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1.15 ! millert 1: /* $OpenBSD: w.c,v 1.14 1997/03/25 21:24:12 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 */
1.6 deraadt 94: int nflag = 1; /* true if -n flag: don't convert addrs */
1.1 deraadt 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;
1.6 deraadt 140: p = "hiflM:N:asuw";
1.1 deraadt 141: }
142:
143: memf = nlistf = NULL;
1.12 millert 144: while ((ch = getopt(argc, argv, p)) != -1)
1.1 deraadt 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;
1.6 deraadt 159: case 'a':
160: nflag = 0;
1.1 deraadt 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: */
1.11 tholo 176: if (nlistf != NULL || memf != NULL) {
177: setegid(getgid());
1.3 deraadt 178: setgid(getgid());
1.11 tholo 179: }
1.3 deraadt 180:
1.1 deraadt 181: if ((kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf)) == NULL)
182: errx(1, "%s", errbuf);
183:
184: (void)time(&now);
185: if ((ut = fopen(_PATH_UTMP, "r")) == NULL)
186: err(1, "%s", _PATH_UTMP);
187:
188: if (*argv)
189: sel_user = *argv;
190:
191: for (nusers = 0; fread(&utmp, sizeof(utmp), 1, ut);) {
192: if (utmp.ut_name[0] == '\0')
193: continue;
194: ++nusers;
195: if (wcmd == 0 || (sel_user &&
196: strncmp(utmp.ut_name, sel_user, UT_NAMESIZE) != 0))
197: continue;
198: if ((ep = calloc(1, sizeof(struct entry))) == NULL)
199: err(1, NULL);
200: *nextp = ep;
201: nextp = &(ep->next);
202: memmove(&(ep->utmp), &utmp, sizeof(struct utmp));
203: if (!(stp = ttystat(ep->utmp.ut_line)))
204: continue;
205: ep->tdev = stp->st_rdev;
206: #ifdef CPU_CONSDEV
207: /*
208: * If this is the console device, attempt to ascertain
209: * the true console device dev_t.
210: */
211: if (ep->tdev == 0) {
212: int mib[2];
213: size_t size;
214:
215: mib[0] = CTL_MACHDEP;
216: mib[1] = CPU_CONSDEV;
217: size = sizeof(dev_t);
218: (void) sysctl(mib, 2, &ep->tdev, &size, NULL, 0);
219: }
220: #endif
221: if ((ep->idle = now - stp->st_atime) < 0)
222: ep->idle = 0;
223: }
224: (void)fclose(ut);
225:
226: if (header || wcmd == 0) {
227: pr_header(&now, nusers);
228: if (wcmd == 0)
229: exit (0);
230: }
231:
232: #define HEADER "USER TTY FROM LOGIN@ IDLE WHAT\n"
233: #define WUSED (sizeof (HEADER) - sizeof ("WHAT\n"))
234: (void)printf(HEADER);
235:
236: if ((kp = kvm_getprocs(kd, KERN_PROC_ALL, 0, &nentries)) == NULL)
1.2 deraadt 237: errx(1, "%s", kvm_geterr(kd));
1.1 deraadt 238: for (i = 0; i < nentries; i++, kp++) {
239: struct proc *p = &kp->kp_proc;
240: struct eproc *e;
241:
242: if (p->p_stat == SIDL || p->p_stat == SZOMB)
243: continue;
244: e = &kp->kp_eproc;
245: for (ep = ehead; ep != NULL; ep = ep->next) {
1.7 downsj 246: /* ftp is a special case. */
247: if (strncmp(ep->utmp.ut_line, "ftp", 3) == 0) {
248: pid_t fp = (pid_t)strtol(&ep->utmp.ut_line[3],
249: NULL, 10);
250: if (p->p_pid == fp) {
251: ep->kp = kp;
252:
253: break;
254: }
255: } else if (ep->tdev == e->e_tdev
256: && e->e_pgid == e->e_tpgid) {
1.1 deraadt 257: /*
258: * Proc is in foreground of this terminal
259: */
260: if (proc_compare(&ep->kp->kp_proc, p))
261: ep->kp = kp;
262: break;
263: }
264: }
265: }
266: if ((ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) == -1 &&
267: ioctl(STDERR_FILENO, TIOCGWINSZ, &ws) == -1 &&
268: ioctl(STDIN_FILENO, TIOCGWINSZ, &ws) == -1) || ws.ws_col == 0)
269: ttywidth = 79;
270: else
271: ttywidth = ws.ws_col - 1;
272: argwidth = ttywidth - WUSED;
273: if (argwidth < 4)
274: argwidth = 8;
275: /* sort by idle time */
276: if (sortidle && ehead != NULL) {
277: struct entry *from = ehead, *save;
278:
279: ehead = NULL;
280: while (from != NULL) {
281: for (nextp = &ehead;
282: (*nextp) && from->idle >= (*nextp)->idle;
283: nextp = &(*nextp)->next)
284: continue;
285: save = from;
286: from = from->next;
287: save->next = *nextp;
288: *nextp = save;
289: }
290: }
291:
292: if (!nflag)
293: if (gethostname(domain, sizeof(domain) - 1) < 0 ||
294: (p = strchr(domain, '.')) == 0)
295: domain[0] = '\0';
296: else {
297: domain[sizeof(domain) - 1] = '\0';
298: memmove(domain, p, strlen(p) + 1);
299: }
300:
301: for (ep = ehead; ep != NULL; ep = ep->next) {
302: p = *ep->utmp.ut_host ? ep->utmp.ut_host : "-";
1.15 ! millert 303: if ((x = strchr(p, ':')) != NULL && x - p <= UT_HOSTSIZE)
1.1 deraadt 304: *x++ = '\0';
1.15 ! millert 305: else
! 306: x = NULL;
1.1 deraadt 307: if (!nflag && isdigit(*p) &&
308: (long)(l = inet_addr(p)) != -1 &&
309: (hp = gethostbyaddr((char *)&l, sizeof(l), AF_INET))) {
310: if (domain[0] != '\0') {
311: p = hp->h_name;
312: p += strlen(hp->h_name);
313: p -= strlen(domain);
314: if (p > hp->h_name && strcmp(p, domain) == 0)
315: *p = '\0';
316: }
317: p = hp->h_name;
318: }
319: if (x) {
320: (void)snprintf(buf, sizeof(buf), "%s:%.*s", p,
321: ep->utmp.ut_host + UT_HOSTSIZE - x, x);
322: p = buf;
323: }
324: (void)printf("%-*.*s %-2.2s %-*.*s ",
325: UT_NAMESIZE, UT_NAMESIZE, ep->utmp.ut_name,
326: strncmp(ep->utmp.ut_line, "tty", 3) ?
327: ep->utmp.ut_line : ep->utmp.ut_line + 3,
328: UT_HOSTSIZE, UT_HOSTSIZE, *p ? p : "-");
329: pr_attime(&ep->utmp.ut_time, &now);
330: pr_idle(ep->idle);
331: pr_args(ep->kp);
332: printf("\n");
333: }
334: exit(0);
335: }
336:
337: static void
338: pr_args(kp)
339: struct kinfo_proc *kp;
340: {
1.7 downsj 341: char **argv, *str;
1.1 deraadt 342: int left;
343:
344: if (kp == 0)
345: goto nothing;
346: left = argwidth;
1.9 deraadt 347: argv = kvm_getargv(kd, kp, argwidth+60); /*+60 for ftpd snip */
1.1 deraadt 348: if (argv == 0)
349: goto nothing;
1.7 downsj 350:
1.1 deraadt 351: while (*argv) {
1.7 downsj 352: /* ftp is a special case... */
353: if (strncmp(*argv, "ftpd:", 5) == 0) {
354: str = strrchr(*argv, ':');
355: if (str != (char *)NULL) {
1.8 downsj 356: if ((str[0] == ':') && isspace(str[1]))
1.7 downsj 357: str += 2;
358: fmt_puts(str, &left);
359: } else
360: fmt_puts(*argv, &left);
361: } else
362: fmt_puts(*argv, &left);
1.1 deraadt 363: argv++;
364: fmt_putc(' ', &left);
365: }
366: return;
367: nothing:
368: putchar('-');
369: }
370:
371: static void
372: pr_header(nowp, nusers)
373: time_t *nowp;
374: int nusers;
375: {
376: double avenrun[3];
377: time_t uptime;
378: int days, hrs, i, mins;
379: int mib[2];
380: size_t size;
381: char buf[256];
382:
383: /*
384: * Print time of day.
385: *
386: * SCCS forces the string manipulation below, as it replaces
387: * %, M, and % in a character string with the file name.
388: */
1.14 deraadt 389: (void)strftime(buf, sizeof(buf) - 1,
1.1 deraadt 390: __CONCAT("%l:%","M%p"), localtime(nowp));
1.14 deraadt 391: buf[sizeof buf -1] = '\0';
1.1 deraadt 392: (void)printf("%s ", buf);
393:
394: /*
395: * Print how long system has been up.
396: * (Found by looking getting "boottime" from the kernel)
397: */
398: mib[0] = CTL_KERN;
399: mib[1] = KERN_BOOTTIME;
400: size = sizeof(boottime);
401: if (sysctl(mib, 2, &boottime, &size, NULL, 0) != -1 &&
402: boottime.tv_sec != 0) {
403: uptime = now - boottime.tv_sec;
404: uptime += 30;
405: days = uptime / SECSPERDAY;
406: uptime %= SECSPERDAY;
407: hrs = uptime / SECSPERHOUR;
408: uptime %= SECSPERHOUR;
409: mins = uptime / SECSPERMIN;
410: (void)printf(" up");
411: if (days > 0)
412: (void)printf(" %d day%s,", days, days > 1 ? "s" : "");
413: if (hrs > 0 && mins > 0)
414: (void)printf(" %2d:%02d,", hrs, mins);
415: else {
416: if (hrs > 0)
417: (void)printf(" %d hr%s,",
418: hrs, hrs > 1 ? "s" : "");
1.10 deraadt 419: if (mins > 0 || (days == 0 && hrs == 0))
1.1 deraadt 420: (void)printf(" %d min%s,",
1.10 deraadt 421: mins, mins != 1 ? "s" : "");
1.1 deraadt 422: }
423: }
424:
425: /* Print number of users logged in to system */
426: (void)printf(" %d user%s", nusers, nusers != 1 ? "s" : "");
427:
428: /*
429: * Print 1, 5, and 15 minute load averages.
430: */
431: if (getloadavg(avenrun, sizeof(avenrun) / sizeof(avenrun[0])) == -1)
432: (void)printf(", no load average information available\n");
433: else {
434: (void)printf(", load averages:");
435: for (i = 0; i < (sizeof(avenrun) / sizeof(avenrun[0])); i++) {
436: if (i > 0)
437: (void)printf(",");
438: (void)printf(" %.2f", avenrun[i]);
439: }
440: (void)printf("\n");
441: }
442: }
443:
444: static struct stat *
445: ttystat(line)
446: char *line;
447: {
448: static struct stat sb;
449: char ttybuf[MAXPATHLEN];
450:
451: (void)snprintf(ttybuf, sizeof(ttybuf), "%s/%s", _PATH_DEV, line);
452: if (stat(ttybuf, &sb))
453: return (NULL);
454: return (&sb);
455: }
456:
457: static void
458: usage(wcmd)
459: int wcmd;
460: {
461: if (wcmd)
462: (void)fprintf(stderr,
1.13 angelos 463: "usage: w: [-hia] [-M core] [-N system] [user]\n");
1.1 deraadt 464: else
465: (void)fprintf(stderr, "uptime\n");
466: exit (1);
467: }