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