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 * @(#) Copyright (c) 1980, 1991, 1993, 1994 The Regents of the University of California. All rights reserved. 34 * @(#)w.c 8.4 (Berkeley) 4/16/94 35 * $FreeBSD: src/usr.bin/w/w.c,v 1.38.2.6 2002/03/12 19:51:51 phantom Exp $ 36 * $DragonFly: src/usr.bin/w/w.c,v 1.3 2003/07/13 05:45:17 dillon Exp $ 37 */ 38 39 /* 40 * w - print system status (who and what) 41 * 42 * This program is similar to the systat command on Tenex/Tops 10/20 43 * 44 */ 45 #include <sys/param.h> 46 #include <sys/time.h> 47 #include <sys/stat.h> 48 #include <sys/sysctl.h> 49 #include <sys/proc.h> 50 #include <sys/user.h> 51 #include <sys/ioctl.h> 52 #include <sys/socket.h> 53 #include <sys/tty.h> 54 55 #include <machine/cpu.h> 56 #include <netinet/in.h> 57 #include <arpa/inet.h> 58 59 #include <ctype.h> 60 #include <err.h> 61 #include <errno.h> 62 #include <fcntl.h> 63 #include <kvm.h> 64 #include <limits.h> 65 #include <langinfo.h> 66 #include <locale.h> 67 #include <netdb.h> 68 #include <nlist.h> 69 #include <paths.h> 70 #include <stdio.h> 71 #include <stdlib.h> 72 #include <string.h> 73 #include <unistd.h> 74 #include <utmp.h> 75 #include <vis.h> 76 77 #include <arpa/nameser.h> 78 #include <resolv.h> 79 80 #include "extern.h" 81 82 struct timeval boottime; 83 struct utmp utmp; 84 struct winsize ws; 85 kvm_t *kd; 86 time_t now; /* the current time of day */ 87 time_t uptime; /* time of last reboot & elapsed time since */ 88 int ttywidth; /* width of tty */ 89 int argwidth; /* width of tty */ 90 int header = 1; /* true if -h flag: don't print heading */ 91 int nflag; /* true if -n flag: don't convert addrs */ 92 int dflag; /* true if -d flag: output debug info */ 93 int sortidle; /* sort by idle time */ 94 int use_ampm; /* use AM/PM time */ 95 int use_comma; /* use comma as floats separator */ 96 char **sel_users; /* login array of particular users selected */ 97 char domain[MAXHOSTNAMELEN]; 98 99 /* 100 * One of these per active utmp entry. 101 */ 102 struct entry { 103 struct entry *next; 104 struct utmp utmp; 105 dev_t tdev; /* dev_t of terminal */ 106 time_t idle; /* idle time of terminal in seconds */ 107 struct kinfo_proc *kp; /* `most interesting' proc */ 108 char *args; /* arg list of interesting process */ 109 struct kinfo_proc *dkp; /* debug option proc list */ 110 } *ep, *ehead = NULL, **nextp = &ehead; 111 112 #define debugproc(p) *((struct kinfo_proc **)&(p)->kp_eproc.e_spare[0]) 113 114 static void pr_header __P((time_t *, int)); 115 static struct stat *ttystat __P((char *, int)); 116 static void usage __P((int)); 117 static int this_is_uptime __P((const char *s)); 118 119 char *fmt_argv __P((char **, char *, int)); /* ../../bin/ps/fmt.c */ 120 121 int 122 main(argc, argv) 123 int argc; 124 char **argv; 125 { 126 struct kinfo_proc *kp; 127 struct kinfo_proc *dkp; 128 struct hostent *hp; 129 struct stat *stp; 130 FILE *ut; 131 in_addr_t l; 132 time_t touched; 133 int ch, i, nentries, nusers, wcmd, longidle, dropgid; 134 char *memf, *nlistf, *p, *x; 135 char buf[MAXHOSTNAMELEN], errbuf[_POSIX2_LINE_MAX]; 136 137 (void)setlocale(LC_ALL, ""); 138 use_ampm = (*nl_langinfo(T_FMT_AMPM) != '\0'); 139 use_comma = (*nl_langinfo(RADIXCHAR) != ','); 140 141 /* Are we w(1) or uptime(1)? */ 142 if (this_is_uptime(argv[0]) == 0) { 143 wcmd = 0; 144 p = ""; 145 } else { 146 wcmd = 1; 147 p = "dhiflM:N:nsuw"; 148 } 149 150 dropgid = 0; 151 memf = nlistf = _PATH_DEVNULL; 152 while ((ch = getopt(argc, argv, p)) != -1) 153 switch (ch) { 154 case 'd': 155 dflag = 1; 156 break; 157 case 'h': 158 header = 0; 159 break; 160 case 'i': 161 sortidle = 1; 162 break; 163 case 'M': 164 header = 0; 165 memf = optarg; 166 dropgid = 1; 167 break; 168 case 'N': 169 nlistf = optarg; 170 dropgid = 1; 171 break; 172 case 'n': 173 nflag = 1; 174 break; 175 case 'f': case 'l': case 's': case 'u': case 'w': 176 warnx("[-flsuw] no longer supported"); 177 /* FALLTHROUGH */ 178 case '?': 179 default: 180 usage(wcmd); 181 } 182 argc -= optind; 183 argv += optind; 184 185 if (!(_res.options & RES_INIT)) 186 res_init(); 187 _res.retrans = 2; /* resolver timeout to 2 seconds per try */ 188 _res.retry = 1; /* only try once.. */ 189 190 /* 191 * Discard setgid privileges if not the running kernel so that bad 192 * guys can't print interesting stuff from kernel memory. 193 */ 194 if (dropgid) 195 setgid(getgid()); 196 197 if ((kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf)) == NULL) 198 errx(1, "%s", errbuf); 199 200 (void)time(&now); 201 if ((ut = fopen(_PATH_UTMP, "r")) == NULL) 202 err(1, "%s", _PATH_UTMP); 203 204 if (*argv) 205 sel_users = argv; 206 207 for (nusers = 0; fread(&utmp, sizeof(utmp), 1, ut);) { 208 if (utmp.ut_name[0] == '\0') 209 continue; 210 if (!(stp = ttystat(utmp.ut_line, UT_LINESIZE))) 211 continue; /* corrupted record */ 212 ++nusers; 213 if (wcmd == 0) 214 continue; 215 if (sel_users) { 216 int usermatch; 217 char **user; 218 219 usermatch = 0; 220 for (user = sel_users; !usermatch && *user; user++) 221 if (!strncmp(utmp.ut_name, *user, UT_NAMESIZE)) 222 usermatch = 1; 223 if (!usermatch) 224 continue; 225 } 226 if ((ep = calloc(1, sizeof(struct entry))) == NULL) 227 errx(1, "calloc"); 228 *nextp = ep; 229 nextp = &ep->next; 230 memmove(&ep->utmp, &utmp, sizeof(struct utmp)); 231 ep->tdev = stp->st_rdev; 232 #ifdef CPU_CONSDEV 233 /* 234 * If this is the console device, attempt to ascertain 235 * the true console device dev_t. 236 */ 237 if (ep->tdev == 0) { 238 int mib[2]; 239 size_t size; 240 241 mib[0] = CTL_MACHDEP; 242 mib[1] = CPU_CONSDEV; 243 size = sizeof(dev_t); 244 (void)sysctl(mib, 2, &ep->tdev, &size, NULL, 0); 245 } 246 #endif 247 touched = stp->st_atime; 248 if (touched < ep->utmp.ut_time) { 249 /* tty untouched since before login */ 250 touched = ep->utmp.ut_time; 251 } 252 if ((ep->idle = now - touched) < 0) 253 ep->idle = 0; 254 } 255 (void)fclose(ut); 256 257 if (header || wcmd == 0) { 258 pr_header(&now, nusers); 259 if (wcmd == 0) { 260 (void)kvm_close(kd); 261 exit(0); 262 } 263 264 #define HEADER_USER "USER" 265 #define HEADER_TTY "TTY" 266 #define HEADER_FROM "FROM" 267 #define HEADER_LOGIN_IDLE "LOGIN@ IDLE " 268 #define HEADER_WHAT "WHAT\n" 269 #define WUSED (UT_NAMESIZE + UT_LINESIZE + UT_HOSTSIZE + \ 270 sizeof(HEADER_LOGIN_IDLE) + 3) /* header width incl. spaces */ 271 (void)printf("%-*.*s %-*.*s %-*.*s %s", 272 UT_NAMESIZE, UT_NAMESIZE, HEADER_USER, 273 UT_LINESIZE, UT_LINESIZE, HEADER_TTY, 274 UT_HOSTSIZE, UT_HOSTSIZE, HEADER_FROM, 275 HEADER_LOGIN_IDLE HEADER_WHAT); 276 } 277 278 if ((kp = kvm_getprocs(kd, KERN_PROC_ALL, 0, &nentries)) == NULL) 279 err(1, "%s", kvm_geterr(kd)); 280 for (i = 0; i < nentries; i++, kp++) { 281 struct proc *pr = &kp->kp_proc; 282 struct eproc *e; 283 284 if (pr->p_stat == SIDL || pr->p_stat == SZOMB) 285 continue; 286 e = &kp->kp_eproc; 287 for (ep = ehead; ep != NULL; ep = ep->next) { 288 if (ep->tdev == e->e_tdev) { 289 /* 290 * proc is associated with this terminal 291 */ 292 if (ep->kp == NULL && e->e_pgid == e->e_tpgid) { 293 /* 294 * Proc is 'most interesting' 295 */ 296 if (proc_compare(&ep->kp->kp_proc, pr)) 297 ep->kp = kp; 298 } 299 /* 300 * Proc debug option info; add to debug 301 * list using kinfo_proc kp_eproc.e_spare 302 * as next pointer; ptr to ptr avoids the 303 * ptr = long assumption. 304 */ 305 dkp = ep->dkp; 306 ep->dkp = kp; 307 debugproc(kp) = dkp; 308 } 309 } 310 } 311 if ((ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) == -1 && 312 ioctl(STDERR_FILENO, TIOCGWINSZ, &ws) == -1 && 313 ioctl(STDIN_FILENO, TIOCGWINSZ, &ws) == -1) || ws.ws_col == 0) 314 ttywidth = 79; 315 else 316 ttywidth = ws.ws_col - 1; 317 argwidth = ttywidth - WUSED; 318 if (argwidth < 4) 319 argwidth = 8; 320 for (ep = ehead; ep != NULL; ep = ep->next) { 321 if (ep->kp == NULL) { 322 ep->args = "-"; 323 continue; 324 } 325 ep->args = fmt_argv(kvm_getargv(kd, ep->kp, argwidth), 326 ep->kp->kp_thread.td_comm, MAXCOMLEN); 327 if (ep->args == NULL) 328 err(1, NULL); 329 } 330 /* sort by idle time */ 331 if (sortidle && ehead != NULL) { 332 struct entry *from, *save; 333 334 from = ehead; 335 ehead = NULL; 336 while (from != NULL) { 337 for (nextp = &ehead; 338 (*nextp) && from->idle >= (*nextp)->idle; 339 nextp = &(*nextp)->next) 340 continue; 341 save = from; 342 from = from->next; 343 save->next = *nextp; 344 *nextp = save; 345 } 346 } 347 348 if (!nflag) { 349 if (gethostname(domain, sizeof(domain) - 1) < 0 || 350 (p = strchr(domain, '.')) == NULL) 351 domain[0] = '\0'; 352 else { 353 domain[sizeof(domain) - 1] = '\0'; 354 memmove(domain, p, strlen(p) + 1); 355 } 356 } 357 358 for (ep = ehead; ep != NULL; ep = ep->next) { 359 char host_buf[UT_HOSTSIZE + 1]; 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 = strchr(p, ':')) != NULL) 365 *x++ = '\0'; 366 if (!nflag && isdigit(*p) && (l = inet_addr(p)) != -1 && 367 (hp = gethostbyaddr((char *)&l, sizeof(l), AF_INET))) { 368 if (domain[0] != '\0') { 369 p = hp->h_name; 370 p += strlen(hp->h_name); 371 p -= strlen(domain); 372 if (p > hp->h_name && 373 strcasecmp(p, domain) == 0) 374 *p = '\0'; 375 } 376 p = hp->h_name; 377 } 378 if (nflag && *p && strcmp(p, "-") && 379 inet_addr(p) == INADDR_NONE) { 380 hp = gethostbyname(p); 381 382 if (hp != NULL) { 383 struct in_addr in; 384 385 memmove(&in, hp->h_addr, sizeof(in)); 386 p = inet_ntoa(in); 387 } 388 } 389 if (x) { 390 (void)snprintf(buf, sizeof(buf), "%s:%s", p, x); 391 p = buf; 392 } 393 if (dflag) { 394 for (dkp = ep->dkp; dkp != NULL; dkp = debugproc(dkp)) { 395 char *ptr; 396 397 ptr = fmt_argv(kvm_getargv(kd, dkp, argwidth), 398 dkp->kp_thread.td_comm, MAXCOMLEN); 399 if (ptr == NULL) 400 ptr = "-"; 401 (void)printf("\t\t%-9d %s\n", 402 dkp->kp_proc.p_pid, ptr); 403 } 404 } 405 (void)printf("%-*.*s %-*.*s %-*.*s ", 406 UT_NAMESIZE, UT_NAMESIZE, ep->utmp.ut_name, 407 UT_LINESIZE, UT_LINESIZE, 408 strncmp(ep->utmp.ut_line, "tty", 3) && 409 strncmp(ep->utmp.ut_line, "cua", 3) ? 410 ep->utmp.ut_line : ep->utmp.ut_line + 3, 411 UT_HOSTSIZE, UT_HOSTSIZE, *p ? p : "-"); 412 pr_attime(&ep->utmp.ut_time, &now); 413 longidle = pr_idle(ep->idle); 414 (void)printf("%.*s\n", argwidth - longidle, ep->args); 415 } 416 (void)kvm_close(kd); 417 exit(0); 418 } 419 420 static void 421 pr_header(nowp, nusers) 422 time_t *nowp; 423 int nusers; 424 { 425 double avenrun[3]; 426 time_t uptime; 427 int days, hrs, i, mins, secs; 428 int mib[2]; 429 size_t size; 430 char buf[256]; 431 432 /* 433 * Print time of day. 434 */ 435 (void)strftime(buf, sizeof(buf) - 1, 436 use_ampm ? "%l:%M%p" : "%k:%M", localtime(nowp)); 437 buf[sizeof(buf) - 1] = '\0'; 438 (void)printf("%s ", buf); 439 440 /* 441 * Print how long system has been up. 442 * (Found by looking getting "boottime" from the kernel) 443 */ 444 mib[0] = CTL_KERN; 445 mib[1] = KERN_BOOTTIME; 446 size = sizeof(boottime); 447 if (sysctl(mib, 2, &boottime, &size, NULL, 0) != -1 && 448 boottime.tv_sec != 0) { 449 uptime = now - boottime.tv_sec; 450 if (uptime > 60) 451 uptime += 30; 452 days = uptime / 86400; 453 uptime %= 86400; 454 hrs = uptime / 3600; 455 uptime %= 3600; 456 mins = uptime / 60; 457 secs = uptime % 60; 458 (void)printf(" up"); 459 if (days > 0) 460 (void)printf(" %d day%s,", days, days > 1 ? "s" : ""); 461 if (hrs > 0 && mins > 0) 462 (void)printf(" %2d:%02d,", hrs, mins); 463 else if (hrs > 0) 464 (void)printf(" %d hr%s,", hrs, hrs > 1 ? "s" : ""); 465 else if (mins > 0) 466 (void)printf(" %d min%s,", mins, mins > 1 ? "s" : ""); 467 else 468 (void)printf(" %d sec%s,", secs, secs > 1 ? "s" : ""); 469 } 470 471 /* Print number of users logged in to system */ 472 (void)printf(" %d user%s", nusers, nusers == 1 ? "" : "s"); 473 474 /* 475 * Print 1, 5, and 15 minute load averages. 476 */ 477 if (getloadavg(avenrun, sizeof(avenrun) / sizeof(avenrun[0])) == -1) 478 (void)printf(", no load average information available\n"); 479 else { 480 (void)printf(", load averages:"); 481 for (i = 0; i < (sizeof(avenrun) / sizeof(avenrun[0])); i++) { 482 if (use_comma && i > 0) 483 (void)printf(","); 484 (void)printf(" %.2f", avenrun[i]); 485 } 486 (void)printf("\n"); 487 } 488 } 489 490 static struct stat * 491 ttystat(line, sz) 492 char *line; 493 int sz; 494 { 495 static struct stat sb; 496 char ttybuf[MAXPATHLEN]; 497 498 (void)snprintf(ttybuf, sizeof(ttybuf), "%s%.*s", _PATH_DEV, sz, line); 499 if (stat(ttybuf, &sb)) { 500 warn("%s", ttybuf); 501 return (NULL); 502 } 503 return (&sb); 504 } 505 506 static void 507 usage(wcmd) 508 int wcmd; 509 { 510 if (wcmd) 511 (void)fprintf(stderr, 512 "usage: w [-dhin] [-M core] [-N system] [user ...]\n"); 513 else 514 (void)fprintf(stderr, "usage: uptime\n"); 515 exit(1); 516 } 517 518 static int 519 this_is_uptime(s) 520 const char *s; 521 { 522 const char *u; 523 524 if ((u = strrchr(s, '/')) != NULL) 525 ++u; 526 else 527 u = s; 528 if (strcmp(u, "uptime") == 0) 529 return (0); 530 return (-1); 531 } 532