1 /* $OpenBSD: w.c,v 1.39 2003/06/03 02:56:22 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 1.39 2003/06/03 02:56:22 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 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 = 1; /* 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 #define NAME_WIDTH 8 100 #define HOST_WIDTH 16 101 102 /* 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_proc *kp; /* `most interesting' proc */ 111 } *ep, *ehead = NULL, **nextp = &ehead; 112 113 static void pr_args(struct kinfo_proc *); 114 static void pr_header(time_t *, int); 115 static struct stat 116 *ttystat(char *); 117 static void usage(int); 118 119 int 120 main(int argc, char *argv[]) 121 { 122 extern char *__progname; 123 struct kinfo_proc *kp; 124 struct hostent *hp; 125 struct stat *stp; 126 FILE *ut; 127 struct in_addr addr; 128 int ch, i, nentries, nusers, wcmd; 129 char *memf, *nlistf, *p, *x; 130 char buf[MAXHOSTNAMELEN], errbuf[_POSIX2_LINE_MAX]; 131 132 /* Are we w(1) or uptime(1)? */ 133 p = __progname; 134 if (*p == '-') 135 p++; 136 if (p[0] == 'w' && p[1] == '\0') { 137 wcmd = 1; 138 p = "hiflM:N:asuw"; 139 } else if (!strcmp(p, "uptime")) { 140 wcmd = 0; 141 p = "M:N:"; 142 } else 143 errx(1, 144 "this program should be invoked only as \"w\" or \"uptime\""); 145 146 memf = nlistf = NULL; 147 while ((ch = getopt(argc, argv, p)) != -1) 148 switch (ch) { 149 case 'h': 150 header = 0; 151 break; 152 case 'i': 153 sortidle = 1; 154 break; 155 case 'M': 156 header = 0; 157 memf = optarg; 158 break; 159 case 'N': 160 nlistf = optarg; 161 break; 162 case 'a': 163 nflag = 0; 164 break; 165 case 'f': case 'l': case 's': case 'u': case 'w': 166 warnx("[-flsuw] no longer supported"); 167 /* FALLTHROUGH */ 168 case '?': 169 default: 170 usage(wcmd); 171 } 172 argc -= optind; 173 argv += optind; 174 175 if (nlistf == NULL && memf == NULL) { 176 if ((kd = kvm_openfiles(nlistf, memf, NULL, KVM_NO_FILES, 177 errbuf)) == NULL) 178 errx(1, "%s", errbuf); 179 } else { 180 if ((kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf)) == NULL) 181 errx(1, "%s", errbuf); 182 } 183 184 (void)time(&now); 185 if ((ut = fopen(_PATH_UTMP, "r")) == NULL) 186 err(1, "%s", _PATH_UTMP); 187 188 if (*argv) 189 sel_user = *argv; 190 191 for (nusers = 0; fread(&utmp, sizeof(utmp), 1, ut);) { 192 if (utmp.ut_name[0] == '\0') 193 continue; 194 ++nusers; 195 if (wcmd == 0 || (sel_user && 196 strncmp(utmp.ut_name, sel_user, UT_NAMESIZE) != 0)) 197 continue; 198 if ((ep = calloc(1, sizeof(*ep))) == NULL) 199 err(1, NULL); 200 *nextp = ep; 201 nextp = &(ep->next); 202 memcpy(&(ep->utmp), &utmp, sizeof(utmp)); 203 if (!(stp = ttystat(ep->utmp.ut_line))) 204 continue; 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 } 231 232 #define HEADER "USER TTY FROM LOGIN@ IDLE WHAT" 233 #define WUSED (sizeof(HEADER) - sizeof("WHAT")) 234 (void)puts(HEADER); 235 236 if ((kp = kvm_getprocs(kd, KERN_PROC_ALL, 0, &nentries)) == NULL) 237 errx(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 /* ftp is a special case. */ 247 if (strncmp(ep->utmp.ut_line, "ftp", 3) == 0) { 248 char pidstr[UT_LINESIZE-2]; 249 pid_t fp; 250 251 (void)strncpy(pidstr, &ep->utmp.ut_line[3], 252 sizeof(pidstr) - 1); 253 pidstr[sizeof(pidstr) - 1] = '\0'; 254 fp = (pid_t)strtol(pidstr, NULL, 10); 255 if (p->p_pid == fp) { 256 ep->kp = kp; 257 break; 258 } 259 } else if (ep->tdev == e->e_tdev && 260 e->e_pgid == e->e_tpgid) { 261 /* 262 * Proc is in foreground of this terminal 263 */ 264 if (proc_compare(&ep->kp->kp_proc, p)) 265 ep->kp = kp; 266 break; 267 } 268 } 269 } 270 if ((ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) == -1 && 271 ioctl(STDERR_FILENO, TIOCGWINSZ, &ws) == -1 && 272 ioctl(STDIN_FILENO, TIOCGWINSZ, &ws) == -1) || ws.ws_col == 0) 273 ttywidth = 79; 274 else 275 ttywidth = ws.ws_col - 1; 276 argwidth = ttywidth - WUSED; 277 if (argwidth < 4) 278 argwidth = 8; 279 /* sort by idle time */ 280 if (sortidle && ehead != NULL) { 281 struct entry *from = ehead, *save; 282 283 ehead = NULL; 284 while (from != NULL) { 285 for (nextp = &ehead; 286 (*nextp) && from->idle >= (*nextp)->idle; 287 nextp = &(*nextp)->next) 288 continue; 289 save = from; 290 from = from->next; 291 save->next = *nextp; 292 *nextp = save; 293 } 294 } 295 296 if (!nflag) { 297 if (gethostname(domain, sizeof(domain)) < 0 || 298 (p = strchr(domain, '.')) == 0) 299 domain[0] = '\0'; 300 else { 301 domain[sizeof(domain) - 1] = '\0'; 302 memmove(domain, p, strlen(p) + 1); 303 } 304 } 305 306 for (ep = ehead; ep != NULL; ep = ep->next) { 307 p = *ep->utmp.ut_host ? ep->utmp.ut_host : "-"; 308 for (x = NULL, i = 0; p[i] != '\0' && i < UT_HOSTSIZE; i++) 309 if (p[i] == ':') { 310 x = &p[i]; 311 *x++ = '\0'; 312 break; 313 } 314 if (!nflag && inet_aton(p, &addr) && 315 (hp = gethostbyaddr((char *)&addr, sizeof(addr), AF_INET))) { 316 if (domain[0] != '\0') { 317 p = hp->h_name; 318 p += strlen(hp->h_name); 319 p -= strlen(domain); 320 if (p > hp->h_name && 321 strcasecmp(p, domain) == 0) 322 *p = '\0'; 323 } 324 p = hp->h_name; 325 } 326 if (x) { 327 (void)snprintf(buf, sizeof(buf), "%s:%.*s", p, 328 (int)(ep->utmp.ut_host + UT_HOSTSIZE - x), x); 329 p = buf; 330 } 331 (void)printf("%-*.*s %-2.2s %-*.*s ", 332 NAME_WIDTH, UT_NAMESIZE, ep->utmp.ut_name, 333 strncmp(ep->utmp.ut_line, "tty", 3) ? 334 ep->utmp.ut_line : ep->utmp.ut_line + 3, 335 HOST_WIDTH, HOST_WIDTH, *p ? p : "-"); 336 pr_attime(&ep->utmp.ut_time, &now); 337 pr_idle(ep->idle); 338 pr_args(ep->kp); 339 printf("\n"); 340 } 341 exit(0); 342 } 343 344 static void 345 pr_args(struct kinfo_proc *kp) 346 { 347 char **argv, *str; 348 int left; 349 350 if (kp == NULL) 351 goto nothing; 352 left = argwidth; 353 argv = kvm_getargv(kd, kp, argwidth+60); /* +60 for ftpd snip */ 354 if (argv == NULL) 355 goto nothing; 356 357 if (*argv == NULL || **argv == '\0') { 358 /* Process has zeroed argv[0], display executable name. */ 359 fmt_putc('(', &left); 360 fmt_puts(kp->kp_proc.p_comm, &left); 361 fmt_putc(')', &left); 362 } 363 while (*argv) { 364 /* ftp is a special case... */ 365 if (strncmp(*argv, "ftpd:", 5) == 0) { 366 str = strrchr(*argv, ':'); 367 if (str != (char *)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 * SCCS forces the string manipulation below, as it replaces 397 * %, M, and % in a character string with the file name. 398 */ 399 (void)strftime(buf, sizeof(buf) - 1, 400 __CONCAT("%l:%","M%p"), localtime(nowp)); 401 buf[sizeof(buf) - 1] = '\0'; 402 (void)printf("%s ", buf); 403 404 /* 405 * Print how long system has been up. 406 * (Found by looking getting "boottime" from the kernel) 407 */ 408 mib[0] = CTL_KERN; 409 mib[1] = KERN_BOOTTIME; 410 size = sizeof(boottime); 411 if (sysctl(mib, 2, &boottime, &size, NULL, 0) != -1) { 412 uptime = now - boottime.tv_sec; 413 if (uptime > 59) { 414 uptime += 30; 415 days = uptime / SECSPERDAY; 416 uptime %= SECSPERDAY; 417 hrs = uptime / SECSPERHOUR; 418 uptime %= SECSPERHOUR; 419 mins = uptime / SECSPERMIN; 420 (void)printf(" up"); 421 if (days > 0) 422 (void)printf(" %d day%s,", days, 423 days > 1 ? "s" : ""); 424 if (hrs > 0 && mins > 0) 425 (void)printf(" %2d:%02d,", hrs, mins); 426 else { 427 if (hrs > 0) 428 (void)printf(" %d hr%s,", 429 hrs, hrs > 1 ? "s" : ""); 430 if (mins > 0 || (days == 0 && hrs == 0)) 431 (void)printf(" %d min%s,", 432 mins, mins != 1 ? "s" : ""); 433 } 434 } else 435 printf(" %d secs,", uptime); 436 } 437 438 /* Print number of users logged in to system */ 439 (void)printf(" %d user%s", nusers, nusers != 1 ? "s" : ""); 440 441 /* 442 * Print 1, 5, and 15 minute load averages. 443 */ 444 if (getloadavg(avenrun, sizeof(avenrun) / sizeof(avenrun[0])) == -1) 445 (void)printf(", no load average information available\n"); 446 else { 447 (void)printf(", load averages:"); 448 for (i = 0; i < (sizeof(avenrun) / sizeof(avenrun[0])); i++) { 449 if (i > 0) 450 (void)printf(","); 451 (void)printf(" %.2f", avenrun[i]); 452 } 453 (void)printf("\n"); 454 } 455 } 456 457 static struct stat * 458 ttystat(char *line) 459 { 460 static struct stat sb; 461 char ttybuf[sizeof(_PATH_DEV) + UT_LINESIZE]; 462 463 /* Note, line may not be NUL-terminated */ 464 (void)strlcpy(ttybuf, _PATH_DEV, sizeof(ttybuf)); 465 (void)strncat(ttybuf, line, sizeof(ttybuf) - 1 - strlen(ttybuf)); 466 if (stat(ttybuf, &sb)) 467 return (NULL); 468 return (&sb); 469 } 470 471 static void 472 usage(int wcmd) 473 { 474 if (wcmd) 475 (void)fprintf(stderr, 476 "usage: w [-hia] [-M core] [-N system] [user]\n"); 477 else 478 (void)fprintf(stderr, 479 "usage: uptime [-M core] [-N system]\n"); 480 exit (1); 481 } 482