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 1.22 1997/09/12 02:22:21 ache 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 bu 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)); 121 122 char *fmt_argv __P((char **, char *, int)); /* ../../bin/ps/fmt.c */ 123 124 int 125 main(argc, argv) 126 int argc; 127 char **argv; 128 { 129 extern char *__progname; 130 struct kinfo_proc *kp; 131 struct kinfo_proc *dkp; 132 struct hostent *hp; 133 struct stat *stp; 134 FILE *ut; 135 u_long l; 136 size_t arglen; 137 int ch, i, nentries, nusers, wcmd, longidle; 138 char *memf, *nlistf, *p, *vis_args, *x; 139 char buf[MAXHOSTNAMELEN], errbuf[256]; 140 141 (void) setlocale(LC_ALL, ""); 142 143 /* Are we w(1) or uptime(1)? */ 144 p = __progname; 145 if (*p == '-') 146 p++; 147 if (*p == 'u') { 148 wcmd = 0; 149 p = ""; 150 } else { 151 wcmd = 1; 152 p = "dhiflM:N:nsuw"; 153 } 154 155 memf = nlistf = NULL; 156 while ((ch = getopt(argc, argv, p)) != -1) 157 switch (ch) { 158 case 'd': 159 dflag = 1; 160 break; 161 case 'h': 162 header = 0; 163 break; 164 case 'i': 165 sortidle = 1; 166 break; 167 case 'M': 168 header = 0; 169 memf = optarg; 170 break; 171 case 'N': 172 nlistf = optarg; 173 break; 174 case 'n': 175 nflag = 1; 176 break; 177 case 'f': case 'l': case 's': case 'u': case 'w': 178 warnx("[-flsuw] no longer supported"); 179 /* FALLTHROUGH */ 180 case '?': 181 default: 182 usage(wcmd); 183 } 184 argc -= optind; 185 argv += optind; 186 187 if (!(_res.options & RES_INIT)) 188 res_init(); 189 _res.retrans = 2; /* resolver timeout to 2 seconds per try */ 190 _res.retry = 1; /* only try once.. */ 191 192 /* 193 * Discard setgid privileges if not the running kernel so that bad 194 * guys can't print interesting stuff from kernel memory. 195 */ 196 if (nlistf != NULL || memf != NULL) 197 setgid(getgid()); 198 199 if ((kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf)) == NULL) 200 errx(1, "%s", errbuf); 201 202 (void)time(&now); 203 if ((ut = fopen(_PATH_UTMP, "r")) == NULL) 204 err(1, "%s", _PATH_UTMP); 205 206 if (*argv) 207 sel_user = *argv; 208 209 for (nusers = 0; fread(&utmp, sizeof(utmp), 1, ut);) { 210 if (utmp.ut_name[0] == '\0') 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 stp = ttystat(ep->utmp.ut_line); 222 ep->tdev = stp->st_rdev; 223 #ifdef CPU_CONSDEV 224 /* 225 * If this is the console device, attempt to ascertain 226 * the true console device dev_t. 227 */ 228 if (ep->tdev == 0) { 229 int mib[2]; 230 size_t size; 231 232 mib[0] = CTL_MACHDEP; 233 mib[1] = CPU_CONSDEV; 234 size = sizeof(dev_t); 235 (void) sysctl(mib, 2, &ep->tdev, &size, NULL, 0); 236 } 237 #endif 238 if ((ep->idle = now - stp->st_atime) < 0) 239 ep->idle = 0; 240 } 241 (void)fclose(ut); 242 243 if (header || wcmd == 0) { 244 pr_header(&now, nusers); 245 if (wcmd == 0) 246 exit (0); 247 248 #define HEADER "USER TTY FROM LOGIN@ IDLE WHAT\n" 249 #define WUSED (sizeof (HEADER) - sizeof ("WHAT\n")) 250 (void)printf(HEADER); 251 } 252 253 if ((kp = kvm_getprocs(kd, KERN_PROC_ALL, 0, &nentries)) == NULL) 254 err(1, "%s", kvm_geterr(kd)); 255 for (i = 0; i < nentries; i++, kp++) { 256 struct proc *p = &kp->kp_proc; 257 struct eproc *e; 258 259 if (p->p_stat == SIDL || p->p_stat == SZOMB) 260 continue; 261 e = &kp->kp_eproc; 262 for (ep = ehead; ep != NULL; ep = ep->next) { 263 if (ep->tdev == e->e_tdev) { 264 /* 265 * proc is associated with this terminal 266 */ 267 if (ep->kp == NULL && e->e_pgid == e->e_tpgid) { 268 /* 269 * Proc is 'most interesting' 270 */ 271 if (proc_compare(&ep->kp->kp_proc, p)) 272 ep->kp = kp; 273 } 274 /* 275 * Proc debug option info; add to debug 276 * list using kinfo_proc kp_eproc.e_spare 277 * as next pointer; ptr to ptr avoids the 278 * ptr = long assumption. 279 */ 280 dkp = ep->dkp; 281 ep->dkp = kp; 282 *((struct kinfo_proc **)(&kp->kp_eproc.e_spare[ 0])) = dkp; 283 } 284 } 285 } 286 if ((ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) == -1 && 287 ioctl(STDERR_FILENO, TIOCGWINSZ, &ws) == -1 && 288 ioctl(STDIN_FILENO, TIOCGWINSZ, &ws) == -1) || ws.ws_col == 0) 289 ttywidth = 79; 290 else 291 ttywidth = ws.ws_col - 1; 292 argwidth = ttywidth - WUSED; 293 if (argwidth < 4) 294 argwidth = 8; 295 for (ep = ehead; ep != NULL; ep = ep->next) { 296 if (ep->kp == NULL) { 297 ep->args = "-"; 298 continue; 299 } 300 ep->args = fmt_argv(kvm_getargv(kd, ep->kp, argwidth), 301 ep->kp->kp_proc.p_comm, MAXCOMLEN); 302 if (ep->args == NULL) 303 err(1, NULL); 304 } 305 /* sort by idle time */ 306 if (sortidle && ehead != NULL) { 307 struct entry *from = ehead, *save; 308 309 ehead = NULL; 310 while (from != NULL) { 311 for (nextp = &ehead; 312 (*nextp) && from->idle >= (*nextp)->idle; 313 nextp = &(*nextp)->next) 314 continue; 315 save = from; 316 from = from->next; 317 save->next = *nextp; 318 *nextp = save; 319 } 320 } 321 322 if (!nflag) 323 if (gethostname(domain, sizeof(domain) - 1) < 0 || 324 (p = strchr(domain, '.')) == 0) 325 domain[0] = '\0'; 326 else { 327 domain[sizeof(domain) - 1] = '\0'; 328 memmove(domain, p, strlen(p) + 1); 329 } 330 331 if ((vis_args = malloc(argwidth * 4 + 1)) == NULL) 332 errx(1, "malloc"); 333 for (ep = ehead; ep != NULL; ep = ep->next) { 334 p = *ep->utmp.ut_host ? ep->utmp.ut_host : "-"; 335 if ((x = strchr(p, ':')) != NULL) 336 *x++ = '\0'; 337 if (!nflag && isdigit(*p) && 338 (long)(l = inet_addr(p)) != -1 && 339 (hp = gethostbyaddr((char *)&l, sizeof(l), AF_INET))) { 340 if (domain[0] != '\0') { 341 p = hp->h_name; 342 p += strlen(hp->h_name); 343 p -= strlen(domain); 344 if (p > hp->h_name && strcmp(p, domain) == 0) 345 *p = '\0'; 346 } 347 p = hp->h_name; 348 } 349 if (nflag && *p && strcmp(p, "-") && inet_addr(p) == INADDR_NONE) { 350 hp = gethostbyname(p); 351 352 if (hp != NULL) { 353 struct in_addr in; 354 355 memmove(&in, hp->h_addr, sizeof(in)); 356 p = inet_ntoa(in); 357 } 358 } 359 if (x) { 360 (void)snprintf(buf, sizeof(buf), "%s:%.*s", p, 361 ep->utmp.ut_host + UT_HOSTSIZE - x, x); 362 p = buf; 363 } 364 if( dflag) { 365 for( dkp = ep->dkp; dkp != NULL; dkp = *((struct kinfo_proc **)(&dkp->kp_eproc.e_spare[ 0]))) { 366 char *p; 367 p = fmt_argv(kvm_getargv(kd, dkp, argwidth), 368 dkp->kp_proc.p_comm, MAXCOMLEN); 369 if (p == NULL) 370 p = "-"; 371 (void)printf( "\t\t%-9d %s\n", dkp->kp_proc.p_pid, p); 372 } 373 } 374 (void)printf("%-*.*s %-3.3s %-*.*s ", 375 UT_NAMESIZE, UT_NAMESIZE, ep->utmp.ut_name, 376 strncmp(ep->utmp.ut_line, "tty", 3) && 377 strncmp(ep->utmp.ut_line, "cua", 3) ? 378 ep->utmp.ut_line : ep->utmp.ut_line + 3, 379 UT_HOSTSIZE, UT_HOSTSIZE, *p ? p : "-"); 380 pr_attime(&ep->utmp.ut_time, &now); 381 longidle=pr_idle(ep->idle); 382 if (longidle) 383 argwidth--; 384 if (ep->args != NULL) { 385 arglen = strlen(ep->args); 386 strvisx(vis_args, ep->args, 387 arglen > argwidth ? argwidth : arglen, 388 VIS_TAB | VIS_NL | VIS_NOSLASH); 389 } 390 (void)printf("%.*s\n", argwidth, 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; 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 (void)printf(" up"); 435 if (days > 0) 436 (void)printf(" %d day%s,", days, days > 1 ? "s" : ""); 437 if (hrs > 0 && mins > 0) 438 (void)printf(" %2d:%02d,", hrs, mins); 439 else { 440 if (hrs > 0) 441 (void)printf(" %d hr%s,", 442 hrs, hrs > 1 ? "s" : ""); 443 if (mins > 0) 444 (void)printf(" %d min%s,", 445 mins, mins > 1 ? "s" : ""); 446 } 447 } 448 449 /* Print number of users logged in to system */ 450 (void)printf(" %d user%s", nusers, nusers == 1 ? "" : "s"); 451 452 /* 453 * Print 1, 5, and 15 minute load averages. 454 */ 455 if (getloadavg(avenrun, sizeof(avenrun) / sizeof(avenrun[0])) == -1) 456 (void)printf(", no load average information available\n"); 457 else { 458 (void)printf(", load averages:"); 459 for (i = 0; i < (sizeof(avenrun) / sizeof(avenrun[0])); i++) { 460 if (i > 0) 461 (void)printf(","); 462 (void)printf(" %.2f", avenrun[i]); 463 } 464 (void)printf("\n"); 465 } 466 } 467 468 static struct stat * 469 ttystat(line) 470 char *line; 471 { 472 static struct stat sb; 473 char ttybuf[MAXPATHLEN]; 474 475 (void)snprintf(ttybuf, sizeof(ttybuf), "%s/%s", _PATH_DEV, line); 476 if (stat(ttybuf, &sb)) 477 err(1, "%s", ttybuf); 478 return (&sb); 479 } 480 481 static void 482 usage(wcmd) 483 int wcmd; 484 { 485 if (wcmd) 486 (void)fprintf(stderr, 487 "usage: w [-dhin] [-M core] [-N system] [user]\n"); 488 else 489 (void)fprintf(stderr, 490 "usage: uptime\n"); 491 exit (1); 492 } 493