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1.4 ! deraadt 1: /* $OpenBSD$ */
! 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>
79: #include <utmp.h>
80: #include <vis.h>
81:
82: #include "extern.h"
83:
84: struct timeval boottime;
85: struct utmp utmp;
86: struct winsize ws;
87: kvm_t *kd;
88: time_t now; /* the current time of day */
89: time_t uptime; /* time of last reboot & elapsed time since */
90: int ttywidth; /* width of tty */
91: int argwidth; /* width of tty */
92: int header = 1; /* true if -h flag: don't print heading */
93: int nflag; /* true if -n flag: don't convert addrs */
94: int sortidle; /* sort bu idle time */
95: char *sel_user; /* login of particular user selected */
96: char domain[MAXHOSTNAMELEN];
97:
98: /*
99: * One of these per active utmp entry.
100: */
101: struct entry {
102: struct entry *next;
103: struct utmp utmp;
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: } *ep, *ehead = NULL, **nextp = &ehead;
108:
109: static void pr_args __P((struct kinfo_proc *));
110: static void pr_header __P((time_t *, int));
111: static struct stat
112: *ttystat __P((char *));
113: static void usage __P((int));
114:
115: int
116: main(argc, argv)
117: int argc;
118: char **argv;
119: {
120: extern char *__progname;
121: struct kinfo_proc *kp;
122: struct hostent *hp;
123: struct stat *stp;
124: FILE *ut;
125: u_long l;
126: int ch, i, nentries, nusers, wcmd;
127: char *memf, *nlistf, *p, *x;
128: char buf[MAXHOSTNAMELEN], errbuf[256];
129:
130: /* Are we w(1) or uptime(1)? */
131: p = __progname;
132: if (*p == '-')
133: p++;
134: if (*p == 'u') {
135: wcmd = 0;
136: p = "";
137: } else {
138: wcmd = 1;
139: p = "hiflM:N:nsuw";
140: }
141:
142: memf = nlistf = NULL;
143: while ((ch = getopt(argc, argv, p)) != EOF)
144: switch (ch) {
145: case 'h':
146: header = 0;
147: break;
148: case 'i':
149: sortidle = 1;
150: break;
151: case 'M':
152: header = 0;
153: memf = optarg;
154: break;
155: case 'N':
156: nlistf = optarg;
157: break;
158: case 'n':
159: nflag = 1;
160: break;
161: case 'f': case 'l': case 's': case 'u': case 'w':
162: warnx("[-flsuw] no longer supported");
163: /* FALLTHROUGH */
164: case '?':
165: default:
166: usage(wcmd);
167: }
168: argc -= optind;
169: argv += optind;
170:
1.3 deraadt 171: /*
172: * Discard setgid privileges if not the running kernel so that bad
173: * guys can't print interesting stuff from kernel memory.
174: */
175: if (nlistf != NULL || memf != NULL)
176: setgid(getgid());
177:
1.1 deraadt 178: if ((kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf)) == NULL)
179: errx(1, "%s", errbuf);
180:
181: (void)time(&now);
182: if ((ut = fopen(_PATH_UTMP, "r")) == NULL)
183: err(1, "%s", _PATH_UTMP);
184:
185: if (*argv)
186: sel_user = *argv;
187:
188: for (nusers = 0; fread(&utmp, sizeof(utmp), 1, ut);) {
189: if (utmp.ut_name[0] == '\0')
190: continue;
191: ++nusers;
192: if (wcmd == 0 || (sel_user &&
193: strncmp(utmp.ut_name, sel_user, UT_NAMESIZE) != 0))
194: continue;
195: if ((ep = calloc(1, sizeof(struct entry))) == NULL)
196: err(1, NULL);
197: *nextp = ep;
198: nextp = &(ep->next);
199: memmove(&(ep->utmp), &utmp, sizeof(struct utmp));
200: if (!(stp = ttystat(ep->utmp.ut_line)))
201: continue;
202: ep->tdev = stp->st_rdev;
203: #ifdef CPU_CONSDEV
204: /*
205: * If this is the console device, attempt to ascertain
206: * the true console device dev_t.
207: */
208: if (ep->tdev == 0) {
209: int mib[2];
210: size_t size;
211:
212: mib[0] = CTL_MACHDEP;
213: mib[1] = CPU_CONSDEV;
214: size = sizeof(dev_t);
215: (void) sysctl(mib, 2, &ep->tdev, &size, NULL, 0);
216: }
217: #endif
218: if ((ep->idle = now - stp->st_atime) < 0)
219: ep->idle = 0;
220: }
221: (void)fclose(ut);
222:
223: if (header || wcmd == 0) {
224: pr_header(&now, nusers);
225: if (wcmd == 0)
226: exit (0);
227: }
228:
229: #define HEADER "USER TTY FROM LOGIN@ IDLE WHAT\n"
230: #define WUSED (sizeof (HEADER) - sizeof ("WHAT\n"))
231: (void)printf(HEADER);
232:
233: if ((kp = kvm_getprocs(kd, KERN_PROC_ALL, 0, &nentries)) == NULL)
1.2 deraadt 234: errx(1, "%s", kvm_geterr(kd));
1.1 deraadt 235: for (i = 0; i < nentries; i++, kp++) {
236: struct proc *p = &kp->kp_proc;
237: struct eproc *e;
238:
239: if (p->p_stat == SIDL || p->p_stat == SZOMB)
240: continue;
241: e = &kp->kp_eproc;
242: for (ep = ehead; ep != NULL; ep = ep->next) {
243: if (ep->tdev == e->e_tdev && e->e_pgid == e->e_tpgid) {
244: /*
245: * Proc is in foreground of this terminal
246: */
247: if (proc_compare(&ep->kp->kp_proc, p))
248: ep->kp = kp;
249: break;
250: }
251: }
252: }
253: if ((ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) == -1 &&
254: ioctl(STDERR_FILENO, TIOCGWINSZ, &ws) == -1 &&
255: ioctl(STDIN_FILENO, TIOCGWINSZ, &ws) == -1) || ws.ws_col == 0)
256: ttywidth = 79;
257: else
258: ttywidth = ws.ws_col - 1;
259: argwidth = ttywidth - WUSED;
260: if (argwidth < 4)
261: argwidth = 8;
262: /* sort by idle time */
263: if (sortidle && ehead != NULL) {
264: struct entry *from = ehead, *save;
265:
266: ehead = NULL;
267: while (from != NULL) {
268: for (nextp = &ehead;
269: (*nextp) && from->idle >= (*nextp)->idle;
270: nextp = &(*nextp)->next)
271: continue;
272: save = from;
273: from = from->next;
274: save->next = *nextp;
275: *nextp = save;
276: }
277: }
278:
279: if (!nflag)
280: if (gethostname(domain, sizeof(domain) - 1) < 0 ||
281: (p = strchr(domain, '.')) == 0)
282: domain[0] = '\0';
283: else {
284: domain[sizeof(domain) - 1] = '\0';
285: memmove(domain, p, strlen(p) + 1);
286: }
287:
288: for (ep = ehead; ep != NULL; ep = ep->next) {
289: p = *ep->utmp.ut_host ? ep->utmp.ut_host : "-";
290: if ((x = strchr(p, ':')) != NULL)
291: *x++ = '\0';
292: if (!nflag && isdigit(*p) &&
293: (long)(l = inet_addr(p)) != -1 &&
294: (hp = gethostbyaddr((char *)&l, sizeof(l), AF_INET))) {
295: if (domain[0] != '\0') {
296: p = hp->h_name;
297: p += strlen(hp->h_name);
298: p -= strlen(domain);
299: if (p > hp->h_name && strcmp(p, domain) == 0)
300: *p = '\0';
301: }
302: p = hp->h_name;
303: }
304: if (x) {
305: (void)snprintf(buf, sizeof(buf), "%s:%.*s", p,
306: ep->utmp.ut_host + UT_HOSTSIZE - x, x);
307: p = buf;
308: }
309: (void)printf("%-*.*s %-2.2s %-*.*s ",
310: UT_NAMESIZE, UT_NAMESIZE, ep->utmp.ut_name,
311: strncmp(ep->utmp.ut_line, "tty", 3) ?
312: ep->utmp.ut_line : ep->utmp.ut_line + 3,
313: UT_HOSTSIZE, UT_HOSTSIZE, *p ? p : "-");
314: pr_attime(&ep->utmp.ut_time, &now);
315: pr_idle(ep->idle);
316: pr_args(ep->kp);
317: printf("\n");
318: }
319: exit(0);
320: }
321:
322: static void
323: pr_args(kp)
324: struct kinfo_proc *kp;
325: {
326: char **argv;
327: int left;
328:
329: if (kp == 0)
330: goto nothing;
331: left = argwidth;
332: argv = kvm_getargv(kd, kp, argwidth);
333: if (argv == 0)
334: goto nothing;
335: while (*argv) {
336: fmt_puts(*argv, &left);
337: argv++;
338: fmt_putc(' ', &left);
339: }
340: return;
341: nothing:
342: putchar('-');
343: }
344:
345: static void
346: pr_header(nowp, nusers)
347: time_t *nowp;
348: int nusers;
349: {
350: double avenrun[3];
351: time_t uptime;
352: int days, hrs, i, mins;
353: int mib[2];
354: size_t size;
355: char buf[256];
356:
357: /*
358: * Print time of day.
359: *
360: * SCCS forces the string manipulation below, as it replaces
361: * %, M, and % in a character string with the file name.
362: */
363: (void)strftime(buf, sizeof(buf),
364: __CONCAT("%l:%","M%p"), localtime(nowp));
365: (void)printf("%s ", buf);
366:
367: /*
368: * Print how long system has been up.
369: * (Found by looking getting "boottime" from the kernel)
370: */
371: mib[0] = CTL_KERN;
372: mib[1] = KERN_BOOTTIME;
373: size = sizeof(boottime);
374: if (sysctl(mib, 2, &boottime, &size, NULL, 0) != -1 &&
375: boottime.tv_sec != 0) {
376: uptime = now - boottime.tv_sec;
377: uptime += 30;
378: days = uptime / SECSPERDAY;
379: uptime %= SECSPERDAY;
380: hrs = uptime / SECSPERHOUR;
381: uptime %= SECSPERHOUR;
382: mins = uptime / SECSPERMIN;
383: (void)printf(" up");
384: if (days > 0)
385: (void)printf(" %d day%s,", days, days > 1 ? "s" : "");
386: if (hrs > 0 && mins > 0)
387: (void)printf(" %2d:%02d,", hrs, mins);
388: else {
389: if (hrs > 0)
390: (void)printf(" %d hr%s,",
391: hrs, hrs > 1 ? "s" : "");
392: if (mins > 0)
393: (void)printf(" %d min%s,",
394: mins, mins > 1 ? "s" : "");
395: }
396: }
397:
398: /* Print number of users logged in to system */
399: (void)printf(" %d user%s", nusers, nusers != 1 ? "s" : "");
400:
401: /*
402: * Print 1, 5, and 15 minute load averages.
403: */
404: if (getloadavg(avenrun, sizeof(avenrun) / sizeof(avenrun[0])) == -1)
405: (void)printf(", no load average information available\n");
406: else {
407: (void)printf(", load averages:");
408: for (i = 0; i < (sizeof(avenrun) / sizeof(avenrun[0])); i++) {
409: if (i > 0)
410: (void)printf(",");
411: (void)printf(" %.2f", avenrun[i]);
412: }
413: (void)printf("\n");
414: }
415: }
416:
417: static struct stat *
418: ttystat(line)
419: char *line;
420: {
421: static struct stat sb;
422: char ttybuf[MAXPATHLEN];
423:
424: (void)snprintf(ttybuf, sizeof(ttybuf), "%s/%s", _PATH_DEV, line);
425: if (stat(ttybuf, &sb))
426: return (NULL);
427: return (&sb);
428: }
429:
430: static void
431: usage(wcmd)
432: int wcmd;
433: {
434: if (wcmd)
435: (void)fprintf(stderr,
436: "usage: w: [-hin] [-M core] [-N system] [user]\n");
437: else
438: (void)fprintf(stderr, "uptime\n");
439: exit (1);
440: }