Annotation of src/usr.bin/w/w.c, Revision 1.53
1.53 ! deraadt 1: /* $OpenBSD: w.c,v 1.52 2013/08/22 04:43:41 guenther 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.
1.39 millert 15: * 3. Neither the name of the University nor the names of its contributors
1.1 deraadt 16: * may be used to endorse or promote products derived from this software
17: * without specific prior written permission.
18: *
19: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29: * SUCH DAMAGE.
30: */
31:
32: /*
33: * w - print system status (who and what)
34: *
35: * This program is similar to the systat command on Tenex/Tops 10/20
36: *
37: */
38: #include <sys/param.h>
39: #include <sys/time.h>
40: #include <sys/stat.h>
41: #include <sys/sysctl.h>
42: #include <sys/proc.h>
43: #include <sys/ioctl.h>
44: #include <sys/socket.h>
45: #include <sys/tty.h>
46:
47: #include <machine/cpu.h>
48: #include <netinet/in.h>
49: #include <arpa/inet.h>
50:
51: #include <ctype.h>
52: #include <err.h>
53: #include <errno.h>
54: #include <fcntl.h>
55: #include <kvm.h>
56: #include <netdb.h>
57: #include <nlist.h>
58: #include <paths.h>
59: #include <stdio.h>
60: #include <stdlib.h>
61: #include <string.h>
62: #include <tzfile.h>
63: #include <unistd.h>
1.5 deraadt 64: #include <limits.h>
1.1 deraadt 65: #include <utmp.h>
66: #include <vis.h>
67:
68: #include "extern.h"
69:
70: struct timeval boottime;
71: struct utmp utmp;
72: struct winsize ws;
73: kvm_t *kd;
74: time_t now; /* the current time of day */
75: int ttywidth; /* width of tty */
76: int argwidth; /* width of tty */
77: int header = 1; /* true if -h flag: don't print heading */
1.6 deraadt 78: int nflag = 1; /* true if -n flag: don't convert addrs */
1.49 jasper 79: int sortidle; /* sort by idle time */
1.1 deraadt 80: char *sel_user; /* login of particular user selected */
81: char domain[MAXHOSTNAMELEN];
82:
1.32 deraadt 83: #define NAME_WIDTH 8
84: #define HOST_WIDTH 16
85:
1.1 deraadt 86: /*
87: * One of these per active utmp entry.
88: */
89: struct entry {
90: struct entry *next;
91: struct utmp utmp;
1.41 millert 92: dev_t tdev; /* dev_t of terminal */
93: time_t idle; /* idle time of terminal in seconds */
1.48 guenther 94: struct kinfo_proc *kp; /* `most interesting' proc */
1.1 deraadt 95: } *ep, *ehead = NULL, **nextp = &ehead;
96:
1.48 guenther 97: static void pr_args(struct kinfo_proc *);
1.35 millert 98: static void pr_header(time_t *, int);
1.1 deraadt 99: static struct stat
1.35 millert 100: *ttystat(char *);
101: static void usage(int);
1.1 deraadt 102:
103: int
1.38 deraadt 104: main(int argc, char *argv[])
1.1 deraadt 105: {
106: extern char *__progname;
1.48 guenther 107: struct kinfo_proc *kp;
1.1 deraadt 108: struct hostent *hp;
109: struct stat *stp;
110: FILE *ut;
1.27 deraadt 111: struct in_addr addr;
1.1 deraadt 112: int ch, i, nentries, nusers, wcmd;
113: char *memf, *nlistf, *p, *x;
1.5 deraadt 114: char buf[MAXHOSTNAMELEN], errbuf[_POSIX2_LINE_MAX];
1.1 deraadt 115:
116: /* Are we w(1) or uptime(1)? */
117: p = __progname;
118: if (*p == '-')
119: p++;
1.19 mickey 120: if (p[0] == 'w' && p[1] == '\0') {
121: wcmd = 1;
122: p = "hiflM:N:asuw";
123: } else if (!strcmp(p, "uptime")) {
1.1 deraadt 124: wcmd = 0;
1.45 jaredy 125: p = "";
1.19 mickey 126: } else
1.20 kstailey 127: errx(1,
128: "this program should be invoked only as \"w\" or \"uptime\"");
1.1 deraadt 129:
130: memf = nlistf = NULL;
1.12 millert 131: while ((ch = getopt(argc, argv, p)) != -1)
1.1 deraadt 132: switch (ch) {
133: case 'h':
134: header = 0;
135: break;
136: case 'i':
137: sortidle = 1;
138: break;
139: case 'M':
140: header = 0;
141: memf = optarg;
142: break;
143: case 'N':
144: nlistf = optarg;
145: break;
1.6 deraadt 146: case 'a':
147: nflag = 0;
1.1 deraadt 148: break;
149: case 'f': case 'l': case 's': case 'u': case 'w':
150: warnx("[-flsuw] no longer supported");
151: /* FALLTHROUGH */
152: case '?':
153: default:
154: usage(wcmd);
155: }
156: argc -= optind;
157: argv += optind;
158:
1.37 angelos 159: if (nlistf == NULL && memf == NULL) {
1.38 deraadt 160: if ((kd = kvm_openfiles(nlistf, memf, NULL, KVM_NO_FILES,
161: errbuf)) == NULL)
1.37 angelos 162: errx(1, "%s", errbuf);
163: } else {
164: if ((kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf)) == NULL)
165: errx(1, "%s", errbuf);
1.11 tholo 166: }
1.1 deraadt 167:
168: (void)time(&now);
169: if ((ut = fopen(_PATH_UTMP, "r")) == NULL)
170: err(1, "%s", _PATH_UTMP);
171:
172: if (*argv)
173: sel_user = *argv;
174:
175: for (nusers = 0; fread(&utmp, sizeof(utmp), 1, ut);) {
176: if (utmp.ut_name[0] == '\0')
177: continue;
178: ++nusers;
179: if (wcmd == 0 || (sel_user &&
180: strncmp(utmp.ut_name, sel_user, UT_NAMESIZE) != 0))
181: continue;
1.33 smart 182: if ((ep = calloc(1, sizeof(*ep))) == NULL)
1.1 deraadt 183: err(1, NULL);
184: *nextp = ep;
185: nextp = &(ep->next);
1.33 smart 186: memcpy(&(ep->utmp), &utmp, sizeof(utmp));
1.1 deraadt 187: if (!(stp = ttystat(ep->utmp.ut_line)))
188: continue;
189: ep->tdev = stp->st_rdev;
1.50 kettenis 190:
1.1 deraadt 191: /*
192: * If this is the console device, attempt to ascertain
193: * the true console device dev_t.
194: */
195: if (ep->tdev == 0) {
196: int mib[2];
197: size_t size;
198:
1.50 kettenis 199: mib[0] = CTL_KERN;
200: mib[1] = KERN_CONSDEV;
1.1 deraadt 201: size = sizeof(dev_t);
202: (void) sysctl(mib, 2, &ep->tdev, &size, NULL, 0);
203: }
1.50 kettenis 204:
1.1 deraadt 205: if ((ep->idle = now - stp->st_atime) < 0)
206: ep->idle = 0;
207: }
208: (void)fclose(ut);
209:
210: if (header || wcmd == 0) {
211: pr_header(&now, nusers);
212: if (wcmd == 0)
213: exit (0);
214: }
215:
1.30 deraadt 216: #define HEADER "USER TTY FROM LOGIN@ IDLE WHAT"
1.33 smart 217: #define WUSED (sizeof(HEADER) - sizeof("WHAT"))
1.30 deraadt 218: (void)puts(HEADER);
1.1 deraadt 219:
1.48 guenther 220: kp = kvm_getprocs(kd, KERN_PROC_ALL, 0, sizeof(*kp), &nentries);
1.41 millert 221: if (kp == NULL)
1.2 deraadt 222: errx(1, "%s", kvm_geterr(kd));
1.1 deraadt 223: for (i = 0; i < nentries; i++, kp++) {
1.41 millert 224: if (kp->p_stat == SIDL || kp->p_stat == SZOMB)
1.1 deraadt 225: continue;
226: for (ep = ehead; ep != NULL; ep = ep->next) {
1.7 downsj 227: /* ftp is a special case. */
228: if (strncmp(ep->utmp.ut_line, "ftp", 3) == 0) {
1.26 millert 229: char pidstr[UT_LINESIZE-2];
230: pid_t fp;
231:
232: (void)strncpy(pidstr, &ep->utmp.ut_line[3],
233: sizeof(pidstr) - 1);
234: pidstr[sizeof(pidstr) - 1] = '\0';
235: fp = (pid_t)strtol(pidstr, NULL, 10);
1.41 millert 236: if (kp->p_pid == fp) {
1.7 downsj 237: ep->kp = kp;
238: break;
239: }
1.41 millert 240: } else if (ep->tdev == kp->p_tdev &&
241: kp->p__pgid == kp->p_tpgid) {
1.1 deraadt 242: /*
243: * Proc is in foreground of this terminal
244: */
1.41 millert 245: if (proc_compare(ep->kp, kp))
1.1 deraadt 246: ep->kp = kp;
247: break;
248: }
249: }
250: }
251: if ((ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) == -1 &&
1.44 deraadt 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;
1.1 deraadt 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;
1.44 deraadt 263:
1.1 deraadt 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: }
1.44 deraadt 276:
1.34 deraadt 277: if (!nflag) {
1.36 mpech 278: if (gethostname(domain, sizeof(domain)) < 0 ||
1.1 deraadt 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: }
1.34 deraadt 285: }
1.1 deraadt 286:
287: for (ep = ehead; ep != NULL; ep = ep->next) {
288: p = *ep->utmp.ut_host ? ep->utmp.ut_host : "-";
1.16 millert 289: for (x = NULL, i = 0; p[i] != '\0' && i < UT_HOSTSIZE; i++)
290: if (p[i] == ':') {
291: x = &p[i];
292: *x++ = '\0';
293: break;
294: }
1.27 deraadt 295: if (!nflag && inet_aton(p, &addr) &&
296: (hp = gethostbyaddr((char *)&addr, sizeof(addr), AF_INET))) {
1.1 deraadt 297: if (domain[0] != '\0') {
298: p = hp->h_name;
299: p += strlen(hp->h_name);
300: p -= strlen(domain);
1.31 deraadt 301: if (p > hp->h_name &&
302: strcasecmp(p, domain) == 0)
1.1 deraadt 303: *p = '\0';
304: }
305: p = hp->h_name;
306: }
307: if (x) {
308: (void)snprintf(buf, sizeof(buf), "%s:%.*s", p,
1.34 deraadt 309: (int)(ep->utmp.ut_host + UT_HOSTSIZE - x), x);
1.1 deraadt 310: p = buf;
311: }
1.22 deraadt 312: (void)printf("%-*.*s %-2.2s %-*.*s ",
1.32 deraadt 313: NAME_WIDTH, UT_NAMESIZE, ep->utmp.ut_name,
1.1 deraadt 314: strncmp(ep->utmp.ut_line, "tty", 3) ?
315: ep->utmp.ut_line : ep->utmp.ut_line + 3,
1.32 deraadt 316: HOST_WIDTH, HOST_WIDTH, *p ? p : "-");
1.1 deraadt 317: pr_attime(&ep->utmp.ut_time, &now);
318: pr_idle(ep->idle);
319: pr_args(ep->kp);
320: printf("\n");
321: }
322: exit(0);
323: }
324:
325: static void
1.48 guenther 326: pr_args(struct kinfo_proc *kp)
1.1 deraadt 327: {
1.7 downsj 328: char **argv, *str;
1.1 deraadt 329: int left;
330:
1.23 millert 331: if (kp == NULL)
1.41 millert 332: goto nothing; /* XXX - can this happen? */
1.1 deraadt 333: left = argwidth;
1.48 guenther 334: argv = kvm_getargv(kd, kp, argwidth+60); /* +60 for ftpd snip */
1.23 millert 335: if (argv == NULL)
1.1 deraadt 336: goto nothing;
1.7 downsj 337:
1.23 millert 338: if (*argv == NULL || **argv == '\0') {
339: /* Process has zeroed argv[0], display executable name. */
340: fmt_putc('(', &left);
1.41 millert 341: fmt_puts(kp->p_comm, &left);
1.23 millert 342: fmt_putc(')', &left);
343: }
1.1 deraadt 344: while (*argv) {
1.46 millert 345: /*
346: * ftp argv[0] is in the following format:
347: * ftpd: HOSTNAME: [USER/PASS: ]CMD args (ftpd)
348: */
1.7 downsj 349: if (strncmp(*argv, "ftpd:", 5) == 0) {
1.46 millert 350: if ((str = strchr(*argv + 5, ':')) != NULL)
351: str = strchr(str + 1, ':');
352: if (str != NULL) {
1.8 downsj 353: if ((str[0] == ':') && isspace(str[1]))
1.7 downsj 354: str += 2;
355: fmt_puts(str, &left);
356: } else
357: fmt_puts(*argv, &left);
358: } else
359: fmt_puts(*argv, &left);
1.1 deraadt 360: argv++;
361: fmt_putc(' ', &left);
362: }
363: return;
364: nothing:
365: putchar('-');
366: }
367:
368: static void
1.38 deraadt 369: pr_header(time_t *nowp, int nusers)
1.1 deraadt 370: {
371: double avenrun[3];
372: time_t uptime;
373: int days, hrs, i, mins;
374: int mib[2];
375: size_t size;
376: char buf[256];
377:
378: /*
379: * Print time of day.
380: */
1.40 millert 381: (void)strftime(buf, sizeof(buf) - 1, "%l:%M%p", localtime(nowp));
1.33 smart 382: buf[sizeof(buf) - 1] = '\0';
1.1 deraadt 383: (void)printf("%s ", buf);
384:
385: /*
386: * Print how long system has been up.
1.51 guenther 387: * (Found by getting "boottime" from the kernel)
1.1 deraadt 388: */
389: mib[0] = CTL_KERN;
390: mib[1] = KERN_BOOTTIME;
391: size = sizeof(boottime);
1.17 deraadt 392: if (sysctl(mib, 2, &boottime, &size, NULL, 0) != -1) {
1.1 deraadt 393: uptime = now - boottime.tv_sec;
1.19 mickey 394: if (uptime > 59) {
1.17 deraadt 395: uptime += 30;
396: days = uptime / SECSPERDAY;
397: uptime %= SECSPERDAY;
398: hrs = uptime / SECSPERHOUR;
399: uptime %= SECSPERHOUR;
400: mins = uptime / SECSPERMIN;
401: (void)printf(" up");
402: if (days > 0)
403: (void)printf(" %d day%s,", days,
404: days > 1 ? "s" : "");
405: if (hrs > 0 && mins > 0)
406: (void)printf(" %2d:%02d,", hrs, mins);
407: else {
408: if (hrs > 0)
409: (void)printf(" %d hr%s,",
410: hrs, hrs > 1 ? "s" : "");
411: if (mins > 0 || (days == 0 && hrs == 0))
412: (void)printf(" %d min%s,",
413: mins, mins != 1 ? "s" : "");
414: }
415: } else
1.52 guenther 416: printf(" %d secs,", (int)uptime);
1.1 deraadt 417: }
418:
419: /* Print number of users logged in to system */
420: (void)printf(" %d user%s", nusers, nusers != 1 ? "s" : "");
421:
422: /*
423: * Print 1, 5, and 15 minute load averages.
424: */
425: if (getloadavg(avenrun, sizeof(avenrun) / sizeof(avenrun[0])) == -1)
426: (void)printf(", no load average information available\n");
427: else {
428: (void)printf(", load averages:");
429: for (i = 0; i < (sizeof(avenrun) / sizeof(avenrun[0])); i++) {
430: if (i > 0)
431: (void)printf(",");
432: (void)printf(" %.2f", avenrun[i]);
433: }
434: (void)printf("\n");
435: }
436: }
437:
438: static struct stat *
1.38 deraadt 439: ttystat(char *line)
1.1 deraadt 440: {
441: static struct stat sb;
1.26 millert 442: char ttybuf[sizeof(_PATH_DEV) + UT_LINESIZE];
1.1 deraadt 443:
1.26 millert 444: /* Note, line may not be NUL-terminated */
1.33 smart 445: (void)strlcpy(ttybuf, _PATH_DEV, sizeof(ttybuf));
446: (void)strncat(ttybuf, line, sizeof(ttybuf) - 1 - strlen(ttybuf));
1.1 deraadt 447: if (stat(ttybuf, &sb))
448: return (NULL);
449: return (&sb);
450: }
451:
452: static void
1.38 deraadt 453: usage(int wcmd)
1.1 deraadt 454: {
455: if (wcmd)
456: (void)fprintf(stderr,
1.42 jmc 457: "usage: w [-ahi] [-M core] [-N system] [user]\n");
1.1 deraadt 458: else
1.33 smart 459: (void)fprintf(stderr,
1.45 jaredy 460: "usage: uptime\n");
1.1 deraadt 461: exit (1);
462: }
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