Annotation of src/usr.bin/w/w.c, Revision 1.48
1.48 ! guenther 1: /* $OpenBSD: w.c,v 1.47 2009/10/27 23:59:49 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.
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/user.h>
44: #include <sys/ioctl.h>
45: #include <sys/socket.h>
46: #include <sys/tty.h>
47:
48: #include <machine/cpu.h>
49: #include <netinet/in.h>
50: #include <arpa/inet.h>
51:
52: #include <ctype.h>
53: #include <err.h>
54: #include <errno.h>
55: #include <fcntl.h>
56: #include <kvm.h>
57: #include <netdb.h>
58: #include <nlist.h>
59: #include <paths.h>
60: #include <stdio.h>
61: #include <stdlib.h>
62: #include <string.h>
63: #include <tzfile.h>
64: #include <unistd.h>
1.5 deraadt 65: #include <limits.h>
1.1 deraadt 66: #include <utmp.h>
67: #include <vis.h>
68:
69: #include "extern.h"
70:
71: struct timeval boottime;
72: struct utmp utmp;
73: struct winsize ws;
74: kvm_t *kd;
75: time_t now; /* the current time of day */
76: int ttywidth; /* width of tty */
77: int argwidth; /* width of tty */
78: int header = 1; /* true if -h flag: don't print heading */
1.6 deraadt 79: int nflag = 1; /* true if -n flag: don't convert addrs */
1.1 deraadt 80: int sortidle; /* sort bu idle time */
81: char *sel_user; /* login of particular user selected */
82: char domain[MAXHOSTNAMELEN];
83:
1.32 deraadt 84: #define NAME_WIDTH 8
85: #define HOST_WIDTH 16
86:
1.1 deraadt 87: /*
88: * One of these per active utmp entry.
89: */
90: struct entry {
91: struct entry *next;
92: struct utmp utmp;
1.41 millert 93: dev_t tdev; /* dev_t of terminal */
94: time_t idle; /* idle time of terminal in seconds */
1.48 ! guenther 95: struct kinfo_proc *kp; /* `most interesting' proc */
1.1 deraadt 96: } *ep, *ehead = NULL, **nextp = &ehead;
97:
1.48 ! guenther 98: static void pr_args(struct kinfo_proc *);
1.35 millert 99: static void pr_header(time_t *, int);
1.1 deraadt 100: static struct stat
1.35 millert 101: *ttystat(char *);
102: static void usage(int);
1.1 deraadt 103:
104: int
1.38 deraadt 105: main(int argc, char *argv[])
1.1 deraadt 106: {
107: extern char *__progname;
1.48 ! guenther 108: struct kinfo_proc *kp;
1.1 deraadt 109: struct hostent *hp;
110: struct stat *stp;
111: FILE *ut;
1.27 deraadt 112: struct in_addr addr;
1.1 deraadt 113: int ch, i, nentries, nusers, wcmd;
114: char *memf, *nlistf, *p, *x;
1.5 deraadt 115: char buf[MAXHOSTNAMELEN], errbuf[_POSIX2_LINE_MAX];
1.1 deraadt 116:
117: /* Are we w(1) or uptime(1)? */
118: p = __progname;
119: if (*p == '-')
120: p++;
1.19 mickey 121: if (p[0] == 'w' && p[1] == '\0') {
122: wcmd = 1;
123: p = "hiflM:N:asuw";
124: } else if (!strcmp(p, "uptime")) {
1.1 deraadt 125: wcmd = 0;
1.45 jaredy 126: p = "";
1.19 mickey 127: } else
1.20 kstailey 128: errx(1,
129: "this program should be invoked only as \"w\" or \"uptime\"");
1.1 deraadt 130:
131: memf = nlistf = NULL;
1.12 millert 132: while ((ch = getopt(argc, argv, p)) != -1)
1.1 deraadt 133: switch (ch) {
134: case 'h':
135: header = 0;
136: break;
137: case 'i':
138: sortidle = 1;
139: break;
140: case 'M':
141: header = 0;
142: memf = optarg;
143: break;
144: case 'N':
145: nlistf = optarg;
146: break;
1.6 deraadt 147: case 'a':
148: nflag = 0;
1.1 deraadt 149: break;
150: case 'f': case 'l': case 's': case 'u': case 'w':
151: warnx("[-flsuw] no longer supported");
152: /* FALLTHROUGH */
153: case '?':
154: default:
155: usage(wcmd);
156: }
157: argc -= optind;
158: argv += optind;
159:
1.37 angelos 160: if (nlistf == NULL && memf == NULL) {
1.38 deraadt 161: if ((kd = kvm_openfiles(nlistf, memf, NULL, KVM_NO_FILES,
162: errbuf)) == NULL)
1.37 angelos 163: errx(1, "%s", errbuf);
164: } else {
165: if ((kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf)) == NULL)
166: errx(1, "%s", errbuf);
1.11 tholo 167: }
1.1 deraadt 168:
169: (void)time(&now);
170: if ((ut = fopen(_PATH_UTMP, "r")) == NULL)
171: err(1, "%s", _PATH_UTMP);
172:
173: if (*argv)
174: sel_user = *argv;
175:
176: for (nusers = 0; fread(&utmp, sizeof(utmp), 1, ut);) {
177: if (utmp.ut_name[0] == '\0')
178: continue;
179: ++nusers;
180: if (wcmd == 0 || (sel_user &&
181: strncmp(utmp.ut_name, sel_user, UT_NAMESIZE) != 0))
182: continue;
1.33 smart 183: if ((ep = calloc(1, sizeof(*ep))) == NULL)
1.1 deraadt 184: err(1, NULL);
185: *nextp = ep;
186: nextp = &(ep->next);
1.33 smart 187: memcpy(&(ep->utmp), &utmp, sizeof(utmp));
1.1 deraadt 188: if (!(stp = ttystat(ep->utmp.ut_line)))
189: continue;
190: ep->tdev = stp->st_rdev;
191: #ifdef CPU_CONSDEV
192: /*
193: * If this is the console device, attempt to ascertain
194: * the true console device dev_t.
195: */
196: if (ep->tdev == 0) {
197: int mib[2];
198: size_t size;
199:
200: mib[0] = CTL_MACHDEP;
201: mib[1] = CPU_CONSDEV;
202: size = sizeof(dev_t);
203: (void) sysctl(mib, 2, &ep->tdev, &size, NULL, 0);
204: }
205: #endif
206: if ((ep->idle = now - stp->st_atime) < 0)
207: ep->idle = 0;
208: }
209: (void)fclose(ut);
210:
211: if (header || wcmd == 0) {
212: pr_header(&now, nusers);
213: if (wcmd == 0)
214: exit (0);
215: }
216:
1.30 deraadt 217: #define HEADER "USER TTY FROM LOGIN@ IDLE WHAT"
1.33 smart 218: #define WUSED (sizeof(HEADER) - sizeof("WHAT"))
1.30 deraadt 219: (void)puts(HEADER);
1.1 deraadt 220:
1.48 ! guenther 221: kp = kvm_getprocs(kd, KERN_PROC_ALL, 0, sizeof(*kp), &nentries);
1.41 millert 222: if (kp == NULL)
1.2 deraadt 223: errx(1, "%s", kvm_geterr(kd));
1.1 deraadt 224: for (i = 0; i < nentries; i++, kp++) {
1.41 millert 225: if (kp->p_stat == SIDL || kp->p_stat == SZOMB)
1.1 deraadt 226: continue;
227: for (ep = ehead; ep != NULL; ep = ep->next) {
1.7 downsj 228: /* ftp is a special case. */
229: if (strncmp(ep->utmp.ut_line, "ftp", 3) == 0) {
1.26 millert 230: char pidstr[UT_LINESIZE-2];
231: pid_t fp;
232:
233: (void)strncpy(pidstr, &ep->utmp.ut_line[3],
234: sizeof(pidstr) - 1);
235: pidstr[sizeof(pidstr) - 1] = '\0';
236: fp = (pid_t)strtol(pidstr, NULL, 10);
1.41 millert 237: if (kp->p_pid == fp) {
1.7 downsj 238: ep->kp = kp;
239: break;
240: }
1.41 millert 241: } else if (ep->tdev == kp->p_tdev &&
242: kp->p__pgid == kp->p_tpgid) {
1.1 deraadt 243: /*
244: * Proc is in foreground of this terminal
245: */
1.41 millert 246: if (proc_compare(ep->kp, kp))
1.1 deraadt 247: ep->kp = kp;
248: break;
249: }
250: }
251: }
252: if ((ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) == -1 &&
1.44 deraadt 253: ioctl(STDERR_FILENO, TIOCGWINSZ, &ws) == -1 &&
254: ioctl(STDIN_FILENO, TIOCGWINSZ, &ws) == -1) || ws.ws_col == 0)
255: ttywidth = 79;
256: else
257: ttywidth = ws.ws_col - 1;
1.1 deraadt 258: argwidth = ttywidth - WUSED;
259: if (argwidth < 4)
260: argwidth = 8;
261: /* sort by idle time */
262: if (sortidle && ehead != NULL) {
263: struct entry *from = ehead, *save;
1.44 deraadt 264:
1.1 deraadt 265: ehead = NULL;
266: while (from != NULL) {
267: for (nextp = &ehead;
268: (*nextp) && from->idle >= (*nextp)->idle;
269: nextp = &(*nextp)->next)
270: continue;
271: save = from;
272: from = from->next;
273: save->next = *nextp;
274: *nextp = save;
275: }
276: }
1.44 deraadt 277:
1.34 deraadt 278: if (!nflag) {
1.36 mpech 279: if (gethostname(domain, sizeof(domain)) < 0 ||
1.1 deraadt 280: (p = strchr(domain, '.')) == 0)
281: domain[0] = '\0';
282: else {
283: domain[sizeof(domain) - 1] = '\0';
284: memmove(domain, p, strlen(p) + 1);
285: }
1.34 deraadt 286: }
1.1 deraadt 287:
288: for (ep = ehead; ep != NULL; ep = ep->next) {
289: p = *ep->utmp.ut_host ? ep->utmp.ut_host : "-";
1.16 millert 290: for (x = NULL, i = 0; p[i] != '\0' && i < UT_HOSTSIZE; i++)
291: if (p[i] == ':') {
292: x = &p[i];
293: *x++ = '\0';
294: break;
295: }
1.27 deraadt 296: if (!nflag && inet_aton(p, &addr) &&
297: (hp = gethostbyaddr((char *)&addr, sizeof(addr), AF_INET))) {
1.1 deraadt 298: if (domain[0] != '\0') {
299: p = hp->h_name;
300: p += strlen(hp->h_name);
301: p -= strlen(domain);
1.31 deraadt 302: if (p > hp->h_name &&
303: strcasecmp(p, domain) == 0)
1.1 deraadt 304: *p = '\0';
305: }
306: p = hp->h_name;
307: }
308: if (x) {
309: (void)snprintf(buf, sizeof(buf), "%s:%.*s", p,
1.34 deraadt 310: (int)(ep->utmp.ut_host + UT_HOSTSIZE - x), x);
1.1 deraadt 311: p = buf;
312: }
1.22 deraadt 313: (void)printf("%-*.*s %-2.2s %-*.*s ",
1.32 deraadt 314: NAME_WIDTH, UT_NAMESIZE, ep->utmp.ut_name,
1.1 deraadt 315: strncmp(ep->utmp.ut_line, "tty", 3) ?
316: ep->utmp.ut_line : ep->utmp.ut_line + 3,
1.32 deraadt 317: HOST_WIDTH, HOST_WIDTH, *p ? p : "-");
1.1 deraadt 318: pr_attime(&ep->utmp.ut_time, &now);
319: pr_idle(ep->idle);
320: pr_args(ep->kp);
321: printf("\n");
322: }
323: exit(0);
324: }
325:
326: static void
1.48 ! guenther 327: pr_args(struct kinfo_proc *kp)
1.1 deraadt 328: {
1.7 downsj 329: char **argv, *str;
1.1 deraadt 330: int left;
331:
1.23 millert 332: if (kp == NULL)
1.41 millert 333: goto nothing; /* XXX - can this happen? */
1.1 deraadt 334: left = argwidth;
1.48 ! guenther 335: argv = kvm_getargv(kd, kp, argwidth+60); /* +60 for ftpd snip */
1.23 millert 336: if (argv == NULL)
1.1 deraadt 337: goto nothing;
1.7 downsj 338:
1.23 millert 339: if (*argv == NULL || **argv == '\0') {
340: /* Process has zeroed argv[0], display executable name. */
341: fmt_putc('(', &left);
1.41 millert 342: fmt_puts(kp->p_comm, &left);
1.23 millert 343: fmt_putc(')', &left);
344: }
1.1 deraadt 345: while (*argv) {
1.46 millert 346: /*
347: * ftp argv[0] is in the following format:
348: * ftpd: HOSTNAME: [USER/PASS: ]CMD args (ftpd)
349: */
1.7 downsj 350: if (strncmp(*argv, "ftpd:", 5) == 0) {
1.46 millert 351: if ((str = strchr(*argv + 5, ':')) != NULL)
352: str = strchr(str + 1, ':');
353: if (str != NULL) {
1.8 downsj 354: if ((str[0] == ':') && isspace(str[1]))
1.7 downsj 355: str += 2;
356: fmt_puts(str, &left);
357: } else
358: fmt_puts(*argv, &left);
359: } else
360: fmt_puts(*argv, &left);
1.1 deraadt 361: argv++;
362: fmt_putc(' ', &left);
363: }
364: return;
365: nothing:
366: putchar('-');
367: }
368:
369: static void
1.38 deraadt 370: pr_header(time_t *nowp, int nusers)
1.1 deraadt 371: {
372: double avenrun[3];
373: time_t uptime;
374: int days, hrs, i, mins;
375: int mib[2];
376: size_t size;
377: char buf[256];
378:
379: /*
380: * Print time of day.
381: */
1.40 millert 382: (void)strftime(buf, sizeof(buf) - 1, "%l:%M%p", localtime(nowp));
1.33 smart 383: buf[sizeof(buf) - 1] = '\0';
1.1 deraadt 384: (void)printf("%s ", buf);
385:
386: /*
387: * Print how long system has been up.
388: * (Found by looking getting "boottime" from the kernel)
389: */
390: mib[0] = CTL_KERN;
391: mib[1] = KERN_BOOTTIME;
392: size = sizeof(boottime);
1.17 deraadt 393: if (sysctl(mib, 2, &boottime, &size, NULL, 0) != -1) {
1.1 deraadt 394: uptime = now - boottime.tv_sec;
1.19 mickey 395: if (uptime > 59) {
1.17 deraadt 396: uptime += 30;
397: days = uptime / SECSPERDAY;
398: uptime %= SECSPERDAY;
399: hrs = uptime / SECSPERHOUR;
400: uptime %= SECSPERHOUR;
401: mins = uptime / SECSPERMIN;
402: (void)printf(" up");
403: if (days > 0)
404: (void)printf(" %d day%s,", days,
405: days > 1 ? "s" : "");
406: if (hrs > 0 && mins > 0)
407: (void)printf(" %2d:%02d,", hrs, mins);
408: else {
409: if (hrs > 0)
410: (void)printf(" %d hr%s,",
411: hrs, hrs > 1 ? "s" : "");
412: if (mins > 0 || (days == 0 && hrs == 0))
413: (void)printf(" %d min%s,",
414: mins, mins != 1 ? "s" : "");
415: }
416: } else
1.18 deraadt 417: printf(" %d secs,", uptime);
1.1 deraadt 418: }
419:
420: /* Print number of users logged in to system */
421: (void)printf(" %d user%s", nusers, nusers != 1 ? "s" : "");
422:
423: /*
424: * Print 1, 5, and 15 minute load averages.
425: */
426: if (getloadavg(avenrun, sizeof(avenrun) / sizeof(avenrun[0])) == -1)
427: (void)printf(", no load average information available\n");
428: else {
429: (void)printf(", load averages:");
430: for (i = 0; i < (sizeof(avenrun) / sizeof(avenrun[0])); i++) {
431: if (i > 0)
432: (void)printf(",");
433: (void)printf(" %.2f", avenrun[i]);
434: }
435: (void)printf("\n");
436: }
437: }
438:
439: static struct stat *
1.38 deraadt 440: ttystat(char *line)
1.1 deraadt 441: {
442: static struct stat sb;
1.26 millert 443: char ttybuf[sizeof(_PATH_DEV) + UT_LINESIZE];
1.1 deraadt 444:
1.26 millert 445: /* Note, line may not be NUL-terminated */
1.33 smart 446: (void)strlcpy(ttybuf, _PATH_DEV, sizeof(ttybuf));
447: (void)strncat(ttybuf, line, sizeof(ttybuf) - 1 - strlen(ttybuf));
1.1 deraadt 448: if (stat(ttybuf, &sb))
449: return (NULL);
450: return (&sb);
451: }
452:
453: static void
1.38 deraadt 454: usage(int wcmd)
1.1 deraadt 455: {
456: if (wcmd)
457: (void)fprintf(stderr,
1.42 jmc 458: "usage: w [-ahi] [-M core] [-N system] [user]\n");
1.1 deraadt 459: else
1.33 smart 460: (void)fprintf(stderr,
1.45 jaredy 461: "usage: uptime\n");
1.1 deraadt 462: exit (1);
463: }
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