w.c revision 42050
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 35static const 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#if 0 42static char sccsid[] = "@(#)w.c 8.4 (Berkeley) 4/16/94"; 43#endif 44static const char rcsid[] = 45 "$Id: w.c,v 1.29 1998/11/09 01:19:30 steve Exp $"; 46#endif /* not lint */ 47 48/* 49 * w - print system status (who and what) 50 * 51 * This program is similar to the systat command on Tenex/Tops 10/20 52 * 53 */ 54#include <sys/param.h> 55#include <sys/time.h> 56#include <sys/stat.h> 57#include <sys/sysctl.h> 58#include <sys/proc.h> 59#include <sys/user.h> 60#include <sys/ioctl.h> 61#include <sys/socket.h> 62#include <sys/tty.h> 63 64#include <machine/cpu.h> 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 <netdb.h> 74#include <nlist.h> 75#include <paths.h> 76#include <stdio.h> 77#include <stdlib.h> 78#include <string.h> 79#include <unistd.h> 80#include <utmp.h> 81#include <vis.h> 82#include <locale.h> 83 84#include <arpa/nameser.h> 85#include <resolv.h> 86 87#include "extern.h" 88 89struct timeval boottime; 90struct utmp utmp; 91struct winsize ws; 92kvm_t *kd; 93time_t now; /* the current time of day */ 94time_t uptime; /* time of last reboot & elapsed time since */ 95int ttywidth; /* width of tty */ 96int argwidth; /* width of tty */ 97int header = 1; /* true if -h flag: don't print heading */ 98int nflag; /* true if -n flag: don't convert addrs */ 99int dflag; /* true if -d flag: output debug info */ 100int sortidle; /* sort bu idle time */ 101char *sel_user; /* login of particular user selected */ 102char domain[MAXHOSTNAMELEN]; 103 104/* 105 * One of these per active utmp entry. 106 */ 107struct entry { 108 struct entry *next; 109 struct utmp utmp; 110 dev_t tdev; /* dev_t of terminal */ 111 time_t idle; /* idle time of terminal in seconds */ 112 struct kinfo_proc *kp; /* `most interesting' proc */ 113 char *args; /* arg list of interesting process */ 114 struct kinfo_proc *dkp; /* debug option proc list */ 115} *ep, *ehead = NULL, **nextp = &ehead; 116 117static void pr_header __P((time_t *, int)); 118static struct stat 119 *ttystat __P((char *)); 120static void usage __P((int)); 121 122char *fmt_argv __P((char **, char *, int)); /* ../../bin/ps/fmt.c */ 123 124int 125main(argc, argv) 126 int argc; 127 char **argv; 128{ 129 extern char *__progname; 130 struct kinfo_proc *kp; 131 struct kinfo_proc *dkp; 132 struct hostent *hp; 133 struct stat *stp; 134 FILE *ut; 135 u_long l; 136 size_t arglen; 137 int ch, i, nentries, nusers, wcmd, longidle; 138 char *memf, *nlistf, *p, *x; 139 char buf[MAXHOSTNAMELEN], errbuf[256]; 140 141 (void) setlocale(LC_ALL, ""); 142 143 /* Are we w(1) or uptime(1)? */ 144 if (strstr(argv[0], "uptime")) { 145 wcmd = 0; 146 p = ""; 147 } else { 148 wcmd = 1; 149 p = "dhiflM:N:nsuw"; 150 } 151 152 memf = nlistf = NULL; 153 while ((ch = getopt(argc, argv, p)) != -1) 154 switch (ch) { 155 case 'd': 156 dflag = 1; 157 break; 158 case 'h': 159 header = 0; 160 break; 161 case 'i': 162 sortidle = 1; 163 break; 164 case 'M': 165 header = 0; 166 memf = optarg; 167 break; 168 case 'N': 169 nlistf = optarg; 170 break; 171 case 'n': 172 nflag = 1; 173 break; 174 case 'f': case 'l': case 's': case 'u': case 'w': 175 warnx("[-flsuw] no longer supported"); 176 /* FALLTHROUGH */ 177 case '?': 178 default: 179 usage(wcmd); 180 } 181 argc -= optind; 182 argv += optind; 183 184 if (!(_res.options & RES_INIT)) 185 res_init(); 186 _res.retrans = 2; /* resolver timeout to 2 seconds per try */ 187 _res.retry = 1; /* only try once.. */ 188 189 /* 190 * Discard setgid privileges if not the running kernel so that bad 191 * guys can't print interesting stuff from kernel memory. 192 */ 193 if (nlistf != NULL || memf != NULL) 194 setgid(getgid()); 195 196 if ((kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf)) == NULL) 197 errx(1, "%s", errbuf); 198 199 (void)time(&now); 200 if ((ut = fopen(_PATH_UTMP, "r")) == NULL) 201 err(1, "%s", _PATH_UTMP); 202 203 if (*argv) 204 sel_user = *argv; 205 206 for (nusers = 0; fread(&utmp, sizeof(utmp), 1, ut);) { 207 if (utmp.ut_name[0] == '\0') 208 continue; 209 if (!(stp = ttystat(utmp.ut_line))) /* corrupted record */ 210 continue; 211 ++nusers; 212 if (wcmd == 0 || (sel_user && 213 strncmp(utmp.ut_name, sel_user, UT_NAMESIZE) != 0)) 214 continue; 215 if ((ep = calloc(1, sizeof(struct entry))) == NULL) 216 errx(1, "calloc"); 217 *nextp = ep; 218 nextp = &(ep->next); 219 memmove(&(ep->utmp), &utmp, sizeof(struct utmp)); 220 ep->tdev = stp->st_rdev; 221#ifdef CPU_CONSDEV 222 /* 223 * If this is the console device, attempt to ascertain 224 * the true console device dev_t. 225 */ 226 if (ep->tdev == 0) { 227 int mib[2]; 228 size_t size; 229 230 mib[0] = CTL_MACHDEP; 231 mib[1] = CPU_CONSDEV; 232 size = sizeof(dev_t); 233 (void) sysctl(mib, 2, &ep->tdev, &size, NULL, 0); 234 } 235#endif 236 if ((ep->idle = now - stp->st_atime) < 0) 237 ep->idle = 0; 238 } 239 (void)fclose(ut); 240 241 if (header || wcmd == 0) { 242 pr_header(&now, nusers); 243 if (wcmd == 0) 244 exit (0); 245 246#define HEADER_USER "USER" 247#define HEADER_TTY "TTY" 248#define HEADER_FROM "FROM" 249#define HEADER_LOGIN_IDLE "LOGIN@ IDLE " 250#define HEADER_WHAT "WHAT\n" 251#define WUSED (UT_NAMESIZE + UT_LINESIZE + UT_HOSTSIZE + \ 252 sizeof(HEADER_LOGIN_IDLE) + 3) /* header width incl. spaces */ 253 (void)printf("%-*.*s %-*.*s %-*.*s %s", 254 UT_NAMESIZE, UT_NAMESIZE, HEADER_USER, 255 UT_LINESIZE, UT_LINESIZE, HEADER_TTY, 256 UT_HOSTSIZE, UT_HOSTSIZE, HEADER_FROM, 257 HEADER_LOGIN_IDLE HEADER_WHAT); 258 } 259 260 if ((kp = kvm_getprocs(kd, KERN_PROC_ALL, 0, &nentries)) == NULL) 261 err(1, "%s", kvm_geterr(kd)); 262 for (i = 0; i < nentries; i++, kp++) { 263 struct proc *p = &kp->kp_proc; 264 struct eproc *e; 265 266 if (p->p_stat == SIDL || p->p_stat == SZOMB) 267 continue; 268 e = &kp->kp_eproc; 269 for (ep = ehead; ep != NULL; ep = ep->next) { 270 if (ep->tdev == e->e_tdev) { 271 /* 272 * proc is associated with this terminal 273 */ 274 if (ep->kp == NULL && e->e_pgid == e->e_tpgid) { 275 /* 276 * Proc is 'most interesting' 277 */ 278 if (proc_compare(&ep->kp->kp_proc, p)) 279 ep->kp = kp; 280 } 281 /* 282 * Proc debug option info; add to debug 283 * list using kinfo_proc kp_eproc.e_spare 284 * as next pointer; ptr to ptr avoids the 285 * ptr = long assumption. 286 */ 287 dkp = ep->dkp; 288 ep->dkp = kp; 289 *((struct kinfo_proc **)(&kp->kp_eproc.e_spare[ 0])) = dkp; 290 } 291 } 292 } 293 if ((ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) == -1 && 294 ioctl(STDERR_FILENO, TIOCGWINSZ, &ws) == -1 && 295 ioctl(STDIN_FILENO, TIOCGWINSZ, &ws) == -1) || ws.ws_col == 0) 296 ttywidth = 79; 297 else 298 ttywidth = ws.ws_col - 1; 299 argwidth = ttywidth - WUSED; 300 if (argwidth < 4) 301 argwidth = 8; 302 for (ep = ehead; ep != NULL; ep = ep->next) { 303 if (ep->kp == NULL) { 304 ep->args = "-"; 305 continue; 306 } 307 ep->args = fmt_argv(kvm_getargv(kd, ep->kp, argwidth), 308 ep->kp->kp_proc.p_comm, MAXCOMLEN); 309 if (ep->args == NULL) 310 err(1, NULL); 311 } 312 /* sort by idle time */ 313 if (sortidle && ehead != NULL) { 314 struct entry *from = ehead, *save; 315 316 ehead = NULL; 317 while (from != NULL) { 318 for (nextp = &ehead; 319 (*nextp) && from->idle >= (*nextp)->idle; 320 nextp = &(*nextp)->next) 321 continue; 322 save = from; 323 from = from->next; 324 save->next = *nextp; 325 *nextp = save; 326 } 327 } 328 329 if (!nflag) 330 if (gethostname(domain, sizeof(domain) - 1) < 0 || 331 (p = strchr(domain, '.')) == 0) 332 domain[0] = '\0'; 333 else { 334 domain[sizeof(domain) - 1] = '\0'; 335 memmove(domain, p, strlen(p) + 1); 336 } 337 338 for (ep = ehead; ep != NULL; ep = ep->next) { 339 p = *ep->utmp.ut_host ? ep->utmp.ut_host : "-"; 340 if ((x = strchr(p, ':')) != NULL) 341 *x++ = '\0'; 342 if (!nflag && isdigit(*p) && 343 (long)(l = inet_addr(p)) != -1 && 344 (hp = gethostbyaddr((char *)&l, sizeof(l), AF_INET))) { 345 if (domain[0] != '\0') { 346 p = hp->h_name; 347 p += strlen(hp->h_name); 348 p -= strlen(domain); 349 if (p > hp->h_name && strcmp(p, domain) == 0) 350 *p = '\0'; 351 } 352 p = hp->h_name; 353 } 354 if (nflag && *p && strcmp(p, "-") && inet_addr(p) == INADDR_NONE) { 355 hp = gethostbyname(p); 356 357 if (hp != NULL) { 358 struct in_addr in; 359 360 memmove(&in, hp->h_addr, sizeof(in)); 361 p = inet_ntoa(in); 362 } 363 } 364 if (x) { 365 (void)snprintf(buf, sizeof(buf), "%s:%.*s", p, 366 ep->utmp.ut_host + UT_HOSTSIZE - x, x); 367 p = buf; 368 } 369 if( dflag) { 370 for( dkp = ep->dkp; dkp != NULL; dkp = *((struct kinfo_proc **)(&dkp->kp_eproc.e_spare[ 0]))) { 371 char *p; 372 p = fmt_argv(kvm_getargv(kd, dkp, argwidth), 373 dkp->kp_proc.p_comm, MAXCOMLEN); 374 if (p == NULL) 375 p = "-"; 376 (void)printf( "\t\t%-9d %s\n", dkp->kp_proc.p_pid, p); 377 } 378 } 379 (void)printf("%-*.*s %-*.*s %-*.*s ", 380 UT_NAMESIZE, UT_NAMESIZE, ep->utmp.ut_name, 381 UT_LINESIZE, UT_LINESIZE, 382 strncmp(ep->utmp.ut_line, "tty", 3) && 383 strncmp(ep->utmp.ut_line, "cua", 3) ? 384 ep->utmp.ut_line : ep->utmp.ut_line + 3, 385 UT_HOSTSIZE, UT_HOSTSIZE, *p ? p : "-"); 386 pr_attime(&ep->utmp.ut_time, &now); 387 longidle=pr_idle(ep->idle); 388 if (longidle) 389 argwidth--; 390 (void)printf("%.*s\n", argwidth, ep->args); 391 } 392 exit(0); 393} 394 395static void 396pr_header(nowp, nusers) 397 time_t *nowp; 398 int nusers; 399{ 400 double avenrun[3]; 401 time_t uptime; 402 int days, hrs, i, mins, secs; 403 int mib[2]; 404 size_t size; 405 char buf[256]; 406 407 /* 408 * Print time of day. 409 * 410 * SCCS forces the string manipulation below, as it replaces 411 * %, M, and % in a character string with the file name. 412 */ 413 (void)strftime(buf, sizeof(buf) - 1, 414 __CONCAT("%l:%","M%p"), localtime(nowp)); 415 buf[sizeof(buf) - 1] = '\0'; 416 (void)printf("%s ", buf); 417 418 /* 419 * Print how long system has been up. 420 * (Found by looking getting "boottime" from the kernel) 421 */ 422 mib[0] = CTL_KERN; 423 mib[1] = KERN_BOOTTIME; 424 size = sizeof(boottime); 425 if (sysctl(mib, 2, &boottime, &size, NULL, 0) != -1 && 426 boottime.tv_sec != 0) { 427 uptime = now - boottime.tv_sec; 428 uptime += 30; 429 days = uptime / 86400; 430 uptime %= 86400; 431 hrs = uptime / 3600; 432 uptime %= 3600; 433 mins = uptime / 60; 434 secs = uptime % 60; 435 (void)printf(" up"); 436 if (days > 0) 437 (void)printf(" %d day%s,", days, days > 1 ? "s" : ""); 438 if (hrs > 0 && mins > 0) 439 (void)printf(" %2d:%02d,", hrs, mins); 440 else if (hrs > 0) 441 (void)printf(" %d hr%s,", 442 hrs, hrs > 1 ? "s" : ""); 443 else if (mins > 0) 444 (void)printf(" %d min%s,", 445 mins, mins > 1 ? "s" : ""); 446 else 447 (void)printf(" %d sec%s,", 448 secs, secs > 1 ? "s" : ""); 449 } 450 451 /* Print number of users logged in to system */ 452 (void)printf(" %d user%s", nusers, nusers == 1 ? "" : "s"); 453 454 /* 455 * Print 1, 5, and 15 minute load averages. 456 */ 457 if (getloadavg(avenrun, sizeof(avenrun) / sizeof(avenrun[0])) == -1) 458 (void)printf(", no load average information available\n"); 459 else { 460 (void)printf(", load averages:"); 461 for (i = 0; i < (sizeof(avenrun) / sizeof(avenrun[0])); i++) { 462 if (i > 0) 463 (void)printf(","); 464 (void)printf(" %.2f", avenrun[i]); 465 } 466 (void)printf("\n"); 467 } 468} 469 470static struct stat * 471ttystat(line) 472 char *line; 473{ 474 static struct stat sb; 475 char ttybuf[MAXPATHLEN]; 476 477 (void)snprintf(ttybuf, sizeof(ttybuf), "%s/%s", _PATH_DEV, line); 478 if (stat(ttybuf, &sb)) { 479 warn("%s", ttybuf); 480 return NULL; 481 } 482 return (&sb); 483} 484 485static void 486usage(wcmd) 487 int wcmd; 488{ 489 if (wcmd) 490 (void)fprintf(stderr, 491 "usage: w [-dhin] [-M core] [-N system] [user]\n"); 492 else 493 (void)fprintf(stderr, 494 "usage: uptime\n"); 495 exit (1); 496} 497