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 1.4 2003/10/04 20:36:54 hmp 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(time_t *, int); 115 static struct stat *ttystat(char *, int); 116 static void usage(int); 117 static int this_is_uptime(const char *s); 118 119 char *fmt_argv(char **, char *, int); /* ../../bin/ps/fmt.c */ 120 121 int 122 main(int argc, char **argv) 123 { 124 struct kinfo_proc *kp; 125 struct kinfo_proc *dkp; 126 struct hostent *hp; 127 struct stat *stp; 128 FILE *ut; 129 in_addr_t l; 130 time_t touched; 131 int ch, i, nentries, nusers, wcmd, longidle, dropgid; 132 char *memf, *nlistf, *p, *x; 133 char buf[MAXHOSTNAMELEN], errbuf[_POSIX2_LINE_MAX]; 134 135 (void)setlocale(LC_ALL, ""); 136 use_ampm = (*nl_langinfo(T_FMT_AMPM) != '\0'); 137 use_comma = (*nl_langinfo(RADIXCHAR) != ','); 138 139 /* Are we w(1) or uptime(1)? */ 140 if (this_is_uptime(argv[0]) == 0) { 141 wcmd = 0; 142 p = ""; 143 } else { 144 wcmd = 1; 145 p = "dhiflM:N:nsuw"; 146 } 147 148 dropgid = 0; 149 memf = nlistf = _PATH_DEVNULL; 150 while ((ch = getopt(argc, argv, p)) != -1) 151 switch (ch) { 152 case 'd': 153 dflag = 1; 154 break; 155 case 'h': 156 header = 0; 157 break; 158 case 'i': 159 sortidle = 1; 160 break; 161 case 'M': 162 header = 0; 163 memf = optarg; 164 dropgid = 1; 165 break; 166 case 'N': 167 nlistf = optarg; 168 dropgid = 1; 169 break; 170 case 'n': 171 nflag = 1; 172 break; 173 case 'f': case 'l': case 's': case 'u': case 'w': 174 warnx("[-flsuw] no longer supported"); 175 /* FALLTHROUGH */ 176 case '?': 177 default: 178 usage(wcmd); 179 } 180 argc -= optind; 181 argv += optind; 182 183 if (!(_res.options & RES_INIT)) 184 res_init(); 185 _res.retrans = 2; /* resolver timeout to 2 seconds per try */ 186 _res.retry = 1; /* only try once.. */ 187 188 /* 189 * Discard setgid privileges if not the running kernel so that bad 190 * guys can't print interesting stuff from kernel memory. 191 */ 192 if (dropgid) 193 setgid(getgid()); 194 195 if ((kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf)) == NULL) 196 errx(1, "%s", errbuf); 197 198 (void)time(&now); 199 if ((ut = fopen(_PATH_UTMP, "r")) == NULL) 200 err(1, "%s", _PATH_UTMP); 201 202 if (*argv) 203 sel_users = argv; 204 205 for (nusers = 0; fread(&utmp, sizeof(utmp), 1, ut);) { 206 if (utmp.ut_name[0] == '\0') 207 continue; 208 if (!(stp = ttystat(utmp.ut_line, UT_LINESIZE))) 209 continue; /* corrupted record */ 210 ++nusers; 211 if (wcmd == 0) 212 continue; 213 if (sel_users) { 214 int usermatch; 215 char **user; 216 217 usermatch = 0; 218 for (user = sel_users; !usermatch && *user; user++) 219 if (!strncmp(utmp.ut_name, *user, UT_NAMESIZE)) 220 usermatch = 1; 221 if (!usermatch) 222 continue; 223 } 224 if ((ep = calloc(1, sizeof(struct entry))) == NULL) 225 errx(1, "calloc"); 226 *nextp = ep; 227 nextp = &ep->next; 228 memmove(&ep->utmp, &utmp, sizeof(struct utmp)); 229 ep->tdev = stp->st_rdev; 230 #ifdef CPU_CONSDEV 231 /* 232 * If this is the console device, attempt to ascertain 233 * the true console device dev_t. 234 */ 235 if (ep->tdev == 0) { 236 int mib[2]; 237 size_t size; 238 239 mib[0] = CTL_MACHDEP; 240 mib[1] = CPU_CONSDEV; 241 size = sizeof(dev_t); 242 (void)sysctl(mib, 2, &ep->tdev, &size, NULL, 0); 243 } 244 #endif 245 touched = stp->st_atime; 246 if (touched < ep->utmp.ut_time) { 247 /* tty untouched since before login */ 248 touched = ep->utmp.ut_time; 249 } 250 if ((ep->idle = now - touched) < 0) 251 ep->idle = 0; 252 } 253 (void)fclose(ut); 254 255 if (header || wcmd == 0) { 256 pr_header(&now, nusers); 257 if (wcmd == 0) { 258 (void)kvm_close(kd); 259 exit(0); 260 } 261 262 #define HEADER_USER "USER" 263 #define HEADER_TTY "TTY" 264 #define HEADER_FROM "FROM" 265 #define HEADER_LOGIN_IDLE "LOGIN@ IDLE " 266 #define HEADER_WHAT "WHAT\n" 267 #define WUSED (UT_NAMESIZE + UT_LINESIZE + UT_HOSTSIZE + \ 268 sizeof(HEADER_LOGIN_IDLE) + 3) /* header width incl. spaces */ 269 (void)printf("%-*.*s %-*.*s %-*.*s %s", 270 UT_NAMESIZE, UT_NAMESIZE, HEADER_USER, 271 UT_LINESIZE, UT_LINESIZE, HEADER_TTY, 272 UT_HOSTSIZE, UT_HOSTSIZE, HEADER_FROM, 273 HEADER_LOGIN_IDLE HEADER_WHAT); 274 } 275 276 if ((kp = kvm_getprocs(kd, KERN_PROC_ALL, 0, &nentries)) == NULL) 277 err(1, "%s", kvm_geterr(kd)); 278 for (i = 0; i < nentries; i++, kp++) { 279 struct proc *pr = &kp->kp_proc; 280 struct eproc *e; 281 282 if (pr->p_stat == SIDL || pr->p_stat == SZOMB) 283 continue; 284 e = &kp->kp_eproc; 285 for (ep = ehead; ep != NULL; ep = ep->next) { 286 if (ep->tdev == e->e_tdev) { 287 /* 288 * proc is associated with this terminal 289 */ 290 if (ep->kp == NULL && e->e_pgid == e->e_tpgid) { 291 /* 292 * Proc is 'most interesting' 293 */ 294 if (proc_compare(&ep->kp->kp_proc, pr)) 295 ep->kp = kp; 296 } 297 /* 298 * Proc debug option info; add to debug 299 * list using kinfo_proc kp_eproc.e_spare 300 * as next pointer; ptr to ptr avoids the 301 * ptr = long assumption. 302 */ 303 dkp = ep->dkp; 304 ep->dkp = kp; 305 debugproc(kp) = dkp; 306 } 307 } 308 } 309 if ((ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) == -1 && 310 ioctl(STDERR_FILENO, TIOCGWINSZ, &ws) == -1 && 311 ioctl(STDIN_FILENO, TIOCGWINSZ, &ws) == -1) || ws.ws_col == 0) 312 ttywidth = 79; 313 else 314 ttywidth = ws.ws_col - 1; 315 argwidth = ttywidth - WUSED; 316 if (argwidth < 4) 317 argwidth = 8; 318 for (ep = ehead; ep != NULL; ep = ep->next) { 319 if (ep->kp == NULL) { 320 ep->args = "-"; 321 continue; 322 } 323 ep->args = fmt_argv(kvm_getargv(kd, ep->kp, argwidth), 324 ep->kp->kp_thread.td_comm, MAXCOMLEN); 325 if (ep->args == NULL) 326 err(1, NULL); 327 } 328 /* sort by idle time */ 329 if (sortidle && ehead != NULL) { 330 struct entry *from, *save; 331 332 from = ehead; 333 ehead = NULL; 334 while (from != NULL) { 335 for (nextp = &ehead; 336 (*nextp) && from->idle >= (*nextp)->idle; 337 nextp = &(*nextp)->next) 338 continue; 339 save = from; 340 from = from->next; 341 save->next = *nextp; 342 *nextp = save; 343 } 344 } 345 346 if (!nflag) { 347 if (gethostname(domain, sizeof(domain) - 1) < 0 || 348 (p = strchr(domain, '.')) == NULL) 349 domain[0] = '\0'; 350 else { 351 domain[sizeof(domain) - 1] = '\0'; 352 memmove(domain, p, strlen(p) + 1); 353 } 354 } 355 356 for (ep = ehead; ep != NULL; ep = ep->next) { 357 char host_buf[UT_HOSTSIZE + 1]; 358 359 host_buf[UT_HOSTSIZE] = '\0'; 360 strncpy(host_buf, ep->utmp.ut_host, UT_HOSTSIZE); 361 p = *host_buf ? host_buf : "-"; 362 if ((x = strchr(p, ':')) != NULL) 363 *x++ = '\0'; 364 if (!nflag && isdigit(*p) && (l = inet_addr(p)) != -1 && 365 (hp = gethostbyaddr((char *)&l, sizeof(l), AF_INET))) { 366 if (domain[0] != '\0') { 367 p = hp->h_name; 368 p += strlen(hp->h_name); 369 p -= strlen(domain); 370 if (p > hp->h_name && 371 strcasecmp(p, domain) == 0) 372 *p = '\0'; 373 } 374 p = hp->h_name; 375 } 376 if (nflag && *p && strcmp(p, "-") && 377 inet_addr(p) == INADDR_NONE) { 378 hp = gethostbyname(p); 379 380 if (hp != NULL) { 381 struct in_addr in; 382 383 memmove(&in, hp->h_addr, sizeof(in)); 384 p = inet_ntoa(in); 385 } 386 } 387 if (x) { 388 (void)snprintf(buf, sizeof(buf), "%s:%s", p, x); 389 p = buf; 390 } 391 if (dflag) { 392 for (dkp = ep->dkp; dkp != NULL; dkp = debugproc(dkp)) { 393 char *ptr; 394 395 ptr = fmt_argv(kvm_getargv(kd, dkp, argwidth), 396 dkp->kp_thread.td_comm, MAXCOMLEN); 397 if (ptr == NULL) 398 ptr = "-"; 399 (void)printf("\t\t%-9d %s\n", 400 dkp->kp_proc.p_pid, ptr); 401 } 402 } 403 (void)printf("%-*.*s %-*.*s %-*.*s ", 404 UT_NAMESIZE, UT_NAMESIZE, ep->utmp.ut_name, 405 UT_LINESIZE, UT_LINESIZE, 406 strncmp(ep->utmp.ut_line, "tty", 3) && 407 strncmp(ep->utmp.ut_line, "cua", 3) ? 408 ep->utmp.ut_line : ep->utmp.ut_line + 3, 409 UT_HOSTSIZE, UT_HOSTSIZE, *p ? p : "-"); 410 pr_attime(&ep->utmp.ut_time, &now); 411 longidle = pr_idle(ep->idle); 412 (void)printf("%.*s\n", argwidth - longidle, ep->args); 413 } 414 (void)kvm_close(kd); 415 exit(0); 416 } 417 418 static void 419 pr_header(time_t *nowp, int nusers) 420 { 421 double avenrun[3]; 422 time_t uptime; 423 int days, hrs, i, mins, secs; 424 int mib[2]; 425 size_t size; 426 char buf[256]; 427 428 /* 429 * Print time of day. 430 */ 431 (void)strftime(buf, sizeof(buf) - 1, 432 use_ampm ? "%l:%M%p" : "%k:%M", localtime(nowp)); 433 buf[sizeof(buf) - 1] = '\0'; 434 (void)printf("%s ", buf); 435 436 /* 437 * Print how long system has been up. 438 * (Found by looking getting "boottime" from the kernel) 439 */ 440 mib[0] = CTL_KERN; 441 mib[1] = KERN_BOOTTIME; 442 size = sizeof(boottime); 443 if (sysctl(mib, 2, &boottime, &size, NULL, 0) != -1 && 444 boottime.tv_sec != 0) { 445 uptime = now - boottime.tv_sec; 446 if (uptime > 60) 447 uptime += 30; 448 days = uptime / 86400; 449 uptime %= 86400; 450 hrs = uptime / 3600; 451 uptime %= 3600; 452 mins = uptime / 60; 453 secs = uptime % 60; 454 (void)printf(" up"); 455 if (days > 0) 456 (void)printf(" %d day%s,", days, days > 1 ? "s" : ""); 457 if (hrs > 0 && mins > 0) 458 (void)printf(" %2d:%02d,", hrs, mins); 459 else if (hrs > 0) 460 (void)printf(" %d hr%s,", hrs, hrs > 1 ? "s" : ""); 461 else if (mins > 0) 462 (void)printf(" %d min%s,", mins, mins > 1 ? "s" : ""); 463 else 464 (void)printf(" %d sec%s,", secs, secs > 1 ? "s" : ""); 465 } 466 467 /* Print number of users logged in to system */ 468 (void)printf(" %d user%s", nusers, nusers == 1 ? "" : "s"); 469 470 /* 471 * Print 1, 5, and 15 minute load averages. 472 */ 473 if (getloadavg(avenrun, sizeof(avenrun) / sizeof(avenrun[0])) == -1) 474 (void)printf(", no load average information available\n"); 475 else { 476 (void)printf(", load averages:"); 477 for (i = 0; i < (sizeof(avenrun) / sizeof(avenrun[0])); i++) { 478 if (use_comma && i > 0) 479 (void)printf(","); 480 (void)printf(" %.2f", avenrun[i]); 481 } 482 (void)printf("\n"); 483 } 484 } 485 486 static struct stat * 487 ttystat(char *line, int sz) 488 { 489 static struct stat sb; 490 char ttybuf[MAXPATHLEN]; 491 492 (void)snprintf(ttybuf, sizeof(ttybuf), "%s%.*s", _PATH_DEV, sz, line); 493 if (stat(ttybuf, &sb)) { 494 warn("%s", ttybuf); 495 return (NULL); 496 } 497 return (&sb); 498 } 499 500 static void 501 usage(int wcmd) 502 { 503 if (wcmd) 504 (void)fprintf(stderr, 505 "usage: w [-dhin] [-M core] [-N system] [user ...]\n"); 506 else 507 (void)fprintf(stderr, "usage: uptime\n"); 508 exit(1); 509 } 510 511 static int 512 this_is_uptime(const char *s) 513 { 514 const char *u; 515 516 if ((u = strrchr(s, '/')) != NULL) 517 ++u; 518 else 519 u = s; 520 if (strcmp(u, "uptime") == 0) 521 return (0); 522 return (-1); 523 } 524