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 <locale.h> 76 #include <netdb.h> 77 #include <nlist.h> 78 #include <paths.h> 79 #include <stdio.h> 80 #include <stdlib.h> 81 #include <string.h> 82 #include <unistd.h> 83 #include <utmp.h> 84 #include <vis.h> 85 86 #include <arpa/nameser.h> 87 #include <resolv.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 time_t uptime; /* time of last reboot & elapsed time since */ 97 int ttywidth; /* width of tty */ 98 int argwidth; /* width of tty */ 99 int header = 1; /* true if -h flag: don't print heading */ 100 int nflag; /* true if -n flag: don't convert addrs */ 101 int dflag; /* true if -d flag: output debug info */ 102 int sortidle; /* sort by idle time */ 103 int use_ampm; /* use AM/PM time */ 104 int use_comma; /* use comma as floats separator */ 105 char **sel_users; /* login array of particular users selected */ 106 char domain[MAXHOSTNAMELEN]; 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 static void pr_header __P((time_t *, int)); 124 static struct stat *ttystat __P((char *, int)); 125 static void usage __P((int)); 126 static int this_is_uptime __P((const char *s)); 127 128 char *fmt_argv __P((char **, char *, int)); /* ../../bin/ps/fmt.c */ 129 130 int 131 main(argc, argv) 132 int argc; 133 char **argv; 134 { 135 struct kinfo_proc *kp; 136 struct kinfo_proc *dkp; 137 struct hostent *hp; 138 struct stat *stp; 139 FILE *ut; 140 u_long l; 141 time_t touched; 142 int ch, i, nentries, nusers, wcmd, longidle, dropgid; 143 char *memf, *nlistf, *p, *x; 144 char buf[MAXHOSTNAMELEN], errbuf[256]; 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 exit(0); 270 271 #define HEADER_USER "USER" 272 #define HEADER_TTY "TTY" 273 #define HEADER_FROM "FROM" 274 #define HEADER_LOGIN_IDLE "LOGIN@ IDLE " 275 #define HEADER_WHAT "WHAT\n" 276 #define WUSED (UT_NAMESIZE + UT_LINESIZE + UT_HOSTSIZE + \ 277 sizeof(HEADER_LOGIN_IDLE) + 3) /* header width incl. spaces */ 278 (void)printf("%-*.*s %-*.*s %-*.*s %s", 279 UT_NAMESIZE, UT_NAMESIZE, HEADER_USER, 280 UT_LINESIZE, UT_LINESIZE, HEADER_TTY, 281 UT_HOSTSIZE, UT_HOSTSIZE, HEADER_FROM, 282 HEADER_LOGIN_IDLE HEADER_WHAT); 283 } 284 285 if ((kp = kvm_getprocs(kd, KERN_PROC_ALL, 0, &nentries)) == NULL) 286 err(1, "%s", kvm_geterr(kd)); 287 for (i = 0; i < nentries; i++, kp++) { 288 if (kp->ki_stat == SIDL || kp->ki_stat == SZOMB) 289 continue; 290 for (ep = ehead; ep != NULL; ep = ep->next) { 291 if (ep->tdev == kp->ki_tdev) { 292 /* 293 * proc is associated with this terminal 294 */ 295 if (ep->kp == NULL && kp->ki_pgid == kp->ki_tpgid) { 296 /* 297 * Proc is 'most interesting' 298 */ 299 if (proc_compare(ep->kp, kp)) 300 ep->kp = kp; 301 } 302 /* 303 * Proc debug option info; add to debug 304 * list using kinfo_proc ki_spare[0] 305 * as next pointer; ptr to ptr avoids the 306 * ptr = long assumption. 307 */ 308 dkp = ep->dkp; 309 ep->dkp = kp; 310 debugproc(kp) = dkp; 311 } 312 } 313 } 314 if ((ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) == -1 && 315 ioctl(STDERR_FILENO, TIOCGWINSZ, &ws) == -1 && 316 ioctl(STDIN_FILENO, TIOCGWINSZ, &ws) == -1) || ws.ws_col == 0) 317 ttywidth = 79; 318 else 319 ttywidth = ws.ws_col - 1; 320 argwidth = ttywidth - WUSED; 321 if (argwidth < 4) 322 argwidth = 8; 323 for (ep = ehead; ep != NULL; ep = ep->next) { 324 if (ep->kp == NULL) { 325 ep->args = "-"; 326 continue; 327 } 328 ep->args = fmt_argv(kvm_getargv(kd, ep->kp, argwidth), 329 ep->kp->ki_comm, MAXCOMLEN); 330 if (ep->args == NULL) 331 err(1, NULL); 332 } 333 /* sort by idle time */ 334 if (sortidle && ehead != NULL) { 335 struct entry *from, *save; 336 337 from = ehead; 338 ehead = NULL; 339 while (from != NULL) { 340 for (nextp = &ehead; 341 (*nextp) && from->idle >= (*nextp)->idle; 342 nextp = &(*nextp)->next) 343 continue; 344 save = from; 345 from = from->next; 346 save->next = *nextp; 347 *nextp = save; 348 } 349 } 350 351 if (!nflag) { 352 if (gethostname(domain, sizeof(domain) - 1) < 0 || 353 (p = strchr(domain, '.')) == NULL) 354 domain[0] = '\0'; 355 else { 356 domain[sizeof(domain) - 1] = '\0'; 357 memmove(domain, p, strlen(p) + 1); 358 } 359 } 360 361 for (ep = ehead; ep != NULL; ep = ep->next) { 362 char host_buf[UT_HOSTSIZE + 1]; 363 364 host_buf[UT_HOSTSIZE] = '\0'; 365 strncpy(host_buf, ep->utmp.ut_host, UT_HOSTSIZE); 366 p = *host_buf ? host_buf : "-"; 367 if ((x = strchr(p, ':')) != NULL) 368 *x++ = '\0'; 369 if (!nflag && isdigit(*p) && (l = inet_addr(p)) != -1 && 370 (hp = gethostbyaddr((char *)&l, sizeof(l), AF_INET))) { 371 if (domain[0] != '\0') { 372 p = hp->h_name; 373 p += strlen(hp->h_name); 374 p -= strlen(domain); 375 if (p > hp->h_name && 376 strcasecmp(p, domain) == 0) 377 *p = '\0'; 378 } 379 p = hp->h_name; 380 } 381 if (nflag && *p && strcmp(p, "-") && 382 inet_addr(p) == INADDR_NONE) { 383 hp = gethostbyname(p); 384 385 if (hp != NULL) { 386 struct in_addr in; 387 388 memmove(&in, hp->h_addr, sizeof(in)); 389 p = inet_ntoa(in); 390 } 391 } 392 if (x) { 393 (void)snprintf(buf, sizeof(buf), "%s:%s", p, x); 394 p = buf; 395 } 396 if (dflag) { 397 for (dkp = ep->dkp; dkp != NULL; dkp = debugproc(dkp)) { 398 char *ptr; 399 400 ptr = fmt_argv(kvm_getargv(kd, dkp, argwidth), 401 dkp->ki_comm, MAXCOMLEN); 402 if (ptr == NULL) 403 ptr = "-"; 404 (void)printf("\t\t%-9d %s\n", 405 dkp->ki_pid, ptr); 406 } 407 } 408 (void)printf("%-*.*s %-*.*s %-*.*s ", 409 UT_NAMESIZE, UT_NAMESIZE, ep->utmp.ut_name, 410 UT_LINESIZE, UT_LINESIZE, 411 strncmp(ep->utmp.ut_line, "tty", 3) && 412 strncmp(ep->utmp.ut_line, "cua", 3) ? 413 ep->utmp.ut_line : ep->utmp.ut_line + 3, 414 UT_HOSTSIZE, UT_HOSTSIZE, *p ? p : "-"); 415 pr_attime(&ep->utmp.ut_time, &now); 416 longidle = pr_idle(ep->idle); 417 (void)printf("%.*s\n", argwidth - longidle, ep->args); 418 } 419 exit(0); 420 } 421 422 static void 423 pr_header(nowp, nusers) 424 time_t *nowp; 425 int nusers; 426 { 427 double avenrun[3]; 428 time_t uptime; 429 int days, hrs, i, mins, secs; 430 int mib[2]; 431 size_t size; 432 char buf[256]; 433 434 /* 435 * Print time of day. 436 */ 437 (void)strftime(buf, sizeof(buf) - 1, 438 use_ampm ? "%l:%M%p" : "%k:%M", localtime(nowp)); 439 buf[sizeof(buf) - 1] = '\0'; 440 (void)printf("%s ", buf); 441 442 /* 443 * Print how long system has been up. 444 * (Found by looking getting "boottime" from the kernel) 445 */ 446 mib[0] = CTL_KERN; 447 mib[1] = KERN_BOOTTIME; 448 size = sizeof(boottime); 449 if (sysctl(mib, 2, &boottime, &size, NULL, 0) != -1 && 450 boottime.tv_sec != 0) { 451 uptime = now - boottime.tv_sec; 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 < (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