1 /* $OpenBSD: w.c,v 1.46 2008/09/30 21:29:58 millert 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. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #ifndef lint 33 static char copyright[] = 34 "@(#) Copyright (c) 1980, 1991, 1993, 1994\n\ 35 The Regents of the University of California. All rights reserved.\n"; 36 #endif /* not lint */ 37 38 #ifndef lint 39 #if 0 40 static char sccsid[] = "@(#)w.c 8.4 (Berkeley) 4/16/94"; 41 #else 42 static char *rcsid = "$OpenBSD: w.c,v 1.46 2008/09/30 21:29:58 millert Exp $"; 43 #endif 44 #endif /* not lint */ 45 46 /* 47 * w - print system status (who and what) 48 * 49 * This program is similar to the systat command on Tenex/Tops 10/20 50 * 51 */ 52 #include <sys/param.h> 53 #include <sys/time.h> 54 #include <sys/stat.h> 55 #include <sys/sysctl.h> 56 #include <sys/proc.h> 57 #include <sys/user.h> 58 #include <sys/ioctl.h> 59 #include <sys/socket.h> 60 #include <sys/tty.h> 61 62 #include <machine/cpu.h> 63 #include <netinet/in.h> 64 #include <arpa/inet.h> 65 66 #include <ctype.h> 67 #include <err.h> 68 #include <errno.h> 69 #include <fcntl.h> 70 #include <kvm.h> 71 #include <netdb.h> 72 #include <nlist.h> 73 #include <paths.h> 74 #include <stdio.h> 75 #include <stdlib.h> 76 #include <string.h> 77 #include <tzfile.h> 78 #include <unistd.h> 79 #include <limits.h> 80 #include <utmp.h> 81 #include <vis.h> 82 83 #include "extern.h" 84 85 struct timeval boottime; 86 struct utmp utmp; 87 struct winsize ws; 88 kvm_t *kd; 89 time_t now; /* the current time of day */ 90 int ttywidth; /* width of tty */ 91 int argwidth; /* width of tty */ 92 int header = 1; /* true if -h flag: don't print heading */ 93 int nflag = 1; /* true if -n flag: don't convert addrs */ 94 int sortidle; /* sort bu idle time */ 95 char *sel_user; /* login of particular user selected */ 96 char domain[MAXHOSTNAMELEN]; 97 98 #define NAME_WIDTH 8 99 #define HOST_WIDTH 16 100 101 /* 102 * One of these per active utmp entry. 103 */ 104 struct entry { 105 struct entry *next; 106 struct utmp utmp; 107 dev_t tdev; /* dev_t of terminal */ 108 time_t idle; /* idle time of terminal in seconds */ 109 struct kinfo_proc2 *kp; /* `most interesting' proc */ 110 } *ep, *ehead = NULL, **nextp = &ehead; 111 112 static void pr_args(struct kinfo_proc2 *); 113 static void pr_header(time_t *, int); 114 static struct stat 115 *ttystat(char *); 116 static void usage(int); 117 118 int 119 main(int argc, char *argv[]) 120 { 121 extern char *__progname; 122 struct kinfo_proc2 *kp; 123 struct hostent *hp; 124 struct stat *stp; 125 FILE *ut; 126 struct in_addr addr; 127 int ch, i, nentries, nusers, wcmd; 128 char *memf, *nlistf, *p, *x; 129 char buf[MAXHOSTNAMELEN], errbuf[_POSIX2_LINE_MAX]; 130 131 /* Are we w(1) or uptime(1)? */ 132 p = __progname; 133 if (*p == '-') 134 p++; 135 if (p[0] == 'w' && p[1] == '\0') { 136 wcmd = 1; 137 p = "hiflM:N:asuw"; 138 } else if (!strcmp(p, "uptime")) { 139 wcmd = 0; 140 p = ""; 141 } else 142 errx(1, 143 "this program should be invoked only as \"w\" or \"uptime\""); 144 145 memf = nlistf = NULL; 146 while ((ch = getopt(argc, argv, p)) != -1) 147 switch (ch) { 148 case 'h': 149 header = 0; 150 break; 151 case 'i': 152 sortidle = 1; 153 break; 154 case 'M': 155 header = 0; 156 memf = optarg; 157 break; 158 case 'N': 159 nlistf = optarg; 160 break; 161 case 'a': 162 nflag = 0; 163 break; 164 case 'f': case 'l': case 's': case 'u': case 'w': 165 warnx("[-flsuw] no longer supported"); 166 /* FALLTHROUGH */ 167 case '?': 168 default: 169 usage(wcmd); 170 } 171 argc -= optind; 172 argv += optind; 173 174 if (nlistf == NULL && memf == NULL) { 175 if ((kd = kvm_openfiles(nlistf, memf, NULL, KVM_NO_FILES, 176 errbuf)) == NULL) 177 errx(1, "%s", errbuf); 178 } else { 179 if ((kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf)) == NULL) 180 errx(1, "%s", errbuf); 181 } 182 183 (void)time(&now); 184 if ((ut = fopen(_PATH_UTMP, "r")) == NULL) 185 err(1, "%s", _PATH_UTMP); 186 187 if (*argv) 188 sel_user = *argv; 189 190 for (nusers = 0; fread(&utmp, sizeof(utmp), 1, ut);) { 191 if (utmp.ut_name[0] == '\0') 192 continue; 193 ++nusers; 194 if (wcmd == 0 || (sel_user && 195 strncmp(utmp.ut_name, sel_user, UT_NAMESIZE) != 0)) 196 continue; 197 if ((ep = calloc(1, sizeof(*ep))) == NULL) 198 err(1, NULL); 199 *nextp = ep; 200 nextp = &(ep->next); 201 memcpy(&(ep->utmp), &utmp, sizeof(utmp)); 202 if (!(stp = ttystat(ep->utmp.ut_line))) 203 continue; 204 ep->tdev = stp->st_rdev; 205 #ifdef CPU_CONSDEV 206 /* 207 * If this is the console device, attempt to ascertain 208 * the true console device dev_t. 209 */ 210 if (ep->tdev == 0) { 211 int mib[2]; 212 size_t size; 213 214 mib[0] = CTL_MACHDEP; 215 mib[1] = CPU_CONSDEV; 216 size = sizeof(dev_t); 217 (void) sysctl(mib, 2, &ep->tdev, &size, NULL, 0); 218 } 219 #endif 220 if ((ep->idle = now - stp->st_atime) < 0) 221 ep->idle = 0; 222 } 223 (void)fclose(ut); 224 225 if (header || wcmd == 0) { 226 pr_header(&now, nusers); 227 if (wcmd == 0) 228 exit (0); 229 } 230 231 #define HEADER "USER TTY FROM LOGIN@ IDLE WHAT" 232 #define WUSED (sizeof(HEADER) - sizeof("WHAT")) 233 (void)puts(HEADER); 234 235 kp = kvm_getproc2(kd, KERN_PROC_ALL, 0, sizeof(*kp), &nentries); 236 if (kp == NULL) 237 errx(1, "%s", kvm_geterr(kd)); 238 for (i = 0; i < nentries; i++, kp++) { 239 if (kp->p_stat == SIDL || kp->p_stat == SZOMB) 240 continue; 241 for (ep = ehead; ep != NULL; ep = ep->next) { 242 /* ftp is a special case. */ 243 if (strncmp(ep->utmp.ut_line, "ftp", 3) == 0) { 244 char pidstr[UT_LINESIZE-2]; 245 pid_t fp; 246 247 (void)strncpy(pidstr, &ep->utmp.ut_line[3], 248 sizeof(pidstr) - 1); 249 pidstr[sizeof(pidstr) - 1] = '\0'; 250 fp = (pid_t)strtol(pidstr, NULL, 10); 251 if (kp->p_pid == fp) { 252 ep->kp = kp; 253 break; 254 } 255 } else if (ep->tdev == kp->p_tdev && 256 kp->p__pgid == kp->p_tpgid) { 257 /* 258 * Proc is in foreground of this terminal 259 */ 260 if (proc_compare(ep->kp, kp)) 261 ep->kp = kp; 262 break; 263 } 264 } 265 } 266 if ((ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) == -1 && 267 ioctl(STDERR_FILENO, TIOCGWINSZ, &ws) == -1 && 268 ioctl(STDIN_FILENO, TIOCGWINSZ, &ws) == -1) || ws.ws_col == 0) 269 ttywidth = 79; 270 else 271 ttywidth = ws.ws_col - 1; 272 argwidth = ttywidth - WUSED; 273 if (argwidth < 4) 274 argwidth = 8; 275 /* sort by idle time */ 276 if (sortidle && ehead != NULL) { 277 struct entry *from = ehead, *save; 278 279 ehead = NULL; 280 while (from != NULL) { 281 for (nextp = &ehead; 282 (*nextp) && from->idle >= (*nextp)->idle; 283 nextp = &(*nextp)->next) 284 continue; 285 save = from; 286 from = from->next; 287 save->next = *nextp; 288 *nextp = save; 289 } 290 } 291 292 if (!nflag) { 293 if (gethostname(domain, sizeof(domain)) < 0 || 294 (p = strchr(domain, '.')) == 0) 295 domain[0] = '\0'; 296 else { 297 domain[sizeof(domain) - 1] = '\0'; 298 memmove(domain, p, strlen(p) + 1); 299 } 300 } 301 302 for (ep = ehead; ep != NULL; ep = ep->next) { 303 p = *ep->utmp.ut_host ? ep->utmp.ut_host : "-"; 304 for (x = NULL, i = 0; p[i] != '\0' && i < UT_HOSTSIZE; i++) 305 if (p[i] == ':') { 306 x = &p[i]; 307 *x++ = '\0'; 308 break; 309 } 310 if (!nflag && inet_aton(p, &addr) && 311 (hp = gethostbyaddr((char *)&addr, sizeof(addr), AF_INET))) { 312 if (domain[0] != '\0') { 313 p = hp->h_name; 314 p += strlen(hp->h_name); 315 p -= strlen(domain); 316 if (p > hp->h_name && 317 strcasecmp(p, domain) == 0) 318 *p = '\0'; 319 } 320 p = hp->h_name; 321 } 322 if (x) { 323 (void)snprintf(buf, sizeof(buf), "%s:%.*s", p, 324 (int)(ep->utmp.ut_host + UT_HOSTSIZE - x), x); 325 p = buf; 326 } 327 (void)printf("%-*.*s %-2.2s %-*.*s ", 328 NAME_WIDTH, UT_NAMESIZE, ep->utmp.ut_name, 329 strncmp(ep->utmp.ut_line, "tty", 3) ? 330 ep->utmp.ut_line : ep->utmp.ut_line + 3, 331 HOST_WIDTH, HOST_WIDTH, *p ? p : "-"); 332 pr_attime(&ep->utmp.ut_time, &now); 333 pr_idle(ep->idle); 334 pr_args(ep->kp); 335 printf("\n"); 336 } 337 exit(0); 338 } 339 340 static void 341 pr_args(struct kinfo_proc2 *kp) 342 { 343 char **argv, *str; 344 int left; 345 346 if (kp == NULL) 347 goto nothing; /* XXX - can this happen? */ 348 left = argwidth; 349 argv = kvm_getargv2(kd, kp, argwidth+60); /* +60 for ftpd snip */ 350 if (argv == NULL) 351 goto nothing; 352 353 if (*argv == NULL || **argv == '\0') { 354 /* Process has zeroed argv[0], display executable name. */ 355 fmt_putc('(', &left); 356 fmt_puts(kp->p_comm, &left); 357 fmt_putc(')', &left); 358 } 359 while (*argv) { 360 /* 361 * ftp argv[0] is in the following format: 362 * ftpd: HOSTNAME: [USER/PASS: ]CMD args (ftpd) 363 */ 364 if (strncmp(*argv, "ftpd:", 5) == 0) { 365 if ((str = strchr(*argv + 5, ':')) != NULL) 366 str = strchr(str + 1, ':'); 367 if (str != NULL) { 368 if ((str[0] == ':') && isspace(str[1])) 369 str += 2; 370 fmt_puts(str, &left); 371 } else 372 fmt_puts(*argv, &left); 373 } else 374 fmt_puts(*argv, &left); 375 argv++; 376 fmt_putc(' ', &left); 377 } 378 return; 379 nothing: 380 putchar('-'); 381 } 382 383 static void 384 pr_header(time_t *nowp, int nusers) 385 { 386 double avenrun[3]; 387 time_t uptime; 388 int days, hrs, i, mins; 389 int mib[2]; 390 size_t size; 391 char buf[256]; 392 393 /* 394 * Print time of day. 395 */ 396 (void)strftime(buf, sizeof(buf) - 1, "%l:%M%p", localtime(nowp)); 397 buf[sizeof(buf) - 1] = '\0'; 398 (void)printf("%s ", buf); 399 400 /* 401 * Print how long system has been up. 402 * (Found by looking getting "boottime" from the kernel) 403 */ 404 mib[0] = CTL_KERN; 405 mib[1] = KERN_BOOTTIME; 406 size = sizeof(boottime); 407 if (sysctl(mib, 2, &boottime, &size, NULL, 0) != -1) { 408 uptime = now - boottime.tv_sec; 409 if (uptime > 59) { 410 uptime += 30; 411 days = uptime / SECSPERDAY; 412 uptime %= SECSPERDAY; 413 hrs = uptime / SECSPERHOUR; 414 uptime %= SECSPERHOUR; 415 mins = uptime / SECSPERMIN; 416 (void)printf(" up"); 417 if (days > 0) 418 (void)printf(" %d day%s,", days, 419 days > 1 ? "s" : ""); 420 if (hrs > 0 && mins > 0) 421 (void)printf(" %2d:%02d,", hrs, mins); 422 else { 423 if (hrs > 0) 424 (void)printf(" %d hr%s,", 425 hrs, hrs > 1 ? "s" : ""); 426 if (mins > 0 || (days == 0 && hrs == 0)) 427 (void)printf(" %d min%s,", 428 mins, mins != 1 ? "s" : ""); 429 } 430 } else 431 printf(" %d secs,", uptime); 432 } 433 434 /* Print number of users logged in to system */ 435 (void)printf(" %d user%s", nusers, nusers != 1 ? "s" : ""); 436 437 /* 438 * Print 1, 5, and 15 minute load averages. 439 */ 440 if (getloadavg(avenrun, sizeof(avenrun) / sizeof(avenrun[0])) == -1) 441 (void)printf(", no load average information available\n"); 442 else { 443 (void)printf(", load averages:"); 444 for (i = 0; i < (sizeof(avenrun) / sizeof(avenrun[0])); i++) { 445 if (i > 0) 446 (void)printf(","); 447 (void)printf(" %.2f", avenrun[i]); 448 } 449 (void)printf("\n"); 450 } 451 } 452 453 static struct stat * 454 ttystat(char *line) 455 { 456 static struct stat sb; 457 char ttybuf[sizeof(_PATH_DEV) + UT_LINESIZE]; 458 459 /* Note, line may not be NUL-terminated */ 460 (void)strlcpy(ttybuf, _PATH_DEV, sizeof(ttybuf)); 461 (void)strncat(ttybuf, line, sizeof(ttybuf) - 1 - strlen(ttybuf)); 462 if (stat(ttybuf, &sb)) 463 return (NULL); 464 return (&sb); 465 } 466 467 static void 468 usage(int wcmd) 469 { 470 if (wcmd) 471 (void)fprintf(stderr, 472 "usage: w [-ahi] [-M core] [-N system] [user]\n"); 473 else 474 (void)fprintf(stderr, 475 "usage: uptime\n"); 476 exit (1); 477 } 478