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 "$Id: w.c,v 1.31 1998/12/24 23:27:33 dillon Exp $"; 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_user; /* login of particular user 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 static void pr_header __P((time_t *, int)); 118 static struct stat 119 *ttystat __P((char *)); 120 static void usage __P((int)); 121 static int this_is_uptime __P((const char *s)); 122 123 char *fmt_argv __P((char **, char *, int)); /* ../../bin/ps/fmt.c */ 124 125 int 126 main(argc, argv) 127 int argc; 128 char **argv; 129 { 130 extern char *__progname; 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 size_t arglen; 138 int ch, i, nentries, nusers, wcmd, longidle; 139 char *memf, *nlistf, *p, *x; 140 char buf[MAXHOSTNAMELEN], errbuf[256]; 141 142 (void) setlocale(LC_ALL, ""); 143 144 /* Are we w(1) or uptime(1)? */ 145 if (this_is_uptime(argv[0]) == 0) { 146 wcmd = 0; 147 p = ""; 148 } else { 149 wcmd = 1; 150 p = "dhiflM:N:nsuw"; 151 } 152 153 memf = nlistf = NULL; 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 break; 169 case 'N': 170 nlistf = optarg; 171 break; 172 case 'n': 173 nflag = 1; 174 break; 175 case 'f': case 'l': case 's': case 'u': case 'w': 176 warnx("[-flsuw] no longer supported"); 177 /* FALLTHROUGH */ 178 case '?': 179 default: 180 usage(wcmd); 181 } 182 argc -= optind; 183 argv += optind; 184 185 if (!(_res.options & RES_INIT)) 186 res_init(); 187 _res.retrans = 2; /* resolver timeout to 2 seconds per try */ 188 _res.retry = 1; /* only try once.. */ 189 190 /* 191 * Discard setgid privileges if not the running kernel so that bad 192 * guys can't print interesting stuff from kernel memory. 193 */ 194 if (nlistf != NULL || memf != NULL) 195 setgid(getgid()); 196 197 if ((kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf)) == NULL) 198 errx(1, "%s", errbuf); 199 200 (void)time(&now); 201 if ((ut = fopen(_PATH_UTMP, "r")) == NULL) 202 err(1, "%s", _PATH_UTMP); 203 204 if (*argv) 205 sel_user = *argv; 206 207 for (nusers = 0; fread(&utmp, sizeof(utmp), 1, ut);) { 208 if (utmp.ut_name[0] == '\0') 209 continue; 210 if (!(stp = ttystat(utmp.ut_line))) /* corrupted record */ 211 continue; 212 ++nusers; 213 if (wcmd == 0 || (sel_user && 214 strncmp(utmp.ut_name, sel_user, UT_NAMESIZE) != 0)) 215 continue; 216 if ((ep = calloc(1, sizeof(struct entry))) == NULL) 217 errx(1, "calloc"); 218 *nextp = ep; 219 nextp = &(ep->next); 220 memmove(&(ep->utmp), &utmp, sizeof(struct utmp)); 221 ep->tdev = stp->st_rdev; 222 #ifdef CPU_CONSDEV 223 /* 224 * If this is the console device, attempt to ascertain 225 * the true console device dev_t. 226 */ 227 if (ep->tdev == 0) { 228 int mib[2]; 229 size_t size; 230 231 mib[0] = CTL_MACHDEP; 232 mib[1] = CPU_CONSDEV; 233 size = sizeof(dev_t); 234 (void) sysctl(mib, 2, &ep->tdev, &size, NULL, 0); 235 } 236 #endif 237 if ((ep->idle = now - stp->st_atime) < 0) 238 ep->idle = 0; 239 } 240 (void)fclose(ut); 241 242 if (header || wcmd == 0) { 243 pr_header(&now, nusers); 244 if (wcmd == 0) 245 exit (0); 246 247 #define HEADER_USER "USER" 248 #define HEADER_TTY "TTY" 249 #define HEADER_FROM "FROM" 250 #define HEADER_LOGIN_IDLE "LOGIN@ IDLE " 251 #define HEADER_WHAT "WHAT\n" 252 #define WUSED (UT_NAMESIZE + UT_LINESIZE + UT_HOSTSIZE + \ 253 sizeof(HEADER_LOGIN_IDLE) + 3) /* header width incl. spaces */ 254 (void)printf("%-*.*s %-*.*s %-*.*s %s", 255 UT_NAMESIZE, UT_NAMESIZE, HEADER_USER, 256 UT_LINESIZE, UT_LINESIZE, HEADER_TTY, 257 UT_HOSTSIZE, UT_HOSTSIZE, HEADER_FROM, 258 HEADER_LOGIN_IDLE HEADER_WHAT); 259 } 260 261 if ((kp = kvm_getprocs(kd, KERN_PROC_ALL, 0, &nentries)) == NULL) 262 err(1, "%s", kvm_geterr(kd)); 263 for (i = 0; i < nentries; i++, kp++) { 264 struct proc *p = &kp->kp_proc; 265 struct eproc *e; 266 267 if (p->p_stat == SIDL || p->p_stat == SZOMB) 268 continue; 269 e = &kp->kp_eproc; 270 for (ep = ehead; ep != NULL; ep = ep->next) { 271 if (ep->tdev == e->e_tdev) { 272 /* 273 * proc is associated with this terminal 274 */ 275 if (ep->kp == NULL && e->e_pgid == e->e_tpgid) { 276 /* 277 * Proc is 'most interesting' 278 */ 279 if (proc_compare(&ep->kp->kp_proc, p)) 280 ep->kp = kp; 281 } 282 /* 283 * Proc debug option info; add to debug 284 * list using kinfo_proc kp_eproc.e_spare 285 * as next pointer; ptr to ptr avoids the 286 * ptr = long assumption. 287 */ 288 dkp = ep->dkp; 289 ep->dkp = kp; 290 *((struct kinfo_proc **)(&kp->kp_eproc.e_spare[0])) = dkp; 291 } 292 } 293 } 294 if ((ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) == -1 && 295 ioctl(STDERR_FILENO, TIOCGWINSZ, &ws) == -1 && 296 ioctl(STDIN_FILENO, TIOCGWINSZ, &ws) == -1) || ws.ws_col == 0) 297 ttywidth = 79; 298 else 299 ttywidth = ws.ws_col - 1; 300 argwidth = ttywidth - WUSED; 301 if (argwidth < 4) 302 argwidth = 8; 303 for (ep = ehead; ep != NULL; ep = ep->next) { 304 if (ep->kp == NULL) { 305 ep->args = "-"; 306 continue; 307 } 308 ep->args = fmt_argv(kvm_getargv(kd, ep->kp, argwidth), 309 ep->kp->kp_proc.p_comm, MAXCOMLEN); 310 if (ep->args == NULL) 311 err(1, NULL); 312 } 313 /* sort by idle time */ 314 if (sortidle && ehead != NULL) { 315 struct entry *from = ehead, *save; 316 317 ehead = NULL; 318 while (from != NULL) { 319 for (nextp = &ehead; 320 (*nextp) && from->idle >= (*nextp)->idle; 321 nextp = &(*nextp)->next) 322 continue; 323 save = from; 324 from = from->next; 325 save->next = *nextp; 326 *nextp = save; 327 } 328 } 329 330 if (!nflag) 331 if (gethostname(domain, sizeof(domain) - 1) < 0 || 332 (p = strchr(domain, '.')) == 0) 333 domain[0] = '\0'; 334 else { 335 domain[sizeof(domain) - 1] = '\0'; 336 memmove(domain, p, strlen(p) + 1); 337 } 338 339 for (ep = ehead; ep != NULL; ep = ep->next) { 340 p = *ep->utmp.ut_host ? ep->utmp.ut_host : "-"; 341 if ((x = strchr(p, ':')) != NULL) 342 *x++ = '\0'; 343 if (!nflag && isdigit(*p) && 344 (long)(l = inet_addr(p)) != -1 && 345 (hp = gethostbyaddr((char *)&l, sizeof(l), AF_INET))) { 346 if (domain[0] != '\0') { 347 p = hp->h_name; 348 p += strlen(hp->h_name); 349 p -= strlen(domain); 350 if (p > hp->h_name && strcmp(p, domain) == 0) 351 *p = '\0'; 352 } 353 p = hp->h_name; 354 } 355 if (nflag && *p && strcmp(p, "-") && 356 inet_addr(p) == INADDR_NONE) { 357 hp = gethostbyname(p); 358 359 if (hp != NULL) { 360 struct in_addr in; 361 362 memmove(&in, hp->h_addr, sizeof(in)); 363 p = inet_ntoa(in); 364 } 365 } 366 if (x) { 367 (void)snprintf(buf, sizeof(buf), "%s:%.*s", p, 368 ep->utmp.ut_host + UT_HOSTSIZE - x, x); 369 p = buf; 370 } 371 if (dflag) { 372 for (dkp = ep->dkp; dkp != NULL; dkp = *((struct kinfo_proc **)(&dkp->kp_eproc.e_spare[0]))) { 373 char *p; 374 p = fmt_argv(kvm_getargv(kd, dkp, argwidth), 375 dkp->kp_proc.p_comm, MAXCOMLEN); 376 if (p == NULL) 377 p = "-"; 378 (void)printf( "\t\t%-9d %s\n", dkp->kp_proc.p_pid, p); 379 } 380 } 381 (void)printf("%-*.*s %-*.*s %-*.*s ", 382 UT_NAMESIZE, UT_NAMESIZE, ep->utmp.ut_name, 383 UT_LINESIZE, UT_LINESIZE, 384 strncmp(ep->utmp.ut_line, "tty", 3) && 385 strncmp(ep->utmp.ut_line, "cua", 3) ? 386 ep->utmp.ut_line : ep->utmp.ut_line + 3, 387 UT_HOSTSIZE, UT_HOSTSIZE, *p ? p : "-"); 388 pr_attime(&ep->utmp.ut_time, &now); 389 longidle = pr_idle(ep->idle); 390 (void)printf("%.*s\n", argwidth - longidle, ep->args); 391 } 392 exit(0); 393 } 394 395 static void 396 pr_header(nowp, nusers) 397 time_t *nowp; 398 int nusers; 399 { 400 double avenrun[3]; 401 time_t uptime; 402 int days, hrs, i, mins, secs; 403 int mib[2]; 404 size_t size; 405 char buf[256]; 406 407 /* 408 * Print time of day. 409 * 410 * SCCS forces the string manipulation below, as it replaces 411 * %, M, and % in a character string with the file name. 412 */ 413 (void)strftime(buf, sizeof(buf) - 1, 414 __CONCAT("%l:%","M%p"), localtime(nowp)); 415 buf[sizeof(buf) - 1] = '\0'; 416 (void)printf("%s ", buf); 417 418 /* 419 * Print how long system has been up. 420 * (Found by looking getting "boottime" from the kernel) 421 */ 422 mib[0] = CTL_KERN; 423 mib[1] = KERN_BOOTTIME; 424 size = sizeof(boottime); 425 if (sysctl(mib, 2, &boottime, &size, NULL, 0) != -1 && 426 boottime.tv_sec != 0) { 427 uptime = now - boottime.tv_sec; 428 uptime += 30; 429 days = uptime / 86400; 430 uptime %= 86400; 431 hrs = uptime / 3600; 432 uptime %= 3600; 433 mins = uptime / 60; 434 secs = uptime % 60; 435 (void)printf(" up"); 436 if (days > 0) 437 (void)printf(" %d day%s,", days, days > 1 ? "s" : ""); 438 if (hrs > 0 && mins > 0) 439 (void)printf(" %2d:%02d,", hrs, mins); 440 else if (hrs > 0) 441 (void)printf(" %d hr%s,", 442 hrs, hrs > 1 ? "s" : ""); 443 else if (mins > 0) 444 (void)printf(" %d min%s,", 445 mins, mins > 1 ? "s" : ""); 446 else 447 (void)printf(" %d sec%s,", 448 secs, secs > 1 ? "s" : ""); 449 } 450 451 /* Print number of users logged in to system */ 452 (void)printf(" %d user%s", nusers, nusers == 1 ? "" : "s"); 453 454 /* 455 * Print 1, 5, and 15 minute load averages. 456 */ 457 if (getloadavg(avenrun, sizeof(avenrun) / sizeof(avenrun[0])) == -1) 458 (void)printf(", no load average information available\n"); 459 else { 460 (void)printf(", load averages:"); 461 for (i = 0; i < (sizeof(avenrun) / sizeof(avenrun[0])); i++) { 462 if (i > 0) 463 (void)printf(","); 464 (void)printf(" %.2f", avenrun[i]); 465 } 466 (void)printf("\n"); 467 } 468 } 469 470 static struct stat * 471 ttystat(line) 472 char *line; 473 { 474 static struct stat sb; 475 char ttybuf[MAXPATHLEN]; 476 477 (void)snprintf(ttybuf, sizeof(ttybuf), "%s/%s", _PATH_DEV, line); 478 if (stat(ttybuf, &sb)) { 479 warn("%s", ttybuf); 480 return NULL; 481 } 482 return (&sb); 483 } 484 485 static void 486 usage(wcmd) 487 int wcmd; 488 { 489 if (wcmd) 490 (void)fprintf(stderr, 491 "usage: w [-dhin] [-M core] [-N system] [user]\n"); 492 else 493 (void)fprintf(stderr, 494 "usage: uptime\n"); 495 exit (1); 496 } 497 498 static int 499 this_is_uptime(s) 500 const char *s; 501 { 502 const char *u; 503 504 if ((u = strrchr(s, '/')) != NULL) 505 ++u; 506 else 507 u = s; 508 if (strcmp(u, "uptime") == 0) 509 return(0); 510 return(-1); 511 } 512 513