w.c revision 48566
1219561Savg/*- 2219561Savg * Copyright (c) 1980, 1991, 1993, 1994 3262818Smarcel * The Regents of the University of California. All rights reserved. 4219561Savg * 5262818Smarcel * Redistribution and use in source and binary forms, with or without 6262818Smarcel * modification, are permitted provided that the following conditions 7219561Savg * are met: 8220437Sart * 1. Redistributions of source code must retain the above copyright 9219561Savg * notice, this list of conditions and the following disclaimer. 10219561Savg * 2. Redistributions in binary form must reproduce the above copyright 11219561Savg * notice, this list of conditions and the following disclaimer in the 12262818Smarcel * documentation and/or other materials provided with the distribution. 13262818Smarcel * 3. All advertising materials mentioning features or use of this software 14289769Sjhb * must display the following acknowledgement: 15219561Savg * This product includes software developed by the University of 16219561Savg * California, Berkeley and its contributors. 17253996Savg * 4. Neither the name of the University nor the names of its contributors 18262818Smarcel * 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 1.34 1999/04/22 23:40:56 ache 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 by 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 *, int)); 120static void usage __P((int)); 121static int this_is_uptime __P((const char *s)); 122 123char *fmt_argv __P((char **, char *, int)); /* ../../bin/ps/fmt.c */ 124 125int 126main(argc, argv) 127 int argc; 128 char **argv; 129{ 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 int ch, i, nentries, nusers, wcmd, longidle; 137 char *memf, *nlistf, *p, *x; 138 char buf[MAXHOSTNAMELEN], errbuf[256]; 139 140 (void) setlocale(LC_ALL, ""); 141 142 /* Are we w(1) or uptime(1)? */ 143 if (this_is_uptime(argv[0]) == 0) { 144 wcmd = 0; 145 p = ""; 146 } else { 147 wcmd = 1; 148 p = "dhiflM:N:nsuw"; 149 } 150 151 memf = nlistf = NULL; 152 while ((ch = getopt(argc, argv, p)) != -1) 153 switch (ch) { 154 case 'd': 155 dflag = 1; 156 break; 157 case 'h': 158 header = 0; 159 break; 160 case 'i': 161 sortidle = 1; 162 break; 163 case 'M': 164 header = 0; 165 memf = optarg; 166 break; 167 case 'N': 168 nlistf = optarg; 169 break; 170 case 'n': 171 nflag = 1; 172 break; 173 case 'f': case 'l': case 's': case 'u': case 'w': 174 warnx("[-flsuw] no longer supported"); 175 /* FALLTHROUGH */ 176 case '?': 177 default: 178 usage(wcmd); 179 } 180 argc -= optind; 181 argv += optind; 182 183 if (!(_res.options & RES_INIT)) 184 res_init(); 185 _res.retrans = 2; /* resolver timeout to 2 seconds per try */ 186 _res.retry = 1; /* only try once.. */ 187 188 /* 189 * Discard setgid privileges if not the running kernel so that bad 190 * guys can't print interesting stuff from kernel memory. 191 */ 192 if (nlistf != NULL || memf != NULL) 193 setgid(getgid()); 194 195 if ((kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf)) == NULL) 196 errx(1, "%s", errbuf); 197 198 (void)time(&now); 199 if ((ut = fopen(_PATH_UTMP, "r")) == NULL) 200 err(1, "%s", _PATH_UTMP); 201 202 if (*argv) 203 sel_user = *argv; 204 205 for (nusers = 0; fread(&utmp, sizeof(utmp), 1, ut);) { 206 if (utmp.ut_name[0] == '\0') 207 continue; 208 if (!(stp = ttystat(utmp.ut_line, UT_LINESIZE))) 209 continue; /* corrupted record */ 210 ++nusers; 211 if (wcmd == 0 || (sel_user && 212 strncmp(utmp.ut_name, sel_user, UT_NAMESIZE) != 0)) 213 continue; 214 if ((ep = calloc(1, sizeof(struct entry))) == NULL) 215 errx(1, "calloc"); 216 *nextp = ep; 217 nextp = &(ep->next); 218 memmove(&(ep->utmp), &utmp, sizeof(struct utmp)); 219 ep->tdev = stp->st_rdev; 220#ifdef CPU_CONSDEV 221 /* 222 * If this is the console device, attempt to ascertain 223 * the true console device dev_t. 224 */ 225 if (ep->tdev == 0) { 226 int mib[2]; 227 size_t size; 228 229 mib[0] = CTL_MACHDEP; 230 mib[1] = CPU_CONSDEV; 231 size = sizeof(dev_t); 232 (void) sysctl(mib, 2, &ep->tdev, &size, NULL, 0); 233 } 234#endif 235 if ((ep->idle = now - stp->st_atime) < 0) 236 ep->idle = 0; 237 } 238 (void)fclose(ut); 239 240 if (header || wcmd == 0) { 241 pr_header(&now, nusers); 242 if (wcmd == 0) 243 exit (0); 244 245#define HEADER_USER "USER" 246#define HEADER_TTY "TTY" 247#define HEADER_FROM "FROM" 248#define HEADER_LOGIN_IDLE "LOGIN@ IDLE " 249#define HEADER_WHAT "WHAT\n" 250#define WUSED (UT_NAMESIZE + UT_LINESIZE + UT_HOSTSIZE + \ 251 sizeof(HEADER_LOGIN_IDLE) + 3) /* header width incl. spaces */ 252 (void)printf("%-*.*s %-*.*s %-*.*s %s", 253 UT_NAMESIZE, UT_NAMESIZE, HEADER_USER, 254 UT_LINESIZE, UT_LINESIZE, HEADER_TTY, 255 UT_HOSTSIZE, UT_HOSTSIZE, HEADER_FROM, 256 HEADER_LOGIN_IDLE HEADER_WHAT); 257 } 258 259 if ((kp = kvm_getprocs(kd, KERN_PROC_ALL, 0, &nentries)) == NULL) 260 err(1, "%s", kvm_geterr(kd)); 261 for (i = 0; i < nentries; i++, kp++) { 262 struct proc *pr = &kp->kp_proc; 263 struct eproc *e; 264 265 if (pr->p_stat == SIDL || pr->p_stat == SZOMB) 266 continue; 267 e = &kp->kp_eproc; 268 for (ep = ehead; ep != NULL; ep = ep->next) { 269 if (ep->tdev == e->e_tdev) { 270 /* 271 * proc is associated with this terminal 272 */ 273 if (ep->kp == NULL && e->e_pgid == e->e_tpgid) { 274 /* 275 * Proc is 'most interesting' 276 */ 277 if (proc_compare(&ep->kp->kp_proc, pr)) 278 ep->kp = kp; 279 } 280 /* 281 * Proc debug option info; add to debug 282 * list using kinfo_proc kp_eproc.e_spare 283 * as next pointer; ptr to ptr avoids the 284 * ptr = long assumption. 285 */ 286 dkp = ep->dkp; 287 ep->dkp = kp; 288 *((struct kinfo_proc **)(&kp->kp_eproc.e_spare[0])) = dkp; 289 } 290 } 291 } 292 if ((ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) == -1 && 293 ioctl(STDERR_FILENO, TIOCGWINSZ, &ws) == -1 && 294 ioctl(STDIN_FILENO, TIOCGWINSZ, &ws) == -1) || ws.ws_col == 0) 295 ttywidth = 79; 296 else 297 ttywidth = ws.ws_col - 1; 298 argwidth = ttywidth - WUSED; 299 if (argwidth < 4) 300 argwidth = 8; 301 for (ep = ehead; ep != NULL; ep = ep->next) { 302 if (ep->kp == NULL) { 303 ep->args = "-"; 304 continue; 305 } 306 ep->args = fmt_argv(kvm_getargv(kd, ep->kp, argwidth), 307 ep->kp->kp_proc.p_comm, MAXCOMLEN); 308 if (ep->args == NULL) 309 err(1, NULL); 310 } 311 /* sort by idle time */ 312 if (sortidle && ehead != NULL) { 313 struct entry *from = ehead, *save; 314 315 ehead = NULL; 316 while (from != NULL) { 317 for (nextp = &ehead; 318 (*nextp) && from->idle >= (*nextp)->idle; 319 nextp = &(*nextp)->next) 320 continue; 321 save = from; 322 from = from->next; 323 save->next = *nextp; 324 *nextp = save; 325 } 326 } 327 328 if (!nflag) { 329 if (gethostname(domain, sizeof(domain) - 1) < 0 || 330 (p = strchr(domain, '.')) == 0) 331 domain[0] = '\0'; 332 else { 333 domain[sizeof(domain) - 1] = '\0'; 334 memmove(domain, p, strlen(p) + 1); 335 } 336 } 337 338 for (ep = ehead; ep != NULL; ep = ep->next) { 339 char host_buf[UT_HOSTSIZE + 1]; 340 341 host_buf[UT_HOSTSIZE] = '\0'; 342 strncpy(host_buf, ep->utmp.ut_host, UT_HOSTSIZE); 343 p = *host_buf ? host_buf : "-"; 344 if ((x = strchr(p, ':')) != NULL) 345 *x++ = '\0'; 346 if (!nflag && isdigit(*p) && 347 (long)(l = inet_addr(p)) != -1 && 348 (hp = gethostbyaddr((char *)&l, sizeof(l), AF_INET))) { 349 if (domain[0] != '\0') { 350 p = hp->h_name; 351 p += strlen(hp->h_name); 352 p -= strlen(domain); 353 if (p > hp->h_name && strcmp(p, domain) == 0) 354 *p = '\0'; 355 } 356 p = hp->h_name; 357 } 358 if (nflag && *p && strcmp(p, "-") && 359 inet_addr(p) == INADDR_NONE) { 360 hp = gethostbyname(p); 361 362 if (hp != NULL) { 363 struct in_addr in; 364 365 memmove(&in, hp->h_addr, sizeof(in)); 366 p = inet_ntoa(in); 367 } 368 } 369 if (x) { 370 (void)snprintf(buf, sizeof(buf), "%s:%s", p, x); 371 p = buf; 372 } 373 if (dflag) { 374 for (dkp = ep->dkp; dkp != NULL; dkp = *((struct kinfo_proc **)(&dkp->kp_eproc.e_spare[0]))) { 375 char *ptr; 376 ptr = fmt_argv(kvm_getargv(kd, dkp, argwidth), 377 dkp->kp_proc.p_comm, MAXCOMLEN); 378 if (ptr == NULL) 379 ptr = "-"; 380 (void)printf( "\t\t%-9d %s\n", dkp->kp_proc.p_pid, ptr); 381 } 382 } 383 (void)printf("%-*.*s %-*.*s %-*.*s ", 384 UT_NAMESIZE, UT_NAMESIZE, ep->utmp.ut_name, 385 UT_LINESIZE, UT_LINESIZE, 386 strncmp(ep->utmp.ut_line, "tty", 3) && 387 strncmp(ep->utmp.ut_line, "cua", 3) ? 388 ep->utmp.ut_line : ep->utmp.ut_line + 3, 389 UT_HOSTSIZE, UT_HOSTSIZE, *p ? p : "-"); 390 pr_attime(&ep->utmp.ut_time, &now); 391 longidle = pr_idle(ep->idle); 392 (void)printf("%.*s\n", argwidth - longidle, ep->args); 393 } 394 exit(0); 395} 396 397static void 398pr_header(nowp, nusers) 399 time_t *nowp; 400 int nusers; 401{ 402 double avenrun[3]; 403 time_t uptime; 404 int days, hrs, i, mins, secs; 405 int mib[2]; 406 size_t size; 407 char buf[256]; 408 409 /* 410 * Print time of day. 411 * 412 * SCCS forces the string manipulation below, as it replaces 413 * %, M, and % in a character string with the file name. 414 */ 415 (void)strftime(buf, sizeof(buf) - 1, 416 __CONCAT("%l:%","M%p"), localtime(nowp)); 417 buf[sizeof(buf) - 1] = '\0'; 418 (void)printf("%s ", buf); 419 420 /* 421 * Print how long system has been up. 422 * (Found by looking getting "boottime" from the kernel) 423 */ 424 mib[0] = CTL_KERN; 425 mib[1] = KERN_BOOTTIME; 426 size = sizeof(boottime); 427 if (sysctl(mib, 2, &boottime, &size, NULL, 0) != -1 && 428 boottime.tv_sec != 0) { 429 uptime = now - boottime.tv_sec; 430 uptime += 30; 431 days = uptime / 86400; 432 uptime %= 86400; 433 hrs = uptime / 3600; 434 uptime %= 3600; 435 mins = uptime / 60; 436 secs = uptime % 60; 437 (void)printf(" up"); 438 if (days > 0) 439 (void)printf(" %d day%s,", days, days > 1 ? "s" : ""); 440 if (hrs > 0 && mins > 0) 441 (void)printf(" %2d:%02d,", hrs, mins); 442 else if (hrs > 0) 443 (void)printf(" %d hr%s,", 444 hrs, hrs > 1 ? "s" : ""); 445 else if (mins > 0) 446 (void)printf(" %d min%s,", 447 mins, mins > 1 ? "s" : ""); 448 else 449 (void)printf(" %d sec%s,", 450 secs, secs > 1 ? "s" : ""); 451 } 452 453 /* Print number of users logged in to system */ 454 (void)printf(" %d user%s", nusers, nusers == 1 ? "" : "s"); 455 456 /* 457 * Print 1, 5, and 15 minute load averages. 458 */ 459 if (getloadavg(avenrun, sizeof(avenrun) / sizeof(avenrun[0])) == -1) 460 (void)printf(", no load average information available\n"); 461 else { 462 (void)printf(", load averages:"); 463 for (i = 0; i < (sizeof(avenrun) / sizeof(avenrun[0])); i++) { 464 if (i > 0) 465 (void)printf(","); 466 (void)printf(" %.2f", avenrun[i]); 467 } 468 (void)printf("\n"); 469 } 470} 471 472static struct stat * 473ttystat(line, sz) 474 char *line; 475 int sz; 476{ 477 static struct stat sb; 478 char ttybuf[MAXPATHLEN]; 479 480 (void)snprintf(ttybuf, sizeof(ttybuf), "%s%.*s", _PATH_DEV, sz, line); 481 if (stat(ttybuf, &sb)) { 482 warn("%s", ttybuf); 483 return NULL; 484 } 485 return (&sb); 486} 487 488static void 489usage(wcmd) 490 int wcmd; 491{ 492 if (wcmd) 493 (void)fprintf(stderr, 494 "usage: w [-dhin] [-M core] [-N system] [user]\n"); 495 else 496 (void)fprintf(stderr, 497 "usage: uptime\n"); 498 exit (1); 499} 500 501static int 502this_is_uptime(s) 503 const char *s; 504{ 505 const char *u; 506 507 if ((u = strrchr(s, '/')) != NULL) 508 ++u; 509 else 510 u = s; 511 if (strcmp(u, "uptime") == 0) 512 return(0); 513 return(-1); 514} 515 516