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 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 static char sccsid[] = "@(#)w.c 8.4 (Berkeley) 4/16/94"; 42 #endif /* not lint */ 43 44 /* 45 * w - print system status (who and what) 46 * 47 * This program is similar to the systat command on Tenex/Tops 10/20 48 * 49 */ 50 #include <sys/param.h> 51 #include <sys/time.h> 52 #include <sys/stat.h> 53 #include <sys/sysctl.h> 54 #include <sys/proc.h> 55 #include <sys/user.h> 56 #include <sys/ioctl.h> 57 #include <sys/socket.h> 58 #include <sys/tty.h> 59 60 #include <machine/cpu.h> 61 #include <netinet/in.h> 62 #include <arpa/inet.h> 63 64 #include <ctype.h> 65 #include <err.h> 66 #include <errno.h> 67 #include <fcntl.h> 68 #include <kvm.h> 69 #include <netdb.h> 70 #include <nlist.h> 71 #include <paths.h> 72 #include <stdio.h> 73 #include <stdlib.h> 74 #include <string.h> 75 #include <unistd.h> 76 #include <utmp.h> 77 #include <vis.h> 78 #include <locale.h> 79 80 #include <arpa/nameser.h> 81 #include <resolv.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 time_t uptime; /* time of last reboot & elapsed time since */ 91 int ttywidth; /* width of tty */ 92 int argwidth; /* width of tty */ 93 int header = 1; /* true if -h flag: don't print heading */ 94 int nflag; /* true if -n flag: don't convert addrs */ 95 int sortidle; /* sort bu idle time */ 96 char *sel_user; /* login of particular user selected */ 97 char domain[MAXHOSTNAMELEN]; 98 99 /* 100 * One of these per active utmp entry. 101 */ 102 struct entry { 103 struct entry *next; 104 struct utmp utmp; 105 dev_t tdev; /* dev_t of terminal */ 106 time_t idle; /* idle time of terminal in seconds */ 107 struct kinfo_proc *kp; /* `most interesting' proc */ 108 char *args; /* arg list of interesting process */ 109 } *ep, *ehead = NULL, **nextp = &ehead; 110 111 static void pr_header __P((time_t *, int)); 112 static struct stat 113 *ttystat __P((char *)); 114 static void usage __P((int)); 115 116 char *fmt_argv __P((char **, char *, int)); /* ../../bin/ps/fmt.c */ 117 118 int 119 main(argc, argv) 120 int argc; 121 char **argv; 122 { 123 extern char *__progname; 124 struct kinfo_proc *kp; 125 struct hostent *hp; 126 struct stat *stp; 127 FILE *ut; 128 u_long l; 129 size_t arglen; 130 int ch, i, nentries, nusers, wcmd; 131 char *memf, *nlistf, *p, *vis_args, *x; 132 char buf[MAXHOSTNAMELEN], errbuf[256]; 133 134 (void) setlocale(LC_ALL, ""); 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)) != EOF) 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 if (!(_res.options & RES_INIT)) 178 res_init(); 179 _res.retrans = 2; /* resolver timeout to 2 seconds per try */ 180 _res.retry = 1; /* only try once.. */ 181 182 if ((kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf)) == NULL) 183 errx(1, "%s", errbuf); 184 185 (void)time(&now); 186 if ((ut = fopen(_PATH_UTMP, "r")) == NULL) 187 err(1, "%s", _PATH_UTMP); 188 189 if (*argv) 190 sel_user = *argv; 191 192 for (nusers = 0; fread(&utmp, sizeof(utmp), 1, ut);) { 193 if (utmp.ut_name[0] == '\0') 194 continue; 195 ++nusers; 196 if (wcmd == 0 || (sel_user && 197 strncmp(utmp.ut_name, sel_user, UT_NAMESIZE) != 0)) 198 continue; 199 if ((ep = calloc(1, sizeof(struct entry))) == NULL) 200 err(1, NULL); 201 *nextp = ep; 202 nextp = &(ep->next); 203 memmove(&(ep->utmp), &utmp, sizeof(struct utmp)); 204 stp = ttystat(ep->utmp.ut_line); 205 ep->tdev = stp->st_rdev; 206 #ifdef CPU_CONSDEV 207 /* 208 * If this is the console device, attempt to ascertain 209 * the true console device dev_t. 210 */ 211 if (ep->tdev == 0) { 212 int mib[2]; 213 size_t size; 214 215 mib[0] = CTL_MACHDEP; 216 mib[1] = CPU_CONSDEV; 217 size = sizeof(dev_t); 218 (void) sysctl(mib, 2, &ep->tdev, &size, NULL, 0); 219 } 220 #endif 221 if ((ep->idle = now - stp->st_atime) < 0) 222 ep->idle = 0; 223 } 224 (void)fclose(ut); 225 226 if (header || wcmd == 0) { 227 pr_header(&now, nusers); 228 if (wcmd == 0) 229 exit (0); 230 231 #define HEADER "USER TTY FROM LOGIN@ IDLE WHAT\n" 232 #define WUSED (sizeof (HEADER) - sizeof ("WHAT\n")) 233 (void)printf(HEADER); 234 } 235 236 if ((kp = kvm_getprocs(kd, KERN_PROC_ALL, 0, &nentries)) == NULL) 237 err(1, "%s", kvm_geterr(kd)); 238 for (i = 0; i < nentries; i++, kp++) { 239 struct proc *p = &kp->kp_proc; 240 struct eproc *e; 241 242 if (p->p_stat == SIDL || p->p_stat == SZOMB) 243 continue; 244 e = &kp->kp_eproc; 245 for (ep = ehead; ep != NULL; ep = ep->next) { 246 if (ep->tdev == e->e_tdev && e->e_pgid == e->e_tpgid) { 247 /* 248 * Proc is in foreground of this terminal 249 */ 250 if (proc_compare(&ep->kp->kp_proc, p)) 251 ep->kp = kp; 252 break; 253 } 254 } 255 } 256 if ((ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) == -1 && 257 ioctl(STDERR_FILENO, TIOCGWINSZ, &ws) == -1 && 258 ioctl(STDIN_FILENO, TIOCGWINSZ, &ws) == -1) || ws.ws_col == 0) 259 ttywidth = 79; 260 else 261 ttywidth = ws.ws_col - 1; 262 argwidth = ttywidth - WUSED; 263 if (argwidth < 4) 264 argwidth = 8; 265 for (ep = ehead; ep != NULL; ep = ep->next) { 266 if (ep->kp == NULL) { 267 ep->args = "-"; 268 continue; 269 } 270 ep->args = fmt_argv(kvm_getargv(kd, ep->kp, argwidth), 271 ep->kp->kp_proc.p_comm, MAXCOMLEN); 272 if (ep->args == NULL) 273 err(1, NULL); 274 } 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) - 1) < 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 if ((vis_args = malloc(argwidth * 4 + 1)) == NULL) 302 err(1, NULL); 303 for (ep = ehead; ep != NULL; ep = ep->next) { 304 p = *ep->utmp.ut_host ? ep->utmp.ut_host : "-"; 305 if ((x = strchr(p, ':')) != NULL) 306 *x++ = '\0'; 307 if (!nflag && isdigit(*p) && 308 (long)(l = inet_addr(p)) != -1 && 309 (hp = gethostbyaddr((char *)&l, sizeof(l), AF_INET))) { 310 if (domain[0] != '\0') { 311 p = hp->h_name; 312 p += strlen(hp->h_name); 313 p -= strlen(domain); 314 if (p > hp->h_name && strcmp(p, domain) == 0) 315 *p = '\0'; 316 } 317 p = hp->h_name; 318 } 319 if (x) { 320 (void)snprintf(buf, sizeof(buf), "%s:%.*s", p, 321 ep->utmp.ut_host + UT_HOSTSIZE - x, x); 322 p = buf; 323 } 324 (void)printf("%-*.*s %-3.3s %-*.*s ", 325 UT_NAMESIZE, UT_NAMESIZE, ep->utmp.ut_name, 326 strncmp(ep->utmp.ut_line, "tty", 3) && 327 strncmp(ep->utmp.ut_line, "cua", 3) ? 328 ep->utmp.ut_line : ep->utmp.ut_line + 3, 329 UT_HOSTSIZE, UT_HOSTSIZE, *p ? p : "-"); 330 pr_attime(&ep->utmp.ut_time, &now); 331 pr_idle(ep->idle); 332 if (ep->args != NULL) { 333 arglen = strlen(ep->args); 334 strvisx(vis_args, ep->args, 335 arglen > argwidth ? argwidth : arglen, 336 VIS_TAB | VIS_NL | VIS_NOSLASH); 337 } 338 (void)printf("%.*s\n", argwidth, ep->args); 339 } 340 exit(0); 341 } 342 343 static void 344 pr_header(nowp, nusers) 345 time_t *nowp; 346 int nusers; 347 { 348 double avenrun[3]; 349 time_t uptime; 350 int days, hrs, i, mins; 351 int mib[2]; 352 size_t size; 353 char buf[256]; 354 355 /* 356 * Print time of day. 357 * 358 * SCCS forces the string manipulation below, as it replaces 359 * %, M, and % in a character string with the file name. 360 */ 361 (void)strftime(buf, sizeof(buf), 362 __CONCAT("%l:%","M%p"), localtime(nowp)); 363 (void)printf("%s ", buf); 364 365 /* 366 * Print how long system has been up. 367 * (Found by looking getting "boottime" from the kernel) 368 */ 369 mib[0] = CTL_KERN; 370 mib[1] = KERN_BOOTTIME; 371 size = sizeof(boottime); 372 if (sysctl(mib, 2, &boottime, &size, NULL, 0) != -1 && 373 boottime.tv_sec != 0) { 374 uptime = now - boottime.tv_sec; 375 uptime += 30; 376 days = uptime / 86400; 377 uptime %= 86400; 378 hrs = uptime / 3600; 379 uptime %= 3600; 380 mins = uptime / 60; 381 (void)printf(" up"); 382 if (days > 0) 383 (void)printf(" %d day%s,", days, days > 1 ? "s" : ""); 384 if (hrs > 0 && mins > 0) 385 (void)printf(" %2d:%02d,", hrs, mins); 386 else { 387 if (hrs > 0) 388 (void)printf(" %d hr%s,", 389 hrs, hrs > 1 ? "s" : ""); 390 if (mins > 0) 391 (void)printf(" %d min%s,", 392 mins, mins > 1 ? "s" : ""); 393 } 394 } 395 396 /* Print number of users logged in to system */ 397 (void)printf(" %d user%s", nusers, nusers == 1 ? "" : "s"); 398 399 /* 400 * Print 1, 5, and 15 minute load averages. 401 */ 402 if (getloadavg(avenrun, sizeof(avenrun) / sizeof(avenrun[0])) == -1) 403 (void)printf(", no load average information available\n"); 404 else { 405 (void)printf(", load averages:"); 406 for (i = 0; i < (sizeof(avenrun) / sizeof(avenrun[0])); i++) { 407 if (i > 0) 408 (void)printf(","); 409 (void)printf(" %.2f", avenrun[i]); 410 } 411 (void)printf("\n"); 412 } 413 } 414 415 static struct stat * 416 ttystat(line) 417 char *line; 418 { 419 static struct stat sb; 420 char ttybuf[MAXPATHLEN]; 421 422 (void)snprintf(ttybuf, sizeof(ttybuf), "%s/%s", _PATH_DEV, line); 423 if (stat(ttybuf, &sb)) 424 err(1, "%s", ttybuf); 425 return (&sb); 426 } 427 428 static void 429 usage(wcmd) 430 int wcmd; 431 { 432 if (wcmd) 433 (void)fprintf(stderr, 434 "usage: w: [-hin] [-M core] [-N system] [user]\n"); 435 else 436 (void)fprintf(stderr, "uptime\n"); 437 exit (1); 438 } 439