initial import of NetBSD tree

7 files changed, 911 insertions, 0 deletions

diff --git a/usr.bin/w/Makefile b/usr.bin/w/Makefile
new file mode 100644
index 00000000000..876c196ab0a
--- /dev/null
+++ b/usr.bin/w/Makefile
@@ -0,0 +1,14 @@
+#	@(#)Makefile	8.1 (Berkeley) 6/6/93
+
+PROG=	w
+SRCS=	fmt.c pr_time.c proc_compare.c w.c
+MAN=	w.1 uptime.1
+DPADD=	${LIBKVM}
+LDADD=	-lkvm
+BINGRP=	kmem
+BINMODE=2555
+LINKS=	${BINDIR}/w ${BINDIR}/uptime
+
+.PATH: ${.CURDIR}/../../bin/ps
+
+.include <bsd.prog.mk>
diff --git a/usr.bin/w/extern.h b/usr.bin/w/extern.h
new file mode 100644
index 00000000000..3ee843b09da
--- /dev/null
+++ b/usr.bin/w/extern.h
@@ -0,0 +1,41 @@
+/*-
+ * Copyright (c) 1993
+ *	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.
+ *
+ *	@(#)extern.h	8.1 (Berkeley) 6/6/93
+ */
+
+struct proc;
+void	fmt_puts __P((char *, int *));
+void	fmt_putc __P((int, int *));
+void	pr_attime __P((time_t *, time_t *));
+void	pr_idle __P((time_t));
+int	proc_compare __P((struct proc *, struct proc *));
diff --git a/usr.bin/w/pr_time.c b/usr.bin/w/pr_time.c
new file mode 100644
index 00000000000..87fffb36333
--- /dev/null
+++ b/usr.bin/w/pr_time.c
@@ -0,0 +1,104 @@
+/*-
+ * Copyright (c) 1990, 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.
+ */
+
+#ifndef lint
+static char sccsid[] = "@(#)pr_time.c	8.2 (Berkeley) 4/4/94";
+#endif /* not lint */
+
+#include <sys/types.h>
+#include <sys/time.h>
+
+#include <stdio.h>
+#include <string.h>
+#include <tzfile.h>
+
+#include "extern.h"
+
+/*
+ * pr_attime --
+ *	Print the time since the user logged in. 
+ *
+ *	Note: SCCS forces the bizarre string manipulation, things like
+ *	8.2 get replaced in the source code.
+ */
+void
+pr_attime(started, now)
+	time_t *started, *now;
+{
+	static char buf[256];
+	struct tm *tp;
+	time_t diff;
+	char fmt[20];
+
+	tp = localtime(started);
+	diff = *now - *started;
+
+	/* If more than a week, use day-month-year. */
+	if (diff > SECSPERDAY * DAYSPERWEEK)
+		(void)strcpy(fmt, "%d%b%y");
+
+	/* If not today, use day-hour-am/pm. */
+	else if (*now / SECSPERDAY != *started / SECSPERDAY) {
+		(void)strcpy(fmt, __CONCAT("%a%", "I%p"));
+	}
+
+	/* Default is hh:mm{am,pm}. */
+	else {
+		(void)strcpy(fmt, __CONCAT("%l:%", "M%p"));
+	}
+
+	(void)strftime(buf, sizeof(buf), fmt, tp);
+	(void)printf("%s", buf);
+}
+
+/*
+ * pr_idle --
+ *	Display the idle time.
+ */
+void
+pr_idle(idle)
+	time_t idle;
+{
+	/* If idle more than 36 hours, print as a number of days. */
+	if (idle >= 36 * SECSPERHOUR)
+		(void)printf(" %ddays ", idle / SECSPERDAY);
+
+	/* If idle more than an hour, print as HH:MM. */
+	else if (idle >= SECSPERHOUR)
+		(void)printf(" %2d:%02d ",
+		    idle / SECSPERHOUR, (idle % SECSPERHOUR) / SECSPERMIN);
+
+	/* Else print the minutes idle. */
+	else
+		(void)printf("    %2d ", idle / SECSPERMIN);
+}
diff --git a/usr.bin/w/proc_compare.c b/usr.bin/w/proc_compare.c
new file mode 100644
index 00000000000..e95359c9d25
--- /dev/null
+++ b/usr.bin/w/proc_compare.c
@@ -0,0 +1,120 @@
+/*-
+ * Copyright (c) 1990, 1993
+ *	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.
+ */
+
+#ifndef lint
+static char sccsid[] = "@(#)proc_compare.c	8.2 (Berkeley) 9/23/93";
+#endif /* not lint */
+
+#include <sys/param.h>
+#include <sys/time.h>
+#include <sys/proc.h>
+
+#include "extern.h"
+
+/*
+ * Returns 1 if p2 is "better" than p1
+ *
+ * The algorithm for picking the "interesting" process is thus:
+ *
+ *	1) Only foreground processes are eligible - implied.
+ *	2) Runnable processes are favored over anything else.  The runner
+ *	   with the highest cpu utilization is picked (p_estcpu).  Ties are
+ *	   broken by picking the highest pid.
+ *	3) The sleeper with the shortest sleep time is next.  With ties,
+ *	   we pick out just "short-term" sleepers (P_SINTR == 0).
+ *	4) Further ties are broken by picking the highest pid.
+ *
+ * If you change this, be sure to consider making the change in the kernel
+ * too (^T in kern/tty.c).
+ *
+ * TODO - consider whether pctcpu should be used.
+ */
+
+#define ISRUN(p)	(((p)->p_stat == SRUN) || ((p)->p_stat == SIDL))
+#define TESTAB(a, b)    ((a)<<1 | (b))
+#define ONLYA   2
+#define ONLYB   1
+#define BOTH    3
+
+int
+proc_compare(p1, p2)
+	register struct proc *p1, *p2;
+{
+
+	if (p1 == NULL)
+		return (1);
+	/*
+	 * see if at least one of them is runnable
+	 */
+	switch (TESTAB(ISRUN(p1), ISRUN(p2))) {
+	case ONLYA:
+		return (0);
+	case ONLYB:
+		return (1);
+	case BOTH:
+		/*
+		 * tie - favor one with highest recent cpu utilization
+		 */
+		if (p2->p_estcpu > p1->p_estcpu)
+			return (1);
+		if (p1->p_estcpu > p2->p_estcpu)
+			return (0);
+		return (p2->p_pid > p1->p_pid);	/* tie - return highest pid */
+	}
+	/*
+ 	 * weed out zombies
+	 */
+	switch (TESTAB(p1->p_stat == SZOMB, p2->p_stat == SZOMB)) {
+	case ONLYA:
+		return (1);
+	case ONLYB:
+		return (0);
+	case BOTH:
+		return (p2->p_pid > p1->p_pid); /* tie - return highest pid */
+	}
+	/*
+	 * pick the one with the smallest sleep time
+	 */
+	if (p2->p_slptime > p1->p_slptime)
+		return (0);
+	if (p1->p_slptime > p2->p_slptime)
+		return (1);
+	/*
+	 * favor one sleeping in a non-interruptible sleep
+	 */
+	if (p1->p_flag & P_SINTR && (p2->p_flag & P_SINTR) == 0)
+		return (1);
+	if (p2->p_flag & P_SINTR && (p1->p_flag & P_SINTR) == 0)
+		return (0);
+	return (p2->p_pid > p1->p_pid);		/* tie - return highest pid */
+}
diff --git a/usr.bin/w/uptime.1 b/usr.bin/w/uptime.1
new file mode 100644
index 00000000000..8290da95ace
--- /dev/null
+++ b/usr.bin/w/uptime.1
@@ -0,0 +1,60 @@
+.\" Copyright (c) 1980, 1990, 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.
+.\"
+.\"     @(#)uptime.1	8.2 (Berkeley) 4/18/94
+.\"
+.Dd April 18, 1994
+.Dt UPTIME 1
+.Os BSD 3
+.Sh NAME
+.Nm uptime
+.Nd show how long system has been running
+.Sh SYNOPSIS
+.Nm uptime
+.Sh DESCRIPTION
+The 
+.Nm uptime
+utility displays the current time,
+the length of time the system has been up,
+the number of users, and the load average of the system over the last
+1, 5, and 15 minutes.
+.Sh FILES
+.Bl -tag -width /netbsd
+.It Pa /netbsd
+system name list
+.El
+.Sh SEE ALSO
+.Xr w 1
+.Sh HISTORY
+The
+.Nm
+command appeared in
+.Bx 3.0 .
diff --git a/usr.bin/w/w.1 b/usr.bin/w/w.1
new file mode 100644
index 00000000000..d66e6e0e2fe
--- /dev/null
+++ b/usr.bin/w/w.1
@@ -0,0 +1,141 @@
+.\" Copyright (c) 1980, 1990, 1991, 1993
+.\"	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.
+.\"
+.\"     @(#)w.1	8.1 (Berkeley) 6/6/93
+.\"
+.Dd June 6, 1993
+.Dt W 1
+.Os BSD 4
+.Sh NAME
+.Nm w
+.Nd "who present users are and what they are doing"
+.Sh SYNOPSIS
+.Nm w
+.Op Fl hin
+.Op Fl M Ar core
+.Op Fl N Ar system
+.Op Ar user
+.Sh DESCRIPTION
+The
+.Nm w
+utility prints a summary of the current activity on the system,
+including what each user is doing.
+The first line displays the current time of day, how long the system has
+been running, the number of users logged into the system, and the load
+averages.
+The load average numbers give the number of jobs in the run queue averaged
+over 1, 5 and 15 minutes.
+.Pp
+The fields output are the user's login name, the name of the terminal the
+user is on, the host from which the user is logged in, the time the user
+logged on, the time since the user last typed anything,
+and the name and arguments of the current process.
+.Pp
+The options are as follows:
+.Bl -tag -width Ds
+.It Fl h
+Suppress the heading.
+.It Fl i
+Output is sorted by idle time.
+.It Fl M
+Extract values associated with the name list from the specified
+core instead of the default
+.Dq /dev/kmem .
+.It Fl N
+Extract the name list from the specified system instead of the
+default
+.Dq /netbsd .
+.It Fl n
+Show network addresses as numbers (normally
+.Nm w
+interprets addresses and attempts to display them symbolically).
+.El
+.Pp
+If a
+.Ar user
+name is specified, the output is restricted to that user.
+.Sh FILES
+.Bl -tag -width /var/run/utmp -compact
+.It Pa /var/run/utmp
+list of users on the system
+.El
+.Sh SEE ALSO
+.Xr who 1 ,
+.Xr finger 1 ,
+.Xr ps 1 ,
+.Xr uptime 1 ,
+.Sh BUGS
+The notion of the
+.Dq current process
+is muddy.
+The current algorithm is ``the highest numbered process on the terminal
+that is not ignoring interrupts, or, if there is none, the highest numbered
+process on the terminal''.
+This fails, for example, in critical sections of programs like the shell
+and editor, or when faulty programs running in the background fork and fail
+to ignore interrupts.
+(In cases where no process can be found,
+.Nm w
+prints
+.Dq \- . )
+.Pp
+The
+.Tn CPU
+time is only an estimate, in particular, if someone leaves a background
+process running after logging out, the person currently on that terminal is
+.Dq charged
+with the time.
+.Pp
+Background processes are not shown, even though they account for
+much of the load on the system.
+.Pp
+Sometimes processes, typically those in the background, are printed with
+null or garbaged arguments.
+In these cases, the name of the command is printed in parentheses.
+.Pp
+The 
+.Nm w
+utility does not know about the new conventions for detection of background
+jobs.
+It will sometimes find a background job instead of the right one.
+.Sh COMPATIBILITY
+The
+.Fl f ,
+.Fl l ,
+.Fl s ,
+and
+.Fl w
+flags are no longer supported.
+.Sh HISTORY
+The
+.Nm
+command appeared in
+.Ux 3.0 .
diff --git a/usr.bin/w/w.c b/usr.bin/w/w.c
new file mode 100644
index 00000000000..25d3cdbcb30
--- /dev/null
+++ b/usr.bin/w/w.c
@@ -0,0 +1,431 @@
+/*-
+ * 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.
+ */
+
+#ifndef lint
+static char copyright[] =
+"@(#) Copyright (c) 1980, 1991, 1993, 1994\n\
+	The Regents of the University of California.  All rights reserved.\n";
+#endif /* not lint */
+
+#ifndef lint
+static char sccsid[] = "@(#)w.c	8.4 (Berkeley) 4/16/94";
+#endif /* not lint */
+
+/*
+ * 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/proc.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 <netdb.h>
+#include <nlist.h>
+#include <paths.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <tzfile.h>
+#include <unistd.h>
+#include <utmp.h>
+#include <vis.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		sortidle;	/* sort bu idle time */
+char	       *sel_user;	/* login of particular user 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 */
+} *ep, *ehead = NULL, **nextp = &ehead;
+
+static void	 pr_args __P((struct kinfo_proc *));
+static void	 pr_header __P((time_t *, int));
+static struct stat
+		*ttystat __P((char *));
+static void	 usage __P((int));
+
+int
+main(argc, argv)
+	int argc;
+	char **argv;
+{
+	extern char *__progname;
+	struct kinfo_proc *kp;
+	struct hostent *hp;
+	struct stat *stp;
+	FILE *ut;
+	u_long l;
+	int ch, i, nentries, nusers, wcmd;
+	char *memf, *nlistf, *p, *x;
+	char buf[MAXHOSTNAMELEN], errbuf[256];
+
+	/* Are we w(1) or uptime(1)? */
+	p = __progname;
+	if (*p == '-')
+		p++;
+	if (*p == 'u') {
+		wcmd = 0;
+		p = "";
+	} else {
+		wcmd = 1;
+		p = "hiflM:N:nsuw";
+	}
+
+	memf = nlistf = NULL;
+	while ((ch = getopt(argc, argv, p)) != EOF)
+		switch (ch) {
+		case 'h':
+			header = 0;
+			break;
+		case 'i':
+			sortidle = 1;
+			break;
+		case 'M':
+			header = 0;
+			memf = optarg;
+			break;
+		case 'N':
+			nlistf = optarg;
+			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 ((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_user = *argv;
+
+	for (nusers = 0; fread(&utmp, sizeof(utmp), 1, ut);) {
+		if (utmp.ut_name[0] == '\0')
+			continue;
+		++nusers;
+		if (wcmd == 0 || (sel_user &&
+		    strncmp(utmp.ut_name, sel_user, UT_NAMESIZE) != 0))
+			continue;
+		if ((ep = calloc(1, sizeof(struct entry))) == NULL)
+			err(1, NULL);
+		*nextp = ep;
+		nextp = &(ep->next);
+		memmove(&(ep->utmp), &utmp, sizeof(struct utmp));
+		if (!(stp = ttystat(ep->utmp.ut_line)))
+			continue;
+		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
+		if ((ep->idle = now - stp->st_atime) < 0)
+			ep->idle = 0;
+	}
+	(void)fclose(ut);
+
+	if (header || wcmd == 0) {
+		pr_header(&now, nusers);
+		if (wcmd == 0)
+			exit (0);
+	}
+
+#define HEADER	"USER    TTY FROM              LOGIN@  IDLE WHAT\n"
+#define WUSED	(sizeof (HEADER) - sizeof ("WHAT\n"))
+	(void)printf(HEADER);
+
+	if ((kp = kvm_getprocs(kd, KERN_PROC_ALL, 0, &nentries)) == NULL)
+		err(1, "%s", kvm_geterr(kd));
+	for (i = 0; i < nentries; i++, kp++) {
+		struct proc *p = &kp->kp_proc;
+		struct eproc *e;
+
+		if (p->p_stat == SIDL || p->p_stat == SZOMB)
+			continue;
+		e = &kp->kp_eproc;
+		for (ep = ehead; ep != NULL; ep = ep->next) {
+			if (ep->tdev == e->e_tdev && e->e_pgid == e->e_tpgid) {
+				/*
+				 * Proc is in foreground of this terminal
+				 */
+				if (proc_compare(&ep->kp->kp_proc, p))
+					ep->kp = kp;
+				break;
+			}
+		}
+	}
+	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;
+	/* sort by idle time */
+	if (sortidle && ehead != NULL) {
+		struct entry *from = ehead, *save;
+		
+		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) - 1) < 0 ||
+		    (p = strchr(domain, '.')) == 0)
+			domain[0] = '\0';
+		else {
+			domain[sizeof(domain) - 1] = '\0';
+			memmove(domain, p, strlen(p) + 1);
+		}
+
+	for (ep = ehead; ep != NULL; ep = ep->next) {
+		p = *ep->utmp.ut_host ? ep->utmp.ut_host : "-";
+		if ((x = strchr(p, ':')) != NULL)
+			*x++ = '\0';
+		if (!nflag && isdigit(*p) &&
+		    (long)(l = inet_addr(p)) != -1 &&
+		    (hp = gethostbyaddr((char *)&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 && strcmp(p, domain) == 0)
+					*p = '\0';
+			}
+			p = hp->h_name;
+		}
+		if (x) {
+			(void)snprintf(buf, sizeof(buf), "%s:%.*s", p,
+			    ep->utmp.ut_host + UT_HOSTSIZE - x, x);
+			p = buf;
+		}
+		(void)printf("%-*.*s %-2.2s %-*.*s ",
+		    UT_NAMESIZE, UT_NAMESIZE, ep->utmp.ut_name,
+		    strncmp(ep->utmp.ut_line, "tty", 3) ?
+		    ep->utmp.ut_line : ep->utmp.ut_line + 3,
+		    UT_HOSTSIZE, UT_HOSTSIZE, *p ? p : "-");
+		pr_attime(&ep->utmp.ut_time, &now);
+		pr_idle(ep->idle);
+		pr_args(ep->kp);
+		printf("\n");
+	}
+	exit(0);
+}
+
+static void
+pr_args(kp)
+	struct kinfo_proc *kp;
+{
+	char **argv;
+	int left;
+
+	if (kp == 0)
+		goto nothing;
+	left = argwidth;
+	argv = kvm_getargv(kd, kp, argwidth);
+	if (argv == 0)
+		goto nothing;
+	while (*argv) {
+		fmt_puts(*argv, &left);
+		argv++;
+		fmt_putc(' ', &left);
+	}
+	return;
+nothing:
+	putchar('-');
+}
+
+static void
+pr_header(nowp, nusers)
+	time_t *nowp;
+	int nusers;
+{
+	double avenrun[3];
+	time_t uptime;
+	int days, hrs, i, mins;
+	int mib[2];
+	size_t size;
+	char buf[256];
+
+	/*
+	 * Print time of day.
+	 *
+	 * SCCS forces the string manipulation below, as it replaces
+	 * %, M, and % in a character string with the file name.
+	 */
+	(void)strftime(buf, sizeof(buf),
+	    __CONCAT("%l:%","M%p"), localtime(nowp));
+	(void)printf("%s ", buf);
+
+	/*
+	 * Print how long system has been up.
+	 * (Found by looking getting "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;
+		uptime += 30;
+		days = uptime / SECSPERDAY;
+		uptime %= SECSPERDAY;
+		hrs = uptime / SECSPERHOUR;
+		uptime %= SECSPERHOUR;
+		mins = uptime / SECSPERMIN;
+		(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" : "");
+			if (mins > 0)
+				(void)printf(" %d min%s,",
+				    mins, mins > 1 ? "s" : "");
+		}
+	}
+
+	/* Print number of users logged in to 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 (i > 0)
+				(void)printf(",");
+			(void)printf(" %.2f", avenrun[i]);
+		}
+		(void)printf("\n");
+	}
+}
+
+static struct stat *
+ttystat(line)
+	char *line;
+{
+	static struct stat sb;
+	char ttybuf[MAXPATHLEN];
+
+	(void)snprintf(ttybuf, sizeof(ttybuf), "%s/%s", _PATH_DEV, line);
+	if (stat(ttybuf, &sb))
+		return (NULL);
+	return (&sb);
+}
+
+static void
+usage(wcmd)
+	int wcmd;
+{
+	if (wcmd)
+		(void)fprintf(stderr,
+		    "usage: w: [-hin] [-M core] [-N system] [user]\n");
+	else
+		(void)fprintf(stderr, "uptime\n");
+	exit (1);
+}