2 * Copyright (c) 1980, 1991, 1993, 1994
3 * The Regents of the University of California. All rights reserved.
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6 * modification, are permitted provided that the following conditions
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9 * notice, this list of conditions and the following disclaimer.
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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.
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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
33 * @(#) Copyright (c) 1980, 1991, 1993, 1994 The Regents of the University of California. All rights reserved.
34 * @(#)w.c 8.4 (Berkeley) 4/16/94
35 * $FreeBSD: src/usr.bin/w/w.c,v 1.38.2.6 2002/03/12 19:51:51 phantom Exp $
36 * $DragonFly: src/usr.bin/w/w.c,v 1.7 2005/03/25 14:15:23 liamfoy Exp $
40 * w - print system status (who and what)
42 * This program is similar to the systat command on Tenex/Tops 10/20
45 #include <sys/param.h>
48 #include <sys/sysctl.h>
50 #include <sys/ioctl.h>
51 #include <sys/socket.h>
54 #include <machine/cpu.h>
55 #include <netinet/in.h>
56 #include <arpa/inet.h>
76 #include <arpa/nameser.h>
81 struct timeval boottime;
85 time_t now; /* the current time of day */
86 time_t uptime; /* time of last reboot & elapsed time since */
87 int ttywidth; /* width of tty */
88 int argwidth; /* width of tty */
89 int header = 1; /* true if -h flag: don't print heading */
90 int nflag; /* true if -n flag: don't convert addrs */
91 int dflag; /* true if -d flag: output debug info */
92 int sortidle; /* sort by idle time */
93 int use_ampm; /* use AM/PM time */
94 int use_comma; /* use comma as floats separator */
95 char **sel_users; /* login array of particular users selected */
96 char domain[MAXHOSTNAMELEN];
99 * One of these per active utmp entry.
104 dev_t tdev; /* dev_t of terminal */
105 time_t idle; /* idle time of terminal in seconds */
106 struct kinfo_proc *kp; /* `most interesting' proc */
107 char *args; /* arg list of interesting process */
108 struct kinfo_proc *dkp; /* debug option proc list */
109 } *ep, *ehead = NULL, **nextp = &ehead;
111 #define debugproc(p) *((struct kinfo_proc **)&(p)->kp_eproc.e_spare[0])
113 static void pr_header(time_t *, int);
114 static struct stat *ttystat(char *, int);
115 static void usage(int);
116 static int this_is_uptime(const char *s);
118 char *fmt_argv(char **, char *, int); /* ../../bin/ps/fmt.c */
121 main(int argc, char **argv)
123 struct kinfo_proc *kp;
124 struct kinfo_proc *dkp;
130 int ch, i, nentries, nusers, wcmd, longidle, dropgid;
131 char *memf, *nlistf, *p, *x;
132 char buf[MAXHOSTNAMELEN], errbuf[_POSIX2_LINE_MAX];
134 (void)setlocale(LC_ALL, "");
135 use_ampm = (*nl_langinfo(T_FMT_AMPM) != '\0');
136 use_comma = (*nl_langinfo(RADIXCHAR) != ',');
138 /* Are we w(1) or uptime(1)? */
139 if (this_is_uptime(argv[0]) == 0) {
148 memf = nlistf = _PATH_DEVNULL;
149 while ((ch = getopt(argc, argv, p)) != -1)
172 case 'f': case 'l': case 's': case 'u': case 'w':
173 warnx("[-flsuw] no longer supported");
182 if (!(_res.options & RES_INIT))
184 _res.retrans = 2; /* resolver timeout to 2 seconds per try */
185 _res.retry = 1; /* only try once.. */
188 * Discard setgid privileges if not the running kernel so that bad
189 * guys can't print interesting stuff from kernel memory.
194 if ((kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf)) == NULL)
195 errx(1, "%s", errbuf);
198 if ((ut = fopen(_PATH_UTMP, "r")) == NULL)
199 err(1, "%s", _PATH_UTMP);
204 for (nusers = 0; fread(&utmp, sizeof(utmp), 1, ut);) {
205 if (utmp.ut_name[0] == '\0')
207 if (!(stp = ttystat(utmp.ut_line, UT_LINESIZE)))
208 continue; /* corrupted record */
217 for (user = sel_users; !usermatch && *user; user++)
218 if (!strncmp(utmp.ut_name, *user, UT_NAMESIZE))
223 if ((ep = calloc(1, sizeof(struct entry))) == NULL)
227 memmove(&ep->utmp, &utmp, sizeof(struct utmp));
228 ep->tdev = stp->st_rdev;
231 * If this is the console device, attempt to ascertain
232 * the true console device dev_t.
238 mib[0] = CTL_MACHDEP;
239 mib[1] = CPU_CONSDEV;
240 size = sizeof(dev_t);
241 (void)sysctl(mib, 2, &ep->tdev, &size, NULL, 0);
244 touched = stp->st_atime;
245 if (touched < ep->utmp.ut_time) {
246 /* tty untouched since before login */
247 touched = ep->utmp.ut_time;
249 if ((ep->idle = now - touched) < 0)
254 if (header || wcmd == 0) {
255 pr_header(&now, nusers);
261 #define HEADER_USER "USER"
262 #define HEADER_TTY "TTY"
263 #define HEADER_FROM "FROM"
264 #define HEADER_LOGIN_IDLE "LOGIN@ IDLE "
265 #define HEADER_WHAT "WHAT\n"
266 #define WUSED (UT_NAMESIZE + UT_LINESIZE + UT_HOSTSIZE + \
267 sizeof(HEADER_LOGIN_IDLE) + 3) /* header width incl. spaces */
268 (void)printf("%-*.*s %-*.*s %-*.*s %s",
269 UT_NAMESIZE, UT_NAMESIZE, HEADER_USER,
270 UT_LINESIZE, UT_LINESIZE, HEADER_TTY,
271 UT_HOSTSIZE, UT_HOSTSIZE, HEADER_FROM,
272 HEADER_LOGIN_IDLE HEADER_WHAT);
275 if ((kp = kvm_getprocs(kd, KERN_PROC_ALL, 0, &nentries)) == NULL)
276 err(1, "%s", kvm_geterr(kd));
277 for (i = 0; i < nentries; i++, kp++) {
278 struct proc *pr = &kp->kp_proc;
281 if (pr->p_stat == SIDL || pr->p_stat == SZOMB)
284 for (ep = ehead; ep != NULL; ep = ep->next) {
285 if (ep->tdev == e->e_tdev) {
287 * proc is associated with this terminal
289 if (ep->kp == NULL && e->e_pgid == e->e_tpgid) {
291 * Proc is 'most interesting'
293 if (proc_compare(&ep->kp->kp_proc, pr))
297 * Proc debug option info; add to debug
298 * list using kinfo_proc kp_eproc.e_spare
299 * as next pointer; ptr to ptr avoids the
300 * ptr = long assumption.
308 if ((ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) == -1 &&
309 ioctl(STDERR_FILENO, TIOCGWINSZ, &ws) == -1 &&
310 ioctl(STDIN_FILENO, TIOCGWINSZ, &ws) == -1) || ws.ws_col == 0)
313 ttywidth = ws.ws_col - 1;
314 argwidth = ttywidth - WUSED;
317 for (ep = ehead; ep != NULL; ep = ep->next) {
318 if (ep->kp == NULL) {
322 ep->args = fmt_argv(kvm_getargv(kd, ep->kp, argwidth),
323 ep->kp->kp_thread.td_comm, MAXCOMLEN);
324 if (ep->args == NULL)
327 /* sort by idle time */
328 if (sortidle && ehead != NULL) {
329 struct entry *from, *save;
333 while (from != NULL) {
335 (*nextp) && from->idle >= (*nextp)->idle;
336 nextp = &(*nextp)->next)
346 if (gethostname(domain, sizeof(domain)) < 0 ||
347 (p = strchr(domain, '.')) == NULL)
350 domain[sizeof(domain) - 1] = '\0';
351 memmove(domain, p, strlen(p) + 1);
355 for (ep = ehead; ep != NULL; ep = ep->next) {
356 char host_buf[UT_HOSTSIZE + 1];
358 host_buf[UT_HOSTSIZE] = '\0';
359 strncpy(host_buf, ep->utmp.ut_host, UT_HOSTSIZE);
360 p = *host_buf ? host_buf : "-";
361 if ((x = strchr(p, ':')) != NULL)
363 if (!nflag && isdigit(*p) && (l = inet_addr(p)) != -1 &&
364 (hp = gethostbyaddr((char *)&l, sizeof(l), AF_INET))) {
365 if (domain[0] != '\0') {
367 p += strlen(hp->h_name);
369 if (p > hp->h_name &&
370 strcasecmp(p, domain) == 0)
375 if (nflag && *p && strcmp(p, "-") &&
376 inet_addr(p) == INADDR_NONE) {
377 hp = gethostbyname(p);
382 memmove(&in, hp->h_addr, sizeof(in));
387 (void)snprintf(buf, sizeof(buf), "%s:%s", p, x);
391 for (dkp = ep->dkp; dkp != NULL; dkp = debugproc(dkp)) {
394 ptr = fmt_argv(kvm_getargv(kd, dkp, argwidth),
395 dkp->kp_thread.td_comm, MAXCOMLEN);
398 (void)printf("\t\t%-9d %s\n",
399 dkp->kp_proc.p_pid, ptr);
402 (void)printf("%-*.*s %-*.*s %-*.*s ",
403 UT_NAMESIZE, UT_NAMESIZE, ep->utmp.ut_name,
404 UT_LINESIZE, UT_LINESIZE,
405 strncmp(ep->utmp.ut_line, "tty", 3) &&
406 strncmp(ep->utmp.ut_line, "cua", 3) ?
407 ep->utmp.ut_line : ep->utmp.ut_line + 3,
408 UT_HOSTSIZE, UT_HOSTSIZE, *p ? p : "-");
409 pr_attime(&ep->utmp.ut_time, &now);
410 longidle = pr_idle(ep->idle);
411 (void)printf("%.*s\n", argwidth - longidle, ep->args);
418 pr_header(time_t *nowp, int nusers)
422 int days, hrs, i, mins, secs;
430 (void)strftime(buf, sizeof(buf) - 1,
431 use_ampm ? "%l:%M%p" : "%k:%M", localtime(nowp));
432 buf[sizeof(buf) - 1] = '\0';
433 (void)printf("%s ", buf);
436 * Print how long system has been up.
437 * (Found by looking at "boottime" from the kernel)
440 mib[1] = KERN_BOOTTIME;
441 size = sizeof(boottime);
442 if (sysctl(mib, 2, &boottime, &size, NULL, 0) != -1 &&
443 boottime.tv_sec != 0) {
444 uptime = now - boottime.tv_sec;
447 days = uptime / 86400;
455 (void)printf(" %d day%s,", days, days > 1 ? "s" : "");
456 if (hrs > 0 && mins > 0)
457 (void)printf(" %2d:%02d,", hrs, mins);
459 (void)printf(" %d hr%s,", hrs, hrs > 1 ? "s" : "");
461 (void)printf(" %d min%s,", mins, mins > 1 ? "s" : "");
463 (void)printf(" %d sec%s,", secs, secs > 1 ? "s" : "");
466 /* Print number of users logged in on system */
467 (void)printf(" %d user%s", nusers, nusers == 1 ? "" : "s");
470 * Print 1, 5, and 15 minute load averages.
472 if (getloadavg(avenrun, sizeof(avenrun) / sizeof(avenrun[0])) == -1)
473 (void)printf(", no load average information available\n");
475 (void)printf(", load averages:");
476 for (i = 0; i < (sizeof(avenrun) / sizeof(avenrun[0])); i++) {
477 if (use_comma && i > 0)
479 (void)printf(" %.2f", avenrun[i]);
486 ttystat(char *line, int sz)
488 static struct stat sb;
489 char ttybuf[MAXPATHLEN];
491 (void)snprintf(ttybuf, sizeof(ttybuf), "%s%.*s", _PATH_DEV, sz, line);
492 if (stat(ttybuf, &sb)) {
503 (void)fprintf(stderr,
504 "usage: w [-dhin] [-M core] [-N system] [user ...]\n");
506 (void)fprintf(stderr, "usage: uptime\n");
511 this_is_uptime(const char *s)
515 if ((u = strrchr(s, '/')) != NULL)
519 if (strcmp(u, "uptime") == 0)