Annotation of src/usr.bin/w/w.c, Revision 1.36
1.36 ! mpech 1: /* $OpenBSD: w.c,v 1.35 2002/02/16 21:27:58 millert 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
1.23 millert 43: #if 0
1.1 deraadt 44: static char sccsid[] = "@(#)w.c 8.4 (Berkeley) 4/16/94";
1.23 millert 45: #else
1.36 ! mpech 46: static char *rcsid = "$OpenBSD: w.c,v 1.35 2002/02/16 21:27:58 millert Exp $";
1.23 millert 47: #endif
1.1 deraadt 48: #endif /* not lint */
49:
50: /*
51: * w - print system status (who and what)
52: *
53: * This program is similar to the systat command on Tenex/Tops 10/20
54: *
55: */
56: #include <sys/param.h>
57: #include <sys/time.h>
58: #include <sys/stat.h>
59: #include <sys/sysctl.h>
60: #include <sys/proc.h>
61: #include <sys/user.h>
62: #include <sys/ioctl.h>
63: #include <sys/socket.h>
64: #include <sys/tty.h>
65:
66: #include <machine/cpu.h>
67: #include <netinet/in.h>
68: #include <arpa/inet.h>
69:
70: #include <ctype.h>
71: #include <err.h>
72: #include <errno.h>
73: #include <fcntl.h>
74: #include <kvm.h>
75: #include <netdb.h>
76: #include <nlist.h>
77: #include <paths.h>
78: #include <stdio.h>
79: #include <stdlib.h>
80: #include <string.h>
81: #include <tzfile.h>
82: #include <unistd.h>
1.5 deraadt 83: #include <limits.h>
1.1 deraadt 84: #include <utmp.h>
85: #include <vis.h>
86:
87: #include "extern.h"
88:
89: struct timeval boottime;
90: struct utmp utmp;
91: struct winsize ws;
92: kvm_t *kd;
93: time_t now; /* the current time of day */
94: time_t uptime; /* time of last reboot & elapsed time since */
95: int ttywidth; /* width of tty */
96: int argwidth; /* width of tty */
97: int header = 1; /* true if -h flag: don't print heading */
1.6 deraadt 98: int nflag = 1; /* true if -n flag: don't convert addrs */
1.1 deraadt 99: int sortidle; /* sort bu idle time */
100: char *sel_user; /* login of particular user selected */
101: char domain[MAXHOSTNAMELEN];
102:
1.32 deraadt 103: #define NAME_WIDTH 8
104: #define HOST_WIDTH 16
105:
1.1 deraadt 106: /*
107: * One of these per active utmp entry.
108: */
109: struct entry {
110: struct entry *next;
111: struct utmp utmp;
112: dev_t tdev; /* dev_t of terminal */
113: time_t idle; /* idle time of terminal in seconds */
114: struct kinfo_proc *kp; /* `most interesting' proc */
115: } *ep, *ehead = NULL, **nextp = &ehead;
116:
1.35 millert 117: static void pr_args(struct kinfo_proc *);
118: static void pr_header(time_t *, int);
1.1 deraadt 119: static struct stat
1.35 millert 120: *ttystat(char *);
121: static void usage(int);
1.1 deraadt 122:
123: int
124: main(argc, argv)
125: int argc;
126: char **argv;
127: {
128: extern char *__progname;
129: struct kinfo_proc *kp;
130: struct hostent *hp;
131: struct stat *stp;
132: FILE *ut;
1.27 deraadt 133: struct in_addr addr;
1.1 deraadt 134: int ch, i, nentries, nusers, wcmd;
135: char *memf, *nlistf, *p, *x;
1.5 deraadt 136: char buf[MAXHOSTNAMELEN], errbuf[_POSIX2_LINE_MAX];
1.1 deraadt 137:
138: /* Are we w(1) or uptime(1)? */
139: p = __progname;
140: if (*p == '-')
141: p++;
1.19 mickey 142: if (p[0] == 'w' && p[1] == '\0') {
143: wcmd = 1;
144: p = "hiflM:N:asuw";
145: } else if (!strcmp(p, "uptime")) {
1.1 deraadt 146: wcmd = 0;
1.28 millert 147: p = "M:N:";
1.19 mickey 148: } else
1.20 kstailey 149: errx(1,
150: "this program should be invoked only as \"w\" or \"uptime\"");
1.1 deraadt 151:
152: memf = nlistf = NULL;
1.12 millert 153: while ((ch = getopt(argc, argv, p)) != -1)
1.1 deraadt 154: switch (ch) {
155: case 'h':
156: header = 0;
157: break;
158: case 'i':
159: sortidle = 1;
160: break;
161: case 'M':
162: header = 0;
163: memf = optarg;
164: break;
165: case 'N':
166: nlistf = optarg;
167: break;
1.6 deraadt 168: case 'a':
169: nflag = 0;
1.1 deraadt 170: break;
171: case 'f': case 'l': case 's': case 'u': case 'w':
172: warnx("[-flsuw] no longer supported");
173: /* FALLTHROUGH */
174: case '?':
175: default:
176: usage(wcmd);
177: }
178: argc -= optind;
179: argv += optind;
180:
1.3 deraadt 181: /*
182: * Discard setgid privileges if not the running kernel so that bad
183: * guys can't print interesting stuff from kernel memory.
184: */
1.11 tholo 185: if (nlistf != NULL || memf != NULL) {
186: setegid(getgid());
1.3 deraadt 187: setgid(getgid());
1.11 tholo 188: }
1.3 deraadt 189:
1.1 deraadt 190: if ((kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf)) == NULL)
191: errx(1, "%s", errbuf);
1.25 deraadt 192:
193: setegid(getgid());
194: setgid(getgid());
1.1 deraadt 195:
196: (void)time(&now);
197: if ((ut = fopen(_PATH_UTMP, "r")) == NULL)
198: err(1, "%s", _PATH_UTMP);
199:
200: if (*argv)
201: sel_user = *argv;
202:
203: for (nusers = 0; fread(&utmp, sizeof(utmp), 1, ut);) {
204: if (utmp.ut_name[0] == '\0')
205: continue;
206: ++nusers;
207: if (wcmd == 0 || (sel_user &&
208: strncmp(utmp.ut_name, sel_user, UT_NAMESIZE) != 0))
209: continue;
1.33 smart 210: if ((ep = calloc(1, sizeof(*ep))) == NULL)
1.1 deraadt 211: err(1, NULL);
212: *nextp = ep;
213: nextp = &(ep->next);
1.33 smart 214: memcpy(&(ep->utmp), &utmp, sizeof(utmp));
1.1 deraadt 215: if (!(stp = ttystat(ep->utmp.ut_line)))
216: continue;
217: ep->tdev = stp->st_rdev;
218: #ifdef CPU_CONSDEV
219: /*
220: * If this is the console device, attempt to ascertain
221: * the true console device dev_t.
222: */
223: if (ep->tdev == 0) {
224: int mib[2];
225: size_t size;
226:
227: mib[0] = CTL_MACHDEP;
228: mib[1] = CPU_CONSDEV;
229: size = sizeof(dev_t);
230: (void) sysctl(mib, 2, &ep->tdev, &size, NULL, 0);
231: }
232: #endif
233: if ((ep->idle = now - stp->st_atime) < 0)
234: ep->idle = 0;
235: }
236: (void)fclose(ut);
237:
238: if (header || wcmd == 0) {
239: pr_header(&now, nusers);
240: if (wcmd == 0)
241: exit (0);
242: }
243:
1.30 deraadt 244: #define HEADER "USER TTY FROM LOGIN@ IDLE WHAT"
1.33 smart 245: #define WUSED (sizeof(HEADER) - sizeof("WHAT"))
1.30 deraadt 246: (void)puts(HEADER);
1.1 deraadt 247:
248: if ((kp = kvm_getprocs(kd, KERN_PROC_ALL, 0, &nentries)) == NULL)
1.2 deraadt 249: errx(1, "%s", kvm_geterr(kd));
1.1 deraadt 250: for (i = 0; i < nentries; i++, kp++) {
251: struct proc *p = &kp->kp_proc;
252: struct eproc *e;
253:
254: if (p->p_stat == SIDL || p->p_stat == SZOMB)
255: continue;
256: e = &kp->kp_eproc;
257: for (ep = ehead; ep != NULL; ep = ep->next) {
1.7 downsj 258: /* ftp is a special case. */
259: if (strncmp(ep->utmp.ut_line, "ftp", 3) == 0) {
1.26 millert 260: char pidstr[UT_LINESIZE-2];
261: pid_t fp;
262:
263: (void)strncpy(pidstr, &ep->utmp.ut_line[3],
264: sizeof(pidstr) - 1);
265: pidstr[sizeof(pidstr) - 1] = '\0';
266: fp = (pid_t)strtol(pidstr, NULL, 10);
1.7 downsj 267: if (p->p_pid == fp) {
268: ep->kp = kp;
269: break;
270: }
1.33 smart 271: } else if (ep->tdev == e->e_tdev &&
272: e->e_pgid == e->e_tpgid) {
1.1 deraadt 273: /*
274: * Proc is in foreground of this terminal
275: */
276: if (proc_compare(&ep->kp->kp_proc, p))
277: ep->kp = kp;
278: break;
279: }
280: }
281: }
282: if ((ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) == -1 &&
283: ioctl(STDERR_FILENO, TIOCGWINSZ, &ws) == -1 &&
284: ioctl(STDIN_FILENO, TIOCGWINSZ, &ws) == -1) || ws.ws_col == 0)
285: ttywidth = 79;
286: else
287: ttywidth = ws.ws_col - 1;
288: argwidth = ttywidth - WUSED;
289: if (argwidth < 4)
290: argwidth = 8;
291: /* sort by idle time */
292: if (sortidle && ehead != NULL) {
293: struct entry *from = ehead, *save;
294:
295: ehead = NULL;
296: while (from != NULL) {
297: for (nextp = &ehead;
298: (*nextp) && from->idle >= (*nextp)->idle;
299: nextp = &(*nextp)->next)
300: continue;
301: save = from;
302: from = from->next;
303: save->next = *nextp;
304: *nextp = save;
305: }
306: }
307:
1.34 deraadt 308: if (!nflag) {
1.36 ! mpech 309: if (gethostname(domain, sizeof(domain)) < 0 ||
1.1 deraadt 310: (p = strchr(domain, '.')) == 0)
311: domain[0] = '\0';
312: else {
313: domain[sizeof(domain) - 1] = '\0';
314: memmove(domain, p, strlen(p) + 1);
315: }
1.34 deraadt 316: }
1.1 deraadt 317:
318: for (ep = ehead; ep != NULL; ep = ep->next) {
319: p = *ep->utmp.ut_host ? ep->utmp.ut_host : "-";
1.16 millert 320: for (x = NULL, i = 0; p[i] != '\0' && i < UT_HOSTSIZE; i++)
321: if (p[i] == ':') {
322: x = &p[i];
323: *x++ = '\0';
324: break;
325: }
1.27 deraadt 326: if (!nflag && inet_aton(p, &addr) &&
327: (hp = gethostbyaddr((char *)&addr, sizeof(addr), AF_INET))) {
1.1 deraadt 328: if (domain[0] != '\0') {
329: p = hp->h_name;
330: p += strlen(hp->h_name);
331: p -= strlen(domain);
1.31 deraadt 332: if (p > hp->h_name &&
333: strcasecmp(p, domain) == 0)
1.1 deraadt 334: *p = '\0';
335: }
336: p = hp->h_name;
337: }
338: if (x) {
339: (void)snprintf(buf, sizeof(buf), "%s:%.*s", p,
1.34 deraadt 340: (int)(ep->utmp.ut_host + UT_HOSTSIZE - x), x);
1.1 deraadt 341: p = buf;
342: }
1.22 deraadt 343: (void)printf("%-*.*s %-2.2s %-*.*s ",
1.32 deraadt 344: NAME_WIDTH, UT_NAMESIZE, ep->utmp.ut_name,
1.1 deraadt 345: strncmp(ep->utmp.ut_line, "tty", 3) ?
346: ep->utmp.ut_line : ep->utmp.ut_line + 3,
1.32 deraadt 347: HOST_WIDTH, HOST_WIDTH, *p ? p : "-");
1.1 deraadt 348: pr_attime(&ep->utmp.ut_time, &now);
349: pr_idle(ep->idle);
350: pr_args(ep->kp);
351: printf("\n");
352: }
353: exit(0);
354: }
355:
356: static void
357: pr_args(kp)
358: struct kinfo_proc *kp;
359: {
1.7 downsj 360: char **argv, *str;
1.1 deraadt 361: int left;
362:
1.23 millert 363: if (kp == NULL)
1.1 deraadt 364: goto nothing;
365: left = argwidth;
1.26 millert 366: argv = kvm_getargv(kd, kp, argwidth+60); /* +60 for ftpd snip */
1.23 millert 367: if (argv == NULL)
1.1 deraadt 368: goto nothing;
1.7 downsj 369:
1.23 millert 370: if (*argv == NULL || **argv == '\0') {
371: /* Process has zeroed argv[0], display executable name. */
372: fmt_putc('(', &left);
373: fmt_puts(kp->kp_proc.p_comm, &left);
374: fmt_putc(')', &left);
375: }
1.1 deraadt 376: while (*argv) {
1.7 downsj 377: /* ftp is a special case... */
378: if (strncmp(*argv, "ftpd:", 5) == 0) {
379: str = strrchr(*argv, ':');
380: if (str != (char *)NULL) {
1.8 downsj 381: if ((str[0] == ':') && isspace(str[1]))
1.7 downsj 382: str += 2;
383: fmt_puts(str, &left);
384: } else
385: fmt_puts(*argv, &left);
386: } else
387: fmt_puts(*argv, &left);
1.1 deraadt 388: argv++;
389: fmt_putc(' ', &left);
390: }
391: return;
392: nothing:
393: putchar('-');
394: }
395:
396: static void
397: pr_header(nowp, nusers)
398: time_t *nowp;
399: int nusers;
400: {
401: double avenrun[3];
402: time_t uptime;
403: int days, hrs, i, mins;
404: int mib[2];
405: size_t size;
406: char buf[256];
407:
408: /*
409: * Print time of day.
410: *
411: * SCCS forces the string manipulation below, as it replaces
412: * %, M, and % in a character string with the file name.
413: */
1.14 deraadt 414: (void)strftime(buf, sizeof(buf) - 1,
1.1 deraadt 415: __CONCAT("%l:%","M%p"), localtime(nowp));
1.33 smart 416: buf[sizeof(buf) - 1] = '\0';
1.1 deraadt 417: (void)printf("%s ", buf);
418:
419: /*
420: * Print how long system has been up.
421: * (Found by looking getting "boottime" from the kernel)
422: */
423: mib[0] = CTL_KERN;
424: mib[1] = KERN_BOOTTIME;
425: size = sizeof(boottime);
1.17 deraadt 426: if (sysctl(mib, 2, &boottime, &size, NULL, 0) != -1) {
1.1 deraadt 427: uptime = now - boottime.tv_sec;
1.19 mickey 428: if (uptime > 59) {
1.17 deraadt 429: uptime += 30;
430: days = uptime / SECSPERDAY;
431: uptime %= SECSPERDAY;
432: hrs = uptime / SECSPERHOUR;
433: uptime %= SECSPERHOUR;
434: mins = uptime / SECSPERMIN;
435: (void)printf(" up");
436: if (days > 0)
437: (void)printf(" %d day%s,", days,
438: days > 1 ? "s" : "");
439: if (hrs > 0 && mins > 0)
440: (void)printf(" %2d:%02d,", hrs, mins);
441: else {
442: if (hrs > 0)
443: (void)printf(" %d hr%s,",
444: hrs, hrs > 1 ? "s" : "");
445: if (mins > 0 || (days == 0 && hrs == 0))
446: (void)printf(" %d min%s,",
447: mins, mins != 1 ? "s" : "");
448: }
449: } else
1.18 deraadt 450: printf(" %d secs,", uptime);
1.1 deraadt 451: }
452:
453: /* Print number of users logged in to system */
454: (void)printf(" %d user%s", nusers, nusers != 1 ? "s" : "");
455:
456: /*
457: * Print 1, 5, and 15 minute load averages.
458: */
459: if (getloadavg(avenrun, sizeof(avenrun) / sizeof(avenrun[0])) == -1)
460: (void)printf(", no load average information available\n");
461: else {
462: (void)printf(", load averages:");
463: for (i = 0; i < (sizeof(avenrun) / sizeof(avenrun[0])); i++) {
464: if (i > 0)
465: (void)printf(",");
466: (void)printf(" %.2f", avenrun[i]);
467: }
468: (void)printf("\n");
469: }
470: }
471:
472: static struct stat *
473: ttystat(line)
474: char *line;
475: {
476: static struct stat sb;
1.26 millert 477: char ttybuf[sizeof(_PATH_DEV) + UT_LINESIZE];
1.1 deraadt 478:
1.26 millert 479: /* Note, line may not be NUL-terminated */
1.33 smart 480: (void)strlcpy(ttybuf, _PATH_DEV, sizeof(ttybuf));
481: (void)strncat(ttybuf, line, sizeof(ttybuf) - 1 - strlen(ttybuf));
1.1 deraadt 482: if (stat(ttybuf, &sb))
483: return (NULL);
484: return (&sb);
485: }
486:
487: static void
488: usage(wcmd)
489: int wcmd;
490: {
491: if (wcmd)
492: (void)fprintf(stderr,
1.33 smart 493: "usage: w [-hia] [-M core] [-N system] [user]\n");
1.1 deraadt 494: else
1.33 smart 495: (void)fprintf(stderr,
496: "usage: uptime [-M core] [-N system]\n");
1.1 deraadt 497: exit (1);
498: }
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