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 char *args; /* arg list of interesting process */ 106 } *ep, *ehead = NULL, **nextp = &ehead; 107 108 static void pr_header __P((time_t *, int)); 109 static struct stat 110 *ttystat __P((char *)); 111 static void usage __P((int)); 112 113 char *fmt_argv __P((char **, char *, int)); /* ../../bin/ps/fmt.c */ 114 115 int 116 main(argc, argv) 117 int argc; 118 char **argv; 119 { 120 extern char *__progname; 121 struct kinfo_proc *kp; 122 struct hostent *hp; 123 struct stat *stp; 124 FILE *ut; 125 u_long l; 126 size_t arglen; 127 int ch, i, nentries, nusers, wcmd; 128 char *memf, *nlistf, *p, *vis_args, *x; 129 char buf[MAXHOSTNAMELEN], errbuf[256]; 130 131 /* Are we w(1) or uptime(1)? */ 132 p = __progname; 133 if (*p == '-') 134 p++; 135 if (*p == 'u') { 136 wcmd = 0; 137 p = ""; 138 } else { 139 wcmd = 1; 140 p = "hiflM:N:nsuw"; 141 } 142 143 memf = nlistf = NULL; 144 while ((ch = getopt(argc, argv, p)) != EOF) 145 switch (ch) { 146 case 'h': 147 header = 0; 148 break; 149 case 'i': 150 sortidle = 1; 151 break; 152 case 'M': 153 header = 0; 154 memf = optarg; 155 break; 156 case 'N': 157 nlistf = optarg; 158 break; 159 case 'n': 160 nflag = 1; 161 break; 162 case 'f': case 'l': case 's': case 'u': case 'w': 163 warnx("[-flsuw] no longer supported"); 164 /* FALLTHROUGH */ 165 case '?': 166 default: 167 usage(wcmd); 168 } 169 argc -= optind; 170 argv += optind; 171 172 if ((kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf)) == NULL) 173 errx(1, "%s", errbuf); 174 175 (void)time(&now); 176 if ((ut = fopen(_PATH_UTMP, "r")) == NULL) 177 err(1, "%s", _PATH_UTMP); 178 179 if (*argv) 180 sel_user = *argv; 181 182 for (nusers = 0; fread(&utmp, sizeof(utmp), 1, ut);) { 183 if (utmp.ut_name[0] == '\0') 184 continue; 185 ++nusers; 186 if (wcmd == 0 || (sel_user && 187 strncmp(utmp.ut_name, sel_user, UT_NAMESIZE) != 0)) 188 continue; 189 if ((ep = calloc(1, sizeof(struct entry))) == NULL) 190 err(1, NULL); 191 *nextp = ep; 192 nextp = &(ep->next); 193 memmove(&(ep->utmp), &utmp, sizeof(struct utmp)); 194 if (!(stp = ttystat(ep->utmp.ut_line))) 195 continue; 196 ep->tdev = stp->st_rdev; 197 #ifdef CPU_CONSDEV 198 /* 199 * If this is the console device, attempt to ascertain 200 * the true console device dev_t. 201 */ 202 if (ep->tdev == 0) { 203 int mib[2]; 204 size_t size; 205 206 mib[0] = CTL_MACHDEP; 207 mib[1] = CPU_CONSDEV; 208 size = sizeof(dev_t); 209 (void) sysctl(mib, 2, &ep->tdev, &size, NULL, 0); 210 } 211 #endif 212 if ((ep->idle = now - stp->st_atime) < 0) 213 ep->idle = 0; 214 } 215 (void)fclose(ut); 216 217 if (header || wcmd == 0) { 218 pr_header(&now, nusers); 219 if (wcmd == 0) 220 exit (0); 221 } 222 223 #define HEADER "USER TTY FROM LOGIN@ IDLE WHAT\n" 224 #define WUSED (sizeof (HEADER) - sizeof ("WHAT\n")) 225 (void)printf(HEADER); 226 227 if ((kp = kvm_getprocs(kd, KERN_PROC_ALL, 0, &nentries)) == NULL) 228 err(1, "%s", kvm_geterr(kd)); 229 for (i = 0; i < nentries; i++, kp++) { 230 struct proc *p = &kp->kp_proc; 231 struct eproc *e; 232 233 if (p->p_stat == SIDL || p->p_stat == SZOMB) 234 continue; 235 e = &kp->kp_eproc; 236 for (ep = ehead; ep != NULL; ep = ep->next) { 237 if (ep->tdev == e->e_tdev && e->e_pgid == e->e_tpgid) { 238 /* 239 * Proc is in foreground of this terminal 240 */ 241 if (proc_compare(&ep->kp->kp_proc, p)) 242 ep->kp = kp; 243 break; 244 } 245 } 246 } 247 if ((ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) == -1 && 248 ioctl(STDERR_FILENO, TIOCGWINSZ, &ws) == -1 && 249 ioctl(STDIN_FILENO, TIOCGWINSZ, &ws) == -1) || ws.ws_col == 0) 250 ttywidth = 79; 251 else 252 ttywidth = ws.ws_col - 1; 253 argwidth = ttywidth - WUSED; 254 if (argwidth < 4) 255 argwidth = 8; 256 for (ep = ehead; ep != NULL; ep = ep->next) { 257 if (ep->kp == NULL) { 258 ep->args = "-"; 259 continue; 260 } 261 ep->args = fmt_argv(kvm_getargv(kd, ep->kp, argwidth), 262 ep->kp->kp_proc.p_comm, MAXCOMLEN); 263 if (ep->args == NULL) 264 err(1, NULL); 265 } 266 /* sort by idle time */ 267 if (sortidle && ehead != NULL) { 268 struct entry *from = ehead, *save; 269 270 ehead = NULL; 271 while (from != NULL) { 272 for (nextp = &ehead; 273 (*nextp) && from->idle >= (*nextp)->idle; 274 nextp = &(*nextp)->next) 275 continue; 276 save = from; 277 from = from->next; 278 save->next = *nextp; 279 *nextp = save; 280 } 281 } 282 283 if (!nflag) 284 if (gethostname(domain, sizeof(domain) - 1) < 0 || 285 (p = strchr(domain, '.')) == 0) 286 domain[0] = '\0'; 287 else { 288 domain[sizeof(domain) - 1] = '\0'; 289 memmove(domain, p, strlen(p) + 1); 290 } 291 292 if ((vis_args = malloc(argwidth * 4 + 1)) == NULL) 293 err(1, NULL); 294 for (ep = ehead; ep != NULL; ep = ep->next) { 295 p = *ep->utmp.ut_host ? ep->utmp.ut_host : "-"; 296 if ((x = strchr(p, ':')) != NULL) 297 *x++ = '\0'; 298 if (!nflag && isdigit(*p) && 299 (long)(l = inet_addr(p)) != -1 && 300 (hp = gethostbyaddr((char *)&l, sizeof(l), AF_INET))) { 301 if (domain[0] != '\0') { 302 p = hp->h_name; 303 p += strlen(hp->h_name); 304 p -= strlen(domain); 305 if (p > hp->h_name && strcmp(p, domain) == 0) 306 *p = '\0'; 307 } 308 p = hp->h_name; 309 } 310 if (x) { 311 (void)snprintf(buf, sizeof(buf), "%s:%.*s", p, 312 ep->utmp.ut_host + UT_HOSTSIZE - x, x); 313 p = buf; 314 } 315 (void)printf("%-*.*s %-2.2s %-*.*s ", 316 UT_NAMESIZE, UT_NAMESIZE, ep->utmp.ut_name, 317 strncmp(ep->utmp.ut_line, "tty", 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 if (ep->args != NULL) { 323 arglen = strlen(ep->args); 324 strvisx(vis_args, ep->args, 325 arglen > argwidth ? argwidth : arglen, 326 VIS_TAB | VIS_NL | VIS_NOSLASH); 327 } 328 (void)printf("%.*s\n", argwidth, ep->args); 329 } 330 exit(0); 331 } 332 333 static void 334 pr_header(nowp, nusers) 335 time_t *nowp; 336 int nusers; 337 { 338 double avenrun[3]; 339 time_t uptime; 340 int days, hrs, i, mins; 341 int mib[2]; 342 size_t size; 343 char buf[256]; 344 345 /* 346 * Print time of day. 347 * 348 * SCCS forces the string manipulation below, as it replaces 349 * %, M, and % in a character string with the file name. 350 */ 351 (void)strftime(buf, sizeof(buf), 352 __CONCAT("%l:%","M%p"), localtime(nowp)); 353 (void)printf("%s ", buf); 354 355 /* 356 * Print how long system has been up. 357 * (Found by looking getting "boottime" from the kernel) 358 */ 359 mib[0] = CTL_KERN; 360 mib[1] = KERN_BOOTTIME; 361 size = sizeof(boottime); 362 if (sysctl(mib, 2, &boottime, &size, NULL, 0) != -1 && 363 boottime.tv_sec != 0) { 364 uptime = now - boottime.tv_sec; 365 uptime += 30; 366 days = uptime / SECSPERDAY; 367 uptime %= SECSPERDAY; 368 hrs = uptime / SECSPERHOUR; 369 uptime %= SECSPERHOUR; 370 mins = uptime / SECSPERMIN; 371 (void)printf(" up"); 372 if (days > 0) 373 (void)printf(" %d day%s,", days, days > 1 ? "s" : ""); 374 if (hrs > 0 && mins > 0) 375 (void)printf(" %2d:%02d,", hrs, mins); 376 else { 377 if (hrs > 0) 378 (void)printf(" %d hr%s,", 379 hrs, hrs > 1 ? "s" : ""); 380 if (mins > 0) 381 (void)printf(" %d min%s,", 382 mins, mins > 1 ? "s" : ""); 383 } 384 } 385 386 /* Print number of users logged in to system */ 387 (void)printf(" %d user%s", nusers, nusers != 1 ? "s" : ""); 388 389 /* 390 * Print 1, 5, and 15 minute load averages. 391 */ 392 if (getloadavg(avenrun, sizeof(avenrun) / sizeof(avenrun[0])) == -1) 393 (void)printf(", no load average information available\n"); 394 else { 395 (void)printf(", load averages:"); 396 for (i = 0; i < (sizeof(avenrun) / sizeof(avenrun[0])); i++) { 397 if (i > 0) 398 (void)printf(","); 399 (void)printf(" %.2f", avenrun[i]); 400 } 401 (void)printf("\n"); 402 } 403 } 404 405 static struct stat * 406 ttystat(line) 407 char *line; 408 { 409 static struct stat sb; 410 char ttybuf[MAXPATHLEN]; 411 412 (void)snprintf(ttybuf, sizeof(ttybuf), "%s/%s", _PATH_DEV, line); 413 if (stat(ttybuf, &sb)) 414 return (NULL); 415 return (&sb); 416 } 417 418 static void 419 usage(wcmd) 420 int wcmd; 421 { 422 if (wcmd) 423 (void)fprintf(stderr, 424 "usage: w: [-hin] [-M core] [-N system] [user]\n"); 425 else 426 (void)fprintf(stderr, "uptime\n"); 427 exit (1); 428 } 429