1 /* $NetBSD: w.c,v 1.27 1997/10/20 03:08:45 lukem 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 1.27 1997/10/20 03:08:45 lukem 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/time.h> 58 #include <sys/stat.h> 59 #include <sys/sysctl.h> 60 #include <sys/proc.h> 61 #include <sys/user.h> 62 #include <sys/ioctl.h> 63 #include <sys/socket.h> 64 #include <sys/tty.h> 65 66 #include <machine/cpu.h> 67 #include <netinet/in.h> 68 #include <arpa/inet.h> 69 70 #include <ctype.h> 71 #include <err.h> 72 #include <errno.h> 73 #include <fcntl.h> 74 #include <kvm.h> 75 #include <limits.h> 76 #include <netdb.h> 77 #include <nlist.h> 78 #include <paths.h> 79 #include <stdio.h> 80 #include <stdlib.h> 81 #include <string.h> 82 #include <tzfile.h> 83 #include <unistd.h> 84 #include <utmp.h> 85 #include <vis.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 sortidle; /* sort bu idle time */ 100 char *sel_user; /* login of particular user selected */ 101 char domain[MAXHOSTNAMELEN]; 102 103 /* 104 * One of these per active utmp entry. 105 */ 106 struct entry { 107 struct entry *next; 108 struct utmp utmp; 109 dev_t tdev; /* dev_t of terminal */ 110 time_t idle; /* idle time of terminal in seconds */ 111 struct kinfo_proc *kp; /* `most interesting' proc */ 112 } *ep, *ehead = NULL, **nextp = &ehead; 113 114 static void pr_args __P((struct kinfo_proc *)); 115 static void pr_header __P((time_t *, int)); 116 static struct stat 117 *ttystat __P((char *)); 118 static void usage __P((int)); 119 int main __P((int, char **)); 120 121 int 122 main(argc, argv) 123 int argc; 124 char **argv; 125 { 126 extern char *__progname; 127 struct kinfo_proc *kp; 128 struct hostent *hp; 129 struct stat *stp; 130 FILE *ut; 131 struct in_addr l; 132 int ch, i, nentries, nusers, wcmd; 133 char *memf, *nlistf, *p, *x; 134 char buf[MAXHOSTNAMELEN], errbuf[_POSIX2_LINE_MAX]; 135 136 /* Are we w(1) or uptime(1)? */ 137 p = __progname; 138 if (*p == '-') 139 p++; 140 if (*p == 'u') { 141 wcmd = 0; 142 p = ""; 143 } else { 144 wcmd = 1; 145 p = "hiflM:N:nsuw"; 146 } 147 148 memf = nlistf = NULL; 149 while ((ch = getopt(argc, argv, p)) != -1) 150 switch (ch) { 151 case 'h': 152 header = 0; 153 break; 154 case 'i': 155 sortidle = 1; 156 break; 157 case 'M': 158 header = 0; 159 memf = optarg; 160 break; 161 case 'N': 162 nlistf = optarg; 163 break; 164 case 'n': 165 nflag = 1; 166 break; 167 case 'f': case 'l': case 's': case 'u': case 'w': 168 warnx("[-flsuw] no longer supported"); 169 /* FALLTHROUGH */ 170 case '?': 171 default: 172 usage(wcmd); 173 } 174 argc -= optind; 175 argv += optind; 176 177 /* 178 * Discard setgid privelidges if not the running kernel so that 179 * bad guys can't print interesting stuff from kernel memory. 180 */ 181 if (nlistf != NULL || memf != NULL) 182 setgid(getgid()); 183 184 if ((kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf)) == NULL) 185 errx(1, "%s", errbuf); 186 187 (void)time(&now); 188 if ((ut = fopen(_PATH_UTMP, "r")) == NULL) 189 err(1, "%s", _PATH_UTMP); 190 191 if (*argv) 192 sel_user = *argv; 193 194 for (nusers = 0; fread(&utmp, sizeof(utmp), 1, ut);) { 195 if (utmp.ut_name[0] == '\0') 196 continue; 197 ++nusers; 198 if (wcmd == 0 || (sel_user && 199 strncmp(utmp.ut_name, sel_user, UT_NAMESIZE) != 0)) 200 continue; 201 if ((ep = calloc(1, sizeof(struct entry))) == NULL) 202 err(1, "%s", ""); 203 *nextp = ep; 204 nextp = &(ep->next); 205 memmove(&(ep->utmp), &utmp, sizeof(struct utmp)); 206 if (!(stp = ttystat(ep->utmp.ut_line))) 207 continue; 208 ep->tdev = stp->st_rdev; 209 #ifdef CPU_CONSDEV 210 /* 211 * If this is the console device, attempt to ascertain 212 * the true console device dev_t. 213 */ 214 if (ep->tdev == 0) { 215 int mib[2]; 216 size_t size; 217 218 mib[0] = CTL_MACHDEP; 219 mib[1] = CPU_CONSDEV; 220 size = sizeof(dev_t); 221 (void) sysctl(mib, 2, &ep->tdev, &size, NULL, 0); 222 } 223 #endif 224 if ((ep->idle = now - stp->st_atime) < 0) 225 ep->idle = 0; 226 } 227 (void)fclose(ut); 228 229 if (header || wcmd == 0) { 230 pr_header(&now, nusers); 231 if (wcmd == 0) 232 exit (0); 233 } 234 235 #define HEADER "USER TTY FROM LOGIN@ IDLE WHAT\n" 236 #define WUSED (sizeof (HEADER) - sizeof ("WHAT\n")) 237 (void)printf(HEADER); 238 239 if ((kp = kvm_getprocs(kd, KERN_PROC_ALL, 0, &nentries)) == NULL) 240 errx(1, "%s", kvm_geterr(kd)); 241 for (i = 0; i < nentries; i++, kp++) { 242 struct proc *p = &kp->kp_proc; 243 struct eproc *e; 244 245 if (p->p_stat == SIDL || p->p_stat == SZOMB) 246 continue; 247 e = &kp->kp_eproc; 248 for (ep = ehead; ep != NULL; ep = ep->next) { 249 if (ep->tdev == e->e_tdev && e->e_pgid == e->e_tpgid) { 250 /* 251 * Proc is in foreground of this terminal 252 */ 253 if (proc_compare(&ep->kp->kp_proc, p)) 254 ep->kp = kp; 255 break; 256 } 257 } 258 } 259 if ((ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) == -1 && 260 ioctl(STDERR_FILENO, TIOCGWINSZ, &ws) == -1 && 261 ioctl(STDIN_FILENO, TIOCGWINSZ, &ws) == -1) || ws.ws_col == 0) 262 ttywidth = 79; 263 else 264 ttywidth = ws.ws_col - 1; 265 argwidth = ttywidth - WUSED; 266 if (argwidth < 4) 267 argwidth = 8; 268 /* sort by idle time */ 269 if (sortidle && ehead != NULL) { 270 struct entry *from = ehead, *save; 271 272 ehead = NULL; 273 while (from != NULL) { 274 for (nextp = &ehead; 275 (*nextp) && from->idle >= (*nextp)->idle; 276 nextp = &(*nextp)->next) 277 continue; 278 save = from; 279 from = from->next; 280 save->next = *nextp; 281 *nextp = save; 282 } 283 } 284 285 if (!nflag) 286 if (gethostname(domain, sizeof(domain) - 1) < 0 || 287 (p = strchr(domain, '.')) == 0) 288 domain[0] = '\0'; 289 else { 290 domain[sizeof(domain) - 1] = '\0'; 291 memmove(domain, p, strlen(p) + 1); 292 } 293 294 for (ep = ehead; ep != NULL; ep = ep->next) { 295 p = *ep->utmp.ut_host ? ep->utmp.ut_host : "-"; 296 for (x = p; x < p + UT_HOSTSIZE; x++) 297 if (*x == '\0' || *x == ':') 298 break; 299 if (x == p + UT_HOSTSIZE || *x != ':') 300 x = NULL; 301 else 302 *x++ = '\0'; 303 304 if (!nflag && inet_aton(p, &l) && 305 (hp = gethostbyaddr((char *)&l, sizeof(l), AF_INET))) { 306 if (domain[0] != '\0') { 307 p = hp->h_name; 308 p += strlen(hp->h_name); 309 p -= strlen(domain); 310 if (p > hp->h_name && strcmp(p, domain) == 0) 311 *p = '\0'; 312 } 313 p = hp->h_name; 314 } 315 if (x) { 316 (void)snprintf(buf, sizeof(buf), "%s:%.*s", p, 317 (int)(ep->utmp.ut_host + UT_HOSTSIZE - x), x); 318 p = buf; 319 } 320 (void)printf("%-*.*s %-2.2s %-*.*s ", 321 UT_NAMESIZE, UT_NAMESIZE, ep->utmp.ut_name, 322 strncmp(ep->utmp.ut_line, "tty", 3) ? 323 ep->utmp.ut_line : ep->utmp.ut_line + 3, 324 UT_HOSTSIZE, UT_HOSTSIZE, *p ? p : "-"); 325 pr_attime(&ep->utmp.ut_time, &now); 326 pr_idle(ep->idle); 327 pr_args(ep->kp); 328 printf("\n"); 329 } 330 exit(0); 331 } 332 333 static void 334 pr_args(kp) 335 struct kinfo_proc *kp; 336 { 337 char **argv; 338 int left; 339 340 if (kp == 0) 341 goto nothing; 342 left = argwidth; 343 argv = kvm_getargv(kd, kp, argwidth); 344 if (argv == 0) 345 goto nothing; 346 while (*argv) { 347 fmt_puts(*argv, &left); 348 argv++; 349 fmt_putc(' ', &left); 350 } 351 return; 352 nothing: 353 putchar('-'); 354 } 355 356 static void 357 pr_header(nowp, nusers) 358 time_t *nowp; 359 int nusers; 360 { 361 double avenrun[3]; 362 time_t uptime; 363 int days, hrs, i, mins; 364 int mib[2]; 365 size_t size; 366 char buf[256]; 367 368 /* 369 * Print time of day. 370 * 371 * SCCS forces the string manipulation below, as it replaces 372 * %, M, and % in a character string with the file name. 373 */ 374 (void)strftime(buf, sizeof(buf), 375 __CONCAT("%l:%","M%p"), localtime(nowp)); 376 buf[sizeof(buf) - 1] = '\0'; 377 (void)printf("%s ", buf); 378 379 /* 380 * Print how long system has been up. 381 * (Found by looking getting "boottime" from the kernel) 382 */ 383 mib[0] = CTL_KERN; 384 mib[1] = KERN_BOOTTIME; 385 size = sizeof(boottime); 386 if (sysctl(mib, 2, &boottime, &size, NULL, 0) != -1 && 387 boottime.tv_sec != 0) { 388 uptime = now - boottime.tv_sec; 389 uptime += 30; 390 if (uptime > SECSPERMIN) { 391 days = uptime / SECSPERDAY; 392 uptime %= SECSPERDAY; 393 hrs = uptime / SECSPERHOUR; 394 uptime %= SECSPERHOUR; 395 mins = uptime / SECSPERMIN; 396 (void)printf(" up"); 397 if (days > 0) 398 (void)printf(" %d day%s,", days, 399 days > 1 ? "s" : ""); 400 if (hrs > 0 && mins > 0) 401 (void)printf(" %2d:%02d,", hrs, mins); 402 else { 403 if (hrs > 0) 404 (void)printf(" %d hr%s,", 405 hrs, hrs > 1 ? "s" : ""); 406 if (mins > 0) 407 (void)printf(" %d min%s,", 408 mins, mins > 1 ? "s" : ""); 409 } 410 } 411 } 412 413 /* Print number of users logged in to system */ 414 (void)printf(" %d user%s", nusers, nusers != 1 ? "s" : ""); 415 416 /* 417 * Print 1, 5, and 15 minute load averages. 418 */ 419 if (getloadavg(avenrun, sizeof(avenrun) / sizeof(avenrun[0])) == -1) 420 (void)printf(", no load average information available\n"); 421 else { 422 (void)printf(", load averages:"); 423 for (i = 0; i < (sizeof(avenrun) / sizeof(avenrun[0])); i++) { 424 if (i > 0) 425 (void)printf(","); 426 (void)printf(" %.2f", avenrun[i]); 427 } 428 (void)printf("\n"); 429 } 430 } 431 432 static struct stat * 433 ttystat(line) 434 char *line; 435 { 436 static struct stat sb; 437 char ttybuf[MAXPATHLEN]; 438 439 (void)snprintf(ttybuf, sizeof(ttybuf), "%s/%s", _PATH_DEV, line); 440 if (stat(ttybuf, &sb)) 441 return (NULL); 442 return (&sb); 443 } 444 445 static void 446 usage(wcmd) 447 int wcmd; 448 { 449 if (wcmd) 450 (void)fprintf(stderr, 451 "usage: w: [-hin] [-M core] [-N system] [user]\n"); 452 else 453 (void)fprintf(stderr, "uptime\n"); 454 exit (1); 455 } 456