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
main(argc,argv)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
pr_header(nowp,nusers)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 *
ttystat(line)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
usage(wcmd)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