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 <netdb.h> 74 #include <nlist.h> 75 #include <paths.h> 76 #include <stdio.h> 77 #include <stdlib.h> 78 #include <string.h> 79 #include <unistd.h> 80 #include <utmp.h> 81 #include <vis.h> 82 #include <locale.h> 83 84 #include <arpa/nameser.h> 85 #include <resolv.h> 86 87 #include "extern.h" 88 89 struct timeval boottime; 90 struct utmp utmp; 91 struct winsize ws; 92 kvm_t *kd; 93 time_t now; /* the current time of day */ 94 time_t uptime; /* time of last reboot & elapsed time since */ 95 int ttywidth; /* width of tty */ 96 int argwidth; /* width of tty */ 97 int header = 1; /* true if -h flag: don't print heading */ 98 int nflag; /* true if -n flag: don't convert addrs */ 99 int dflag; /* true if -d flag: output debug info */ 100 int sortidle; /* sort by idle time */ 101 char **sel_users; /* login array of particular users selected */ 102 char domain[MAXHOSTNAMELEN]; 103 104 /* 105 * One of these per active utmp entry. 106 */ 107 struct entry { 108 struct entry *next; 109 struct utmp utmp; 110 dev_t tdev; /* dev_t of terminal */ 111 time_t idle; /* idle time of terminal in seconds */ 112 struct kinfo_proc *kp; /* `most interesting' proc */ 113 char *args; /* arg list of interesting process */ 114 struct kinfo_proc *dkp; /* debug option proc list */ 115 } *ep, *ehead = NULL, **nextp = &ehead; 116 117 #define debugproc(p) *((struct kinfo_proc **)&(p)->ki_spare[0]) 118 119 static void pr_header __P((time_t *, int)); 120 static struct stat *ttystat __P((char *, int)); 121 static void usage __P((int)); 122 static int this_is_uptime __P((const char *s)); 123 124 char *fmt_argv __P((char **, char *, int)); /* ../../bin/ps/fmt.c */ 125 126 int 127 main(argc, argv) 128 int argc; 129 char **argv; 130 { 131 struct kinfo_proc *kp; 132 struct kinfo_proc *dkp; 133 struct hostent *hp; 134 struct stat *stp; 135 FILE *ut; 136 u_long l; 137 time_t touched; 138 int ch, i, nentries, nusers, wcmd, longidle, dropgid; 139 char *memf, *nlistf, *p, *x; 140 char buf[MAXHOSTNAMELEN], errbuf[256]; 141 142 (void)setlocale(LC_ALL, ""); 143 144 /* Are we w(1) or uptime(1)? */ 145 if (this_is_uptime(argv[0]) == 0) { 146 wcmd = 0; 147 p = ""; 148 } else { 149 wcmd = 1; 150 p = "dhiflM:N:nsuw"; 151 } 152 153 dropgid = 0; 154 memf = nlistf = _PATH_DEVNULL; 155 while ((ch = getopt(argc, argv, p)) != -1) 156 switch (ch) { 157 case 'd': 158 dflag = 1; 159 break; 160 case 'h': 161 header = 0; 162 break; 163 case 'i': 164 sortidle = 1; 165 break; 166 case 'M': 167 header = 0; 168 memf = optarg; 169 dropgid = 1; 170 break; 171 case 'N': 172 nlistf = optarg; 173 dropgid = 1; 174 break; 175 case 'n': 176 nflag = 1; 177 break; 178 case 'f': case 'l': case 's': case 'u': case 'w': 179 warnx("[-flsuw] no longer supported"); 180 /* FALLTHROUGH */ 181 case '?': 182 default: 183 usage(wcmd); 184 } 185 argc -= optind; 186 argv += optind; 187 188 if (!(_res.options & RES_INIT)) 189 res_init(); 190 _res.retrans = 2; /* resolver timeout to 2 seconds per try */ 191 _res.retry = 1; /* only try once.. */ 192 193 /* 194 * Discard setgid privileges if not the running kernel so that bad 195 * guys can't print interesting stuff from kernel memory. 196 */ 197 if (dropgid) 198 setgid(getgid()); 199 200 if ((kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf)) == NULL) 201 errx(1, "%s", errbuf); 202 203 (void)time(&now); 204 if ((ut = fopen(_PATH_UTMP, "r")) == NULL) 205 err(1, "%s", _PATH_UTMP); 206 207 if (*argv) 208 sel_users = argv; 209 210 for (nusers = 0; fread(&utmp, sizeof(utmp), 1, ut);) { 211 if (utmp.ut_name[0] == '\0') 212 continue; 213 if (!(stp = ttystat(utmp.ut_line, UT_LINESIZE))) 214 continue; /* corrupted record */ 215 ++nusers; 216 if (wcmd == 0) 217 continue; 218 if (sel_users) { 219 int usermatch; 220 char **user; 221 222 usermatch = 0; 223 for (user = sel_users; !usermatch && *user; user++) 224 if (!strncmp(utmp.ut_name, *user, UT_NAMESIZE)) 225 usermatch = 1; 226 if (!usermatch) 227 continue; 228 } 229 if ((ep = calloc(1, sizeof(struct entry))) == NULL) 230 errx(1, "calloc"); 231 *nextp = ep; 232 nextp = &ep->next; 233 memmove(&ep->utmp, &utmp, sizeof(struct utmp)); 234 ep->tdev = stp->st_rdev; 235 #ifdef CPU_CONSDEV 236 /* 237 * If this is the console device, attempt to ascertain 238 * the true console device dev_t. 239 */ 240 if (ep->tdev == 0) { 241 int mib[2]; 242 size_t size; 243 244 mib[0] = CTL_MACHDEP; 245 mib[1] = CPU_CONSDEV; 246 size = sizeof(dev_t); 247 (void)sysctl(mib, 2, &ep->tdev, &size, NULL, 0); 248 } 249 #endif 250 touched = stp->st_atime; 251 if (touched < ep->utmp.ut_time) { 252 /* tty untouched since before login */ 253 touched = ep->utmp.ut_time; 254 } 255 if ((ep->idle = now - touched) < 0) 256 ep->idle = 0; 257 } 258 (void)fclose(ut); 259 260 if (header || wcmd == 0) { 261 pr_header(&now, nusers); 262 if (wcmd == 0) 263 exit(0); 264 265 #define HEADER_USER "USER" 266 #define HEADER_TTY "TTY" 267 #define HEADER_FROM "FROM" 268 #define HEADER_LOGIN_IDLE "LOGIN@ IDLE " 269 #define HEADER_WHAT "WHAT\n" 270 #define WUSED (UT_NAMESIZE + UT_LINESIZE + UT_HOSTSIZE + \ 271 sizeof(HEADER_LOGIN_IDLE) + 3) /* header width incl. spaces */ 272 (void)printf("%-*.*s %-*.*s %-*.*s %s", 273 UT_NAMESIZE, UT_NAMESIZE, HEADER_USER, 274 UT_LINESIZE, UT_LINESIZE, HEADER_TTY, 275 UT_HOSTSIZE, UT_HOSTSIZE, HEADER_FROM, 276 HEADER_LOGIN_IDLE HEADER_WHAT); 277 } 278 279 if ((kp = kvm_getprocs(kd, KERN_PROC_ALL, 0, &nentries)) == NULL) 280 err(1, "%s", kvm_geterr(kd)); 281 for (i = 0; i < nentries; i++, kp++) { 282 if (kp->ki_stat == SIDL || kp->ki_stat == SZOMB) 283 continue; 284 for (ep = ehead; ep != NULL; ep = ep->next) { 285 if (ep->tdev == kp->ki_tdev) { 286 /* 287 * proc is associated with this terminal 288 */ 289 if (ep->kp == NULL && kp->ki_pgid == kp->ki_tpgid) { 290 /* 291 * Proc is 'most interesting' 292 */ 293 if (proc_compare(ep->kp, kp)) 294 ep->kp = kp; 295 } 296 /* 297 * Proc debug option info; add to debug 298 * list using kinfo_proc ki_spare[0] 299 * as next pointer; ptr to ptr avoids the 300 * ptr = long assumption. 301 */ 302 dkp = ep->dkp; 303 ep->dkp = kp; 304 debugproc(kp) = dkp; 305 } 306 } 307 } 308 if ((ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) == -1 && 309 ioctl(STDERR_FILENO, TIOCGWINSZ, &ws) == -1 && 310 ioctl(STDIN_FILENO, TIOCGWINSZ, &ws) == -1) || ws.ws_col == 0) 311 ttywidth = 79; 312 else 313 ttywidth = ws.ws_col - 1; 314 argwidth = ttywidth - WUSED; 315 if (argwidth < 4) 316 argwidth = 8; 317 for (ep = ehead; ep != NULL; ep = ep->next) { 318 if (ep->kp == NULL) { 319 ep->args = "-"; 320 continue; 321 } 322 ep->args = fmt_argv(kvm_getargv(kd, ep->kp, argwidth), 323 ep->kp->ki_comm, MAXCOMLEN); 324 if (ep->args == NULL) 325 err(1, NULL); 326 } 327 /* sort by idle time */ 328 if (sortidle && ehead != NULL) { 329 struct entry *from, *save; 330 331 from = ehead; 332 ehead = NULL; 333 while (from != NULL) { 334 for (nextp = &ehead; 335 (*nextp) && from->idle >= (*nextp)->idle; 336 nextp = &(*nextp)->next) 337 continue; 338 save = from; 339 from = from->next; 340 save->next = *nextp; 341 *nextp = save; 342 } 343 } 344 345 if (!nflag) { 346 if (gethostname(domain, sizeof(domain) - 1) < 0 || 347 (p = strchr(domain, '.')) == NULL) 348 domain[0] = '\0'; 349 else { 350 domain[sizeof(domain) - 1] = '\0'; 351 memmove(domain, p, strlen(p) + 1); 352 } 353 } 354 355 for (ep = ehead; ep != NULL; ep = ep->next) { 356 char host_buf[UT_HOSTSIZE + 1]; 357 358 host_buf[UT_HOSTSIZE] = '\0'; 359 strncpy(host_buf, ep->utmp.ut_host, UT_HOSTSIZE); 360 p = *host_buf ? host_buf : "-"; 361 if ((x = strchr(p, ':')) != NULL) 362 *x++ = '\0'; 363 if (!nflag && isdigit(*p) && (l = inet_addr(p)) != -1 && 364 (hp = gethostbyaddr((char *)&l, sizeof(l), AF_INET))) { 365 if (domain[0] != '\0') { 366 p = hp->h_name; 367 p += strlen(hp->h_name); 368 p -= strlen(domain); 369 if (p > hp->h_name && 370 strcasecmp(p, domain) == 0) 371 *p = '\0'; 372 } 373 p = hp->h_name; 374 } 375 if (nflag && *p && strcmp(p, "-") && 376 inet_addr(p) == INADDR_NONE) { 377 hp = gethostbyname(p); 378 379 if (hp != NULL) { 380 struct in_addr in; 381 382 memmove(&in, hp->h_addr, sizeof(in)); 383 p = inet_ntoa(in); 384 } 385 } 386 if (x) { 387 (void)snprintf(buf, sizeof(buf), "%s:%s", p, x); 388 p = buf; 389 } 390 if (dflag) { 391 for (dkp = ep->dkp; dkp != NULL; dkp = debugproc(dkp)) { 392 char *ptr; 393 394 ptr = fmt_argv(kvm_getargv(kd, dkp, argwidth), 395 dkp->ki_comm, MAXCOMLEN); 396 if (ptr == NULL) 397 ptr = "-"; 398 (void)printf("\t\t%-9d %s\n", 399 dkp->ki_pid, ptr); 400 } 401 } 402 (void)printf("%-*.*s %-*.*s %-*.*s ", 403 UT_NAMESIZE, UT_NAMESIZE, ep->utmp.ut_name, 404 UT_LINESIZE, UT_LINESIZE, 405 strncmp(ep->utmp.ut_line, "tty", 3) && 406 strncmp(ep->utmp.ut_line, "cua", 3) ? 407 ep->utmp.ut_line : ep->utmp.ut_line + 3, 408 UT_HOSTSIZE, UT_HOSTSIZE, *p ? p : "-"); 409 pr_attime(&ep->utmp.ut_time, &now); 410 longidle = pr_idle(ep->idle); 411 (void)printf("%.*s\n", argwidth - longidle, ep->args); 412 } 413 exit(0); 414 } 415 416 static void 417 pr_header(nowp, nusers) 418 time_t *nowp; 419 int nusers; 420 { 421 double avenrun[3]; 422 time_t uptime; 423 int days, hrs, i, mins, secs; 424 int mib[2]; 425 size_t size; 426 char buf[256]; 427 428 /* 429 * Print time of day. 430 */ 431 (void)strftime(buf, sizeof(buf) - 1, "%l:%M%p", localtime(nowp)); 432 buf[sizeof(buf) - 1] = '\0'; 433 (void)printf("%s ", buf); 434 435 /* 436 * Print how long system has been up. 437 * (Found by looking getting "boottime" from the kernel) 438 */ 439 mib[0] = CTL_KERN; 440 mib[1] = KERN_BOOTTIME; 441 size = sizeof(boottime); 442 if (sysctl(mib, 2, &boottime, &size, NULL, 0) != -1 && 443 boottime.tv_sec != 0) { 444 uptime = now - boottime.tv_sec; 445 uptime += 30; 446 days = uptime / 86400; 447 uptime %= 86400; 448 hrs = uptime / 3600; 449 uptime %= 3600; 450 mins = uptime / 60; 451 secs = uptime % 60; 452 (void)printf(" up"); 453 if (days > 0) 454 (void)printf(" %d day%s,", days, days > 1 ? "s" : ""); 455 if (hrs > 0 && mins > 0) 456 (void)printf(" %2d:%02d,", hrs, mins); 457 else if (hrs > 0) 458 (void)printf(" %d hr%s,", hrs, hrs > 1 ? "s" : ""); 459 else if (mins > 0) 460 (void)printf(" %d min%s,", mins, mins > 1 ? "s" : ""); 461 else 462 (void)printf(" %d sec%s,", secs, secs > 1 ? "s" : ""); 463 } 464 465 /* Print number of users logged in to system */ 466 (void)printf(" %d user%s", nusers, nusers == 1 ? "" : "s"); 467 468 /* 469 * Print 1, 5, and 15 minute load averages. 470 */ 471 if (getloadavg(avenrun, sizeof(avenrun) / sizeof(avenrun[0])) == -1) 472 (void)printf(", no load average information available\n"); 473 else { 474 (void)printf(", load averages:"); 475 for (i = 0; i < (sizeof(avenrun) / sizeof(avenrun[0])); i++) 476 (void)printf("%s %.2f", i > 0 ? "," : "", avenrun[i]); 477 (void)printf("\n"); 478 } 479 } 480 481 static struct stat * 482 ttystat(line, sz) 483 char *line; 484 int sz; 485 { 486 static struct stat sb; 487 char ttybuf[MAXPATHLEN]; 488 489 (void)snprintf(ttybuf, sizeof(ttybuf), "%s%.*s", _PATH_DEV, sz, line); 490 if (stat(ttybuf, &sb)) { 491 warn("%s", ttybuf); 492 return (NULL); 493 } 494 return (&sb); 495 } 496 497 static void 498 usage(wcmd) 499 int wcmd; 500 { 501 if (wcmd) 502 (void)fprintf(stderr, 503 "usage: w [-dhin] [-M core] [-N system] [user ...]\n"); 504 else 505 (void)fprintf(stderr, "usage: uptime\n"); 506 exit(1); 507 } 508 509 static int 510 this_is_uptime(s) 511 const char *s; 512 { 513 const char *u; 514 515 if ((u = strrchr(s, '/')) != NULL) 516 ++u; 517 else 518 u = s; 519 if (strcmp(u, "uptime") == 0) 520 return (0); 521 return (-1); 522 } 523