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