1 /*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 1980, 1991, 1993, 1994
5 * The Regents of the University of California. All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32
33 #ifndef lint
34 static const char copyright[] =
35 "@(#) Copyright (c) 1980, 1991, 1993, 1994\n\
36 The Regents of the University of California. All rights reserved.\n";
37 #endif
38
39 #ifndef lint
40 static const char sccsid[] = "@(#)w.c 8.4 (Berkeley) 4/16/94";
41 #endif
42
43 /*
44 * w - print system status (who and what)
45 *
46 * This program is similar to the systat command on Tenex/Tops 10/20
47 *
48 */
49 #include <sys/param.h>
50 #include <sys/time.h>
51 #include <sys/stat.h>
52 #include <sys/sysctl.h>
53 #include <sys/proc.h>
54 #include <sys/user.h>
55 #include <sys/ioctl.h>
56 #include <sys/sbuf.h>
57 #include <sys/socket.h>
58 #include <sys/tty.h>
59 #include <sys/types.h>
60
61 #include <machine/cpu.h>
62 #include <netinet/in.h>
63 #include <arpa/inet.h>
64 #include <arpa/nameser.h>
65
66 #include <ctype.h>
67 #include <errno.h>
68 #include <fcntl.h>
69 #include <kvm.h>
70 #include <langinfo.h>
71 #include <libgen.h>
72 #include <libutil.h>
73 #include <limits.h>
74 #include <locale.h>
75 #include <netdb.h>
76 #include <nlist.h>
77 #include <paths.h>
78 #include <resolv.h>
79 #include <stdio.h>
80 #include <stdlib.h>
81 #include <string.h>
82 #include <timeconv.h>
83 #include <unistd.h>
84 #include <utmpx.h>
85 #include <vis.h>
86 #include <libxo/xo.h>
87
88 #include "extern.h"
89
90 static struct utmpx *utmp;
91 static struct winsize ws;
92 static kvm_t *kd;
93 static time_t now; /* the current time of day */
94 static size_t ttywidth; /* width of tty */
95 static size_t fromwidth = 0; /* max width of "from" field */
96 static size_t argwidth; /* width of arguments */
97 static int header = 1; /* true if -h flag: don't print heading */
98 static int nflag; /* true if -n flag: don't convert addrs */
99 static int dflag; /* true if -d flag: output debug info */
100 static int sortidle; /* sort by idle time */
101 int use_ampm; /* use AM/PM time */
102 static int use_comma; /* use comma as floats separator */
103 static char **sel_users; /* login array of particular users selected */
104
105 /*
106 * One of these per active utmp entry.
107 */
108 static struct entry {
109 struct entry *next;
110 struct utmpx utmp;
111 dev_t tdev; /* dev_t of terminal */
112 time_t idle; /* idle time of terminal in seconds */
113 struct kinfo_proc *kp; /* `most interesting' proc */
114 char *args; /* arg list of interesting process */
115 struct kinfo_proc *dkp; /* debug option proc list */
116 char *from; /* "from": name or addr */
117 char *save_from; /* original "from": name or addr */
118 } *ep, *ehead = NULL, **nextp = &ehead;
119
120 #define debugproc(p) *(&((struct kinfo_proc *)p)->ki_udata)
121
122 #define W_DISPUSERSIZE 10
123 #define W_DISPLINESIZE 8
124 #define W_MAXHOSTSIZE 40
125
126 static void pr_header(time_t *, int);
127 static struct stat *ttystat(char *);
128 static void usage(int);
129
130 char *fmt_argv(char **, char *, char *, size_t); /* ../../bin/ps/fmt.c */
131
132 int
main(int argc,char * argv[])133 main(int argc, char *argv[])
134 {
135 struct kinfo_proc *kp;
136 struct kinfo_proc *dkp;
137 struct stat *stp;
138 time_t touched;
139 size_t width;
140 int ch, i, nentries, nusers, wcmd, longidle, longattime;
141 const char *memf, *nlistf, *p, *save_p;
142 char *x_suffix;
143 char errbuf[_POSIX2_LINE_MAX];
144 char buf[MAXHOSTNAMELEN], fn[MAXHOSTNAMELEN];
145 char *dot;
146
147
148 argc = xo_parse_args(argc, argv);
149 if (argc < 0)
150 exit(1);
151
152 if (xo_get_style(NULL) == XO_STYLE_TEXT) {
153 setlocale(LC_ALL, "");
154 }
155 use_ampm = (*nl_langinfo(T_FMT_AMPM) != '\0');
156 use_comma = (*nl_langinfo(RADIXCHAR) != ',');
157 /* Are we w(1) or uptime(1)? */
158 if (strcmp(basename(argv[0]), "uptime") == 0) {
159 wcmd = 0;
160 p = "";
161 } else {
162 wcmd = 1;
163 p = "dhiflM:N:nsuw";
164 }
165
166 memf = _PATH_DEVNULL;
167 nlistf = NULL;
168 while ((ch = getopt(argc, argv, p)) != -1)
169 switch (ch) {
170 case 'd':
171 dflag = 1;
172 break;
173 case 'h':
174 header = 0;
175 break;
176 case 'i':
177 sortidle = 1;
178 break;
179 case 'M':
180 header = 0;
181 memf = optarg;
182 break;
183 case 'N':
184 nlistf = optarg;
185 break;
186 case 'n':
187 nflag += 1;
188 break;
189 case 'f': case 'l': case 's': case 'u': case 'w':
190 xo_warnx("-%c no longer supported", ch);
191 /* FALLTHROUGH */
192 case '?':
193 default:
194 usage(wcmd);
195 }
196 argc -= optind;
197 argv += optind;
198
199 if (!(_res.options & RES_INIT))
200 res_init();
201 _res.retrans = 2; /* resolver timeout to 2 seconds per try */
202 _res.retry = 1; /* only try once.. */
203
204 if ((kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf)) == NULL)
205 xo_errx(1, "%s", errbuf);
206
207 (void)time(&now);
208
209 if (*argv)
210 sel_users = argv;
211
212 setutxent();
213 for (nusers = 0; (utmp = getutxent()) != NULL;) {
214 struct addrinfo hints, *res;
215 struct sockaddr_storage ss;
216 struct sockaddr *sa = (struct sockaddr *)&ss;
217 struct sockaddr_in *lsin = (struct sockaddr_in *)&ss;
218 struct sockaddr_in6 *lsin6 = (struct sockaddr_in6 *)&ss;
219 int isaddr;
220
221 if (utmp->ut_type != USER_PROCESS)
222 continue;
223 if (!(stp = ttystat(utmp->ut_line)))
224 continue; /* corrupted record */
225 ++nusers;
226 if (wcmd == 0)
227 continue;
228 if (sel_users) {
229 int usermatch;
230 char **user;
231
232 usermatch = 0;
233 for (user = sel_users; !usermatch && *user; user++)
234 if (!strcmp(utmp->ut_user, *user))
235 usermatch = 1;
236 if (!usermatch)
237 continue;
238 }
239 if ((ep = calloc(1, sizeof(struct entry))) == NULL)
240 xo_errx(1, "calloc");
241 *nextp = ep;
242 nextp = &ep->next;
243 memmove(&ep->utmp, utmp, sizeof *utmp);
244 ep->tdev = stp->st_rdev;
245 /*
246 * If this is the console device, attempt to ascertain
247 * the true console device dev_t.
248 */
249 if (ep->tdev == 0) {
250 size_t size;
251
252 size = sizeof(dev_t);
253 (void)sysctlbyname("machdep.consdev", &ep->tdev, &size, NULL, 0);
254 }
255 touched = stp->st_atime;
256 if (touched < ep->utmp.ut_tv.tv_sec) {
257 /* tty untouched since before login */
258 touched = ep->utmp.ut_tv.tv_sec;
259 }
260 if ((ep->idle = now - touched) < 0)
261 ep->idle = 0;
262
263 save_p = p = *ep->utmp.ut_host ? ep->utmp.ut_host : "-";
264 if ((x_suffix = strrchr(p, ':')) != NULL) {
265 if ((dot = strchr(x_suffix, '.')) != NULL &&
266 strchr(dot+1, '.') == NULL)
267 *x_suffix++ = '\0';
268 else
269 x_suffix = NULL;
270 }
271
272 isaddr = 0;
273 memset(&ss, '\0', sizeof(ss));
274 if (inet_pton(AF_INET6, p, &lsin6->sin6_addr) == 1) {
275 lsin6->sin6_len = sizeof(*lsin6);
276 lsin6->sin6_family = AF_INET6;
277 isaddr = 1;
278 } else if (inet_pton(AF_INET, p, &lsin->sin_addr) == 1) {
279 lsin->sin_len = sizeof(*lsin);
280 lsin->sin_family = AF_INET;
281 isaddr = 1;
282 }
283 if (nflag == 0) {
284 /* Attempt to change an IP address into a name */
285 if (isaddr && realhostname_sa(fn, sizeof(fn), sa,
286 sa->sa_len) == HOSTNAME_FOUND)
287 p = fn;
288 } else if (!isaddr && nflag > 1) {
289 /*
290 * If a host has only one A/AAAA RR, change a
291 * name into an IP address
292 */
293 memset(&hints, 0, sizeof(hints));
294 hints.ai_flags = AI_PASSIVE;
295 hints.ai_family = AF_UNSPEC;
296 hints.ai_socktype = SOCK_STREAM;
297 if (getaddrinfo(p, NULL, &hints, &res) == 0) {
298 if (res->ai_next == NULL &&
299 getnameinfo(res->ai_addr, res->ai_addrlen,
300 fn, sizeof(fn), NULL, 0,
301 NI_NUMERICHOST) == 0)
302 p = fn;
303 freeaddrinfo(res);
304 }
305 }
306
307 if (x_suffix) {
308 (void)snprintf(buf, sizeof(buf), "%s:%s", p, x_suffix);
309 p = buf;
310 }
311 ep->from = strdup(p);
312 if ((width = strlen(p)) > fromwidth)
313 fromwidth = width;
314 if (save_p != p)
315 ep->save_from = strdup(save_p);
316 }
317 endutxent();
318
319 #define HEADER_USER "USER"
320 #define HEADER_TTY "TTY"
321 #define HEADER_FROM "FROM"
322 #define HEADER_LOGIN_IDLE "LOGIN@ IDLE "
323 #define HEADER_WHAT "WHAT\n"
324 #define WUSED (W_DISPUSERSIZE + W_DISPLINESIZE + fromwidth + \
325 sizeof(HEADER_LOGIN_IDLE) + 3) /* header width incl. spaces */
326
327 if (sizeof(HEADER_FROM) > fromwidth)
328 fromwidth = sizeof(HEADER_FROM);
329 fromwidth++;
330 if (fromwidth > W_MAXHOSTSIZE)
331 fromwidth = W_MAXHOSTSIZE;
332
333 xo_open_container("uptime-information");
334
335 if (header || wcmd == 0) {
336 pr_header(&now, nusers);
337 if (wcmd == 0) {
338 xo_close_container("uptime-information");
339 if (xo_finish() < 0)
340 xo_err(1, "stdout");
341 (void)kvm_close(kd);
342 exit(0);
343 }
344
345 xo_emit("{T:/%-*.*s} {T:/%-*.*s} {T:/%-*.*s} {T:/%s}",
346 W_DISPUSERSIZE, W_DISPUSERSIZE, HEADER_USER,
347 W_DISPLINESIZE, W_DISPLINESIZE, HEADER_TTY,
348 fromwidth, fromwidth, HEADER_FROM,
349 HEADER_LOGIN_IDLE HEADER_WHAT);
350 }
351
352 if ((kp = kvm_getprocs(kd, KERN_PROC_ALL, 0, &nentries)) == NULL)
353 xo_err(1, "%s", kvm_geterr(kd));
354 for (i = 0; i < nentries; i++, kp++) {
355 if (kp->ki_stat == SIDL || kp->ki_stat == SZOMB ||
356 kp->ki_tdev == NODEV)
357 continue;
358 for (ep = ehead; ep != NULL; ep = ep->next) {
359 if (ep->tdev == kp->ki_tdev) {
360 /*
361 * proc is associated with this terminal
362 */
363 if (ep->kp == NULL && kp->ki_pgid == kp->ki_tpgid) {
364 /*
365 * Proc is 'most interesting'
366 */
367 if (proc_compare(ep->kp, kp))
368 ep->kp = kp;
369 }
370 /*
371 * Proc debug option info; add to debug
372 * list using kinfo_proc ki_spare[0]
373 * as next pointer; ptr to ptr avoids the
374 * ptr = long assumption.
375 */
376 dkp = ep->dkp;
377 ep->dkp = kp;
378 debugproc(kp) = dkp;
379 }
380 }
381 }
382 if ((ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) == -1 &&
383 ioctl(STDERR_FILENO, TIOCGWINSZ, &ws) == -1 &&
384 ioctl(STDIN_FILENO, TIOCGWINSZ, &ws) == -1) || ws.ws_col == 0)
385 ttywidth = 79;
386 else
387 ttywidth = ws.ws_col - 1;
388 argwidth = ttywidth - WUSED;
389 if (argwidth < 4)
390 argwidth = 8;
391 /* Don't truncate if we're outputting json or XML. */
392 if (xo_get_style(NULL) != XO_STYLE_TEXT)
393 argwidth = ARG_MAX;
394 for (ep = ehead; ep != NULL; ep = ep->next) {
395 if (ep->kp == NULL) {
396 ep->args = strdup("-");
397 continue;
398 }
399 ep->args = fmt_argv(kvm_getargv(kd, ep->kp, argwidth),
400 ep->kp->ki_comm, NULL, MAXCOMLEN);
401 if (ep->args == NULL)
402 xo_err(1, "fmt_argv");
403 }
404 /* sort by idle time */
405 if (sortidle && ehead != NULL) {
406 struct entry *from, *save;
407
408 from = ehead;
409 ehead = NULL;
410 while (from != NULL) {
411 for (nextp = &ehead;
412 (*nextp) && from->idle >= (*nextp)->idle;
413 nextp = &(*nextp)->next)
414 continue;
415 save = from;
416 from = from->next;
417 save->next = *nextp;
418 *nextp = save;
419 }
420 }
421
422 xo_open_container("user-table");
423 xo_open_list("user-entry");
424
425 for (ep = ehead; ep != NULL; ep = ep->next) {
426 time_t t;
427
428 xo_open_instance("user-entry");
429
430 if (dflag) {
431 xo_open_container("process-table");
432 xo_open_list("process-entry");
433
434 for (dkp = ep->dkp; dkp != NULL; dkp = debugproc(dkp)) {
435 const char *ptr;
436
437 ptr = fmt_argv(kvm_getargv(kd, dkp, argwidth),
438 dkp->ki_comm, NULL, MAXCOMLEN);
439 if (ptr == NULL)
440 ptr = "-";
441 xo_open_instance("process-entry");
442 xo_emit("\t\t{:process-id/%-9d/%d} "
443 "{:command/%hs}\n", dkp->ki_pid, ptr);
444 xo_close_instance("process-entry");
445 }
446 xo_close_list("process-entry");
447 xo_close_container("process-table");
448 }
449 xo_emit("{:user/%-*.*s/%@**@s} {:tty/%-*.*s/%@**@s} ",
450 W_DISPUSERSIZE, W_DISPUSERSIZE, ep->utmp.ut_user,
451 W_DISPLINESIZE, W_DISPLINESIZE,
452 *ep->utmp.ut_line ?
453 (strncmp(ep->utmp.ut_line, "tty", 3) &&
454 strncmp(ep->utmp.ut_line, "cua", 3) ?
455 ep->utmp.ut_line : ep->utmp.ut_line + 3) : "-");
456
457 if (ep->save_from)
458 xo_attr("address", "%s", ep->save_from);
459 xo_emit("{:from/%-*.*s/%@**@s} ",
460 (int)fromwidth, (int)fromwidth, ep->from);
461 t = ep->utmp.ut_tv.tv_sec;
462 longattime = pr_attime(&t, &now);
463 longidle = pr_idle(ep->idle);
464 xo_emit("{:command/%.*hs/%@*@hs}\n",
465 (int)argwidth - longidle - longattime,
466 ep->args);
467
468 xo_close_instance("user-entry");
469 }
470
471 xo_close_list("user-entry");
472 xo_close_container("user-table");
473 xo_close_container("uptime-information");
474 if (xo_finish() < 0)
475 xo_err(1, "stdout");
476
477 (void)kvm_close(kd);
478 exit(0);
479 }
480
481 static void
pr_header(time_t * nowp,int nusers)482 pr_header(time_t *nowp, int nusers)
483 {
484 char buf[64];
485 struct sbuf upbuf;
486 double avenrun[3];
487 struct timespec tp;
488 unsigned long days, hrs, mins, secs;
489 unsigned int i;
490
491 /*
492 * Print time of day.
493 */
494 if (strftime(buf, sizeof(buf),
495 use_ampm ? "%l:%M%p" : "%k:%M", localtime(nowp)) != 0)
496 xo_emit("{:time-of-day/%s} ", buf);
497 /*
498 * Print how long system has been up.
499 */
500 (void)sbuf_new(&upbuf, buf, sizeof(buf), SBUF_FIXEDLEN);
501 if (clock_gettime(CLOCK_UPTIME, &tp) != -1) {
502 xo_emit(" up");
503 secs = tp.tv_sec;
504 xo_emit("{e:uptime/%lu}", secs);
505 mins = secs / 60;
506 secs %= 60;
507 hrs = mins / 60;
508 mins %= 60;
509 days = hrs / 24;
510 hrs %= 24;
511 xo_emit("{e:days/%ld}{e:hours/%ld}{e:minutes/%ld}{e:seconds/%ld}",
512 days, hrs, mins, secs);
513
514 /* If we've been up longer than 60 s, round to nearest min */
515 if (tp.tv_sec > 60) {
516 secs = tp.tv_sec + 30;
517 mins = secs / 60;
518 secs = 0;
519 hrs = mins / 60;
520 mins %= 60;
521 days = hrs / 24;
522 hrs %= 24;
523 }
524
525 if (days > 0)
526 sbuf_printf(&upbuf, " %ld day%s,",
527 days, days > 1 ? "s" : "");
528 if (hrs > 0 && mins > 0)
529 sbuf_printf(&upbuf, " %2ld:%02ld,", hrs, mins);
530 else if (hrs > 0)
531 sbuf_printf(&upbuf, " %ld hr%s,",
532 hrs, hrs > 1 ? "s" : "");
533 else if (mins > 0)
534 sbuf_printf(&upbuf, " %ld min%s,",
535 mins, mins > 1 ? "s" : "");
536 else
537 sbuf_printf(&upbuf, " %ld sec%s,",
538 secs, secs > 1 ? "s" : "");
539 if (sbuf_finish(&upbuf) != 0)
540 xo_err(1, "Could not generate output");
541 xo_emit("{:uptime-human/%s}", sbuf_data(&upbuf));
542 sbuf_delete(&upbuf);
543 }
544
545 /* Print number of users logged in to system */
546 xo_emit(" {:users/%d} {Np:user,users}", nusers);
547
548 /*
549 * Print 1, 5, and 15 minute load averages.
550 */
551 if (getloadavg(avenrun, nitems(avenrun)) == -1)
552 xo_emit(", no load average information available\n");
553 else {
554 static const char *format[] = {
555 " {:load-average-1/%.2f}",
556 " {:load-average-5/%.2f}",
557 " {:load-average-15/%.2f}",
558 };
559 xo_emit(", load averages:");
560 for (i = 0; i < nitems(avenrun); i++) {
561 if (use_comma && i > 0)
562 xo_emit(",");
563 xo_emit(format[i], avenrun[i]);
564 }
565 xo_emit("\n");
566 }
567 }
568
569 static struct stat *
ttystat(char * line)570 ttystat(char *line)
571 {
572 static struct stat sb;
573 char ttybuf[MAXPATHLEN];
574
575 (void)snprintf(ttybuf, sizeof(ttybuf), "%s%s", _PATH_DEV, line);
576 if (stat(ttybuf, &sb) == 0 && S_ISCHR(sb.st_mode))
577 return (&sb);
578 return (NULL);
579 }
580
581 static void
usage(int wcmd)582 usage(int wcmd)
583 {
584 if (wcmd)
585 xo_error("usage: w [-dhin] [-M core] [-N system] [user ...]\n");
586 else
587 xo_error("usage: uptime\n");
588 xo_finish();
589 exit(1);
590 }
591