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 <tzfile.h> 76 #include <unistd.h> 77 #include <utmp.h> 78 #include <vis.h> 79 80 #include "extern.h" 81 82 struct timeval boottime; 83 struct utmp utmp; 84 struct winsize ws; 85 kvm_t *kd; 86 time_t now; /* the current time of day */ 87 time_t uptime; /* time of last reboot & elapsed time since */ 88 int ttywidth; /* width of tty */ 89 int argwidth; /* width of tty */ 90 int header = 1; /* true if -h flag: don't print heading */ 91 int nflag; /* true if -n flag: don't convert addrs */ 92 int sortidle; /* sort bu idle time */ 93 char *sel_user; /* login of particular user selected */ 94 char domain[MAXHOSTNAMELEN]; 95 96 /* 97 * One of these per active utmp entry. 98 */ 99 struct entry { 100 struct entry *next; 101 struct utmp utmp; 102 dev_t tdev; /* dev_t of terminal */ 103 time_t idle; /* idle time of terminal in seconds */ 104 struct kinfo_proc *kp; /* `most interesting' proc */ 105 } *ep, *ehead = NULL, **nextp = &ehead; 106 107 static void pr_args __P((struct kinfo_proc *)); 108 static void pr_header __P((time_t *, int)); 109 static struct stat 110 *ttystat __P((char *)); 111 static void usage __P((int)); 112 113 int 114 main(argc, argv) 115 int argc; 116 char **argv; 117 { 118 extern char *__progname; 119 struct kinfo_proc *kp; 120 struct hostent *hp; 121 struct stat *stp; 122 FILE *ut; 123 u_long l; 124 int ch, i, nentries, nusers, wcmd; 125 char *memf, *nlistf, *p, *x; 126 char buf[MAXHOSTNAMELEN], errbuf[256]; 127 128 /* Are we w(1) or uptime(1)? */ 129 p = __progname; 130 if (*p == '-') 131 p++; 132 if (*p == 'u') { 133 wcmd = 0; 134 p = ""; 135 } else { 136 wcmd = 1; 137 p = "hiflM:N:nsuw"; 138 } 139 140 memf = nlistf = NULL; 141 while ((ch = getopt(argc, argv, p)) != EOF) 142 switch (ch) { 143 case 'h': 144 header = 0; 145 break; 146 case 'i': 147 sortidle = 1; 148 break; 149 case 'M': 150 header = 0; 151 memf = optarg; 152 break; 153 case 'N': 154 nlistf = optarg; 155 break; 156 case 'n': 157 nflag = 1; 158 break; 159 case 'f': case 'l': case 's': case 'u': case 'w': 160 warnx("[-flsuw] no longer supported"); 161 /* FALLTHROUGH */ 162 case '?': 163 default: 164 usage(wcmd); 165 } 166 argc -= optind; 167 argv += optind; 168 169 if ((kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf)) == NULL) 170 errx(1, "%s", errbuf); 171 172 (void)time(&now); 173 if ((ut = fopen(_PATH_UTMP, "r")) == NULL) 174 err(1, "%s", _PATH_UTMP); 175 176 if (*argv) 177 sel_user = *argv; 178 179 for (nusers = 0; fread(&utmp, sizeof(utmp), 1, ut);) { 180 if (utmp.ut_name[0] == '\0') 181 continue; 182 ++nusers; 183 if (wcmd == 0 || (sel_user && 184 strncmp(utmp.ut_name, sel_user, UT_NAMESIZE) != 0)) 185 continue; 186 if ((ep = calloc(1, sizeof(struct entry))) == NULL) 187 err(1, NULL); 188 *nextp = ep; 189 nextp = &(ep->next); 190 memmove(&(ep->utmp), &utmp, sizeof(struct utmp)); 191 if (!(stp = ttystat(ep->utmp.ut_line))) 192 continue; 193 ep->tdev = stp->st_rdev; 194 #ifdef CPU_CONSDEV 195 /* 196 * If this is the console device, attempt to ascertain 197 * the true console device dev_t. 198 */ 199 if (ep->tdev == 0) { 200 int mib[2]; 201 size_t size; 202 203 mib[0] = CTL_MACHDEP; 204 mib[1] = CPU_CONSDEV; 205 size = sizeof(dev_t); 206 (void) sysctl(mib, 2, &ep->tdev, &size, NULL, 0); 207 } 208 #endif 209 if ((ep->idle = now - stp->st_atime) < 0) 210 ep->idle = 0; 211 } 212 (void)fclose(ut); 213 214 if (header || wcmd == 0) { 215 pr_header(&now, nusers); 216 if (wcmd == 0) 217 exit (0); 218 } 219 220 #define HEADER "USER TTY FROM LOGIN@ IDLE WHAT\n" 221 #define WUSED (sizeof (HEADER) - sizeof ("WHAT\n")) 222 (void)printf(HEADER); 223 224 if ((kp = kvm_getprocs(kd, KERN_PROC_ALL, 0, &nentries)) == NULL) 225 err(1, "%s", kvm_geterr(kd)); 226 for (i = 0; i < nentries; i++, kp++) { 227 struct proc *p = &kp->kp_proc; 228 struct eproc *e; 229 230 if (p->p_stat == SIDL || p->p_stat == SZOMB) 231 continue; 232 e = &kp->kp_eproc; 233 for (ep = ehead; ep != NULL; ep = ep->next) { 234 if (ep->tdev == e->e_tdev && e->e_pgid == e->e_tpgid) { 235 /* 236 * Proc is in foreground of this terminal 237 */ 238 if (proc_compare(&ep->kp->kp_proc, p)) 239 ep->kp = kp; 240 break; 241 } 242 } 243 } 244 if ((ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) == -1 && 245 ioctl(STDERR_FILENO, TIOCGWINSZ, &ws) == -1 && 246 ioctl(STDIN_FILENO, TIOCGWINSZ, &ws) == -1) || ws.ws_col == 0) 247 ttywidth = 79; 248 else 249 ttywidth = ws.ws_col - 1; 250 argwidth = ttywidth - WUSED; 251 if (argwidth < 4) 252 argwidth = 8; 253 /* sort by idle time */ 254 if (sortidle && ehead != NULL) { 255 struct entry *from = ehead, *save; 256 257 ehead = NULL; 258 while (from != NULL) { 259 for (nextp = &ehead; 260 (*nextp) && from->idle >= (*nextp)->idle; 261 nextp = &(*nextp)->next) 262 continue; 263 save = from; 264 from = from->next; 265 save->next = *nextp; 266 *nextp = save; 267 } 268 } 269 270 if (!nflag) 271 if (gethostname(domain, sizeof(domain) - 1) < 0 || 272 (p = strchr(domain, '.')) == 0) 273 domain[0] = '\0'; 274 else { 275 domain[sizeof(domain) - 1] = '\0'; 276 memmove(domain, p, strlen(p) + 1); 277 } 278 279 for (ep = ehead; ep != NULL; ep = ep->next) { 280 p = *ep->utmp.ut_host ? ep->utmp.ut_host : "-"; 281 if ((x = strchr(p, ':')) != NULL) 282 *x++ = '\0'; 283 if (!nflag && isdigit(*p) && 284 (long)(l = inet_addr(p)) != -1 && 285 (hp = gethostbyaddr((char *)&l, sizeof(l), AF_INET))) { 286 if (domain[0] != '\0') { 287 p = hp->h_name; 288 p += strlen(hp->h_name); 289 p -= strlen(domain); 290 if (p > hp->h_name && strcmp(p, domain) == 0) 291 *p = '\0'; 292 } 293 p = hp->h_name; 294 } 295 if (x) { 296 (void)snprintf(buf, sizeof(buf), "%s:%.*s", p, 297 ep->utmp.ut_host + UT_HOSTSIZE - x, x); 298 p = buf; 299 } 300 (void)printf("%-*.*s %-2.2s %-*.*s ", 301 UT_NAMESIZE, UT_NAMESIZE, ep->utmp.ut_name, 302 strncmp(ep->utmp.ut_line, "tty", 3) ? 303 ep->utmp.ut_line : ep->utmp.ut_line + 3, 304 UT_HOSTSIZE, UT_HOSTSIZE, *p ? p : "-"); 305 pr_attime(&ep->utmp.ut_time, &now); 306 pr_idle(ep->idle); 307 pr_args(ep->kp); 308 printf("\n"); 309 } 310 exit(0); 311 } 312 313 static void 314 pr_args(kp) 315 struct kinfo_proc *kp; 316 { 317 char **argv; 318 int left; 319 320 if (kp == 0) 321 goto nothing; 322 left = argwidth; 323 argv = kvm_getargv(kd, kp, argwidth); 324 if (argv == 0) 325 goto nothing; 326 while (*argv) { 327 fmt_puts(*argv, &left); 328 argv++; 329 fmt_putc(' ', &left); 330 } 331 return; 332 nothing: 333 putchar('-'); 334 } 335 336 static void 337 pr_header(nowp, nusers) 338 time_t *nowp; 339 int nusers; 340 { 341 double avenrun[3]; 342 time_t uptime; 343 int days, hrs, i, mins; 344 int mib[2]; 345 size_t size; 346 char buf[256]; 347 348 /* 349 * Print time of day. 350 * 351 * SCCS forces the string manipulation below, as it replaces 352 * %, M, and % in a character string with the file name. 353 */ 354 (void)strftime(buf, sizeof(buf), 355 __CONCAT("%l:%","M%p"), localtime(nowp)); 356 (void)printf("%s ", buf); 357 358 /* 359 * Print how long system has been up. 360 * (Found by looking getting "boottime" from the kernel) 361 */ 362 mib[0] = CTL_KERN; 363 mib[1] = KERN_BOOTTIME; 364 size = sizeof(boottime); 365 if (sysctl(mib, 2, &boottime, &size, NULL, 0) != -1 && 366 boottime.tv_sec != 0) { 367 uptime = now - boottime.tv_sec; 368 uptime += 30; 369 days = uptime / SECSPERDAY; 370 uptime %= SECSPERDAY; 371 hrs = uptime / SECSPERHOUR; 372 uptime %= SECSPERHOUR; 373 mins = uptime / SECSPERMIN; 374 (void)printf(" up"); 375 if (days > 0) 376 (void)printf(" %d day%s,", days, days > 1 ? "s" : ""); 377 if (hrs > 0 && mins > 0) 378 (void)printf(" %2d:%02d,", hrs, mins); 379 else { 380 if (hrs > 0) 381 (void)printf(" %d hr%s,", 382 hrs, hrs > 1 ? "s" : ""); 383 if (mins > 0) 384 (void)printf(" %d min%s,", 385 mins, mins > 1 ? "s" : ""); 386 } 387 } 388 389 /* Print number of users logged in to system */ 390 (void)printf(" %d user%s", nusers, nusers != 1 ? "s" : ""); 391 392 /* 393 * Print 1, 5, and 15 minute load averages. 394 */ 395 if (getloadavg(avenrun, sizeof(avenrun) / sizeof(avenrun[0])) == -1) 396 (void)printf(", no load average information available\n"); 397 else { 398 (void)printf(", load averages:"); 399 for (i = 0; i < (sizeof(avenrun) / sizeof(avenrun[0])); i++) { 400 if (i > 0) 401 (void)printf(","); 402 (void)printf(" %.2f", avenrun[i]); 403 } 404 (void)printf("\n"); 405 } 406 } 407 408 static struct stat * 409 ttystat(line) 410 char *line; 411 { 412 static struct stat sb; 413 char ttybuf[MAXPATHLEN]; 414 415 (void)snprintf(ttybuf, sizeof(ttybuf), "%s/%s", _PATH_DEV, line); 416 if (stat(ttybuf, &sb)) 417 return (NULL); 418 return (&sb); 419 } 420 421 static void 422 usage(wcmd) 423 int wcmd; 424 { 425 if (wcmd) 426 (void)fprintf(stderr, 427 "usage: w: [-hin] [-M core] [-N system] [user]\n"); 428 else 429 (void)fprintf(stderr, "uptime\n"); 430 exit (1); 431 } 432