w.c revision 70242
1193640Sariff/*- 2193640Sariff * Copyright (c) 1980, 1991, 1993, 1994 3193640Sariff * The Regents of the University of California. All rights reserved. 4193640Sariff * 5193640Sariff * Redistribution and use in source and binary forms, with or without 6193640Sariff * modification, are permitted provided that the following conditions 7193640Sariff * are met: 8193640Sariff * 1. Redistributions of source code must retain the above copyright 9193640Sariff * notice, this list of conditions and the following disclaimer. 10193640Sariff * 2. Redistributions in binary form must reproduce the above copyright 11193640Sariff * notice, this list of conditions and the following disclaimer in the 12193640Sariff * documentation and/or other materials provided with the distribution. 13193640Sariff * 3. All advertising materials mentioning features or use of this software 14193640Sariff * must display the following acknowledgement: 15193640Sariff * This product includes software developed by the University of 16193640Sariff * California, Berkeley and its contributors. 17193640Sariff * 4. Neither the name of the University nor the names of its contributors 18193640Sariff * may be used to endorse or promote products derived from this software 19193640Sariff * without specific prior written permission. 20193640Sariff * 21193640Sariff * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22193640Sariff * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23193640Sariff * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24193640Sariff * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25193640Sariff * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26193640Sariff * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27193640Sariff * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28193640Sariff * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29193640Sariff * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30193640Sariff * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31193640Sariff * SUCH DAMAGE. 32193640Sariff */ 33193640Sariff 34193640Sariff#ifndef lint 35193640Sariffstatic const char copyright[] = 36193640Sariff"@(#) Copyright (c) 1980, 1991, 1993, 1994\n\ 37193640Sariff The Regents of the University of California. All rights reserved.\n"; 38193640Sariff#endif /* not lint */ 39193640Sariff 40193640Sariff#ifndef lint 41193640Sariff#if 0 42193640Sariffstatic char sccsid[] = "@(#)w.c 8.4 (Berkeley) 4/16/94"; 43193640Sariff#endif 44193640Sariffstatic const char rcsid[] = 45193640Sariff "$FreeBSD: head/usr.bin/w/w.c 70242 2000-12-21 01:30:47Z brian $"; 46193640Sariff#endif /* not lint */ 47193640Sariff 48193640Sariff/* 49193640Sariff * w - print system status (who and what) 50193640Sariff * 51193640Sariff * This program is similar to the systat command on Tenex/Tops 10/20 52193640Sariff * 53193640Sariff */ 54193640Sariff#include <sys/param.h> 55193640Sariff#include <sys/time.h> 56193640Sariff#include <sys/stat.h> 57193640Sariff#include <sys/sysctl.h> 58193640Sariff#include <sys/proc.h> 59193640Sariff#include <sys/user.h> 60193640Sariff#include <sys/ioctl.h> 61193640Sariff#include <sys/socket.h> 62193640Sariff#include <sys/tty.h> 63193640Sariff 64193640Sariff#include <machine/cpu.h> 65193640Sariff#include <netinet/in.h> 66193640Sariff#include <arpa/inet.h> 67193640Sariff 68193640Sariff#include <ctype.h> 69193640Sariff#include <err.h> 70193640Sariff#include <errno.h> 71193640Sariff#include <fcntl.h> 72193640Sariff#include <kvm.h> 73193640Sariff#include <netdb.h> 74193640Sariff#include <nlist.h> 75193640Sariff#include <paths.h> 76193640Sariff#include <stdio.h> 77193640Sariff#include <stdlib.h> 78193640Sariff#include <string.h> 79193640Sariff#include <unistd.h> 80193640Sariff#include <utmp.h> 81193640Sariff#include <vis.h> 82193640Sariff#include <locale.h> 83193640Sariff 84193640Sariff#include <arpa/nameser.h> 85193640Sariff#include <resolv.h> 86193640Sariff 87193640Sariff#include "extern.h" 88193640Sariff 89193640Sariffstruct timeval boottime; 90193640Sariffstruct utmp utmp; 91193640Sariffstruct winsize ws; 92193640Sariffkvm_t *kd; 93193640Sarifftime_t now; /* the current time of day */ 94193640Sarifftime_t uptime; /* time of last reboot & elapsed time since */ 95193640Sariffint ttywidth; /* width of tty */ 96193640Sariffint argwidth; /* width of tty */ 97193640Sariffint header = 1; /* true if -h flag: don't print heading */ 98193640Sariffint nflag; /* true if -n flag: don't convert addrs */ 99193640Sariffint dflag; /* true if -d flag: output debug info */ 100193640Sariffint sortidle; /* sort by idle time */ 101193640Sariffchar **sel_users; /* login array of particular users selected */ 102193640Sariffchar domain[MAXHOSTNAMELEN]; 103193640Sariff 104193640Sariff/* 105193640Sariff * One of these per active utmp entry. 106193640Sariff */ 107193640Sariffstruct entry { 108193640Sariff struct entry *next; 109193640Sariff struct utmp utmp; 110193640Sariff dev_t tdev; /* dev_t of terminal */ 111193640Sariff time_t idle; /* idle time of terminal in seconds */ 112193640Sariff struct kinfo_proc *kp; /* `most interesting' proc */ 113193640Sariff char *args; /* arg list of interesting process */ 114193640Sariff struct kinfo_proc *dkp; /* debug option proc list */ 115193640Sariff} *ep, *ehead = NULL, **nextp = &ehead; 116193640Sariff 117193640Sariff#define debugproc(p) *((struct kinfo_proc **)&(p)->ki_spare[0]) 118193640Sariff 119193640Sariffstatic void pr_header __P((time_t *, int)); 120193640Sariffstatic struct stat *ttystat __P((char *, int)); 121193640Sariffstatic void usage __P((int)); 122193640Sariffstatic int this_is_uptime __P((const char *s)); 123193640Sariff 124193640Sariffchar *fmt_argv __P((char **, char *, int)); /* ../../bin/ps/fmt.c */ 125193640Sariff 126193640Sariffint 127193640Sariffmain(argc, argv) 128193640Sariff int argc; 129193640Sariff char **argv; 130193640Sariff{ 131193640Sariff struct kinfo_proc *kp; 132193640Sariff struct kinfo_proc *dkp; 133193640Sariff struct hostent *hp; 134193640Sariff struct stat *stp; 135193640Sariff FILE *ut; 136193640Sariff u_long l; 137243138Smav time_t touched; 138243138Smav int ch, i, nentries, nusers, wcmd, longidle, dropgid; 139243138Smav char *memf, *nlistf, *p, *x; 140193640Sariff char buf[MAXHOSTNAMELEN], errbuf[256]; 141193640Sariff 142193640Sariff (void)setlocale(LC_ALL, ""); 143243138Smav 144243138Smav /* Are we w(1) or uptime(1)? */ 145193640Sariff if (this_is_uptime(argv[0]) == 0) { 146193640Sariff wcmd = 0; 147193640Sariff p = ""; 148243138Smav } else { 149243138Smav wcmd = 1; 150193640Sariff p = "dhiflM:N:nsuw"; 151193640Sariff } 152243138Smav 153243138Smav dropgid = 0; 154243138Smav memf = nlistf = _PATH_DEVNULL; 155193640Sariff while ((ch = getopt(argc, argv, p)) != -1) 156193640Sariff switch (ch) { 157193640Sariff case 'd': 158243138Smav dflag = 1; 159193640Sariff break; 160193640Sariff case 'h': 161243138Smav header = 0; 162193640Sariff break; 163193640Sariff case 'i': 164193640Sariff sortidle = 1; 165193640Sariff break; 166193640Sariff case 'M': 167193640Sariff header = 0; 168193640Sariff memf = optarg; 169193640Sariff dropgid = 1; 170193640Sariff break; 171193640Sariff case 'N': 172193640Sariff nlistf = optarg; 173193640Sariff dropgid = 1; 174193640Sariff break; 175193640Sariff case 'n': 176193640Sariff nflag = 1; 177193640Sariff break; 178193640Sariff case 'f': case 'l': case 's': case 'u': case 'w': 179193640Sariff warnx("[-flsuw] no longer supported"); 180193640Sariff /* FALLTHROUGH */ 181193640Sariff case '?': 182193640Sariff default: 183193640Sariff usage(wcmd); 184193640Sariff } 185193640Sariff argc -= optind; 186193640Sariff argv += optind; 187193640Sariff 188193640Sariff if (!(_res.options & RES_INIT)) 189193640Sariff res_init(); 190193640Sariff _res.retrans = 2; /* resolver timeout to 2 seconds per try */ 191193640Sariff _res.retry = 1; /* only try once.. */ 192193640Sariff 193193640Sariff /* 194193640Sariff * Discard setgid privileges if not the running kernel so that bad 195193640Sariff * guys can't print interesting stuff from kernel memory. 196193640Sariff */ 197193640Sariff if (dropgid) 198193640Sariff setgid(getgid()); 199193640Sariff 200193640Sariff if ((kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf)) == NULL) 201193640Sariff errx(1, "%s", errbuf); 202193640Sariff 203193640Sariff (void)time(&now); 204193640Sariff if ((ut = fopen(_PATH_UTMP, "r")) == NULL) 205193640Sariff err(1, "%s", _PATH_UTMP); 206193640Sariff 207193640Sariff if (*argv) 208193640Sariff sel_users = argv; 209193640Sariff 210193640Sariff for (nusers = 0; fread(&utmp, sizeof(utmp), 1, ut);) { 211193640Sariff if (utmp.ut_name[0] == '\0') 212193640Sariff continue; 213193640Sariff if (!(stp = ttystat(utmp.ut_line, UT_LINESIZE))) 214193640Sariff continue; /* corrupted record */ 215193640Sariff ++nusers; 216193640Sariff if (wcmd == 0) 217193640Sariff continue; 218193640Sariff if (sel_users) { 219193640Sariff int usermatch; 220193640Sariff char **user; 221 222 usermatch = 0; 223 for (user = sel_users; !usermatch && *user; user++) 224 if (!strncmp(utmp.ut_name, *user, UT_NAMESIZE)) 225 usermatch = 1; 226 if (!usermatch) 227 continue; 228 } 229 if ((ep = calloc(1, sizeof(struct entry))) == NULL) 230 errx(1, "calloc"); 231 *nextp = ep; 232 nextp = &ep->next; 233 memmove(&ep->utmp, &utmp, sizeof(struct utmp)); 234 ep->tdev = stp->st_rdev; 235#ifdef CPU_CONSDEV 236 /* 237 * If this is the console device, attempt to ascertain 238 * the true console device dev_t. 239 */ 240 if (ep->tdev == 0) { 241 int mib[2]; 242 size_t size; 243 244 mib[0] = CTL_MACHDEP; 245 mib[1] = CPU_CONSDEV; 246 size = sizeof(dev_t); 247 (void)sysctl(mib, 2, &ep->tdev, &size, NULL, 0); 248 } 249#endif 250 touched = stp->st_atime; 251 if (touched < ep->utmp.ut_time) { 252 /* tty untouched since before login */ 253 touched = ep->utmp.ut_time; 254 } 255 if ((ep->idle = now - touched) < 0) 256 ep->idle = 0; 257 } 258 (void)fclose(ut); 259 260 if (header || wcmd == 0) { 261 pr_header(&now, nusers); 262 if (wcmd == 0) 263 exit(0); 264 265#define HEADER_USER "USER" 266#define HEADER_TTY "TTY" 267#define HEADER_FROM "FROM" 268#define HEADER_LOGIN_IDLE "LOGIN@ IDLE " 269#define HEADER_WHAT "WHAT\n" 270#define WUSED (UT_NAMESIZE + UT_LINESIZE + UT_HOSTSIZE + \ 271 sizeof(HEADER_LOGIN_IDLE) + 3) /* header width incl. spaces */ 272 (void)printf("%-*.*s %-*.*s %-*.*s %s", 273 UT_NAMESIZE, UT_NAMESIZE, HEADER_USER, 274 UT_LINESIZE, UT_LINESIZE, HEADER_TTY, 275 UT_HOSTSIZE, UT_HOSTSIZE, HEADER_FROM, 276 HEADER_LOGIN_IDLE HEADER_WHAT); 277 } 278 279 if ((kp = kvm_getprocs(kd, KERN_PROC_ALL, 0, &nentries)) == NULL) 280 err(1, "%s", kvm_geterr(kd)); 281 for (i = 0; i < nentries; i++, kp++) { 282 if (kp->ki_stat == SIDL || kp->ki_stat == SZOMB) 283 continue; 284 for (ep = ehead; ep != NULL; ep = ep->next) { 285 if (ep->tdev == kp->ki_tdev) { 286 /* 287 * proc is associated with this terminal 288 */ 289 if (ep->kp == NULL && kp->ki_pgid == kp->ki_tpgid) { 290 /* 291 * Proc is 'most interesting' 292 */ 293 if (proc_compare(ep->kp, kp)) 294 ep->kp = kp; 295 } 296 /* 297 * Proc debug option info; add to debug 298 * list using kinfo_proc ki_spare[0] 299 * as next pointer; ptr to ptr avoids the 300 * ptr = long assumption. 301 */ 302 dkp = ep->dkp; 303 ep->dkp = kp; 304 debugproc(kp) = dkp; 305 } 306 } 307 } 308 if ((ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) == -1 && 309 ioctl(STDERR_FILENO, TIOCGWINSZ, &ws) == -1 && 310 ioctl(STDIN_FILENO, TIOCGWINSZ, &ws) == -1) || ws.ws_col == 0) 311 ttywidth = 79; 312 else 313 ttywidth = ws.ws_col - 1; 314 argwidth = ttywidth - WUSED; 315 if (argwidth < 4) 316 argwidth = 8; 317 for (ep = ehead; ep != NULL; ep = ep->next) { 318 if (ep->kp == NULL) { 319 ep->args = "-"; 320 continue; 321 } 322 ep->args = fmt_argv(kvm_getargv(kd, ep->kp, argwidth), 323 ep->kp->ki_comm, MAXCOMLEN); 324 if (ep->args == NULL) 325 err(1, NULL); 326 } 327 /* sort by idle time */ 328 if (sortidle && ehead != NULL) { 329 struct entry *from, *save; 330 331 from = ehead; 332 ehead = NULL; 333 while (from != NULL) { 334 for (nextp = &ehead; 335 (*nextp) && from->idle >= (*nextp)->idle; 336 nextp = &(*nextp)->next) 337 continue; 338 save = from; 339 from = from->next; 340 save->next = *nextp; 341 *nextp = save; 342 } 343 } 344 345 if (!nflag) { 346 if (gethostname(domain, sizeof(domain) - 1) < 0 || 347 (p = strchr(domain, '.')) == NULL) 348 domain[0] = '\0'; 349 else { 350 domain[sizeof(domain) - 1] = '\0'; 351 memmove(domain, p, strlen(p) + 1); 352 } 353 } 354 355 for (ep = ehead; ep != NULL; ep = ep->next) { 356 char host_buf[UT_HOSTSIZE + 1]; 357 358 host_buf[UT_HOSTSIZE] = '\0'; 359 strncpy(host_buf, ep->utmp.ut_host, UT_HOSTSIZE); 360 p = *host_buf ? host_buf : "-"; 361 if ((x = strchr(p, ':')) != NULL) 362 *x++ = '\0'; 363 if (!nflag && isdigit(*p) && (l = inet_addr(p)) != -1 && 364 (hp = gethostbyaddr((char *)&l, sizeof(l), AF_INET))) { 365 if (domain[0] != '\0') { 366 p = hp->h_name; 367 p += strlen(hp->h_name); 368 p -= strlen(domain); 369 if (p > hp->h_name && strcmp(p, domain) == 0) 370 *p = '\0'; 371 } 372 p = hp->h_name; 373 } 374 if (nflag && *p && strcmp(p, "-") && 375 inet_addr(p) == INADDR_NONE) { 376 hp = gethostbyname(p); 377 378 if (hp != NULL) { 379 struct in_addr in; 380 381 memmove(&in, hp->h_addr, sizeof(in)); 382 p = inet_ntoa(in); 383 } 384 } 385 if (x) { 386 (void)snprintf(buf, sizeof(buf), "%s:%s", p, x); 387 p = buf; 388 } 389 if (dflag) { 390 for (dkp = ep->dkp; dkp != NULL; dkp = debugproc(dkp)) { 391 char *ptr; 392 393 ptr = fmt_argv(kvm_getargv(kd, dkp, argwidth), 394 dkp->ki_comm, MAXCOMLEN); 395 if (ptr == NULL) 396 ptr = "-"; 397 (void)printf("\t\t%-9d %s\n", 398 dkp->ki_pid, ptr); 399 } 400 } 401 (void)printf("%-*.*s %-*.*s %-*.*s ", 402 UT_NAMESIZE, UT_NAMESIZE, ep->utmp.ut_name, 403 UT_LINESIZE, UT_LINESIZE, 404 strncmp(ep->utmp.ut_line, "tty", 3) && 405 strncmp(ep->utmp.ut_line, "cua", 3) ? 406 ep->utmp.ut_line : ep->utmp.ut_line + 3, 407 UT_HOSTSIZE, UT_HOSTSIZE, *p ? p : "-"); 408 pr_attime(&ep->utmp.ut_time, &now); 409 longidle = pr_idle(ep->idle); 410 (void)printf("%.*s\n", argwidth - longidle, ep->args); 411 } 412 exit(0); 413} 414 415static void 416pr_header(nowp, nusers) 417 time_t *nowp; 418 int nusers; 419{ 420 double avenrun[3]; 421 time_t uptime; 422 int days, hrs, i, mins, secs; 423 int mib[2]; 424 size_t size; 425 char buf[256]; 426 427 /* 428 * Print time of day. 429 */ 430 (void)strftime(buf, sizeof(buf) - 1, "%l:%M%p", localtime(nowp)); 431 buf[sizeof(buf) - 1] = '\0'; 432 (void)printf("%s ", buf); 433 434 /* 435 * Print how long system has been up. 436 * (Found by looking getting "boottime" from the kernel) 437 */ 438 mib[0] = CTL_KERN; 439 mib[1] = KERN_BOOTTIME; 440 size = sizeof(boottime); 441 if (sysctl(mib, 2, &boottime, &size, NULL, 0) != -1 && 442 boottime.tv_sec != 0) { 443 uptime = now - boottime.tv_sec; 444 uptime += 30; 445 days = uptime / 86400; 446 uptime %= 86400; 447 hrs = uptime / 3600; 448 uptime %= 3600; 449 mins = uptime / 60; 450 secs = uptime % 60; 451 (void)printf(" up"); 452 if (days > 0) 453 (void)printf(" %d day%s,", days, days > 1 ? "s" : ""); 454 if (hrs > 0 && mins > 0) 455 (void)printf(" %2d:%02d,", hrs, mins); 456 else if (hrs > 0) 457 (void)printf(" %d hr%s,", hrs, hrs > 1 ? "s" : ""); 458 else if (mins > 0) 459 (void)printf(" %d min%s,", mins, mins > 1 ? "s" : ""); 460 else 461 (void)printf(" %d sec%s,", secs, secs > 1 ? "s" : ""); 462 } 463 464 /* Print number of users logged in to system */ 465 (void)printf(" %d user%s", nusers, nusers == 1 ? "" : "s"); 466 467 /* 468 * Print 1, 5, and 15 minute load averages. 469 */ 470 if (getloadavg(avenrun, sizeof(avenrun) / sizeof(avenrun[0])) == -1) 471 (void)printf(", no load average information available\n"); 472 else { 473 (void)printf(", load averages:"); 474 for (i = 0; i < (sizeof(avenrun) / sizeof(avenrun[0])); i++) 475 (void)printf("%s %.2f", i > 0 ? "," : "", avenrun[i]); 476 (void)printf("\n"); 477 } 478} 479 480static struct stat * 481ttystat(line, sz) 482 char *line; 483 int sz; 484{ 485 static struct stat sb; 486 char ttybuf[MAXPATHLEN]; 487 488 (void)snprintf(ttybuf, sizeof(ttybuf), "%s%.*s", _PATH_DEV, sz, line); 489 if (stat(ttybuf, &sb)) { 490 warn("%s", ttybuf); 491 return (NULL); 492 } 493 return (&sb); 494} 495 496static void 497usage(wcmd) 498 int wcmd; 499{ 500 if (wcmd) 501 (void)fprintf(stderr, 502 "usage: w [-dhin] [-M core] [-N system] [user ...]\n"); 503 else 504 (void)fprintf(stderr, "usage: uptime\n"); 505 exit(1); 506} 507 508static int 509this_is_uptime(s) 510 const char *s; 511{ 512 const char *u; 513 514 if ((u = strrchr(s, '/')) != NULL) 515 ++u; 516 else 517 u = s; 518 if (strcmp(u, "uptime") == 0) 519 return (0); 520 return (-1); 521} 522