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 1.27 1998/05/21 08:46:48 jkoshy 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, *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 if (!(stp = ttystat(utmp.ut_line))) /* corrupted record */ 213 continue; 214 ++nusers; 215 if (wcmd == 0 || (sel_user && 216 strncmp(utmp.ut_name, sel_user, UT_NAMESIZE) != 0)) 217 continue; 218 if ((ep = calloc(1, sizeof(struct entry))) == NULL) 219 errx(1, "calloc"); 220 *nextp = ep; 221 nextp = &(ep->next); 222 memmove(&(ep->utmp), &utmp, sizeof(struct utmp)); 223 ep->tdev = stp->st_rdev; 224 #ifdef CPU_CONSDEV 225 /* 226 * If this is the console device, attempt to ascertain 227 * the true console device dev_t. 228 */ 229 if (ep->tdev == 0) { 230 int mib[2]; 231 size_t size; 232 233 mib[0] = CTL_MACHDEP; 234 mib[1] = CPU_CONSDEV; 235 size = sizeof(dev_t); 236 (void) sysctl(mib, 2, &ep->tdev, &size, NULL, 0); 237 } 238 #endif 239 if ((ep->idle = now - stp->st_atime) < 0) 240 ep->idle = 0; 241 } 242 (void)fclose(ut); 243 244 if (header || wcmd == 0) { 245 pr_header(&now, nusers); 246 if (wcmd == 0) 247 exit (0); 248 249 #define HEADER_USER "USER" 250 #define HEADER_TTY "TTY" 251 #define HEADER_FROM "FROM" 252 #define HEADER_LOGIN_IDLE "LOGIN@ IDLE " 253 #define HEADER_WHAT "WHAT\n" 254 #define WUSED (UT_NAMESIZE + UT_LINESIZE + UT_HOSTSIZE + \ 255 sizeof(HEADER_LOGIN_IDLE) + 3) /* header width incl. spaces */ 256 (void)printf("%-*.*s %-*.*s %-*.*s %s", 257 UT_NAMESIZE, UT_NAMESIZE, HEADER_USER, 258 UT_LINESIZE, UT_LINESIZE, HEADER_TTY, 259 UT_HOSTSIZE, UT_HOSTSIZE, HEADER_FROM, 260 HEADER_LOGIN_IDLE HEADER_WHAT); 261 } 262 263 if ((kp = kvm_getprocs(kd, KERN_PROC_ALL, 0, &nentries)) == NULL) 264 err(1, "%s", kvm_geterr(kd)); 265 for (i = 0; i < nentries; i++, kp++) { 266 struct proc *p = &kp->kp_proc; 267 struct eproc *e; 268 269 if (p->p_stat == SIDL || p->p_stat == SZOMB) 270 continue; 271 e = &kp->kp_eproc; 272 for (ep = ehead; ep != NULL; ep = ep->next) { 273 if (ep->tdev == e->e_tdev) { 274 /* 275 * proc is associated with this terminal 276 */ 277 if (ep->kp == NULL && e->e_pgid == e->e_tpgid) { 278 /* 279 * Proc is 'most interesting' 280 */ 281 if (proc_compare(&ep->kp->kp_proc, p)) 282 ep->kp = kp; 283 } 284 /* 285 * Proc debug option info; add to debug 286 * list using kinfo_proc kp_eproc.e_spare 287 * as next pointer; ptr to ptr avoids the 288 * ptr = long assumption. 289 */ 290 dkp = ep->dkp; 291 ep->dkp = kp; 292 *((struct kinfo_proc **)(&kp->kp_eproc.e_spare[ 0])) = dkp; 293 } 294 } 295 } 296 if ((ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) == -1 && 297 ioctl(STDERR_FILENO, TIOCGWINSZ, &ws) == -1 && 298 ioctl(STDIN_FILENO, TIOCGWINSZ, &ws) == -1) || ws.ws_col == 0) 299 ttywidth = 79; 300 else 301 ttywidth = ws.ws_col - 1; 302 argwidth = ttywidth - WUSED; 303 if (argwidth < 4) 304 argwidth = 8; 305 for (ep = ehead; ep != NULL; ep = ep->next) { 306 if (ep->kp == NULL) { 307 ep->args = "-"; 308 continue; 309 } 310 ep->args = fmt_argv(kvm_getargv(kd, ep->kp, argwidth), 311 ep->kp->kp_proc.p_comm, MAXCOMLEN); 312 if (ep->args == NULL) 313 err(1, NULL); 314 } 315 /* sort by idle time */ 316 if (sortidle && ehead != NULL) { 317 struct entry *from = ehead, *save; 318 319 ehead = NULL; 320 while (from != NULL) { 321 for (nextp = &ehead; 322 (*nextp) && from->idle >= (*nextp)->idle; 323 nextp = &(*nextp)->next) 324 continue; 325 save = from; 326 from = from->next; 327 save->next = *nextp; 328 *nextp = save; 329 } 330 } 331 332 if (!nflag) 333 if (gethostname(domain, sizeof(domain) - 1) < 0 || 334 (p = strchr(domain, '.')) == 0) 335 domain[0] = '\0'; 336 else { 337 domain[sizeof(domain) - 1] = '\0'; 338 memmove(domain, p, strlen(p) + 1); 339 } 340 341 for (ep = ehead; ep != NULL; ep = ep->next) { 342 p = *ep->utmp.ut_host ? ep->utmp.ut_host : "-"; 343 if ((x = strchr(p, ':')) != NULL) 344 *x++ = '\0'; 345 if (!nflag && isdigit(*p) && 346 (long)(l = inet_addr(p)) != -1 && 347 (hp = gethostbyaddr((char *)&l, sizeof(l), AF_INET))) { 348 if (domain[0] != '\0') { 349 p = hp->h_name; 350 p += strlen(hp->h_name); 351 p -= strlen(domain); 352 if (p > hp->h_name && strcmp(p, domain) == 0) 353 *p = '\0'; 354 } 355 p = hp->h_name; 356 } 357 if (nflag && *p && strcmp(p, "-") && inet_addr(p) == INADDR_NONE) { 358 hp = gethostbyname(p); 359 360 if (hp != NULL) { 361 struct in_addr in; 362 363 memmove(&in, hp->h_addr, sizeof(in)); 364 p = inet_ntoa(in); 365 } 366 } 367 if (x) { 368 (void)snprintf(buf, sizeof(buf), "%s:%.*s", p, 369 ep->utmp.ut_host + UT_HOSTSIZE - x, x); 370 p = buf; 371 } 372 if( dflag) { 373 for( dkp = ep->dkp; dkp != NULL; dkp = *((struct kinfo_proc **)(&dkp->kp_eproc.e_spare[ 0]))) { 374 char *p; 375 p = fmt_argv(kvm_getargv(kd, dkp, argwidth), 376 dkp->kp_proc.p_comm, MAXCOMLEN); 377 if (p == NULL) 378 p = "-"; 379 (void)printf( "\t\t%-9d %s\n", dkp->kp_proc.p_pid, p); 380 } 381 } 382 (void)printf("%-*.*s %-*.*s %-*.*s ", 383 UT_NAMESIZE, UT_NAMESIZE, ep->utmp.ut_name, 384 UT_LINESIZE, UT_LINESIZE, 385 strncmp(ep->utmp.ut_line, "tty", 3) && 386 strncmp(ep->utmp.ut_line, "cua", 3) ? 387 ep->utmp.ut_line : ep->utmp.ut_line + 3, 388 UT_HOSTSIZE, UT_HOSTSIZE, *p ? p : "-"); 389 pr_attime(&ep->utmp.ut_time, &now); 390 longidle=pr_idle(ep->idle); 391 if (longidle) 392 argwidth--; 393 (void)printf("%.*s\n", argwidth, ep->args); 394 } 395 exit(0); 396 } 397 398 static void 399 pr_header(nowp, nusers) 400 time_t *nowp; 401 int nusers; 402 { 403 double avenrun[3]; 404 time_t uptime; 405 int days, hrs, i, mins, secs; 406 int mib[2]; 407 size_t size; 408 char buf[256]; 409 410 /* 411 * Print time of day. 412 * 413 * SCCS forces the string manipulation below, as it replaces 414 * %, M, and % in a character string with the file name. 415 */ 416 (void)strftime(buf, sizeof(buf) - 1, 417 __CONCAT("%l:%","M%p"), localtime(nowp)); 418 buf[sizeof(buf) - 1] = '\0'; 419 (void)printf("%s ", buf); 420 421 /* 422 * Print how long system has been up. 423 * (Found by looking getting "boottime" from the kernel) 424 */ 425 mib[0] = CTL_KERN; 426 mib[1] = KERN_BOOTTIME; 427 size = sizeof(boottime); 428 if (sysctl(mib, 2, &boottime, &size, NULL, 0) != -1 && 429 boottime.tv_sec != 0) { 430 uptime = now - boottime.tv_sec; 431 uptime += 30; 432 days = uptime / 86400; 433 uptime %= 86400; 434 hrs = uptime / 3600; 435 uptime %= 3600; 436 mins = uptime / 60; 437 secs = uptime % 60; 438 (void)printf(" up"); 439 if (days > 0) 440 (void)printf(" %d day%s,", days, days > 1 ? "s" : ""); 441 if (hrs > 0 && mins > 0) 442 (void)printf(" %2d:%02d,", hrs, mins); 443 else if (hrs > 0) 444 (void)printf(" %d hr%s,", 445 hrs, hrs > 1 ? "s" : ""); 446 else if (mins > 0) 447 (void)printf(" %d min%s,", 448 mins, mins > 1 ? "s" : ""); 449 else 450 (void)printf(" %d sec%s,", 451 secs, secs > 1 ? "s" : ""); 452 } 453 454 /* Print number of users logged in to system */ 455 (void)printf(" %d user%s", nusers, nusers == 1 ? "" : "s"); 456 457 /* 458 * Print 1, 5, and 15 minute load averages. 459 */ 460 if (getloadavg(avenrun, sizeof(avenrun) / sizeof(avenrun[0])) == -1) 461 (void)printf(", no load average information available\n"); 462 else { 463 (void)printf(", load averages:"); 464 for (i = 0; i < (sizeof(avenrun) / sizeof(avenrun[0])); i++) { 465 if (i > 0) 466 (void)printf(","); 467 (void)printf(" %.2f", avenrun[i]); 468 } 469 (void)printf("\n"); 470 } 471 } 472 473 static struct stat * 474 ttystat(line) 475 char *line; 476 { 477 static struct stat sb; 478 char ttybuf[MAXPATHLEN]; 479 480 (void)snprintf(ttybuf, sizeof(ttybuf), "%s/%s", _PATH_DEV, line); 481 if (stat(ttybuf, &sb)) { 482 warn("%s", ttybuf); 483 return NULL; 484 } 485 return (&sb); 486 } 487 488 static void 489 usage(wcmd) 490 int wcmd; 491 { 492 if (wcmd) 493 (void)fprintf(stderr, 494 "usage: w [-dhin] [-M core] [-N system] [user]\n"); 495 else 496 (void)fprintf(stderr, 497 "usage: uptime\n"); 498 exit (1); 499 } 500