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1.5 ! deraadt 1: /* $OpenBSD: w.c,v 1.4 1996/06/26 05:42:45 deraadt Exp $ */
1.4 deraadt 2:
1.1 deraadt 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. All advertising materials mentioning features or use of this software
16: * must display the following acknowledgement:
17: * This product includes software developed by the University of
18: * California, Berkeley and its contributors.
19: * 4. Neither the name of the University nor the names of its contributors
20: * may be used to endorse or promote products derived from this software
21: * without specific prior written permission.
22: *
23: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33: * SUCH DAMAGE.
34: */
35:
36: #ifndef lint
37: static char copyright[] =
38: "@(#) Copyright (c) 1980, 1991, 1993, 1994\n\
39: The Regents of the University of California. All rights reserved.\n";
40: #endif /* not lint */
41:
42: #ifndef lint
43: static char sccsid[] = "@(#)w.c 8.4 (Berkeley) 4/16/94";
44: #endif /* not lint */
45:
46: /*
47: * w - print system status (who and what)
48: *
49: * This program is similar to the systat command on Tenex/Tops 10/20
50: *
51: */
52: #include <sys/param.h>
53: #include <sys/time.h>
54: #include <sys/stat.h>
55: #include <sys/sysctl.h>
56: #include <sys/proc.h>
57: #include <sys/user.h>
58: #include <sys/ioctl.h>
59: #include <sys/socket.h>
60: #include <sys/tty.h>
61:
62: #include <machine/cpu.h>
63: #include <netinet/in.h>
64: #include <arpa/inet.h>
65:
66: #include <ctype.h>
67: #include <err.h>
68: #include <errno.h>
69: #include <fcntl.h>
70: #include <kvm.h>
71: #include <netdb.h>
72: #include <nlist.h>
73: #include <paths.h>
74: #include <stdio.h>
75: #include <stdlib.h>
76: #include <string.h>
77: #include <tzfile.h>
78: #include <unistd.h>
1.5 ! deraadt 79: #include <limits.h>
1.1 deraadt 80: #include <utmp.h>
81: #include <vis.h>
82:
83: #include "extern.h"
84:
85: struct timeval boottime;
86: struct utmp utmp;
87: struct winsize ws;
88: kvm_t *kd;
89: time_t now; /* the current time of day */
90: time_t uptime; /* time of last reboot & elapsed time since */
91: int ttywidth; /* width of tty */
92: int argwidth; /* width of tty */
93: int header = 1; /* true if -h flag: don't print heading */
94: int nflag; /* true if -n flag: don't convert addrs */
95: int sortidle; /* sort bu idle time */
96: char *sel_user; /* login of particular user selected */
97: char domain[MAXHOSTNAMELEN];
98:
99: /*
100: * One of these per active utmp entry.
101: */
102: struct entry {
103: struct entry *next;
104: struct utmp utmp;
105: dev_t tdev; /* dev_t of terminal */
106: time_t idle; /* idle time of terminal in seconds */
107: struct kinfo_proc *kp; /* `most interesting' proc */
108: } *ep, *ehead = NULL, **nextp = &ehead;
109:
110: static void pr_args __P((struct kinfo_proc *));
111: static void pr_header __P((time_t *, int));
112: static struct stat
113: *ttystat __P((char *));
114: static void usage __P((int));
115:
116: int
117: main(argc, argv)
118: int argc;
119: char **argv;
120: {
121: extern char *__progname;
122: struct kinfo_proc *kp;
123: struct hostent *hp;
124: struct stat *stp;
125: FILE *ut;
126: u_long l;
127: int ch, i, nentries, nusers, wcmd;
128: char *memf, *nlistf, *p, *x;
1.5 ! deraadt 129: char buf[MAXHOSTNAMELEN], errbuf[_POSIX2_LINE_MAX];
1.1 deraadt 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:
1.3 deraadt 172: /*
173: * Discard setgid privileges if not the running kernel so that bad
174: * guys can't print interesting stuff from kernel memory.
175: */
176: if (nlistf != NULL || memf != NULL)
177: setgid(getgid());
178:
1.1 deraadt 179: if ((kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf)) == NULL)
180: errx(1, "%s", errbuf);
181:
182: (void)time(&now);
183: if ((ut = fopen(_PATH_UTMP, "r")) == NULL)
184: err(1, "%s", _PATH_UTMP);
185:
186: if (*argv)
187: sel_user = *argv;
188:
189: for (nusers = 0; fread(&utmp, sizeof(utmp), 1, ut);) {
190: if (utmp.ut_name[0] == '\0')
191: continue;
192: ++nusers;
193: if (wcmd == 0 || (sel_user &&
194: strncmp(utmp.ut_name, sel_user, UT_NAMESIZE) != 0))
195: continue;
196: if ((ep = calloc(1, sizeof(struct entry))) == NULL)
197: err(1, NULL);
198: *nextp = ep;
199: nextp = &(ep->next);
200: memmove(&(ep->utmp), &utmp, sizeof(struct utmp));
201: if (!(stp = ttystat(ep->utmp.ut_line)))
202: continue;
203: ep->tdev = stp->st_rdev;
204: #ifdef CPU_CONSDEV
205: /*
206: * If this is the console device, attempt to ascertain
207: * the true console device dev_t.
208: */
209: if (ep->tdev == 0) {
210: int mib[2];
211: size_t size;
212:
213: mib[0] = CTL_MACHDEP;
214: mib[1] = CPU_CONSDEV;
215: size = sizeof(dev_t);
216: (void) sysctl(mib, 2, &ep->tdev, &size, NULL, 0);
217: }
218: #endif
219: if ((ep->idle = now - stp->st_atime) < 0)
220: ep->idle = 0;
221: }
222: (void)fclose(ut);
223:
224: if (header || wcmd == 0) {
225: pr_header(&now, nusers);
226: if (wcmd == 0)
227: exit (0);
228: }
229:
230: #define HEADER "USER TTY FROM LOGIN@ IDLE WHAT\n"
231: #define WUSED (sizeof (HEADER) - sizeof ("WHAT\n"))
232: (void)printf(HEADER);
233:
234: if ((kp = kvm_getprocs(kd, KERN_PROC_ALL, 0, &nentries)) == NULL)
1.2 deraadt 235: errx(1, "%s", kvm_geterr(kd));
1.1 deraadt 236: for (i = 0; i < nentries; i++, kp++) {
237: struct proc *p = &kp->kp_proc;
238: struct eproc *e;
239:
240: if (p->p_stat == SIDL || p->p_stat == SZOMB)
241: continue;
242: e = &kp->kp_eproc;
243: for (ep = ehead; ep != NULL; ep = ep->next) {
244: if (ep->tdev == e->e_tdev && e->e_pgid == e->e_tpgid) {
245: /*
246: * Proc is in foreground of this terminal
247: */
248: if (proc_compare(&ep->kp->kp_proc, p))
249: ep->kp = kp;
250: break;
251: }
252: }
253: }
254: if ((ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) == -1 &&
255: ioctl(STDERR_FILENO, TIOCGWINSZ, &ws) == -1 &&
256: ioctl(STDIN_FILENO, TIOCGWINSZ, &ws) == -1) || ws.ws_col == 0)
257: ttywidth = 79;
258: else
259: ttywidth = ws.ws_col - 1;
260: argwidth = ttywidth - WUSED;
261: if (argwidth < 4)
262: argwidth = 8;
263: /* sort by idle time */
264: if (sortidle && ehead != NULL) {
265: struct entry *from = ehead, *save;
266:
267: ehead = NULL;
268: while (from != NULL) {
269: for (nextp = &ehead;
270: (*nextp) && from->idle >= (*nextp)->idle;
271: nextp = &(*nextp)->next)
272: continue;
273: save = from;
274: from = from->next;
275: save->next = *nextp;
276: *nextp = save;
277: }
278: }
279:
280: if (!nflag)
281: if (gethostname(domain, sizeof(domain) - 1) < 0 ||
282: (p = strchr(domain, '.')) == 0)
283: domain[0] = '\0';
284: else {
285: domain[sizeof(domain) - 1] = '\0';
286: memmove(domain, p, strlen(p) + 1);
287: }
288:
289: for (ep = ehead; ep != NULL; ep = ep->next) {
290: p = *ep->utmp.ut_host ? ep->utmp.ut_host : "-";
291: if ((x = strchr(p, ':')) != NULL)
292: *x++ = '\0';
293: if (!nflag && isdigit(*p) &&
294: (long)(l = inet_addr(p)) != -1 &&
295: (hp = gethostbyaddr((char *)&l, sizeof(l), AF_INET))) {
296: if (domain[0] != '\0') {
297: p = hp->h_name;
298: p += strlen(hp->h_name);
299: p -= strlen(domain);
300: if (p > hp->h_name && strcmp(p, domain) == 0)
301: *p = '\0';
302: }
303: p = hp->h_name;
304: }
305: if (x) {
306: (void)snprintf(buf, sizeof(buf), "%s:%.*s", p,
307: ep->utmp.ut_host + UT_HOSTSIZE - x, x);
308: p = buf;
309: }
310: (void)printf("%-*.*s %-2.2s %-*.*s ",
311: UT_NAMESIZE, UT_NAMESIZE, ep->utmp.ut_name,
312: strncmp(ep->utmp.ut_line, "tty", 3) ?
313: ep->utmp.ut_line : ep->utmp.ut_line + 3,
314: UT_HOSTSIZE, UT_HOSTSIZE, *p ? p : "-");
315: pr_attime(&ep->utmp.ut_time, &now);
316: pr_idle(ep->idle);
317: pr_args(ep->kp);
318: printf("\n");
319: }
320: exit(0);
321: }
322:
323: static void
324: pr_args(kp)
325: struct kinfo_proc *kp;
326: {
327: char **argv;
328: int left;
329:
330: if (kp == 0)
331: goto nothing;
332: left = argwidth;
333: argv = kvm_getargv(kd, kp, argwidth);
334: if (argv == 0)
335: goto nothing;
336: while (*argv) {
337: fmt_puts(*argv, &left);
338: argv++;
339: fmt_putc(' ', &left);
340: }
341: return;
342: nothing:
343: putchar('-');
344: }
345:
346: static void
347: pr_header(nowp, nusers)
348: time_t *nowp;
349: int nusers;
350: {
351: double avenrun[3];
352: time_t uptime;
353: int days, hrs, i, mins;
354: int mib[2];
355: size_t size;
356: char buf[256];
357:
358: /*
359: * Print time of day.
360: *
361: * SCCS forces the string manipulation below, as it replaces
362: * %, M, and % in a character string with the file name.
363: */
364: (void)strftime(buf, sizeof(buf),
365: __CONCAT("%l:%","M%p"), localtime(nowp));
366: (void)printf("%s ", buf);
367:
368: /*
369: * Print how long system has been up.
370: * (Found by looking getting "boottime" from the kernel)
371: */
372: mib[0] = CTL_KERN;
373: mib[1] = KERN_BOOTTIME;
374: size = sizeof(boottime);
375: if (sysctl(mib, 2, &boottime, &size, NULL, 0) != -1 &&
376: boottime.tv_sec != 0) {
377: uptime = now - boottime.tv_sec;
378: uptime += 30;
379: days = uptime / SECSPERDAY;
380: uptime %= SECSPERDAY;
381: hrs = uptime / SECSPERHOUR;
382: uptime %= SECSPERHOUR;
383: mins = uptime / SECSPERMIN;
384: (void)printf(" up");
385: if (days > 0)
386: (void)printf(" %d day%s,", days, days > 1 ? "s" : "");
387: if (hrs > 0 && mins > 0)
388: (void)printf(" %2d:%02d,", hrs, mins);
389: else {
390: if (hrs > 0)
391: (void)printf(" %d hr%s,",
392: hrs, hrs > 1 ? "s" : "");
393: if (mins > 0)
394: (void)printf(" %d min%s,",
395: mins, mins > 1 ? "s" : "");
396: }
397: }
398:
399: /* Print number of users logged in to system */
400: (void)printf(" %d user%s", nusers, nusers != 1 ? "s" : "");
401:
402: /*
403: * Print 1, 5, and 15 minute load averages.
404: */
405: if (getloadavg(avenrun, sizeof(avenrun) / sizeof(avenrun[0])) == -1)
406: (void)printf(", no load average information available\n");
407: else {
408: (void)printf(", load averages:");
409: for (i = 0; i < (sizeof(avenrun) / sizeof(avenrun[0])); i++) {
410: if (i > 0)
411: (void)printf(",");
412: (void)printf(" %.2f", avenrun[i]);
413: }
414: (void)printf("\n");
415: }
416: }
417:
418: static struct stat *
419: ttystat(line)
420: char *line;
421: {
422: static struct stat sb;
423: char ttybuf[MAXPATHLEN];
424:
425: (void)snprintf(ttybuf, sizeof(ttybuf), "%s/%s", _PATH_DEV, line);
426: if (stat(ttybuf, &sb))
427: return (NULL);
428: return (&sb);
429: }
430:
431: static void
432: usage(wcmd)
433: int wcmd;
434: {
435: if (wcmd)
436: (void)fprintf(stderr,
437: "usage: w: [-hin] [-M core] [-N system] [user]\n");
438: else
439: (void)fprintf(stderr, "uptime\n");
440: exit (1);
441: }