w.c revision 1.35
1 /* $NetBSD: w.c,v 1.35 2000/05/26 03:10:31 simonb 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 1.35 2000/05/26 03:10:31 simonb 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 65 #include <netinet/in.h> 66 #include <arpa/inet.h> 67 68 #include <ctype.h> 69 #include <err.h> 70 #include <errno.h> 71 #include <fcntl.h> 72 #include <kvm.h> 73 #include <limits.h> 74 #include <netdb.h> 75 #include <nlist.h> 76 #include <paths.h> 77 #include <stdio.h> 78 #include <stdlib.h> 79 #include <string.h> 80 #include <time.h> 81 #include <tzfile.h> 82 #include <unistd.h> 83 #include <utmp.h> 84 #include <vis.h> 85 86 #include "extern.h" 87 88 struct timeval boottime; 89 struct utmp utmp; 90 struct winsize ws; 91 kvm_t *kd; 92 time_t now; /* the current time of day */ 93 time_t uptime; /* time of last reboot & elapsed time since */ 94 int ttywidth; /* width of tty */ 95 int argwidth; /* width of tty */ 96 int header = 1; /* true if -h flag: don't print heading */ 97 int nflag; /* true if -n flag: don't convert addrs */ 98 int sortidle; /* sort bu idle time */ 99 char *sel_user; /* login of particular user selected */ 100 char domain[MAXHOSTNAMELEN + 1]; 101 102 /* 103 * One of these per active utmp entry. 104 */ 105 struct entry { 106 struct entry *next; 107 struct utmp utmp; 108 dev_t tdev; /* dev_t of terminal */ 109 time_t idle; /* idle time of terminal in seconds */ 110 struct kinfo_proc2 *kp; /* `most interesting' proc */ 111 } *ep, *ehead = NULL, **nextp = &ehead; 112 113 static void pr_args __P((struct kinfo_proc2 *)); 114 static void pr_header __P((time_t *, int)); 115 static struct stat 116 *ttystat __P((char *)); 117 static void usage __P((int)); 118 int main __P((int, char **)); 119 120 int 121 main(argc, argv) 122 int argc; 123 char **argv; 124 { 125 extern char *__progname; 126 struct kinfo_proc2 *kp; 127 struct hostent *hp; 128 struct stat *stp; 129 FILE *ut; 130 struct in_addr l; 131 int ch, i, nentries, nusers, wcmd; 132 char *memf, *nlistf, *p, *x; 133 char buf[MAXHOSTNAMELEN], errbuf[_POSIX2_LINE_MAX]; 134 135 /* Are we w(1) or uptime(1)? */ 136 p = __progname; 137 if (*p == '-') 138 p++; 139 if (*p == 'u') { 140 wcmd = 0; 141 p = ""; 142 } else { 143 wcmd = 1; 144 p = "hiflM:N:nsuw"; 145 } 146 147 memf = nlistf = NULL; 148 while ((ch = getopt(argc, argv, p)) != -1) 149 switch (ch) { 150 case 'h': 151 header = 0; 152 break; 153 case 'i': 154 sortidle = 1; 155 break; 156 case 'M': 157 header = 0; 158 memf = optarg; 159 break; 160 case 'N': 161 nlistf = optarg; 162 break; 163 case 'n': 164 nflag = 1; 165 break; 166 case 'f': case 'l': case 's': case 'u': case 'w': 167 warnx("[-flsuw] no longer supported"); 168 /* FALLTHROUGH */ 169 case '?': 170 default: 171 usage(wcmd); 172 } 173 argc -= optind; 174 argv += optind; 175 176 if ((kd = kvm_openfiles(nlistf, memf, NULL, 177 memf == NULL ? KVM_NO_FILES : O_RDONLY, errbuf)) == NULL) 178 errx(1, "%s", errbuf); 179 180 (void)time(&now); 181 if ((ut = fopen(_PATH_UTMP, "r")) == NULL) 182 err(1, "%s", _PATH_UTMP); 183 184 if (*argv) 185 sel_user = *argv; 186 187 for (nusers = 0; fread(&utmp, sizeof(utmp), 1, ut);) { 188 if (utmp.ut_name[0] == '\0') 189 continue; 190 ++nusers; 191 if (wcmd == 0 || (sel_user && 192 strncmp(utmp.ut_name, sel_user, UT_NAMESIZE) != 0)) 193 continue; 194 if ((ep = calloc(1, sizeof(struct entry))) == NULL) 195 err(1, NULL); 196 *nextp = ep; 197 nextp = &(ep->next); 198 memmove(&(ep->utmp), &utmp, sizeof(struct utmp)); 199 if (!(stp = ttystat(ep->utmp.ut_line))) 200 continue; 201 ep->tdev = stp->st_rdev; 202 #ifdef CPU_CONSDEV 203 /* 204 * If this is the console device, attempt to ascertain 205 * the true console device dev_t. 206 */ 207 if (ep->tdev == 0) { 208 int mib[2]; 209 size_t size; 210 211 mib[0] = CTL_MACHDEP; 212 mib[1] = CPU_CONSDEV; 213 size = sizeof(dev_t); 214 (void) sysctl(mib, 2, &ep->tdev, &size, NULL, 0); 215 } 216 #endif 217 if ((ep->idle = now - stp->st_atime) < 0) 218 ep->idle = 0; 219 } 220 (void)fclose(ut); 221 222 if (header || wcmd == 0) { 223 pr_header(&now, nusers); 224 if (wcmd == 0) 225 exit (0); 226 } 227 228 #define HEADER "USER TTY FROM LOGIN@ IDLE WHAT\n" 229 #define WUSED (sizeof (HEADER) - sizeof ("WHAT\n")) 230 (void)printf(HEADER); 231 232 if ((kp = kvm_getproc2(kd, KERN_PROC_ALL, 0, sizeof(struct kinfo_proc), 233 &nentries)) == NULL) 234 errx(1, "%s", kvm_geterr(kd)); 235 for (i = 0; i < nentries; i++, kp++) { 236 237 if (kp->p_stat == SIDL || kp->p_stat == SZOMB) 238 continue; 239 for (ep = ehead; ep != NULL; ep = ep->next) { 240 if (ep->tdev == kp->p_tdev && 241 kp->p__pgid == kp->p_tpgid) { 242 /* 243 * Proc is in foreground of this terminal 244 */ 245 if (proc_compare(ep->kp, kp)) 246 ep->kp = kp; 247 break; 248 } 249 } 250 } 251 if ((ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) == -1 && 252 ioctl(STDERR_FILENO, TIOCGWINSZ, &ws) == -1 && 253 ioctl(STDIN_FILENO, TIOCGWINSZ, &ws) == -1) || ws.ws_col == 0) 254 ttywidth = 79; 255 else 256 ttywidth = ws.ws_col - 1; 257 argwidth = ttywidth - WUSED; 258 if (argwidth < 4) 259 argwidth = 8; 260 /* sort by idle time */ 261 if (sortidle && ehead != NULL) { 262 struct entry *from = ehead, *save; 263 264 ehead = NULL; 265 while (from != NULL) { 266 for (nextp = &ehead; 267 (*nextp) && from->idle >= (*nextp)->idle; 268 nextp = &(*nextp)->next) 269 continue; 270 save = from; 271 from = from->next; 272 save->next = *nextp; 273 *nextp = save; 274 } 275 } 276 277 if (!nflag) { 278 int rv; 279 280 rv = gethostname(domain, sizeof(domain)); 281 domain[sizeof(domain) - 1] = '\0'; 282 if (rv < 0 || (p = strchr(domain, '.')) == 0) 283 domain[0] = '\0'; 284 else 285 memmove(domain, p, strlen(p) + 1); 286 } 287 288 for (ep = ehead; ep != NULL; ep = ep->next) { 289 p = *ep->utmp.ut_host ? ep->utmp.ut_host : "-"; 290 for (x = p; x < p + UT_HOSTSIZE; x++) 291 if (*x == '\0' || *x == ':') 292 break; 293 if (x == p + UT_HOSTSIZE || *x != ':') 294 x = NULL; 295 else 296 *x++ = '\0'; 297 298 if (!nflag && inet_aton(p, &l) && 299 (hp = gethostbyaddr((char *)&l, sizeof(l), AF_INET))) { 300 if (domain[0] != '\0') { 301 p = hp->h_name; 302 p += strlen(hp->h_name); 303 p -= strlen(domain); 304 if (p > hp->h_name && strcmp(p, domain) == 0) 305 *p = '\0'; 306 } 307 p = hp->h_name; 308 } 309 if (x) { 310 (void)snprintf(buf, sizeof(buf), "%s:%.*s", p, 311 (int)(ep->utmp.ut_host + UT_HOSTSIZE - x), x); 312 p = buf; 313 } 314 (void)printf("%-*.*s %-2.2s %-*.*s ", 315 UT_NAMESIZE, UT_NAMESIZE, ep->utmp.ut_name, 316 (strncmp(ep->utmp.ut_line, "tty", 3) && 317 strncmp(ep->utmp.ut_line, "dty", 3)) ? 318 ep->utmp.ut_line : ep->utmp.ut_line + 3, 319 UT_HOSTSIZE, UT_HOSTSIZE, *p ? p : "-"); 320 pr_attime(&ep->utmp.ut_time, &now); 321 pr_idle(ep->idle); 322 pr_args(ep->kp); 323 printf("\n"); 324 } 325 exit(0); 326 } 327 328 static void 329 pr_args(kp) 330 struct kinfo_proc2 *kp; 331 { 332 char **argv; 333 int left; 334 335 if (kp == 0) 336 goto nothing; 337 left = argwidth; 338 argv = kvm_getargv2(kd, kp, argwidth); 339 if (argv == 0) 340 goto nothing; 341 while (*argv) { 342 fmt_puts(*argv, &left); 343 argv++; 344 fmt_putc(' ', &left); 345 } 346 return; 347 nothing: 348 putchar('-'); 349 } 350 351 static void 352 pr_header(nowp, nusers) 353 time_t *nowp; 354 int nusers; 355 { 356 double avenrun[3]; 357 time_t uptime; 358 int days, hrs, i, mins; 359 int mib[2]; 360 size_t size; 361 char buf[256]; 362 363 /* 364 * Print time of day. 365 * 366 * SCCS forces the string manipulation below, as it replaces 367 * %, M, and % in a character string with the file name. 368 */ 369 (void)strftime(buf, sizeof(buf), 370 __CONCAT("%l:%","M%p"), localtime(nowp)); 371 buf[sizeof(buf) - 1] = '\0'; 372 (void)printf("%s ", buf); 373 374 /* 375 * Print how long system has been up. 376 * (Found by looking getting "boottime" from the kernel) 377 */ 378 mib[0] = CTL_KERN; 379 mib[1] = KERN_BOOTTIME; 380 size = sizeof(boottime); 381 if (sysctl(mib, 2, &boottime, &size, NULL, 0) != -1 && 382 boottime.tv_sec != 0) { 383 uptime = now - boottime.tv_sec; 384 uptime += 30; 385 if (uptime > SECSPERMIN) { 386 days = uptime / SECSPERDAY; 387 uptime %= SECSPERDAY; 388 hrs = uptime / SECSPERHOUR; 389 uptime %= SECSPERHOUR; 390 mins = uptime / SECSPERMIN; 391 (void)printf(" up"); 392 if (days > 0) 393 (void)printf(" %d day%s,", days, 394 days > 1 ? "s" : ""); 395 if (hrs > 0 && mins > 0) 396 (void)printf(" %2d:%02d,", hrs, mins); 397 else { 398 if (hrs > 0) 399 (void)printf(" %d hr%s,", 400 hrs, hrs > 1 ? "s" : ""); 401 if (mins > 0) 402 (void)printf(" %d min%s,", 403 mins, mins > 1 ? "s" : ""); 404 } 405 } 406 } 407 408 /* Print number of users logged in to system */ 409 (void)printf(" %d user%s", nusers, nusers != 1 ? "s" : ""); 410 411 /* 412 * Print 1, 5, and 15 minute load averages. 413 */ 414 if (getloadavg(avenrun, sizeof(avenrun) / sizeof(avenrun[0])) == -1) 415 (void)printf(", no load average information available\n"); 416 else { 417 (void)printf(", load averages:"); 418 for (i = 0; i < (sizeof(avenrun) / sizeof(avenrun[0])); i++) { 419 if (i > 0) 420 (void)printf(","); 421 (void)printf(" %.2f", avenrun[i]); 422 } 423 (void)printf("\n"); 424 } 425 } 426 427 static struct stat * 428 ttystat(line) 429 char *line; 430 { 431 static struct stat sb; 432 char ttybuf[MAXPATHLEN]; 433 434 (void)snprintf(ttybuf, sizeof(ttybuf), "%s/%s", _PATH_DEV, line); 435 if (stat(ttybuf, &sb)) 436 return (NULL); 437 return (&sb); 438 } 439 440 static void 441 usage(wcmd) 442 int wcmd; 443 { 444 if (wcmd) 445 (void)fprintf(stderr, 446 "usage: w: [-hin] [-M core] [-N system] [user]\n"); 447 else 448 (void)fprintf(stderr, "uptime\n"); 449 exit(1); 450 } 451
Indexes created Wed Sep 24 15:09:51 GMT 2025