[dragonfly.git] / usr.bin / w / w.c

/*-
 * Copyright (c) 1980, 1991, 1993, 1994
 *	The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * @(#) Copyright (c) 1980, 1991, 1993, 1994 The Regents of the University of California.  All rights reserved.
 * @(#)w.c	8.4 (Berkeley) 4/16/94
 * $FreeBSD: src/usr.bin/w/w.c,v 1.38.2.6 2002/03/12 19:51:51 phantom Exp $
 * $DragonFly: src/usr.bin/w/w.c,v 1.10 2007/02/18 16:15:24 corecode Exp $
 */

/*
 * w - print system status (who and what)
 *
 * This program is similar to the systat command on Tenex/Tops 10/20
 *
 */
#include <sys/param.h>
#include <sys/time.h>
#include <sys/stat.h>
#include <sys/sysctl.h>
#include <sys/user.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <sys/tty.h>

#include <machine/cpu.h>
#include <netinet/in.h>
#include <arpa/inet.h>

#include <ctype.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <kvm.h>
#include <limits.h>
#include <langinfo.h>
#include <locale.h>
#include <netdb.h>
#include <nlist.h>
#include <paths.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <utmp.h>
#include <vis.h>

#include <arpa/nameser.h>
#include <resolv.h>

#include "extern.h"

struct timeval	boottime;
struct utmp	utmp;
struct winsize	ws;
kvm_t	       *kd;
time_t		now;		/* the current time of day */
time_t		uptime;		/* time of last reboot & elapsed time since */
int		ttywidth;	/* width of tty */
int		argwidth;	/* width of tty */
int		header = 1;	/* true if -h flag: don't print heading */
int		nflag;		/* true if -n flag: don't convert addrs */
int		dflag;		/* true if -d flag: output debug info */
int		sortidle;	/* sort by idle time */
int		use_ampm;	/* use AM/PM time */
int             use_comma;      /* use comma as floats separator */
char	      **sel_users;	/* login array of particular users selected */
char		domain[MAXHOSTNAMELEN];

/*
 * One of these per active utmp entry.
 */
struct	entry {
	struct	entry *next;
	struct	utmp utmp;
	dev_t	tdev;			/* dev_t of terminal */
	time_t	idle;			/* idle time of terminal in seconds */
	struct	kinfo_proc *kp;		/* `most interesting' proc */
	char	*args;			/* arg list of interesting process */
	struct	kinfo_proc *dkp;	/* debug option proc list */
} *ep, *ehead = NULL, **nextp = &ehead;

#define debugproc(p) *((struct kinfo_proc **)&(p)->kp_spare[0])

static void		 pr_header(time_t *, int);
static struct stat	*ttystat(char *, int);
static void		 usage(int);
static int		 this_is_uptime(const char *s);

char *fmt_argv(char **, char *, int);	/* ../../bin/ps/fmt.c */

int
main(int argc, char **argv)
{
	struct kinfo_proc *kp;
	struct kinfo_proc *dkp;
	struct hostent *hp;
	struct stat *stp;
	FILE *ut;
	in_addr_t l;
	time_t touched;
	int ch, i, nentries, nusers, wcmd, longidle, dropgid;
	char *memf, *nlistf, *p, *x;
	char buf[MAXHOSTNAMELEN], errbuf[_POSIX2_LINE_MAX];

	(void)setlocale(LC_ALL, "");
	use_ampm = (*nl_langinfo(T_FMT_AMPM) != '\0');
	use_comma = (*nl_langinfo(RADIXCHAR) != ',');

	/* Are we w(1) or uptime(1)? */
	if (this_is_uptime(argv[0]) == 0) {
		wcmd = 0;
		p = "";
	} else {
		wcmd = 1;
		p = "dhiflM:N:nsuw";
	}

	dropgid = 0;
	memf = nlistf = _PATH_DEVNULL;
	while ((ch = getopt(argc, argv, p)) != -1)
		switch (ch) {
		case 'd':
			dflag = 1;
			break;
		case 'h':
			header = 0;
			break;
		case 'i':
			sortidle = 1;
			break;
		case 'M':
			header = 0;
			memf = optarg;
			dropgid = 1;
			break;
		case 'N':
			nlistf = optarg;
			dropgid = 1;
			break;
		case 'n':
			nflag = 1;
			break;
		case 'f': case 'l': case 's': case 'u': case 'w':
			warnx("[-flsuw] no longer supported");
			/* FALLTHROUGH */
		case '?':
		default:
			usage(wcmd);
		}
	argc -= optind;
	argv += optind;

	if (!(_res.options & RES_INIT))
		res_init();
	_res.retrans = 2;	/* resolver timeout to 2 seconds per try */
	_res.retry = 1;		/* only try once.. */

	/*
	 * Discard setgid privileges if not the running kernel so that bad
	 * guys can't print interesting stuff from kernel memory.
	 */
	if (dropgid)
		setgid(getgid());

	if ((kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf)) == NULL)
		errx(1, "%s", errbuf);

	(void)time(&now);
	if ((ut = fopen(_PATH_UTMP, "r")) == NULL)
		err(1, "%s", _PATH_UTMP);

	if (*argv)
		sel_users = argv;

	for (nusers = 0; fread(&utmp, sizeof(utmp), 1, ut);) {
		if (utmp.ut_name[0] == '\0')
			continue;
		if (!(stp = ttystat(utmp.ut_line, UT_LINESIZE)))
			continue;	/* corrupted record */
		++nusers;
		if (wcmd == 0)
			continue;
		if (sel_users) {
			int usermatch;
			char **user;

			usermatch = 0;
			for (user = sel_users; !usermatch && *user; user++)
				if (!strncmp(utmp.ut_name, *user, UT_NAMESIZE))
					usermatch = 1;
			if (!usermatch)
				continue;
		}
		if ((ep = calloc(1, sizeof(struct entry))) == NULL)
			errx(1, "calloc");
		*nextp = ep;
		nextp = &ep->next;
		memmove(&ep->utmp, &utmp, sizeof(struct utmp));
		ep->tdev = stp->st_rdev;
#ifdef CPU_CONSDEV
		/*
		 * If this is the console device, attempt to ascertain
		 * the true console device dev_t.
		 */
		if (ep->tdev == 0) {
			int mib[2];
			size_t size;

			mib[0] = CTL_MACHDEP;
			mib[1] = CPU_CONSDEV;
			size = sizeof(dev_t);
			(void)sysctl(mib, 2, &ep->tdev, &size, NULL, 0);
		}
#endif
		touched = stp->st_atime;
		if (touched < ep->utmp.ut_time) {
			/* tty untouched since before login */
			touched = ep->utmp.ut_time;
		}
		if ((ep->idle = now - touched) < 0)
			ep->idle = 0;
	}
	(void)fclose(ut);

	if (header || wcmd == 0) {
		pr_header(&now, nusers);
		if (wcmd == 0) {
			(void)kvm_close(kd);
			exit(0);
		}

#define HEADER_USER		"USER"
#define HEADER_TTY		"TTY"
#define HEADER_FROM		"FROM"
#define HEADER_LOGIN_IDLE	"LOGIN@  IDLE "
#define HEADER_WHAT		"WHAT\n"
#define WUSED  (UT_NAMESIZE + UT_LINESIZE + UT_HOSTSIZE + \
		sizeof(HEADER_LOGIN_IDLE) + 3)	/* header width incl. spaces */ 
		(void)printf("%-*.*s %-*.*s %-*.*s  %s", 
				UT_NAMESIZE, UT_NAMESIZE, HEADER_USER,
				UT_LINESIZE, UT_LINESIZE, HEADER_TTY,
				UT_HOSTSIZE, UT_HOSTSIZE, HEADER_FROM,
				HEADER_LOGIN_IDLE HEADER_WHAT);
	}

	if ((kp = kvm_getprocs(kd, KERN_PROC_ALL, 0, &nentries)) == NULL)
		err(1, "%s", kvm_geterr(kd));
	for (i = 0; i < nentries; i++, kp++) {
		if (kp->kp_stat == SIDL || kp->kp_stat == SZOMB)
			continue;
		for (ep = ehead; ep != NULL; ep = ep->next) {
			if (ep->tdev == kp->kp_tdev) {
				/*
				 * proc is associated with this terminal
				 */
				if (ep->kp == NULL && kp->kp_pgid == kp->kp_tpgid) {
					/*
					 * Proc is 'most interesting'
					 */
					if (proc_compare(ep->kp, kp))
						ep->kp = kp;
				}
				/*
				 * Proc debug option info; add to debug
				 * list using kinfo_proc kp_eproc.e_spare
				 * as next pointer; ptr to ptr avoids the
				 * ptr = long assumption.
				 */
				dkp = ep->dkp;
				ep->dkp = kp;
				debugproc(kp) = dkp;
			}
		}
	}
	if ((ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) == -1 &&
	     ioctl(STDERR_FILENO, TIOCGWINSZ, &ws) == -1 &&
	     ioctl(STDIN_FILENO, TIOCGWINSZ, &ws) == -1) || ws.ws_col == 0)
	       ttywidth = 79;
        else
	       ttywidth = ws.ws_col - 1;
	argwidth = ttywidth - WUSED;
	if (argwidth < 4)
		argwidth = 8;
	for (ep = ehead; ep != NULL; ep = ep->next) {
		if (ep->kp == NULL) {
			ep->args = "-";
			continue;
		}
		ep->args = fmt_argv(kvm_getargv(kd, ep->kp, argwidth),
		    ep->kp->kp_comm, MAXCOMLEN);
		if (ep->args == NULL)
			err(1, NULL);
	}
	/* sort by idle time */
	if (sortidle && ehead != NULL) {
		struct entry *from, *save;

		from = ehead;
		ehead = NULL;
		while (from != NULL) {
			for (nextp = &ehead;
			    (*nextp) && from->idle >= (*nextp)->idle;
			    nextp = &(*nextp)->next)
				continue;
			save = from;
			from = from->next;
			save->next = *nextp;
			*nextp = save;
		}
	}

	if (!nflag) {
		if (gethostname(domain, sizeof(domain)) < 0 ||
		    (p = strchr(domain, '.')) == NULL)
			domain[0] = '\0';
		else {
			domain[sizeof(domain) - 1] = '\0';
			memmove(domain, p, strlen(p) + 1);
		}
	}

	for (ep = ehead; ep != NULL; ep = ep->next) {
		char host_buf[UT_HOSTSIZE + 1];

		host_buf[UT_HOSTSIZE] = '\0';
		strncpy(host_buf, ep->utmp.ut_host, UT_HOSTSIZE);
		p = *host_buf ? host_buf : "-";
		if ((x = strchr(p, ':')) != NULL)
			*x++ = '\0';
		if (!nflag && isdigit(*p) && (l = inet_addr(p)) != -1 &&
		    (hp = gethostbyaddr(&l, sizeof(l), AF_INET))) {
			if (domain[0] != '\0') {
				p = hp->h_name;
				p += strlen(hp->h_name);
				p -= strlen(domain);
				if (p > hp->h_name &&
				    strcasecmp(p, domain) == 0)
					*p = '\0';
			}
			p = hp->h_name;
		}
		if (nflag && *p && strcmp(p, "-") &&
		    inet_addr(p) == INADDR_NONE) {
			hp = gethostbyname(p);

			if (hp != NULL) {
				struct in_addr in;

				memmove(&in, hp->h_addr, sizeof(in));
				p = inet_ntoa(in);
			}
		}
		if (x) {
			(void)snprintf(buf, sizeof(buf), "%s:%s", p, x);
			p = buf;
		}
		if (dflag) {
			for (dkp = ep->dkp; dkp != NULL; dkp = debugproc(dkp)) {
				char *ptr;

				ptr = fmt_argv(kvm_getargv(kd, dkp, argwidth),
				    dkp->kp_comm, MAXCOMLEN);
				if (ptr == NULL)
					ptr = "-";
				(void)printf("\t\t%-9d %s\n",
				    dkp->kp_pid, ptr);
			}
		}
		(void)printf("%-*.*s %-*.*s %-*.*s ",
		    UT_NAMESIZE, UT_NAMESIZE, ep->utmp.ut_name,
		    UT_LINESIZE, UT_LINESIZE,
		    strncmp(ep->utmp.ut_line, "tty", 3) &&
		    strncmp(ep->utmp.ut_line, "cua", 3) ?
		    ep->utmp.ut_line : ep->utmp.ut_line + 3,
		    UT_HOSTSIZE, UT_HOSTSIZE, *p ? p : "-");
		pr_attime(&ep->utmp.ut_time, &now);
		longidle = pr_idle(ep->idle);
		(void)printf("%.*s\n", argwidth - longidle, ep->args);
	}
	(void)kvm_close(kd);
	exit(0);
}

static void
pr_header(time_t *nowp, int nusers)
{
	double avenrun[3];
	time_t uptime;
	int days, hrs, i, mins, secs;
	int mib[2];
	size_t size;
	char buf[256];

	/*
	 * Print time of day.
	 */
	(void)strftime(buf, sizeof(buf)	- 1,
		       use_ampm	? "%l:%M%p" : "%k:%M", localtime(nowp));
	buf[sizeof(buf) - 1] = '\0';
	(void)printf("%s ", buf);

	/*
	 * Print how long system has been up.
	 * (Found by looking at "boottime" from the kernel)
	 */
	mib[0] = CTL_KERN;
	mib[1] = KERN_BOOTTIME;
	size = sizeof(boottime);
	if (sysctl(mib, 2, &boottime, &size, NULL, 0) != -1 &&
	    boottime.tv_sec != 0) {
		uptime = now - boottime.tv_sec;
		if (uptime > 60)
			uptime += 30;
		days = uptime / 86400;
		uptime %= 86400;
		hrs = uptime / 3600;
		uptime %= 3600;
		mins = uptime / 60;
		secs = uptime % 60;
		(void)printf(" up");
		if (days > 0)
			(void)printf(" %d day%s,", days, days > 1 ? "s" : "");
		if (hrs > 0 && mins > 0)
			(void)printf(" %2d:%02d,", hrs, mins);
		else if (hrs > 0)
			(void)printf(" %d hr%s,", hrs, hrs > 1 ? "s" : "");
		else if (mins > 0)
			(void)printf(" %d min%s,", mins, mins > 1 ? "s" : "");
		else
			(void)printf(" %d sec%s,", secs, secs > 1 ? "s" : "");
	}

	/* Print number of users logged in on system */
	(void)printf(" %d user%s", nusers, nusers == 1 ? "" : "s");

	/*
	 * Print 1, 5, and 15 minute load averages.
	 */
	if (getloadavg(avenrun, sizeof(avenrun) / sizeof(avenrun[0])) == -1)
		(void)printf(", no load average information available\n");
	else {
		(void)printf(", load averages:");
		for (i = 0; i < (sizeof(avenrun) / sizeof(avenrun[0])); i++) {
			if (use_comma && i > 0)
				(void)printf(",");
			(void)printf(" %.2f", avenrun[i]);
		}
		(void)printf("\n");
	}
}

static struct stat *
ttystat(char *line, int sz)
{
	static struct stat sb;
	char ttybuf[MAXPATHLEN];

	(void)snprintf(ttybuf, sizeof(ttybuf), "%s%.*s", _PATH_DEV, sz, line);
	if (stat(ttybuf, &sb)) {
		warn("%s", ttybuf);
		return (NULL);
	}
	return (&sb);
}

static void
usage(int wcmd)
{
	if (wcmd)
		(void)fprintf(stderr,
		    "usage: w [-dhin] [-M core] [-N system] [user ...]\n");
	else
		(void)fprintf(stderr, "usage: uptime\n");
	exit(1);
}

static int 
this_is_uptime(const char *s)
{
	const char *u;

	if ((u = strrchr(s, '/')) != NULL)
		++u;
	else
		u = s;
	if (strcmp(u, "uptime") == 0)
		return (0);
	return (-1);
}
Commit	Line	Data
984263bc MD	1	/*-
	2	* Copyright (c) 1980, 1991, 1993, 1994
	3	* The Regents of the University of California. All rights reserved.
	4	*
	5	* Redistribution and use in source and binary forms, with or without
	6	* modification, are permitted provided that the following conditions
	7	* are met:
	8	* 1. Redistributions of source code must retain the above copyright
	9	* notice, this list of conditions and the following disclaimer.
	10	* 2. Redistributions in binary form must reproduce the above copyright
	11	* notice, this list of conditions and the following disclaimer in the
	12	* documentation and/or other materials provided with the distribution.
	13	* 3. All advertising materials mentioning features or use of this software
	14	* must display the following acknowledgement:
	15	* This product includes software developed by the University of
	16	* California, Berkeley and its contributors.
	17	* 4. Neither the name of the University nor the names of its contributors
	18	* may be used to endorse or promote products derived from this software
	19	* without specific prior written permission.
	20	*
	21	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	22	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	23	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	24	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	25	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	26	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	27	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	28	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	29	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	30	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	31	* SUCH DAMAGE.
1de703da MD	32	*
	33	* @(#) Copyright (c) 1980, 1991, 1993, 1994 The Regents of the University of California. All rights reserved.
	34	* @(#)w.c 8.4 (Berkeley) 4/16/94
	35	* $FreeBSD: src/usr.bin/w/w.c,v 1.38.2.6 2002/03/12 19:51:51 phantom Exp $
416d05d7	36	* $DragonFly: src/usr.bin/w/w.c,v 1.10 2007/02/18 16:15:24 corecode Exp $
984263bc MD	37	*/
984263bc MD	38
984263bc MD	39	/*
	40	* w - print system status (who and what)
	41	*
	42	* This program is similar to the systat command on Tenex/Tops 10/20
	43	*
	44	*/
	45	#include <sys/param.h>
	46	#include <sys/time.h>
	47	#include <sys/stat.h>
	48	#include <sys/sysctl.h>
984263bc MD	49	#include <sys/user.h>
	50	#include <sys/ioctl.h>
	51	#include <sys/socket.h>
	52	#include <sys/tty.h>
	53
	54	#include <machine/cpu.h>
	55	#include <netinet/in.h>
	56	#include <arpa/inet.h>
	57
	58	#include <ctype.h>
	59	#include <err.h>
	60	#include <errno.h>
	61	#include <fcntl.h>
	62	#include <kvm.h>
	63	#include <limits.h>
	64	#include <langinfo.h>
	65	#include <locale.h>
	66	#include <netdb.h>
	67	#include <nlist.h>
	68	#include <paths.h>
	69	#include <stdio.h>
	70	#include <stdlib.h>
	71	#include <string.h>
	72	#include <unistd.h>
	73	#include <utmp.h>
	74	#include <vis.h>
	75
	76	#include <arpa/nameser.h>
	77	#include <resolv.h>
	78
	79	#include "extern.h"
	80
	81	struct timeval boottime;
	82	struct utmp utmp;
	83	struct winsize ws;
	84	kvm_t *kd;
	85	time_t now; /* the current time of day */
	86	time_t uptime; /* time of last reboot & elapsed time since */
	87	int ttywidth; /* width of tty */
	88	int argwidth; /* width of tty */
	89	int header = 1; /* true if -h flag: don't print heading */
	90	int nflag; /* true if -n flag: don't convert addrs */
	91	int dflag; /* true if -d flag: output debug info */
	92	int sortidle; /* sort by idle time */
	93	int use_ampm; /* use AM/PM time */
	94	int use_comma; /* use comma as floats separator */
	95	char *sel_users; / login array of particular users 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	char args; / arg list of interesting process */
	108	struct kinfo_proc dkp; / debug option proc list */
	109	} ep, ehead = NULL, **nextp = &ehead;
	110
5dfd06ac	111	#define debugproc(p) ((struct kinfo_proc *)&(p)->kp_spare[0])
984263bc	112
1d1731fa HP	113	static void pr_header(time_t *, int);
	114	static struct stat ttystat(char , int);
	115	static void usage(int);
	116	static int this_is_uptime(const char *s);
984263bc	117
1d1731fa	118	char fmt_argv(char , char , int); /* ../../bin/ps/fmt.c */
984263bc MD	119
984263bc MD	120	int
1d1731fa	121	main(int argc, char **argv)
984263bc MD	122	{
	123	struct kinfo_proc *kp;
	124	struct kinfo_proc *dkp;
	125	struct hostent *hp;
	126	struct stat *stp;
	127	FILE *ut;
	128	in_addr_t l;
	129	time_t touched;
	130	int ch, i, nentries, nusers, wcmd, longidle, dropgid;
	131	char memf, nlistf, p, x;
	132	char buf[MAXHOSTNAMELEN], errbuf[_POSIX2_LINE_MAX];
	133
	134	(void)setlocale(LC_ALL, "");
	135	use_ampm = (*nl_langinfo(T_FMT_AMPM) != '\0');
	136	use_comma = (*nl_langinfo(RADIXCHAR) != ',');
	137
	138	/* Are we w(1) or uptime(1)? */
	139	if (this_is_uptime(argv[0]) == 0) {
	140	wcmd = 0;
	141	p = "";
	142	} else {
	143	wcmd = 1;
	144	p = "dhiflM:N:nsuw";
	145	}
	146
	147	dropgid = 0;
	148	memf = nlistf = _PATH_DEVNULL;
	149	while ((ch = getopt(argc, argv, p)) != -1)
	150	switch (ch) {
	151	case 'd':
	152	dflag = 1;
	153	break;
	154	case 'h':
	155	header = 0;
	156	break;
	157	case 'i':
	158	sortidle = 1;
	159	break;
	160	case 'M':
	161	header = 0;
	162	memf = optarg;
	163	dropgid = 1;
	164	break;
	165	case 'N':
	166	nlistf = optarg;
	167	dropgid = 1;
	168	break;
	169	case 'n':
	170	nflag = 1;
	171	break;
	172	case 'f': case 'l': case 's': case 'u': case 'w':
	173	warnx("[-flsuw] no longer supported");
	174	/* FALLTHROUGH */
	175	case '?':
	176	default:
	177	usage(wcmd);
	178	}
	179	argc -= optind;
	180	argv += optind;
	181
	182	if (!(_res.options & RES_INIT))
	183	res_init();
	184	_res.retrans = 2; /* resolver timeout to 2 seconds per try */
	185	_res.retry = 1; /* only try once.. */
186
187	/*
188	* Discard setgid privileges if not the running kernel so that bad
189	* guys can't print interesting stuff from kernel memory.
190	*/
191	if (dropgid)
192	setgid(getgid());
193
194	if ((kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf)) == NULL)
195	errx(1, "%s", errbuf);
196
197	(void)time(&now);
198	if ((ut = fopen(_PATH_UTMP, "r")) == NULL)
199	err(1, "%s", _PATH_UTMP);
200
201	if (*argv)
202	sel_users = argv;
203
204	for (nusers = 0; fread(&utmp, sizeof(utmp), 1, ut);) {
205	if (utmp.ut_name[0] == '\0')
206	continue;
207	if (!(stp = ttystat(utmp.ut_line, UT_LINESIZE)))
208	continue; /* corrupted record */
209	++nusers;
210	if (wcmd == 0)
211	continue;
212	if (sel_users) {
213	int usermatch;
214	char **user;
215
216	usermatch = 0;
217	for (user = sel_users; !usermatch && *user; user++)
218	if (!strncmp(utmp.ut_name, *user, UT_NAMESIZE))
219	usermatch = 1;
220	if (!usermatch)
221	continue;
222	}
223	if ((ep = calloc(1, sizeof(struct entry))) == NULL)
224	errx(1, "calloc");
225	*nextp = ep;
226	nextp = &ep->next;
227	memmove(&ep->utmp, &utmp, sizeof(struct utmp));
228	ep->tdev = stp->st_rdev;
229	#ifdef CPU_CONSDEV
230	/*
231	* If this is the console device, attempt to ascertain
232	* the true console device dev_t.
233	*/
234	if (ep->tdev == 0) {
235	int mib[2];
236	size_t size;
237
238	mib[0] = CTL_MACHDEP;
239	mib[1] = CPU_CONSDEV;
240	size = sizeof(dev_t);
241	(void)sysctl(mib, 2, &ep->tdev, &size, NULL, 0);
242	}
243	#endif
244	touched = stp->st_atime;
245	if (touched < ep->utmp.ut_time) {
246	/* tty untouched since before login */
247	touched = ep->utmp.ut_time;
248	}
249	if ((ep->idle = now - touched) < 0)
250	ep->idle = 0;
251	}
252	(void)fclose(ut);
253
254	if (header \|\| wcmd == 0) {
255	pr_header(&now, nusers);
256	if (wcmd == 0) {
257	(void)kvm_close(kd);
258	exit(0);
259	}
260
261	#define HEADER_USER "USER"
262	#define HEADER_TTY "TTY"
263	#define HEADER_FROM "FROM"
264	#define HEADER_LOGIN_IDLE "LOGIN@ IDLE "
265	#define HEADER_WHAT "WHAT\n"
266	#define WUSED (UT_NAMESIZE + UT_LINESIZE + UT_HOSTSIZE + \
267	sizeof(HEADER_LOGIN_IDLE) + 3) /* header width incl. spaces */
268	(void)printf("%-.s %-.s %-.s %s",
269	UT_NAMESIZE, UT_NAMESIZE, HEADER_USER,
270	UT_LINESIZE, UT_LINESIZE, HEADER_TTY,
271	UT_HOSTSIZE, UT_HOSTSIZE, HEADER_FROM,
272	HEADER_LOGIN_IDLE HEADER_WHAT);
273	}
274
275	if ((kp = kvm_getprocs(kd, KERN_PROC_ALL, 0, &nentries)) == NULL)
276	err(1, "%s", kvm_geterr(kd));
277	for (i = 0; i < nentries; i++, kp++) {
416d05d7	278	if (kp->kp_stat == SIDL \|\| kp->kp_stat == SZOMB)
984263bc	279	continue;
984263bc	280	for (ep = ehead; ep != NULL; ep = ep->next) {
5dfd06ac	281	if (ep->tdev == kp->kp_tdev) {
984263bc MD	282	/*
	283	* proc is associated with this terminal
	284	*/
5dfd06ac	285	if (ep->kp == NULL && kp->kp_pgid == kp->kp_tpgid) {
984263bc MD	286	/*
	287	* Proc is 'most interesting'
	288	*/
5dfd06ac	289	if (proc_compare(ep->kp, kp))
984263bc MD	290	ep->kp = kp;
	291	}
	292	/*
	293	* Proc debug option info; add to debug
	294	* list using kinfo_proc kp_eproc.e_spare
	295	* as next pointer; ptr to ptr avoids the
	296	* ptr = long assumption.
	297	*/
	298	dkp = ep->dkp;
	299	ep->dkp = kp;
	300	debugproc(kp) = dkp;
	301	}
	302	}
	303	}
	304	if ((ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) == -1 &&
	305	ioctl(STDERR_FILENO, TIOCGWINSZ, &ws) == -1 &&
	306	ioctl(STDIN_FILENO, TIOCGWINSZ, &ws) == -1) \|\| ws.ws_col == 0)
	307	ttywidth = 79;
	308	else
	309	ttywidth = ws.ws_col - 1;
	310	argwidth = ttywidth - WUSED;
	311	if (argwidth < 4)
	312	argwidth = 8;
	313	for (ep = ehead; ep != NULL; ep = ep->next) {
	314	if (ep->kp == NULL) {
	315	ep->args = "-";
	316	continue;
	317	}
	318	ep->args = fmt_argv(kvm_getargv(kd, ep->kp, argwidth),
5dfd06ac	319	ep->kp->kp_comm, MAXCOMLEN);
984263bc MD	320	if (ep->args == NULL)
	321	err(1, NULL);
	322	}
	323	/* sort by idle time */
	324	if (sortidle && ehead != NULL) {
	325	struct entry from, save;
	326
	327	from = ehead;
	328	ehead = NULL;
	329	while (from != NULL) {
	330	for (nextp = &ehead;
	331	(nextp) && from->idle >= (nextp)->idle;
	332	nextp = &(*nextp)->next)
	333	continue;
	334	save = from;
	335	from = from->next;
	336	save->next = *nextp;
	337	*nextp = save;
	338	}
	339	}
	340
	341	if (!nflag) {
ca76ab12	342	if (gethostname(domain, sizeof(domain)) < 0 \|\|
984263bc MD	343	(p = strchr(domain, '.')) == NULL)
	344	domain[0] = '\0';
	345	else {
	346	domain[sizeof(domain) - 1] = '\0';
	347	memmove(domain, p, strlen(p) + 1);
	348	}
	349	}
	350
	351	for (ep = ehead; ep != NULL; ep = ep->next) {
	352	char host_buf[UT_HOSTSIZE + 1];
	353
	354	host_buf[UT_HOSTSIZE] = '\0';
	355	strncpy(host_buf, ep->utmp.ut_host, UT_HOSTSIZE);
	356	p = *host_buf ? host_buf : "-";
	357	if ((x = strchr(p, ':')) != NULL)
	358	*x++ = '\0';
	359	if (!nflag && isdigit(*p) && (l = inet_addr(p)) != -1 &&
15b85273	360	(hp = gethostbyaddr(&l, sizeof(l), AF_INET))) {
984263bc MD	361	if (domain[0] != '\0') {
	362	p = hp->h_name;
	363	p += strlen(hp->h_name);
	364	p -= strlen(domain);
	365	if (p > hp->h_name &&
	366	strcasecmp(p, domain) == 0)
	367	*p = '\0';
	368	}
	369	p = hp->h_name;
	370	}
	371	if (nflag && *p && strcmp(p, "-") &&
	372	inet_addr(p) == INADDR_NONE) {
	373	hp = gethostbyname(p);
	374
	375	if (hp != NULL) {
	376	struct in_addr in;
	377
	378	memmove(&in, hp->h_addr, sizeof(in));
	379	p = inet_ntoa(in);
	380	}
	381	}
	382	if (x) {
	383	(void)snprintf(buf, sizeof(buf), "%s:%s", p, x);
	384	p = buf;
	385	}
	386	if (dflag) {
	387	for (dkp = ep->dkp; dkp != NULL; dkp = debugproc(dkp)) {
	388	char *ptr;
	389
	390	ptr = fmt_argv(kvm_getargv(kd, dkp, argwidth),
5dfd06ac	391	dkp->kp_comm, MAXCOMLEN);
984263bc MD	392	if (ptr == NULL)
	393	ptr = "-";
	394	(void)printf("\t\t%-9d %s\n",
5dfd06ac	395	dkp->kp_pid, ptr);
984263bc MD	396	}
	397	}
	398	(void)printf("%-.s %-.s %-.s ",
	399	UT_NAMESIZE, UT_NAMESIZE, ep->utmp.ut_name,
	400	UT_LINESIZE, UT_LINESIZE,
	401	strncmp(ep->utmp.ut_line, "tty", 3) &&
	402	strncmp(ep->utmp.ut_line, "cua", 3) ?
	403	ep->utmp.ut_line : ep->utmp.ut_line + 3,
	404	UT_HOSTSIZE, UT_HOSTSIZE, *p ? p : "-");
	405	pr_attime(&ep->utmp.ut_time, &now);
	406	longidle = pr_idle(ep->idle);
	407	(void)printf("%.*s\n", argwidth - longidle, ep->args);
	408	}
	409	(void)kvm_close(kd);
	410	exit(0);
	411	}
	412
	413	static void
1d1731fa	414	pr_header(time_t *nowp, int nusers)
984263bc MD	415	{
	416	double avenrun[3];
	417	time_t uptime;
	418	int days, hrs, i, mins, secs;
	419	int mib[2];
	420	size_t size;
	421	char buf[256];
	422
	423	/*
	424	* Print time of day.
	425	*/
	426	(void)strftime(buf, sizeof(buf) - 1,
	427	use_ampm ? "%l:%M%p" : "%k:%M", localtime(nowp));
	428	buf[sizeof(buf) - 1] = '\0';
	429	(void)printf("%s ", buf);
	430
	431	/*
	432	* Print how long system has been up.
09bf16f5	433	* (Found by looking at "boottime" from the kernel)
984263bc MD	434	*/
	435	mib[0] = CTL_KERN;
	436	mib[1] = KERN_BOOTTIME;
	437	size = sizeof(boottime);
	438	if (sysctl(mib, 2, &boottime, &size, NULL, 0) != -1 &&
	439	boottime.tv_sec != 0) {
	440	uptime = now - boottime.tv_sec;
	441	if (uptime > 60)
	442	uptime += 30;
	443	days = uptime / 86400;
	444	uptime %= 86400;
	445	hrs = uptime / 3600;
	446	uptime %= 3600;
	447	mins = uptime / 60;
	448	secs = uptime % 60;
	449	(void)printf(" up");
	450	if (days > 0)
	451	(void)printf(" %d day%s,", days, days > 1 ? "s" : "");
	452	if (hrs > 0 && mins > 0)
	453	(void)printf(" %2d:%02d,", hrs, mins);
	454	else if (hrs > 0)
	455	(void)printf(" %d hr%s,", hrs, hrs > 1 ? "s" : "");
	456	else if (mins > 0)
	457	(void)printf(" %d min%s,", mins, mins > 1 ? "s" : "");
	458	else
	459	(void)printf(" %d sec%s,", secs, secs > 1 ? "s" : "");
	460	}
	461
09bf16f5	462	/* Print number of users logged in on system */
984263bc MD	463	(void)printf(" %d user%s", nusers, nusers == 1 ? "" : "s");
	464
	465	/*
	466	* Print 1, 5, and 15 minute load averages.
	467	*/
	468	if (getloadavg(avenrun, sizeof(avenrun) / sizeof(avenrun[0])) == -1)
	469	(void)printf(", no load average information available\n");
	470	else {
	471	(void)printf(", load averages:");
	472	for (i = 0; i < (sizeof(avenrun) / sizeof(avenrun[0])); i++) {
	473	if (use_comma && i > 0)
	474	(void)printf(",");
	475	(void)printf(" %.2f", avenrun[i]);
	476	}
	477	(void)printf("\n");
	478	}
	479	}
	480
	481	static struct stat *
1d1731fa	482	ttystat(char *line, int sz)
984263bc MD	483	{
	484	static struct stat sb;
	485	char ttybuf[MAXPATHLEN];
	486
	487	(void)snprintf(ttybuf, sizeof(ttybuf), "%s%.*s", _PATH_DEV, sz, line);
	488	if (stat(ttybuf, &sb)) {
	489	warn("%s", ttybuf);
	490	return (NULL);
	491	}
	492	return (&sb);
	493	}
	494
	495	static void
1d1731fa	496	usage(int wcmd)
984263bc MD	497	{
	498	if (wcmd)
	499	(void)fprintf(stderr,
	500	"usage: w [-dhin] [-M core] [-N system] [user ...]\n");
	501	else
	502	(void)fprintf(stderr, "usage: uptime\n");
	503	exit(1);
	504	}
	505
	506	static int
1d1731fa	507	this_is_uptime(const char *s)
984263bc MD	508	{
	509	const char *u;
	510
	511	if ((u = strrchr(s, '/')) != NULL)
	512	++u;
	513	else
	514	u = s;
	515	if (strcmp(u, "uptime") == 0)
	516	return (0);
	517	return (-1);
	518	}