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 <limits.h> 76 #include <locale.h> 77 #include <netdb.h> 78 #include <nlist.h> 79 #include <paths.h> 80 #include <stdio.h> 81 #include <stdlib.h> 82 #include <string.h> 83 #include <unistd.h> 84 #include <utmp.h> 85 #include <vis.h> 86 87 #include <arpa/nameser.h> 88 #include <resolv.h> 89 90 #include "extern.h" 91 92 struct timeval boottime; 93 struct utmp utmp; 94 struct winsize ws; 95 kvm_t *kd; 96 time_t now; /* the current time of day */ 97 time_t uptime; /* time of last reboot & elapsed time since */ 98 int ttywidth; /* width of tty */ 99 int argwidth; /* width of tty */ 100 int header = 1; /* true if -h flag: don't print heading */ 101 int nflag; /* true if -n flag: don't convert addrs */ 102 int dflag; /* true if -d flag: output debug info */ 103 int sortidle; /* sort by idle time */ 104 int use_ampm; /* use AM/PM time */ 105 int use_comma; /* use comma as floats separator */ 106 char **sel_users; /* login array of particular users selected */ 107 char domain[MAXHOSTNAMELEN]; 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 static void pr_header __P((time_t *, int)); 125 static struct stat *ttystat __P((char *, int)); 126 static void usage __P((int)); 127 static int this_is_uptime __P((const char *s)); 128 129 char *fmt_argv __P((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 hostent *hp; 139 struct stat *stp; 140 FILE *ut; 141 u_long l; 142 time_t touched; 143 int ch, i, nentries, nusers, wcmd, longidle, dropgid; 144 char *memf, *nlistf, *p, *x; 145 char buf[MAXHOSTNAMELEN], errbuf[_POSIX2_LINE_MAX]; 146 147 (void)setlocale(LC_ALL, ""); 148 use_ampm = (*nl_langinfo(T_FMT_AMPM) != '\0'); 149 use_comma = (*nl_langinfo(RADIXCHAR) != ','); 150 151 /* Are we w(1) or uptime(1)? */ 152 if (this_is_uptime(argv[0]) == 0) { 153 wcmd = 0; 154 p = ""; 155 } else { 156 wcmd = 1; 157 p = "dhiflM:N:nsuw"; 158 } 159 160 dropgid = 0; 161 memf = nlistf = _PATH_DEVNULL; 162 while ((ch = getopt(argc, argv, p)) != -1) 163 switch (ch) { 164 case 'd': 165 dflag = 1; 166 break; 167 case 'h': 168 header = 0; 169 break; 170 case 'i': 171 sortidle = 1; 172 break; 173 case 'M': 174 header = 0; 175 memf = optarg; 176 dropgid = 1; 177 break; 178 case 'N': 179 nlistf = optarg; 180 dropgid = 1; 181 break; 182 case 'n': 183 nflag = 1; 184 break; 185 case 'f': case 'l': case 's': case 'u': case 'w': 186 warnx("[-flsuw] no longer supported"); 187 /* FALLTHROUGH */ 188 case '?': 189 default: 190 usage(wcmd); 191 } 192 argc -= optind; 193 argv += optind; 194 195 if (!(_res.options & RES_INIT)) 196 res_init(); 197 _res.retrans = 2; /* resolver timeout to 2 seconds per try */ 198 _res.retry = 1; /* only try once.. */ 199 200 /* 201 * Discard setgid privileges if not the running kernel so that bad 202 * guys can't print interesting stuff from kernel memory. 203 */ 204 if (dropgid) 205 setgid(getgid()); 206 207 if ((kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf)) == NULL) 208 errx(1, "%s", errbuf); 209 210 (void)time(&now); 211 if ((ut = fopen(_PATH_UTMP, "r")) == NULL) 212 err(1, "%s", _PATH_UTMP); 213 214 if (*argv) 215 sel_users = argv; 216 217 for (nusers = 0; fread(&utmp, sizeof(utmp), 1, ut);) { 218 if (utmp.ut_name[0] == '\0') 219 continue; 220 if (!(stp = ttystat(utmp.ut_line, UT_LINESIZE))) 221 continue; /* corrupted record */ 222 ++nusers; 223 if (wcmd == 0) 224 continue; 225 if (sel_users) { 226 int usermatch; 227 char **user; 228 229 usermatch = 0; 230 for (user = sel_users; !usermatch && *user; user++) 231 if (!strncmp(utmp.ut_name, *user, UT_NAMESIZE)) 232 usermatch = 1; 233 if (!usermatch) 234 continue; 235 } 236 if ((ep = calloc(1, sizeof(struct entry))) == NULL) 237 errx(1, "calloc"); 238 *nextp = ep; 239 nextp = &ep->next; 240 memmove(&ep->utmp, &utmp, sizeof(struct utmp)); 241 ep->tdev = stp->st_rdev; 242 #ifdef CPU_CONSDEV 243 /* 244 * If this is the console device, attempt to ascertain 245 * the true console device dev_t. 246 */ 247 if (ep->tdev == 0) { 248 int mib[2]; 249 size_t size; 250 251 mib[0] = CTL_MACHDEP; 252 mib[1] = CPU_CONSDEV; 253 size = sizeof(dev_t); 254 (void)sysctl(mib, 2, &ep->tdev, &size, NULL, 0); 255 } 256 #endif 257 touched = stp->st_atime; 258 if (touched < ep->utmp.ut_time) { 259 /* tty untouched since before login */ 260 touched = ep->utmp.ut_time; 261 } 262 if ((ep->idle = now - touched) < 0) 263 ep->idle = 0; 264 } 265 (void)fclose(ut); 266 267 if (header || wcmd == 0) { 268 pr_header(&now, nusers); 269 if (wcmd == 0) { 270 (void)kvm_close(kd); 271 exit(0); 272 } 273 274 #define HEADER_USER "USER" 275 #define HEADER_TTY "TTY" 276 #define HEADER_FROM "FROM" 277 #define HEADER_LOGIN_IDLE "LOGIN@ IDLE " 278 #define HEADER_WHAT "WHAT\n" 279 #define WUSED (UT_NAMESIZE + UT_LINESIZE + UT_HOSTSIZE + \ 280 sizeof(HEADER_LOGIN_IDLE) + 3) /* header width incl. spaces */ 281 (void)printf("%-*.*s %-*.*s %-*.*s %s", 282 UT_NAMESIZE, UT_NAMESIZE, HEADER_USER, 283 UT_LINESIZE, UT_LINESIZE, HEADER_TTY, 284 UT_HOSTSIZE, UT_HOSTSIZE, HEADER_FROM, 285 HEADER_LOGIN_IDLE HEADER_WHAT); 286 } 287 288 if ((kp = kvm_getprocs(kd, KERN_PROC_ALL, 0, &nentries)) == NULL) 289 err(1, "%s", kvm_geterr(kd)); 290 for (i = 0; i < nentries; i++, kp++) { 291 if (kp->ki_stat == SIDL || kp->ki_stat == SZOMB) 292 continue; 293 for (ep = ehead; ep != NULL; ep = ep->next) { 294 if (ep->tdev == kp->ki_tdev) { 295 /* 296 * proc is associated with this terminal 297 */ 298 if (ep->kp == NULL && kp->ki_pgid == kp->ki_tpgid) { 299 /* 300 * Proc is 'most interesting' 301 */ 302 if (proc_compare(ep->kp, kp)) 303 ep->kp = kp; 304 } 305 /* 306 * Proc debug option info; add to debug 307 * list using kinfo_proc ki_spare[0] 308 * as next pointer; ptr to ptr avoids the 309 * ptr = long assumption. 310 */ 311 dkp = ep->dkp; 312 ep->dkp = kp; 313 debugproc(kp) = dkp; 314 } 315 } 316 } 317 if ((ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) == -1 && 318 ioctl(STDERR_FILENO, TIOCGWINSZ, &ws) == -1 && 319 ioctl(STDIN_FILENO, TIOCGWINSZ, &ws) == -1) || ws.ws_col == 0) 320 ttywidth = 79; 321 else 322 ttywidth = ws.ws_col - 1; 323 argwidth = ttywidth - WUSED; 324 if (argwidth < 4) 325 argwidth = 8; 326 for (ep = ehead; ep != NULL; ep = ep->next) { 327 if (ep->kp == NULL) { 328 ep->args = "-"; 329 continue; 330 } 331 ep->args = fmt_argv(kvm_getargv(kd, ep->kp, argwidth), 332 ep->kp->ki_comm, MAXCOMLEN); 333 if (ep->args == NULL) 334 err(1, NULL); 335 } 336 /* sort by idle time */ 337 if (sortidle && ehead != NULL) { 338 struct entry *from, *save; 339 340 from = ehead; 341 ehead = NULL; 342 while (from != NULL) { 343 for (nextp = &ehead; 344 (*nextp) && from->idle >= (*nextp)->idle; 345 nextp = &(*nextp)->next) 346 continue; 347 save = from; 348 from = from->next; 349 save->next = *nextp; 350 *nextp = save; 351 } 352 } 353 354 if (!nflag) { 355 if (gethostname(domain, sizeof(domain) - 1) < 0 || 356 (p = strchr(domain, '.')) == NULL) 357 domain[0] = '\0'; 358 else { 359 domain[sizeof(domain) - 1] = '\0'; 360 memmove(domain, p, strlen(p) + 1); 361 } 362 } 363 364 for (ep = ehead; ep != NULL; ep = ep->next) { 365 char host_buf[UT_HOSTSIZE + 1]; 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 = strchr(p, ':')) != NULL) 371 *x++ = '\0'; 372 if (!nflag && isdigit(*p) && (l = inet_addr(p)) != -1 && 373 (hp = gethostbyaddr((char *)&l, sizeof(l), AF_INET))) { 374 if (domain[0] != '\0') { 375 p = hp->h_name; 376 p += strlen(hp->h_name); 377 p -= strlen(domain); 378 if (p > hp->h_name && 379 strcasecmp(p, domain) == 0) 380 *p = '\0'; 381 } 382 p = hp->h_name; 383 } 384 if (nflag && *p && strcmp(p, "-") && 385 inet_addr(p) == INADDR_NONE) { 386 hp = gethostbyname(p); 387 388 if (hp != NULL) { 389 struct in_addr in; 390 391 memmove(&in, hp->h_addr, sizeof(in)); 392 p = inet_ntoa(in); 393 } 394 } 395 if (x) { 396 (void)snprintf(buf, sizeof(buf), "%s:%s", p, x); 397 p = buf; 398 } 399 if (dflag) { 400 for (dkp = ep->dkp; dkp != NULL; dkp = debugproc(dkp)) { 401 char *ptr; 402 403 ptr = fmt_argv(kvm_getargv(kd, dkp, argwidth), 404 dkp->ki_comm, MAXCOMLEN); 405 if (ptr == NULL) 406 ptr = "-"; 407 (void)printf("\t\t%-9d %s\n", 408 dkp->ki_pid, ptr); 409 } 410 } 411 (void)printf("%-*.*s %-*.*s %-*.*s ", 412 UT_NAMESIZE, UT_NAMESIZE, ep->utmp.ut_name, 413 UT_LINESIZE, UT_LINESIZE, 414 strncmp(ep->utmp.ut_line, "tty", 3) && 415 strncmp(ep->utmp.ut_line, "cua", 3) ? 416 ep->utmp.ut_line : ep->utmp.ut_line + 3, 417 UT_HOSTSIZE, UT_HOSTSIZE, *p ? p : "-"); 418 pr_attime(&ep->utmp.ut_time, &now); 419 longidle = pr_idle(ep->idle); 420 (void)printf("%.*s\n", argwidth - longidle, ep->args); 421 } 422 (void)kvm_close(kd); 423 exit(0); 424 } 425 426 static void 427 pr_header(nowp, nusers) 428 time_t *nowp; 429 int nusers; 430 { 431 double avenrun[3]; 432 time_t uptime; 433 int days, hrs, i, mins, secs; 434 int mib[2]; 435 size_t size; 436 char buf[256]; 437 438 /* 439 * Print time of day. 440 */ 441 (void)strftime(buf, sizeof(buf) - 1, 442 use_ampm ? "%l:%M%p" : "%k:%M", localtime(nowp)); 443 buf[sizeof(buf) - 1] = '\0'; 444 (void)printf("%s ", buf); 445 446 /* 447 * Print how long system has been up. 448 * (Found by looking getting "boottime" from the kernel) 449 */ 450 mib[0] = CTL_KERN; 451 mib[1] = KERN_BOOTTIME; 452 size = sizeof(boottime); 453 if (sysctl(mib, 2, &boottime, &size, NULL, 0) != -1 && 454 boottime.tv_sec != 0) { 455 uptime = now - boottime.tv_sec; 456 uptime += 30; 457 days = uptime / 86400; 458 uptime %= 86400; 459 hrs = uptime / 3600; 460 uptime %= 3600; 461 mins = uptime / 60; 462 secs = uptime % 60; 463 (void)printf(" up"); 464 if (days > 0) 465 (void)printf(" %d day%s,", days, days > 1 ? "s" : ""); 466 if (hrs > 0 && mins > 0) 467 (void)printf(" %2d:%02d,", hrs, mins); 468 else if (hrs > 0) 469 (void)printf(" %d hr%s,", hrs, hrs > 1 ? "s" : ""); 470 else if (mins > 0) 471 (void)printf(" %d min%s,", mins, mins > 1 ? "s" : ""); 472 else 473 (void)printf(" %d sec%s,", secs, secs > 1 ? "s" : ""); 474 } 475 476 /* Print number of users logged in to system */ 477 (void)printf(" %d user%s", nusers, nusers == 1 ? "" : "s"); 478 479 /* 480 * Print 1, 5, and 15 minute load averages. 481 */ 482 if (getloadavg(avenrun, sizeof(avenrun) / sizeof(avenrun[0])) == -1) 483 (void)printf(", no load average information available\n"); 484 else { 485 (void)printf(", load averages:"); 486 for (i = 0; i < (sizeof(avenrun) / sizeof(avenrun[0])); i++) { 487 if (use_comma && i > 0) 488 (void)printf(","); 489 (void)printf(" %.2f", avenrun[i]); 490 } 491 (void)printf("\n"); 492 } 493 } 494 495 static struct stat * 496 ttystat(line, sz) 497 char *line; 498 int sz; 499 { 500 static struct stat sb; 501 char ttybuf[MAXPATHLEN]; 502 503 (void)snprintf(ttybuf, sizeof(ttybuf), "%s%.*s", _PATH_DEV, sz, line); 504 if (stat(ttybuf, &sb)) { 505 warn("%s", ttybuf); 506 return (NULL); 507 } 508 return (&sb); 509 } 510 511 static void 512 usage(wcmd) 513 int wcmd; 514 { 515 if (wcmd) 516 (void)fprintf(stderr, 517 "usage: w [-dhin] [-M core] [-N system] [user ...]\n"); 518 else 519 (void)fprintf(stderr, "usage: uptime\n"); 520 exit(1); 521 } 522 523 static int 524 this_is_uptime(s) 525 const char *s; 526 { 527 const char *u; 528 529 if ((u = strrchr(s, '/')) != NULL) 530 ++u; 531 else 532 u = s; 533 if (strcmp(u, "uptime") == 0) 534 return (0); 535 return (-1); 536 } 537