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 * 4. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30#include <sys/cdefs.h> 31 32__FBSDID("$FreeBSD$"); 33 34#ifndef lint 35static 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 39 40#ifndef lint 41static const char sccsid[] = "@(#)w.c 8.4 (Berkeley) 4/16/94"; 42#endif 43 44/* 45 * w - print system status (who and what) 46 * 47 * This program is similar to the systat command on Tenex/Tops 10/20 48 * 49 */ 50#include <sys/param.h> 51#include <sys/time.h> 52#include <sys/stat.h> 53#include <sys/sysctl.h> 54#include <sys/proc.h> 55#include <sys/user.h> 56#include <sys/ioctl.h> 57#include <sys/socket.h> 58#include <sys/tty.h> 59 60#include <machine/cpu.h> 61#include <netinet/in.h> 62#include <arpa/inet.h> 63#include <arpa/nameser.h> 64 65#include <ctype.h> 66#include <err.h> 67#include <errno.h> 68#include <fcntl.h> 69#include <kvm.h> 70#include <langinfo.h> 71#include <libutil.h> 72#include <limits.h> 73#include <locale.h> 74#include <netdb.h> 75#include <nlist.h> 76#include <paths.h> 77#include <resolv.h> 78#include <stdio.h> 79#include <stdlib.h> 80#include <string.h> 81#include <timeconv.h> 82#include <unistd.h> 83#include <utmpx.h> 84#include <vis.h> 85 86#include "extern.h" 87 88static struct utmpx *utmp; 89static struct winsize ws; 90static kvm_t *kd; 91static time_t now; /* the current time of day */ 92static int ttywidth; /* width of tty */ 93static int argwidth; /* width of tty */ 94static int header = 1; /* true if -h flag: don't print heading */ 95static int nflag; /* true if -n flag: don't convert addrs */ 96static int dflag; /* true if -d flag: output debug info */ 97static int sortidle; /* sort by idle time */ 98int use_ampm; /* use AM/PM time */ 99static int use_comma; /* use comma as floats separator */ 100static char **sel_users; /* login array of particular users selected */ 101 102/* 103 * One of these per active utmp entry. 104 */ 105static struct entry { 106 struct entry *next; 107 struct utmpx utmp; 108 dev_t tdev; /* dev_t of terminal */ 109 time_t idle; /* idle time of terminal in seconds */ 110 struct kinfo_proc *kp; /* `most interesting' proc */ 111 char *args; /* arg list of interesting process */ 112 struct kinfo_proc *dkp; /* debug option proc list */ 113} *ep, *ehead = NULL, **nextp = &ehead; 114 115#define debugproc(p) *(&((struct kinfo_proc *)p)->ki_udata) 116 117#define W_DISPUSERSIZE 10 118#define W_DISPLINESIZE 8 119#define W_DISPHOSTSIZE 24 120 121static void pr_header(time_t *, int); 122static struct stat *ttystat(char *); 123static void usage(int); 124static int this_is_uptime(const char *s); 125 126char *fmt_argv(char **, char *, char *, size_t); /* ../../bin/ps/fmt.c */ 127 128int 129main(int argc, char *argv[]) 130{ 131 struct kinfo_proc *kp; 132 struct kinfo_proc *dkp; 133 struct stat *stp; 134 time_t touched; 135 int ch, i, nentries, nusers, wcmd, longidle, longattime; 136 const char *memf, *nlistf, *p; 137 char *x_suffix; 138 char buf[MAXHOSTNAMELEN], errbuf[_POSIX2_LINE_MAX]; 139 char fn[MAXHOSTNAMELEN]; 140 char *dot; 141 142 (void)setlocale(LC_ALL, ""); 143 use_ampm = (*nl_langinfo(T_FMT_AMPM) != '\0'); 144 use_comma = (*nl_langinfo(RADIXCHAR) != ','); 145 146 /* Are we w(1) or uptime(1)? */ 147 if (this_is_uptime(argv[0]) == 0) { 148 wcmd = 0; 149 p = ""; 150 } else { 151 wcmd = 1; 152 p = "dhiflM:N:nsuw"; 153 } 154 155 memf = _PATH_DEVNULL; 156 nlistf = NULL; 157 while ((ch = getopt(argc, argv, p)) != -1) 158 switch (ch) { 159 case 'd': 160 dflag = 1; 161 break; 162 case 'h': 163 header = 0; 164 break; 165 case 'i': 166 sortidle = 1; 167 break; 168 case 'M': 169 header = 0; 170 memf = optarg; 171 break; 172 case 'N': 173 nlistf = optarg; 174 break; 175 case 'n': 176 nflag = 1; 177 break; 178 case 'f': case 'l': case 's': case 'u': case 'w': 179 warnx("[-flsuw] no longer supported"); 180 /* FALLTHROUGH */ 181 case '?': 182 default: 183 usage(wcmd); 184 } 185 argc -= optind; 186 argv += optind; 187 188 if (!(_res.options & RES_INIT)) 189 res_init(); 190 _res.retrans = 2; /* resolver timeout to 2 seconds per try */ 191 _res.retry = 1; /* only try once.. */ 192 193 if ((kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf)) == NULL) 194 errx(1, "%s", errbuf); 195 196 (void)time(&now); 197 198 if (*argv) 199 sel_users = argv; 200 201 setutxent(); 202 for (nusers = 0; (utmp = getutxent()) != NULL;) { 203 if (utmp->ut_type != USER_PROCESS) 204 continue; 205 if (!(stp = ttystat(utmp->ut_line))) 206 continue; /* corrupted record */ 207 ++nusers; 208 if (wcmd == 0) 209 continue; 210 if (sel_users) { 211 int usermatch; 212 char **user; 213 214 usermatch = 0; 215 for (user = sel_users; !usermatch && *user; user++) 216 if (!strcmp(utmp->ut_user, *user)) 217 usermatch = 1; 218 if (!usermatch) 219 continue; 220 } 221 if ((ep = calloc(1, sizeof(struct entry))) == NULL) 222 errx(1, "calloc"); 223 *nextp = ep; 224 nextp = &ep->next; 225 memmove(&ep->utmp, utmp, sizeof *utmp); 226 ep->tdev = stp->st_rdev; 227 /* 228 * If this is the console device, attempt to ascertain 229 * the true console device dev_t. 230 */ 231 if (ep->tdev == 0) { 232 size_t size; 233 234 size = sizeof(dev_t); 235 (void)sysctlbyname("machdep.consdev", &ep->tdev, &size, NULL, 0); 236 } 237 touched = stp->st_atime; 238 if (touched < ep->utmp.ut_tv.tv_sec) { 239 /* tty untouched since before login */ 240 touched = ep->utmp.ut_tv.tv_sec; 241 } 242 if ((ep->idle = now - touched) < 0) 243 ep->idle = 0; 244 } 245 endutxent(); 246 247 if (header || wcmd == 0) { 248 pr_header(&now, nusers); 249 if (wcmd == 0) { 250 (void)kvm_close(kd); 251 exit(0); 252 } 253 254#define HEADER_USER "USER" 255#define HEADER_TTY "TTY" 256#define HEADER_FROM "FROM" 257#define HEADER_LOGIN_IDLE "LOGIN@ IDLE " 258#define HEADER_WHAT "WHAT\n" 259#define WUSED (W_DISPUSERSIZE + W_DISPLINESIZE + W_DISPHOSTSIZE + \ 260 sizeof(HEADER_LOGIN_IDLE) + 3) /* header width incl. spaces */ 261 (void)printf("%-*.*s %-*.*s %-*.*s %s", 262 W_DISPUSERSIZE, W_DISPUSERSIZE, HEADER_USER, 263 W_DISPLINESIZE, W_DISPLINESIZE, HEADER_TTY, 264 W_DISPHOSTSIZE, W_DISPHOSTSIZE, HEADER_FROM, 265 HEADER_LOGIN_IDLE HEADER_WHAT); 266 } 267 268 if ((kp = kvm_getprocs(kd, KERN_PROC_ALL, 0, &nentries)) == NULL) 269 err(1, "%s", kvm_geterr(kd)); 270 for (i = 0; i < nentries; i++, kp++) { 271 if (kp->ki_stat == SIDL || kp->ki_stat == SZOMB || 272 kp->ki_tdev == NODEV) 273 continue; 274 for (ep = ehead; ep != NULL; ep = ep->next) { 275 if (ep->tdev == kp->ki_tdev) { 276 /* 277 * proc is associated with this terminal 278 */ 279 if (ep->kp == NULL && kp->ki_pgid == kp->ki_tpgid) { 280 /* 281 * Proc is 'most interesting' 282 */ 283 if (proc_compare(ep->kp, kp)) 284 ep->kp = kp; 285 } 286 /* 287 * Proc debug option info; add to debug 288 * list using kinfo_proc ki_spare[0] 289 * as next pointer; ptr to ptr avoids the 290 * ptr = long assumption. 291 */ 292 dkp = ep->dkp; 293 ep->dkp = kp; 294 debugproc(kp) = dkp; 295 } 296 } 297 } 298 if ((ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) == -1 && 299 ioctl(STDERR_FILENO, TIOCGWINSZ, &ws) == -1 && 300 ioctl(STDIN_FILENO, TIOCGWINSZ, &ws) == -1) || ws.ws_col == 0) 301 ttywidth = 79; 302 else 303 ttywidth = ws.ws_col - 1; 304 argwidth = ttywidth - WUSED; 305 if (argwidth < 4) 306 argwidth = 8; 307 for (ep = ehead; ep != NULL; ep = ep->next) { 308 if (ep->kp == NULL) { 309 ep->args = strdup("-"); 310 continue; 311 } 312 ep->args = fmt_argv(kvm_getargv(kd, ep->kp, argwidth), 313 ep->kp->ki_comm, NULL, MAXCOMLEN); 314 if (ep->args == NULL) 315 err(1, NULL); 316 } 317 /* sort by idle time */ 318 if (sortidle && ehead != NULL) { 319 struct entry *from, *save; 320 321 from = ehead; 322 ehead = NULL; 323 while (from != NULL) { 324 for (nextp = &ehead; 325 (*nextp) && from->idle >= (*nextp)->idle; 326 nextp = &(*nextp)->next) 327 continue; 328 save = from; 329 from = from->next; 330 save->next = *nextp; 331 *nextp = save; 332 } 333 } 334 335 for (ep = ehead; ep != NULL; ep = ep->next) { 336 struct addrinfo hints, *res; 337 struct sockaddr_storage ss; 338 struct sockaddr *sa = (struct sockaddr *)&ss; 339 struct sockaddr_in *lsin = (struct sockaddr_in *)&ss; 340 struct sockaddr_in6 *lsin6 = (struct sockaddr_in6 *)&ss; 341 time_t t; 342 int isaddr; 343 344 p = *ep->utmp.ut_host ? ep->utmp.ut_host : "-"; 345 if ((x_suffix = strrchr(p, ':')) != NULL) { 346 if ((dot = strchr(x_suffix, '.')) != NULL && 347 strchr(dot+1, '.') == NULL) 348 *x_suffix++ = '\0'; 349 else 350 x_suffix = NULL; 351 } 352 353 isaddr = 0; 354 memset(&ss, '\0', sizeof(ss)); 355 if (inet_pton(AF_INET6, p, &lsin6->sin6_addr) == 1) { 356 lsin6->sin6_len = sizeof(*lsin6); 357 lsin6->sin6_family = AF_INET6; 358 isaddr = 1; 359 } else if (inet_pton(AF_INET, p, &lsin->sin_addr) == 1) { 360 lsin->sin_len = sizeof(*lsin); 361 lsin->sin_family = AF_INET; 362 isaddr = 1; 363 } 364 if (!nflag) { 365 /* Attempt to change an IP address into a name */ 366 if (isaddr && realhostname_sa(fn, sizeof(fn), sa, 367 sa->sa_len) == HOSTNAME_FOUND) 368 p = fn; 369 } else if (!isaddr) { 370 /* 371 * If a host has only one A/AAAA RR, change a 372 * name into an IP address 373 */ 374 memset(&hints, 0, sizeof(hints)); 375 hints.ai_flags = AI_PASSIVE; 376 hints.ai_family = AF_UNSPEC; 377 hints.ai_socktype = SOCK_STREAM; 378 if (getaddrinfo(p, NULL, &hints, &res) == 0) { 379 if (res->ai_next == NULL && 380 getnameinfo(res->ai_addr, res->ai_addrlen, 381 fn, sizeof(fn), NULL, 0, 382 NI_NUMERICHOST) == 0) 383 p = fn; 384 freeaddrinfo(res); 385 } 386 } 387 388 if (x_suffix) { 389 (void)snprintf(buf, sizeof(buf), "%s:%s", p, x_suffix); 390 p = buf; 391 } 392 if (dflag) { 393 for (dkp = ep->dkp; dkp != NULL; dkp = debugproc(dkp)) { 394 const char *ptr; 395 396 ptr = fmt_argv(kvm_getargv(kd, dkp, argwidth), 397 dkp->ki_comm, NULL, MAXCOMLEN); 398 if (ptr == NULL) 399 ptr = "-"; 400 (void)printf("\t\t%-9d %s\n", 401 dkp->ki_pid, ptr); 402 } 403 } 404 (void)printf("%-*.*s %-*.*s %-*.*s ", 405 W_DISPUSERSIZE, W_DISPUSERSIZE, ep->utmp.ut_user, 406 W_DISPLINESIZE, W_DISPLINESIZE, 407 *ep->utmp.ut_line ? 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 W_DISPHOSTSIZE, W_DISPHOSTSIZE, *p ? p : "-"); 412 t = ep->utmp.ut_tv.tv_sec; 413 longattime = pr_attime(&t, &now); 414 longidle = pr_idle(ep->idle); 415 (void)printf("%.*s\n", argwidth - longidle - longattime, 416 ep->args); 417 } 418 (void)kvm_close(kd); 419 exit(0); 420} 421 422static void 423pr_header(time_t *nowp, int nusers) 424{ 425 double avenrun[3]; 426 time_t uptime; 427 struct timespec tp; 428 int days, hrs, i, mins, secs; 429 char buf[256]; 430 431 /* 432 * Print time of day. 433 */ 434 if (strftime(buf, sizeof(buf), 435 use_ampm ? "%l:%M%p" : "%k:%M", localtime(nowp)) != 0) 436 (void)printf("%s ", buf); 437 /* 438 * Print how long system has been up. 439 */ 440 if (clock_gettime(CLOCK_UPTIME, &tp) != -1) { 441 uptime = tp.tv_sec; 442 if (uptime > 60) 443 uptime += 30; 444 days = uptime / 86400; 445 uptime %= 86400; 446 hrs = uptime / 3600; 447 uptime %= 3600; 448 mins = uptime / 60; 449 secs = uptime % 60; 450 (void)printf(" up"); 451 if (days > 0) 452 (void)printf(" %d day%s,", days, days > 1 ? "s" : ""); 453 if (hrs > 0 && mins > 0) 454 (void)printf(" %2d:%02d,", hrs, mins); 455 else if (hrs > 0) 456 (void)printf(" %d hr%s,", hrs, hrs > 1 ? "s" : ""); 457 else if (mins > 0) 458 (void)printf(" %d min%s,", mins, mins > 1 ? "s" : ""); 459 else 460 (void)printf(" %d sec%s,", secs, secs > 1 ? "s" : ""); 461 } 462 463 /* Print number of users logged in to system */ 464 (void)printf(" %d user%s", nusers, nusers == 1 ? "" : "s"); 465 466 /* 467 * Print 1, 5, and 15 minute load averages. 468 */ 469 if (getloadavg(avenrun, sizeof(avenrun) / sizeof(avenrun[0])) == -1) 470 (void)printf(", no load average information available\n"); 471 else { 472 (void)printf(", load averages:"); 473 for (i = 0; i < (int)(sizeof(avenrun) / sizeof(avenrun[0])); i++) { 474 if (use_comma && i > 0) 475 (void)printf(","); 476 (void)printf(" %.2f", avenrun[i]); 477 } 478 (void)printf("\n"); 479 } 480} 481 482static struct stat * 483ttystat(char *line) 484{ 485 static struct stat sb; 486 char ttybuf[MAXPATHLEN]; 487 488 (void)snprintf(ttybuf, sizeof(ttybuf), "%s%s", _PATH_DEV, line); 489 if (stat(ttybuf, &sb) == 0 && S_ISCHR(sb.st_mode)) { 490 return (&sb); 491 } else 492 return (NULL); 493} 494 495static void 496usage(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 506static int 507this_is_uptime(const char *s) 508{ 509 const char *u; 510 511 if ((u = strrchr(s, '/')) != NULL) 512 ++u; 513 else 514 u = s; 515 if (strcmp(u, "uptime") == 0) 516 return (0); 517 return (-1); 518} 519