { 217 if (utmp.ut_name[0] == '\0') 218 continue; 219 if (!(stp = ttystat(utmp.ut_line, UT_LINESIZE))) 220 continue; /* corrupted record */ 221 ++nusers; 222 if (wcmd == 0) 223 continue; 224 if (sel_users) { 225 int usermatch; 226 char **user; 227 228 usermatch = 0; 229 for (user = sel_users; !usermatch && *user; user++) 230 if (!strncmp(utmp.ut_name, *user, UT_NAMESIZE)) 231 usermatch = 1; 232 if (!usermatch) 233 continue; 234 } 235 if ((ep = calloc(1, sizeof(struct entry))) == NULL) 236 errx(1, "calloc"); 237 *nextp = ep; 238 nextp = &ep->next; 239 memmove(&ep->utmp, &utmp, sizeof(struct utmp)); 240 ep->tdev = stp->st_rdev; 241 #ifdef CPU_CONSDEV 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 int mib[2]; 248 size_t size; 249 250 mib[0] = CTL_MACHDEP; 251 mib[1] = CPU_CONSDEV; 252 size = sizeof(dev_t); 253 (void)sysctl(mib, 2, &ep->tdev, &size, NULL, 0); 254 } 255 #endif 256 touched = stp->st_atime; 257 if (touched < ep->utmp.ut_time) { 258 /* tty untouched since before login */ 259 touched = ep->utmp.ut_time; 260 } 261 if ((ep->idle = now - touched) < 0) 262 ep->idle = 0; 263 } 264 (void)fclose(ut); 265 266 if (header || wcmd == 0) { 267 pr_header(&now, nusers); 268 if (wcmd == 0) { 269 (void)kvm_close(kd); 270 exit(0); 271 } 272 273 #define HEADER_USER "USER" 274 #define HEADER_TTY "TTY" 275 #define HEADER_FROM "FROM" 276 #define HEADER_LOGIN_IDLE "LOGIN@ IDLE " 277 #define HEADER_WHAT "WHAT\n" 278 #define WUSED (UT_NAMESIZE + UT_LINESIZE + W_DISPHOSTSIZE + \ 279 sizeof(HEADER_LOGIN_IDLE) + 3) /* header width incl. spaces */ 280 (void)printf("%-*.*s %-*.*s %-*.*s %s", 281 UT_NAMESIZE, UT_NAMESIZE, HEADER_USER, 282 UT_LINESIZE, UT_LINESIZE, HEADER_TTY, 283 W_DISPHOSTSIZE, W_DISPHOSTSIZE, HEADER_FROM, 284 HEADER_LOGIN_IDLE HEADER_WHAT); 285 } 286 287 if ((kp = kvm_getprocs(kd, KERN_PROC_ALL, 0, &nentries)) == NULL) 288 err(1, "%s", kvm_geterr(kd)); 289 for (i = 0; i < nentries; i++, kp++) { 290 if (kp->ki_stat == SIDL || kp->ki_stat == SZOMB) 291 continue; 292 for (ep = ehead; ep != NULL; ep = ep->next) { 293 if (ep->tdev == kp->ki_tdev) { 294 /* 295 * proc is associated with this terminal 296 */ 297 if (ep->kp == NULL && kp->ki_pgid == kp->ki_tpgid) { 298 /* 299 * Proc is 'most interesting' 300 */ 301 if (proc_compare(ep->kp, kp)) 302 ep->kp = kp; 303 } 304 /* 305 * Proc debug option info; add to debug 306 * list using kinfo_proc ki_spare[0] 307 * as next pointer; ptr to ptr avoids the 308 * ptr = long assumption. 309 */ 310 dkp = ep->dkp; 311 ep->dkp = kp; 312 debugproc(kp) = dkp; 313 } 314 } 315 } 316 if ((ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) == -1 && 317 ioctl(STDERR_FILENO, TIOCGWINSZ, &ws) == -1 && 318 ioctl(STDIN_FILENO, TIOCGWINSZ, &ws) == -1) || ws.ws_col == 0) 319 ttywidth = 79; 320 else 321 ttywidth = ws.ws_col - 1; 322 argwidth = ttywidth - WUSED; 323 if (argwidth < 4) 324 argwidth = 8; 325 for (ep = ehead; ep != NULL; ep = ep->next) { 326 if (ep->kp == NULL) { 327 ep->args = strdup("-"); 328 continue; 329 } 330 ep->args = fmt_argv(kvm_getargv(kd, ep->kp, argwidth), 331 ep->kp->ki_comm, MAXCOMLEN); 332 if (ep->args == NULL) 333 err(1, NULL); 334 } 335 /* sort by idle time */ 336 if (sortidle && ehead != NULL) { 337 struct entry *from, *save; 338 339 from = ehead; 340 ehead = NULL; 341 while (from != NULL) { 342 for (nextp = &ehead; 343 (*nextp) && from->idle >= (*nextp)->idle; 344 nextp = &(*nextp)->next) 345 continue; 346 save = from; 347 from = from->next; 348 save->next = *nextp; 349 *nextp = save; 350 } 351 } 352 353 for (ep = ehead; ep != NULL; ep = ep->next) { 354 char host_buf[UT_HOSTSIZE + 1]; 355 struct sockaddr_storage ss; 356 struct sockaddr *sa = (struct sockaddr *)&ss; 357 struct sockaddr_in *lsin = (struct sockaddr_in *)&ss; 358 struct sockaddr_in6 *lsin6 = (struct sockaddr_in6 *)&ss; 359 int isaddr; 360 361 host_buf[UT_HOSTSIZE] = '\0'; 362 strncpy(host_buf, ep->utmp.ut_host, UT_HOSTSIZE); 363 p = *host_buf ? host_buf : "-"; 364 if ((x_suffix = strrchr(p, ':')) != NULL) { 365 if ((dot = strchr(x_suffix, '.')) != NULL && 366 strchr(dot+1, '.') == NULL) 367 *x_suffix++ = '\0'; 368 else 369 x_suffix = NULL; 370 } 371 if (!nflag) { 372 /* Attempt to change an IP address into a name */ 373 isaddr = 0; 374 memset(&ss, '\0', sizeof(ss)); 375 if (inet_pton(AF_INET6, p, &lsin6->sin6_addr) == 1) { 376 lsin6->sin6_len = sizeof(*lsin6); 377 lsin6->sin6_family = AF_INET6; 378 isaddr = 1; 379 } else if (inet_pton(AF_INET, p, &lsin->sin_addr) == 1) { 380 lsin->sin_len = sizeof(*lsin); 381 lsin->sin_family = AF_INET; 382 isaddr = 1; 383 } 384 if (isaddr && realhostname_sa(fn, sizeof(fn), sa, 385 sa->sa_len) == HOSTNAME_FOUND) 386 p = fn; 387 } 388 if (x_suffix) { 389 (void)snprintf(buf, sizeof(buf), "%s:%s", p, x_suffix); 390 p = buf; 391 } 392 if (dflag) { 393 for (dkp = ep->dkp; dkp != NULL; dkp = debugproc(dkp)) { 394 const char *ptr; 395 396 ptr = fmt_argv(kvm_getargv(kd, dkp, argwidth), 397 dkp->ki_comm, MAXCOMLEN); 398 if (ptr == NULL) 399 ptr = "-"; 400 (void)printf("\t\t%-9d %s\n", 401 dkp->ki_pid, ptr); 402 } 403 } 404 (void)printf("%-*.*s %-*.*s %-*.*s ", 405 UT_NAMESIZE, UT_NAMESIZE, ep->utmp.ut_name, 406 UT_LINESIZE, UT_LINESIZE, 407 strncmp(ep->utmp.ut_line, "tty", 3) && 408 strncmp(ep->utmp.ut_line, "cua", 3) ? 409 ep->utmp.ut_line : ep->utmp.ut_line + 3, 410 W_DISPHOSTSIZE, W_DISPHOSTSIZE, *p ? p : "-"); 411 pr_attime(&ep->utmp.ut_time, &now); 412 longidle = pr_idle(ep->idle); 413 (void)printf("%.*s\n", argwidth - longidle, ep->args); 414 } 415 (void)kvm_close(kd); 416 exit(0); 417 } 418 419 static void 420 pr_header(time_t *nowp, int nusers) 421 { 422 double avenrun[3]; 423 time_t uptime; 424 int days, hrs, i, mins, secs; 425 int mib[2]; 426 size_t size; 427 char buf[256]; 428 429 /* 430 * Print time of day. 431 */ 432 (void)strftime(buf, sizeof(buf) - 1, 433 use_ampm ? "%l:%M%p" : "%k:%M", localtime(nowp)); 434 buf[sizeof(buf) - 1] = '\0'; 435 (void)printf("%s ", buf); 436 437 /* 438 * Print how long system has been up. 439 * (Found by looking getting "boottime" from the kernel) 440 */ 441 mib[0] = CTL_KERN; 442 mib[1] = KERN_BOOTTIME; 443 size = sizeof(boottime); 444 if (sysctl(mib, 2, &boottime, &size, NULL, 0) != -1 && 445 boottime.tv_sec != 0) { 446 uptime = now - boottime.tv_sec; 447 if (uptime > 60) 448 uptime += 30; 449 days = uptime / 86400; 450 uptime %= 86400; 451 hrs = uptime / 3600; 452 uptime %= 3600; 453 mins = uptime / 60; 454 secs = uptime % 60; 455 (void)printf(" up"); 456 if (days > 0) 457 (void)printf(" %d day%s,", days, days > 1 ? "s" : ""); 458 if (hrs > 0 && mins > 0) 459 (void)printf(" %2d:%02d,", hrs, mins); 460 else if (hrs > 0) 461 (void)printf(" %d hr%s,", hrs, hrs > 1 ? "s" : ""); 462 else if (mins > 0) 463 (void)printf(" %d min%s,", mins, mins > 1 ? "s" : ""); 464 else 465 (void)printf(" %d sec%s,", secs, secs > 1 ? "s" : ""); 466 } 467 468 /* Print number of users logged in to system */ 469 (void)printf(" %d user%s", nusers, nusers == 1 ? "" : "s"); 470 471 /* 472 * Print 1, 5, and 15 minute load averages. 473 */ 474 if (getloadavg(avenrun, sizeof(avenrun) / sizeof(avenrun[0])) == -1) 475 (void)printf(", no load average information available\n"); 476 else { 477 (void)printf(", load averages:"); 478 for (i = 0; i < (int)(sizeof(avenrun) / sizeof(avenrun[0])); i++) { 479 if (use_comma && i > 0) 480 (void)printf(","); 481 (void)printf(" %.2f", avenrun[i]); 482 } 483 (void)printf("\n"); 484 } 485 } 486 487 static struct stat * 488 ttystat(char *line, int sz) 489 { 490 static struct stat sb; 491 char ttybuf[MAXPATHLEN]; 492 493 (void)snprintf(ttybuf, sizeof(ttybuf), "%s%.*s", _PATH_DEV, sz, line); 494 if (stat(ttybuf, &sb) == 0) { 495 return (&sb); 496 } else 497 return (NULL); 498 } 499 500 static void 501 usage(int wcmd) 502 { 503 if (wcmd) 504 (void)fprintf(stderr, 505 "usage: w [-dhin] [-M core] [-N system] [user ...]\n"); 506 else 507 (void)fprintf(stderr, "usage: uptime\n"); 508 exit(1); 509 } 510 511 static int 512 this_is_uptime(const char *s) 513 { 514 const char *u; 515 516 if ((u = strrchr(s, '/')) != NULL) 517 ++u; 518 else 519 u = s; 520 if (strcmp(u, "uptime") == 0) 521 return (0); 522 return (-1); 523 } 524