1 /* $NetBSD: w.c,v 1.47 2001/11/05 03:35:49 enami Exp $ */ 2 3 /*- 4 * Copyright (c) 1980, 1991, 1993, 1994 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #include <sys/cdefs.h> 37 #ifndef lint 38 __COPYRIGHT("@(#) Copyright (c) 1980, 1991, 1993, 1994\n\ 39 The Regents of the University of California. All rights reserved.\n"); 40 #endif /* not lint */ 41 42 #ifndef lint 43 #if 0 44 static char sccsid[] = "@(#)w.c 8.6 (Berkeley) 6/30/94"; 45 #else 46 __RCSID("$NetBSD: w.c,v 1.47 2001/11/05 03:35:49 enami Exp $"); 47 #endif 48 #endif /* not lint */ 49 50 /* 51 * w - print system status (who and what) 52 * 53 * This program is similar to the systat command on Tenex/Tops 10/20 54 * 55 */ 56 #include <sys/param.h> 57 #include <sys/types.h> 58 #include <sys/time.h> 59 #include <sys/stat.h> 60 #include <sys/sysctl.h> 61 #include <sys/proc.h> 62 #include <sys/user.h> 63 #include <sys/ioctl.h> 64 #include <sys/socket.h> 65 66 #include <netinet/in.h> 67 #include <arpa/inet.h> 68 69 #include <ctype.h> 70 #include <err.h> 71 #include <errno.h> 72 #include <fcntl.h> 73 #include <kvm.h> 74 #include <limits.h> 75 #include <netdb.h> 76 #include <nlist.h> 77 #include <paths.h> 78 #include <stdio.h> 79 #include <stdlib.h> 80 #include <string.h> 81 #include <time.h> 82 #include <tzfile.h> 83 #include <unistd.h> 84 #include <utmp.h> 85 #include <vis.h> 86 87 #include "extern.h" 88 89 #define max(a,b) (((a)>(b))?(a):(b)) 90 91 struct timeval boottime; 92 struct utmp utmp; 93 struct winsize ws; 94 kvm_t *kd; 95 time_t now; /* the current time of day */ 96 time_t uptime; /* time of last reboot & elapsed time since */ 97 int ttywidth; /* width of tty */ 98 int argwidth; /* width of tty left to print process args */ 99 int header = 1; /* true if -h flag: don't print heading */ 100 int nflag; /* true if -n flag: don't convert addrs */ 101 int sortidle; /* sort bu idle time */ 102 char *sel_user; /* login of particular user selected */ 103 char domain[MAXHOSTNAMELEN + 1]; 104 105 /* 106 * One of these per active utmp entry. 107 */ 108 struct entry { 109 struct entry *next; 110 struct utmp utmp; 111 dev_t tdev; /* dev_t of terminal */ 112 time_t idle; /* idle time of terminal in seconds */ 113 struct kinfo_proc2 *kp; /* `most interesting' proc */ 114 #ifdef SUPPORT_FTPD_UTMP 115 pid_t ftpd_pid; /* pid as extracted from ftpd's entry */ 116 #endif 117 } *ep, *ehead = NULL, **nextp = &ehead; 118 119 static void pr_args(struct kinfo_proc2 *); 120 static void pr_header(time_t *, int); 121 static struct stat *ttystat(char *, size_t); 122 static void usage(int); 123 int main(int, char **); 124 125 int 126 main(int argc, char **argv) 127 { 128 struct kinfo_proc2 *kp; 129 struct hostent *hp; 130 struct stat *stp; 131 FILE *ut; 132 struct in_addr l; 133 time_t touched; 134 int ch, i, nentries, nusers, wcmd, lognamelen; 135 char *memf, *nlistf, *p, *x; 136 const char *progname; 137 char buf[MAXHOSTNAMELEN], errbuf[_POSIX2_LINE_MAX]; 138 139 /* Are we w(1) or uptime(1)? */ 140 progname = getprogname(); 141 if (*progname == '-') 142 progname++; 143 if (*progname == 'u') { 144 wcmd = 0; 145 p = ""; 146 } else { 147 wcmd = 1; 148 p = "hiflM:N:nsuw"; 149 } 150 151 memf = nlistf = NULL; 152 while ((ch = getopt(argc, argv, p)) != -1) 153 switch (ch) { 154 case 'h': 155 header = 0; 156 break; 157 case 'i': 158 sortidle = 1; 159 break; 160 case 'M': 161 header = 0; 162 memf = optarg; 163 break; 164 case 'N': 165 nlistf = optarg; 166 break; 167 case 'n': 168 nflag = 1; 169 break; 170 case 'f': case 'l': case 's': case 'u': case 'w': 171 warnx("[-flsuw] no longer supported"); 172 /* FALLTHROUGH */ 173 case '?': 174 default: 175 usage(wcmd); 176 } 177 argc -= optind; 178 argv += optind; 179 180 if ((kd = kvm_openfiles(nlistf, memf, NULL, 181 memf == NULL ? KVM_NO_FILES : O_RDONLY, errbuf)) == NULL) 182 errx(1, "%s", errbuf); 183 184 (void)time(&now); 185 if ((ut = fopen(_PATH_UTMP, "r")) == NULL && wcmd) 186 err(1, "%s", _PATH_UTMP); 187 188 if (*argv) 189 sel_user = *argv; 190 191 for (nusers = 0; ut && fread(&utmp, sizeof(utmp), 1, ut);) { 192 if (utmp.ut_name[0] == '\0') 193 continue; 194 ++nusers; 195 if (wcmd == 0 || (sel_user && 196 strncmp(utmp.ut_name, sel_user, UT_NAMESIZE) != 0)) 197 continue; 198 if ((ep = calloc(1, sizeof(struct entry))) == NULL) 199 err(1, NULL); 200 *nextp = ep; 201 nextp = &(ep->next); 202 memmove(&(ep->utmp), &utmp, sizeof(struct utmp)); 203 if (!(stp = ttystat(ep->utmp.ut_line, UT_LINESIZE))) { 204 #ifdef SUPPORT_FTPD_UTMP 205 /* 206 * Hack to recognize and correctly parse 207 * utmp entry made by ftpd. The "tty" used 208 * by ftpd is not a real tty, just identifier in 209 * form ftpPROCESS_ID. Pid parsed from the "tty name" 210 * is used later to match corresponding process. 211 */ 212 if (strncmp(ep->utmp.ut_line, "ftp", 3) == 0) 213 ep->ftpd_pid = 214 strtol(ep->utmp.ut_line + 3, NULL, 10); 215 #endif /* SUPPORT_FTPD_UTMP */ 216 217 continue; 218 } 219 ep->tdev = stp->st_rdev; 220 /* 221 * If this is the console device, attempt to ascertain 222 * the true console device dev_t. 223 */ 224 if (ep->tdev == 0) { 225 int mib[2]; 226 size_t size; 227 228 mib[0] = CTL_KERN; 229 mib[1] = KERN_CONSDEV; 230 size = sizeof(dev_t); 231 (void) sysctl(mib, 2, &ep->tdev, &size, NULL, 0); 232 } 233 234 touched = stp->st_atime; 235 if (touched < ep->utmp.ut_time) { 236 /* tty untouched since before login */ 237 touched = ep->utmp.ut_time; 238 } 239 if ((ep->idle = now - touched) < 0) 240 ep->idle = 0; 241 } 242 if (ut) 243 (void)fclose(ut); 244 else 245 nusers = 1; 246 247 if (header || wcmd == 0) { 248 pr_header(&now, nusers); 249 if (wcmd == 0) 250 exit (0); 251 } 252 253 if ((kp = kvm_getproc2(kd, KERN_PROC_ALL, 0, 254 sizeof(struct kinfo_proc2), &nentries)) == NULL) 255 errx(1, "%s", kvm_geterr(kd)); 256 257 /* Include trailing space because TTY header starts one column early. */ 258 lognamelen = sizeof("USER ") - 1 /* NUL */; 259 for (i = 0; i < nentries; i++, kp++) { 260 261 if (kp->p_stat == SIDL || kp->p_stat == SZOMB) 262 continue; 263 264 for (ep = ehead; ep != NULL; ep = ep->next) { 265 if (ep->tdev == kp->p_tdev && 266 kp->p__pgid == kp->p_tpgid) { 267 /* 268 * Proc is in foreground of this terminal 269 */ 270 if (proc_compare(ep->kp, kp)) { 271 ep->kp = kp; 272 lognamelen = max(lognamelen, 273 strlen(kp->p_login)); 274 } 275 break; 276 } 277 #ifdef SUPPORT_FTPD_UTMP 278 /* 279 * Hack to match process to ftp utmp entry. 280 */ 281 else if (ep->tdev == 0 && kp->p_tdev == NODEV && 282 ep->ftpd_pid == kp->p_pid) { 283 ep->kp = kp; 284 lognamelen = max(lognamelen, 285 strlen(kp->p_login)); 286 } 287 #endif /* SUPPORT_FTPD_UTMP */ 288 } 289 } 290 291 argwidth = printf("%-*sTTY %-*s %*s IDLE WHAT\n", 292 lognamelen, "USER", UT_HOSTSIZE, "FROM", 293 7 /* "dddhhXm" */, "LOGIN@"); 294 argwidth -= sizeof("WHAT\n") - 1 /* NUL */; 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 - argwidth; 303 if (argwidth < 4) 304 argwidth = 8; 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 int rv; 324 325 rv = gethostname(domain, sizeof(domain)); 326 domain[sizeof(domain) - 1] = '\0'; 327 if (rv < 0 || (p = strchr(domain, '.')) == 0) 328 domain[0] = '\0'; 329 else 330 memmove(domain, p, strlen(p) + 1); 331 } 332 333 for (ep = ehead; ep != NULL; ep = ep->next) { 334 char host_buf[UT_HOSTSIZE + 1]; 335 336 host_buf[UT_HOSTSIZE] = '\0'; 337 strncpy(host_buf, ep->utmp.ut_host, UT_HOSTSIZE); 338 p = *host_buf ? host_buf : "-"; 339 340 for (x = p; x < p + UT_HOSTSIZE; x++) 341 if (*x == '\0' || *x == ':') 342 break; 343 if (x == p + UT_HOSTSIZE || *x != ':') 344 x = NULL; 345 else 346 *x++ = '\0'; 347 348 if (!nflag && inet_aton(p, &l) && 349 (hp = gethostbyaddr((char *)&l, sizeof(l), AF_INET))) { 350 if (domain[0] != '\0') { 351 p = hp->h_name; 352 p += strlen(hp->h_name); 353 p -= strlen(domain); 354 if (p > hp->h_name && 355 strcasecmp(p, domain) == 0) 356 *p = '\0'; 357 } 358 p = hp->h_name; 359 } 360 if (x) { 361 (void)snprintf(buf, sizeof(buf), "%s:%s", p, x); 362 p = buf; 363 } 364 if (ep->kp == NULL) { 365 warnx("Stale utmp entry: %.*s %.*s %.*s", 366 UT_NAMESIZE, ep->utmp.ut_name, 367 UT_LINESIZE, ep->utmp.ut_line, 368 UT_HOSTSIZE, ep->utmp.ut_host); 369 continue; 370 } 371 (void)printf("%-*s %-2.2s %-*.*s ", 372 lognamelen, ep->kp->p_login, 373 (strncmp(ep->utmp.ut_line, "tty", 3) && 374 strncmp(ep->utmp.ut_line, "dty", 3)) ? 375 ep->utmp.ut_line : ep->utmp.ut_line + 3, 376 UT_HOSTSIZE, UT_HOSTSIZE, *p ? p : "-"); 377 pr_attime(&ep->utmp.ut_time, &now); 378 pr_idle(ep->idle); 379 pr_args(ep->kp); 380 (void)printf("\n"); 381 } 382 exit(0); 383 } 384 385 static void 386 pr_args(struct kinfo_proc2 *kp) 387 { 388 char **argv; 389 int left; 390 391 if (kp == 0) 392 goto nothing; 393 left = argwidth; 394 argv = kvm_getargv2(kd, kp, argwidth); 395 if (argv == 0) 396 goto nothing; 397 while (*argv) { 398 fmt_puts(*argv, &left); 399 argv++; 400 fmt_putc(' ', &left); 401 } 402 return; 403 nothing: 404 putchar('-'); 405 } 406 407 static void 408 pr_header(time_t *nowp, int nusers) 409 { 410 double avenrun[3]; 411 time_t uptime; 412 int days, hrs, i, mins; 413 int mib[2]; 414 size_t size; 415 char buf[256]; 416 417 /* 418 * Print time of day. 419 * 420 * SCCS forces the string manipulation below, as it replaces 421 * %, M, and % in a character string with the file name. 422 */ 423 (void)strftime(buf, sizeof(buf), "%l:%" "M%p", localtime(nowp)); 424 buf[sizeof(buf) - 1] = '\0'; 425 (void)printf("%s ", buf); 426 427 /* 428 * Print how long system has been up. 429 * (Found by looking getting "boottime" from the kernel) 430 */ 431 mib[0] = CTL_KERN; 432 mib[1] = KERN_BOOTTIME; 433 size = sizeof(boottime); 434 if (sysctl(mib, 2, &boottime, &size, NULL, 0) != -1 && 435 boottime.tv_sec != 0) { 436 uptime = now - boottime.tv_sec; 437 uptime += 30; 438 if (uptime > SECSPERMIN) { 439 days = uptime / SECSPERDAY; 440 uptime %= SECSPERDAY; 441 hrs = uptime / SECSPERHOUR; 442 uptime %= SECSPERHOUR; 443 mins = uptime / SECSPERMIN; 444 (void)printf(" up"); 445 if (days > 0) 446 (void)printf(" %d day%s,", days, 447 days > 1 ? "s" : ""); 448 if (hrs > 0 && mins > 0) 449 (void)printf(" %2d:%02d,", hrs, mins); 450 else { 451 if (hrs > 0) 452 (void)printf(" %d hr%s,", 453 hrs, hrs > 1 ? "s" : ""); 454 if (mins > 0) 455 (void)printf(" %d min%s,", 456 mins, mins > 1 ? "s" : ""); 457 } 458 } 459 } 460 461 /* Print number of users logged in to system */ 462 (void)printf(" %d user%s", nusers, nusers != 1 ? "s" : ""); 463 464 /* 465 * Print 1, 5, and 15 minute load averages. 466 */ 467 if (getloadavg(avenrun, sizeof(avenrun) / sizeof(avenrun[0])) == -1) 468 (void)printf(", no load average information available\n"); 469 else { 470 (void)printf(", load averages:"); 471 for (i = 0; i < (sizeof(avenrun) / sizeof(avenrun[0])); i++) { 472 if (i > 0) 473 (void)printf(","); 474 (void)printf(" %.2f", avenrun[i]); 475 } 476 (void)printf("\n"); 477 } 478 } 479 480 static struct stat * 481 ttystat(char *line, size_t sz) 482 { 483 static struct stat sb; 484 char ttybuf[MAXPATHLEN]; 485 486 (void)snprintf(ttybuf, sizeof(ttybuf), "%s%.*s", _PATH_DEV, (int) sz, 487 line); 488 if (stat(ttybuf, &sb)) 489 return (NULL); 490 return (&sb); 491 } 492 493 static void 494 usage(int wcmd) 495 { 496 497 if (wcmd) 498 (void)fprintf(stderr, 499 "usage: w: [-hin] [-M core] [-N system] [user]\n"); 500 else 501 (void)fprintf(stderr, "uptime\n"); 502 exit(1); 503 } 504