1 /*- 2 * Copyright (c) 1980, 1991, 1993, 1994 3 * The Regents of the University of California. All rights reserved. 4 * 5 * %sccs.include.redist.c% 6 */ 7 8 #ifndef lint 9 static char copyright[] = 10 "@(#) Copyright (c) 1980, 1991, 1993, 1994\n\ 11 The Regents of the University of California. All rights reserved.\n"; 12 #endif /* not lint */ 13 14 #ifndef lint 15 static char sccsid[] = "@(#)w.c 8.6 (Berkeley) 06/30/94"; 16 #endif /* not lint */ 17 18 /* 19 * w - print system status (who and what) 20 * 21 * This program is similar to the systat command on Tenex/Tops 10/20 22 * 23 */ 24 #include <sys/param.h> 25 #include <sys/time.h> 26 #include <sys/stat.h> 27 #include <sys/sysctl.h> 28 #include <sys/proc.h> 29 #include <sys/user.h> 30 #include <sys/ioctl.h> 31 #include <sys/socket.h> 32 #include <sys/tty.h> 33 34 #include <machine/cpu.h> 35 #include <netinet/in.h> 36 #include <arpa/inet.h> 37 38 #include <ctype.h> 39 #include <err.h> 40 #include <errno.h> 41 #include <fcntl.h> 42 #include <kvm.h> 43 #include <netdb.h> 44 #include <nlist.h> 45 #include <paths.h> 46 #include <stdio.h> 47 #include <stdlib.h> 48 #include <string.h> 49 #include <tzfile.h> 50 #include <unistd.h> 51 #include <utmp.h> 52 #include <vis.h> 53 54 #include "extern.h" 55 56 struct timeval boottime; 57 struct utmp utmp; 58 struct winsize ws; 59 kvm_t *kd; 60 time_t now; /* the current time of day */ 61 time_t uptime; /* time of last reboot & elapsed time since */ 62 int ttywidth; /* width of tty */ 63 int argwidth; /* width of tty */ 64 int header = 1; /* true if -h flag: don't print heading */ 65 int nflag; /* true if -n flag: don't convert addrs */ 66 int sortidle; /* sort bu idle time */ 67 char *sel_user; /* login of particular user selected */ 68 char domain[MAXHOSTNAMELEN]; 69 70 /* 71 * One of these per active utmp entry. 72 */ 73 struct entry { 74 struct entry *next; 75 struct utmp utmp; 76 dev_t tdev; /* dev_t of terminal */ 77 time_t idle; /* idle time of terminal in seconds */ 78 struct kinfo_proc *kp; /* `most interesting' proc */ 79 char *args; /* arg list of interesting process */ 80 } *ep, *ehead = NULL, **nextp = &ehead; 81 82 static void pr_header __P((time_t *, int)); 83 static struct stat 84 *ttystat __P((char *)); 85 static void usage __P((int)); 86 87 char *fmt_argv __P((char **, char *, int)); /* ../../bin/ps/fmt.c */ 88 89 int 90 main(argc, argv) 91 int argc; 92 char **argv; 93 { 94 extern char *__progname; 95 struct kinfo_proc *kp; 96 struct hostent *hp; 97 struct stat *stp; 98 FILE *ut; 99 u_long l; 100 size_t arglen; 101 int ch, i, nentries, nusers, wcmd; 102 char *memf, *nlistf, *p, *vis_args, *x; 103 char buf[MAXHOSTNAMELEN], errbuf[256]; 104 105 /* Are we w(1) or uptime(1)? */ 106 p = __progname; 107 if (*p == '-') 108 p++; 109 if (*p == 'u') { 110 wcmd = 0; 111 p = ""; 112 } else { 113 wcmd = 1; 114 p = "hiflM:N:nsuw"; 115 } 116 117 memf = nlistf = NULL; 118 while ((ch = getopt(argc, argv, p)) != EOF) 119 switch (ch) { 120 case 'h': 121 header = 0; 122 break; 123 case 'i': 124 sortidle = 1; 125 break; 126 case 'M': 127 header = 0; 128 memf = optarg; 129 break; 130 case 'N': 131 nlistf = optarg; 132 break; 133 case 'n': 134 nflag = 1; 135 break; 136 case 'f': case 'l': case 's': case 'u': case 'w': 137 warnx("[-flsuw] no longer supported"); 138 /* FALLTHROUGH */ 139 case '?': 140 default: 141 usage(wcmd); 142 } 143 argc -= optind; 144 argv += optind; 145 146 if ((kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf)) == NULL) 147 errx(1, "%s", errbuf); 148 149 (void)time(&now); 150 if ((ut = fopen(_PATH_UTMP, "r")) == NULL) 151 err(1, "%s", _PATH_UTMP); 152 153 if (*argv) 154 sel_user = *argv; 155 156 for (nusers = 0; fread(&utmp, sizeof(utmp), 1, ut);) { 157 if (utmp.ut_name[0] == '\0') 158 continue; 159 ++nusers; 160 if (wcmd == 0 || (sel_user && 161 strncmp(utmp.ut_name, sel_user, UT_NAMESIZE) != 0)) 162 continue; 163 if ((ep = calloc(1, sizeof(struct entry))) == NULL) 164 err(1, NULL); 165 *nextp = ep; 166 nextp = &(ep->next); 167 memmove(&(ep->utmp), &utmp, sizeof(struct utmp)); 168 if (!(stp = ttystat(ep->utmp.ut_line))) 169 continue; 170 ep->tdev = stp->st_rdev; 171 #ifdef CPU_CONSDEV 172 /* 173 * If this is the console device, attempt to ascertain 174 * the true console device dev_t. 175 */ 176 if (ep->tdev == 0) { 177 int mib[2]; 178 size_t size; 179 180 mib[0] = CTL_MACHDEP; 181 mib[1] = CPU_CONSDEV; 182 size = sizeof(dev_t); 183 (void) sysctl(mib, 2, &ep->tdev, &size, NULL, 0); 184 } 185 #endif 186 if ((ep->idle = now - stp->st_atime) < 0) 187 ep->idle = 0; 188 } 189 (void)fclose(ut); 190 191 if (header || wcmd == 0) { 192 pr_header(&now, nusers); 193 if (wcmd == 0) 194 exit (0); 195 } 196 197 #define HEADER "USER TTY FROM LOGIN@ IDLE WHAT\n" 198 #define WUSED (sizeof (HEADER) - sizeof ("WHAT\n")) 199 (void)printf(HEADER); 200 201 if ((kp = kvm_getprocs(kd, KERN_PROC_ALL, 0, &nentries)) == NULL) 202 err(1, "%s", kvm_geterr(kd)); 203 for (i = 0; i < nentries; i++, kp++) { 204 struct proc *p = &kp->kp_proc; 205 struct eproc *e; 206 207 if (p->p_stat == SIDL || p->p_stat == SZOMB) 208 continue; 209 e = &kp->kp_eproc; 210 for (ep = ehead; ep != NULL; ep = ep->next) { 211 if (ep->tdev == e->e_tdev && e->e_pgid == e->e_tpgid) { 212 /* 213 * Proc is in foreground of this terminal 214 */ 215 if (proc_compare(&ep->kp->kp_proc, p)) 216 ep->kp = kp; 217 break; 218 } 219 } 220 } 221 if ((ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) == -1 && 222 ioctl(STDERR_FILENO, TIOCGWINSZ, &ws) == -1 && 223 ioctl(STDIN_FILENO, TIOCGWINSZ, &ws) == -1) || ws.ws_col == 0) 224 ttywidth = 79; 225 else 226 ttywidth = ws.ws_col - 1; 227 argwidth = ttywidth - WUSED; 228 if (argwidth < 4) 229 argwidth = 8; 230 for (ep = ehead; ep != NULL; ep = ep->next) { 231 if (ep->kp == NULL) { 232 ep->args = "-"; 233 continue; 234 } 235 ep->args = fmt_argv(kvm_getargv(kd, ep->kp, argwidth), 236 ep->kp->kp_proc.p_comm, MAXCOMLEN); 237 if (ep->args == NULL) 238 err(1, NULL); 239 } 240 /* sort by idle time */ 241 if (sortidle && ehead != NULL) { 242 struct entry *from = ehead, *save; 243 244 ehead = NULL; 245 while (from != NULL) { 246 for (nextp = &ehead; 247 (*nextp) && from->idle >= (*nextp)->idle; 248 nextp = &(*nextp)->next) 249 continue; 250 save = from; 251 from = from->next; 252 save->next = *nextp; 253 *nextp = save; 254 } 255 } 256 257 if (!nflag) 258 if (gethostname(domain, sizeof(domain) - 1) < 0 || 259 (p = strchr(domain, '.')) == 0) 260 domain[0] = '\0'; 261 else { 262 domain[sizeof(domain) - 1] = '\0'; 263 memmove(domain, p, strlen(p) + 1); 264 } 265 266 if ((vis_args = malloc(argwidth * 4 + 1)) == NULL) 267 err(1, NULL); 268 for (ep = ehead; ep != NULL; ep = ep->next) { 269 p = *ep->utmp.ut_host ? ep->utmp.ut_host : "-"; 270 if ((x = strchr(p, ':')) != NULL) 271 *x++ = '\0'; 272 if (!nflag && isdigit(*p) && 273 (long)(l = inet_addr(p)) != -1 && 274 (hp = gethostbyaddr((char *)&l, sizeof(l), AF_INET))) { 275 if (domain[0] != '\0') { 276 p = hp->h_name; 277 p += strlen(hp->h_name); 278 p -= strlen(domain); 279 if (p > hp->h_name && strcmp(p, domain) == 0) 280 *p = '\0'; 281 } 282 p = hp->h_name; 283 } 284 if (x) { 285 (void)snprintf(buf, sizeof(buf), "%s:%.*s", p, 286 ep->utmp.ut_host + UT_HOSTSIZE - x, x); 287 p = buf; 288 } 289 (void)printf("%-*.*s %-2.2s %-*.*s ", 290 UT_NAMESIZE, UT_NAMESIZE, ep->utmp.ut_name, 291 strncmp(ep->utmp.ut_line, "tty", 3) ? 292 ep->utmp.ut_line : ep->utmp.ut_line + 3, 293 UT_HOSTSIZE, UT_HOSTSIZE, *p ? p : "-"); 294 pr_attime(&ep->utmp.ut_time, &now); 295 pr_idle(ep->idle); 296 if (ep->args != NULL) { 297 arglen = strlen(ep->args); 298 strvisx(vis_args, ep->args, 299 arglen > argwidth ? argwidth : arglen, 300 VIS_TAB | VIS_NL | VIS_NOSLASH); 301 } 302 (void)printf("%.*s\n", argwidth, ep->args); 303 } 304 exit(0); 305 } 306 307 static void 308 pr_header(nowp, nusers) 309 time_t *nowp; 310 int nusers; 311 { 312 double avenrun[3]; 313 time_t uptime; 314 int days, hrs, i, mins; 315 int mib[2]; 316 size_t size; 317 char buf[256]; 318 319 /* 320 * Print time of day. 321 * 322 * SCCS forces the string manipulation below, as it replaces 323 * %, M, and % in a character string with the file name. 324 */ 325 (void)strftime(buf, sizeof(buf), 326 __CONCAT("%l:%","M%p"), localtime(nowp)); 327 (void)printf("%s ", buf); 328 329 /* 330 * Print how long system has been up. 331 * (Found by looking getting "boottime" from the kernel) 332 */ 333 mib[0] = CTL_KERN; 334 mib[1] = KERN_BOOTTIME; 335 size = sizeof(boottime); 336 if (sysctl(mib, 2, &boottime, &size, NULL, 0) != -1 && 337 boottime.tv_sec != 0) { 338 uptime = now - boottime.tv_sec; 339 uptime += 30; 340 days = uptime / SECSPERDAY; 341 uptime %= SECSPERDAY; 342 hrs = uptime / SECSPERHOUR; 343 uptime %= SECSPERHOUR; 344 mins = uptime / SECSPERMIN; 345 (void)printf(" up"); 346 if (days > 0) 347 (void)printf(" %d day%s,", days, days > 1 ? "s" : ""); 348 if (hrs > 0 && mins > 0) 349 (void)printf(" %2d:%02d,", hrs, mins); 350 else { 351 if (hrs > 0) 352 (void)printf(" %d hr%s,", 353 hrs, hrs > 1 ? "s" : ""); 354 if (mins > 0) 355 (void)printf(" %d min%s,", 356 mins, mins > 1 ? "s" : ""); 357 } 358 } 359 360 /* Print number of users logged in to system */ 361 (void)printf(" %d user%s", nusers, nusers > 1 ? "s" : ""); 362 363 /* 364 * Print 1, 5, and 15 minute load averages. 365 */ 366 if (getloadavg(avenrun, sizeof(avenrun) / sizeof(avenrun[0])) == -1) 367 (void)printf(", no load average information available\n"); 368 else { 369 (void)printf(", load averages:"); 370 for (i = 0; i < (sizeof(avenrun) / sizeof(avenrun[0])); i++) { 371 if (i > 0) 372 (void)printf(","); 373 (void)printf(" %.2f", avenrun[i]); 374 } 375 (void)printf("\n"); 376 } 377 } 378 379 static struct stat * 380 ttystat(line) 381 char *line; 382 { 383 static struct stat sb; 384 char ttybuf[MAXPATHLEN]; 385 386 (void)snprintf(ttybuf, sizeof(ttybuf), "%s/%s", _PATH_DEV, line); 387 if (stat(ttybuf, &sb)) 388 return (NULL); 389 return (&sb); 390 } 391 392 static void 393 usage(wcmd) 394 int wcmd; 395 { 396 if (wcmd) 397 (void)fprintf(stderr, 398 "usage: w: [-hin] [-M core] [-N system] [user]\n"); 399 else 400 (void)fprintf(stderr, "uptime\n"); 401 exit (1); 402 } 403