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1.1 deraadt 1: /*-
2: * Copyright (c) 1980, 1991, 1993, 1994
3: * The Regents of the University of California. All rights reserved.
4: *
5: * Redistribution and use in source and binary forms, with or without
6: * modification, are permitted provided that the following conditions
7: * are met:
8: * 1. Redistributions of source code must retain the above copyright
9: * notice, this list of conditions and the following disclaimer.
10: * 2. Redistributions in binary form must reproduce the above copyright
11: * notice, this list of conditions and the following disclaimer in the
12: * documentation and/or other materials provided with the distribution.
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.
20: *
21: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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
31: * SUCH DAMAGE.
32: */
33:
34: #ifndef lint
35: static char copyright[] =
36: "@(#) Copyright (c) 1980, 1991, 1993, 1994\n\
37: The Regents of the University of California. All rights reserved.\n";
38: #endif /* not lint */
39:
40: #ifndef lint
41: static char sccsid[] = "@(#)w.c 8.4 (Berkeley) 4/16/94";
42: #endif /* not lint */
43:
44: /*
45: * w - print system status (who and what)
46: *
47: * This program is similar to the systat command on Tenex/Tops 10/20
48: *
49: */
50: #include <sys/param.h>
51: #include <sys/time.h>
52: #include <sys/stat.h>
53: #include <sys/sysctl.h>
54: #include <sys/proc.h>
55: #include <sys/user.h>
56: #include <sys/ioctl.h>
57: #include <sys/socket.h>
58: #include <sys/tty.h>
59:
60: #include <machine/cpu.h>
61: #include <netinet/in.h>
62: #include <arpa/inet.h>
63:
64: #include <ctype.h>
65: #include <err.h>
66: #include <errno.h>
67: #include <fcntl.h>
68: #include <kvm.h>
69: #include <netdb.h>
70: #include <nlist.h>
71: #include <paths.h>
72: #include <stdio.h>
73: #include <stdlib.h>
74: #include <string.h>
75: #include <tzfile.h>
76: #include <unistd.h>
77: #include <utmp.h>
78: #include <vis.h>
79:
80: #include "extern.h"
81:
82: struct timeval boottime;
83: struct utmp utmp;
84: struct winsize ws;
85: kvm_t *kd;
86: time_t now; /* the current time of day */
87: time_t uptime; /* time of last reboot & elapsed time since */
88: int ttywidth; /* width of tty */
89: int argwidth; /* width of tty */
90: int header = 1; /* true if -h flag: don't print heading */
91: int nflag; /* true if -n flag: don't convert addrs */
92: int sortidle; /* sort bu idle time */
93: char *sel_user; /* login of particular user selected */
94: char domain[MAXHOSTNAMELEN];
95:
96: /*
97: * One of these per active utmp entry.
98: */
99: struct entry {
100: struct entry *next;
101: struct utmp utmp;
102: dev_t tdev; /* dev_t of terminal */
103: time_t idle; /* idle time of terminal in seconds */
104: struct kinfo_proc *kp; /* `most interesting' proc */
105: } *ep, *ehead = NULL, **nextp = &ehead;
106:
107: static void pr_args __P((struct kinfo_proc *));
108: static void pr_header __P((time_t *, int));
109: static struct stat
110: *ttystat __P((char *));
111: static void usage __P((int));
112:
113: int
114: main(argc, argv)
115: int argc;
116: char **argv;
117: {
118: extern char *__progname;
119: struct kinfo_proc *kp;
120: struct hostent *hp;
121: struct stat *stp;
122: FILE *ut;
123: u_long l;
124: int ch, i, nentries, nusers, wcmd;
125: char *memf, *nlistf, *p, *x;
126: char buf[MAXHOSTNAMELEN], errbuf[256];
127:
128: /* Are we w(1) or uptime(1)? */
129: p = __progname;
130: if (*p == '-')
131: p++;
132: if (*p == 'u') {
133: wcmd = 0;
134: p = "";
135: } else {
136: wcmd = 1;
137: p = "hiflM:N:nsuw";
138: }
139:
140: memf = nlistf = NULL;
141: while ((ch = getopt(argc, argv, p)) != EOF)
142: switch (ch) {
143: case 'h':
144: header = 0;
145: break;
146: case 'i':
147: sortidle = 1;
148: break;
149: case 'M':
150: header = 0;
151: memf = optarg;
152: break;
153: case 'N':
154: nlistf = optarg;
155: break;
156: case 'n':
157: nflag = 1;
158: break;
159: case 'f': case 'l': case 's': case 'u': case 'w':
160: warnx("[-flsuw] no longer supported");
161: /* FALLTHROUGH */
162: case '?':
163: default:
164: usage(wcmd);
165: }
166: argc -= optind;
167: argv += optind;
168:
1.3 ! deraadt 169: /*
! 170: * Discard setgid privileges if not the running kernel so that bad
! 171: * guys can't print interesting stuff from kernel memory.
! 172: */
! 173: if (nlistf != NULL || memf != NULL)
! 174: setgid(getgid());
! 175:
1.1 deraadt 176: if ((kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf)) == NULL)
177: errx(1, "%s", errbuf);
178:
179: (void)time(&now);
180: if ((ut = fopen(_PATH_UTMP, "r")) == NULL)
181: err(1, "%s", _PATH_UTMP);
182:
183: if (*argv)
184: sel_user = *argv;
185:
186: for (nusers = 0; fread(&utmp, sizeof(utmp), 1, ut);) {
187: if (utmp.ut_name[0] == '\0')
188: continue;
189: ++nusers;
190: if (wcmd == 0 || (sel_user &&
191: strncmp(utmp.ut_name, sel_user, UT_NAMESIZE) != 0))
192: continue;
193: if ((ep = calloc(1, sizeof(struct entry))) == NULL)
194: err(1, NULL);
195: *nextp = ep;
196: nextp = &(ep->next);
197: memmove(&(ep->utmp), &utmp, sizeof(struct utmp));
198: if (!(stp = ttystat(ep->utmp.ut_line)))
199: continue;
200: ep->tdev = stp->st_rdev;
201: #ifdef CPU_CONSDEV
202: /*
203: * If this is the console device, attempt to ascertain
204: * the true console device dev_t.
205: */
206: if (ep->tdev == 0) {
207: int mib[2];
208: size_t size;
209:
210: mib[0] = CTL_MACHDEP;
211: mib[1] = CPU_CONSDEV;
212: size = sizeof(dev_t);
213: (void) sysctl(mib, 2, &ep->tdev, &size, NULL, 0);
214: }
215: #endif
216: if ((ep->idle = now - stp->st_atime) < 0)
217: ep->idle = 0;
218: }
219: (void)fclose(ut);
220:
221: if (header || wcmd == 0) {
222: pr_header(&now, nusers);
223: if (wcmd == 0)
224: exit (0);
225: }
226:
227: #define HEADER "USER TTY FROM LOGIN@ IDLE WHAT\n"
228: #define WUSED (sizeof (HEADER) - sizeof ("WHAT\n"))
229: (void)printf(HEADER);
230:
231: if ((kp = kvm_getprocs(kd, KERN_PROC_ALL, 0, &nentries)) == NULL)
1.2 deraadt 232: errx(1, "%s", kvm_geterr(kd));
1.1 deraadt 233: for (i = 0; i < nentries; i++, kp++) {
234: struct proc *p = &kp->kp_proc;
235: struct eproc *e;
236:
237: if (p->p_stat == SIDL || p->p_stat == SZOMB)
238: continue;
239: e = &kp->kp_eproc;
240: for (ep = ehead; ep != NULL; ep = ep->next) {
241: if (ep->tdev == e->e_tdev && e->e_pgid == e->e_tpgid) {
242: /*
243: * Proc is in foreground of this terminal
244: */
245: if (proc_compare(&ep->kp->kp_proc, p))
246: ep->kp = kp;
247: break;
248: }
249: }
250: }
251: if ((ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) == -1 &&
252: ioctl(STDERR_FILENO, TIOCGWINSZ, &ws) == -1 &&
253: ioctl(STDIN_FILENO, TIOCGWINSZ, &ws) == -1) || ws.ws_col == 0)
254: ttywidth = 79;
255: else
256: ttywidth = ws.ws_col - 1;
257: argwidth = ttywidth - WUSED;
258: if (argwidth < 4)
259: argwidth = 8;
260: /* sort by idle time */
261: if (sortidle && ehead != NULL) {
262: struct entry *from = ehead, *save;
263:
264: ehead = NULL;
265: while (from != NULL) {
266: for (nextp = &ehead;
267: (*nextp) && from->idle >= (*nextp)->idle;
268: nextp = &(*nextp)->next)
269: continue;
270: save = from;
271: from = from->next;
272: save->next = *nextp;
273: *nextp = save;
274: }
275: }
276:
277: if (!nflag)
278: if (gethostname(domain, sizeof(domain) - 1) < 0 ||
279: (p = strchr(domain, '.')) == 0)
280: domain[0] = '\0';
281: else {
282: domain[sizeof(domain) - 1] = '\0';
283: memmove(domain, p, strlen(p) + 1);
284: }
285:
286: for (ep = ehead; ep != NULL; ep = ep->next) {
287: p = *ep->utmp.ut_host ? ep->utmp.ut_host : "-";
288: if ((x = strchr(p, ':')) != NULL)
289: *x++ = '\0';
290: if (!nflag && isdigit(*p) &&
291: (long)(l = inet_addr(p)) != -1 &&
292: (hp = gethostbyaddr((char *)&l, sizeof(l), AF_INET))) {
293: if (domain[0] != '\0') {
294: p = hp->h_name;
295: p += strlen(hp->h_name);
296: p -= strlen(domain);
297: if (p > hp->h_name && strcmp(p, domain) == 0)
298: *p = '\0';
299: }
300: p = hp->h_name;
301: }
302: if (x) {
303: (void)snprintf(buf, sizeof(buf), "%s:%.*s", p,
304: ep->utmp.ut_host + UT_HOSTSIZE - x, x);
305: p = buf;
306: }
307: (void)printf("%-*.*s %-2.2s %-*.*s ",
308: UT_NAMESIZE, UT_NAMESIZE, ep->utmp.ut_name,
309: strncmp(ep->utmp.ut_line, "tty", 3) ?
310: ep->utmp.ut_line : ep->utmp.ut_line + 3,
311: UT_HOSTSIZE, UT_HOSTSIZE, *p ? p : "-");
312: pr_attime(&ep->utmp.ut_time, &now);
313: pr_idle(ep->idle);
314: pr_args(ep->kp);
315: printf("\n");
316: }
317: exit(0);
318: }
319:
320: static void
321: pr_args(kp)
322: struct kinfo_proc *kp;
323: {
324: char **argv;
325: int left;
326:
327: if (kp == 0)
328: goto nothing;
329: left = argwidth;
330: argv = kvm_getargv(kd, kp, argwidth);
331: if (argv == 0)
332: goto nothing;
333: while (*argv) {
334: fmt_puts(*argv, &left);
335: argv++;
336: fmt_putc(' ', &left);
337: }
338: return;
339: nothing:
340: putchar('-');
341: }
342:
343: static void
344: pr_header(nowp, nusers)
345: time_t *nowp;
346: int nusers;
347: {
348: double avenrun[3];
349: time_t uptime;
350: int days, hrs, i, mins;
351: int mib[2];
352: size_t size;
353: char buf[256];
354:
355: /*
356: * Print time of day.
357: *
358: * SCCS forces the string manipulation below, as it replaces
359: * %, M, and % in a character string with the file name.
360: */
361: (void)strftime(buf, sizeof(buf),
362: __CONCAT("%l:%","M%p"), localtime(nowp));
363: (void)printf("%s ", buf);
364:
365: /*
366: * Print how long system has been up.
367: * (Found by looking getting "boottime" from the kernel)
368: */
369: mib[0] = CTL_KERN;
370: mib[1] = KERN_BOOTTIME;
371: size = sizeof(boottime);
372: if (sysctl(mib, 2, &boottime, &size, NULL, 0) != -1 &&
373: boottime.tv_sec != 0) {
374: uptime = now - boottime.tv_sec;
375: uptime += 30;
376: days = uptime / SECSPERDAY;
377: uptime %= SECSPERDAY;
378: hrs = uptime / SECSPERHOUR;
379: uptime %= SECSPERHOUR;
380: mins = uptime / SECSPERMIN;
381: (void)printf(" up");
382: if (days > 0)
383: (void)printf(" %d day%s,", days, days > 1 ? "s" : "");
384: if (hrs > 0 && mins > 0)
385: (void)printf(" %2d:%02d,", hrs, mins);
386: else {
387: if (hrs > 0)
388: (void)printf(" %d hr%s,",
389: hrs, hrs > 1 ? "s" : "");
390: if (mins > 0)
391: (void)printf(" %d min%s,",
392: mins, mins > 1 ? "s" : "");
393: }
394: }
395:
396: /* Print number of users logged in to system */
397: (void)printf(" %d user%s", nusers, nusers != 1 ? "s" : "");
398:
399: /*
400: * Print 1, 5, and 15 minute load averages.
401: */
402: if (getloadavg(avenrun, sizeof(avenrun) / sizeof(avenrun[0])) == -1)
403: (void)printf(", no load average information available\n");
404: else {
405: (void)printf(", load averages:");
406: for (i = 0; i < (sizeof(avenrun) / sizeof(avenrun[0])); i++) {
407: if (i > 0)
408: (void)printf(",");
409: (void)printf(" %.2f", avenrun[i]);
410: }
411: (void)printf("\n");
412: }
413: }
414:
415: static struct stat *
416: ttystat(line)
417: char *line;
418: {
419: static struct stat sb;
420: char ttybuf[MAXPATHLEN];
421:
422: (void)snprintf(ttybuf, sizeof(ttybuf), "%s/%s", _PATH_DEV, line);
423: if (stat(ttybuf, &sb))
424: return (NULL);
425: return (&sb);
426: }
427:
428: static void
429: usage(wcmd)
430: int wcmd;
431: {
432: if (wcmd)
433: (void)fprintf(stderr,
434: "usage: w: [-hin] [-M core] [-N system] [user]\n");
435: else
436: (void)fprintf(stderr, "uptime\n");
437: exit (1);
438: }