initial import of NetBSD tree

3 files changed, 377 insertions, 0 deletions

diff --git a/usr.bin/who/Makefile b/usr.bin/who/Makefile
new file mode 100644
index 00000000000..0c6b9e7ce7c
--- /dev/null
+++ b/usr.bin/who/Makefile
@@ -0,0 +1,6 @@
+#	$NetBSD: Makefile,v 1.3 1994/11/14 05:13:14 jtc Exp $
+#	@(#)Makefile	8.1 (Berkeley) 6/6/93
+
+PROG=	who
+
+.include <bsd.prog.mk>
diff --git a/usr.bin/who/who.1 b/usr.bin/who/who.1
new file mode 100644
index 00000000000..c2bf9983156
--- /dev/null
+++ b/usr.bin/who/who.1
@@ -0,0 +1,132 @@
+.\"	$NetBSD: who.1,v 1.5 1994/12/07 04:28:47 jtc Exp $
+.\"
+.\" Copyright (c) 1986, 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.
+.\"
+.\"     @(#)who.1	8.2 (Berkeley) 12/30/93
+.\"
+.Dd December 6, 1994
+.Dt WHO 1
+.Os
+.Sh NAME
+.Nm who
+.Nd display who is logged in
+.Sh SYNOPSIS
+.Nm who
+.Op Fl mTu
+.Op Ar file 
+.Nm who
+.Ar am i
+.Sh DESCRIPTION
+The 
+.Nm who
+utility displays a list of all users currently logged on, showing for
+each user the login name, tty name, the date and time of login, and
+hostname if not local.
+.Pp
+Available options:
+.Pp
+.Bl -tag -width file
+.It Fl m
+Only print information about the current terminal.  This is the
+.Tn POSIX
+way of saying
+.Nm who 
+.Ar am i .
+.It Fl T
+Print a character after the user name indicating the state of the
+terminal line:
+.Sq + 
+if the terminal is writable;
+.Sq - 
+if it is not;
+and
+.Sq ?
+if a bad line is encountered.
+.It Fl u
+Print the idle time for each user.
+.It Ar \&am I
+Returns the invoker's real user name. 
+.It Ar file
+By default,
+.Nm who
+gathers information from the file
+.Pa /var/run/utmp .
+An alternate
+.Ar file
+may be specified which is usually
+.Pa /var/log/wtmp
+(or
+.Pa /var/log/wtmp.[0-6]
+depending on site policy as
+.Pa wtmp
+can grow quite large and daily versions may or may not
+be kept around after compression by
+.Xr ac 8 ) .
+The
+.Pa wtmp
+file contains a record of every login, logout,
+crash, shutdown and date change
+since
+.Pa wtmp
+was last truncated or
+created.
+.El
+.Pp
+If
+.Pa /var/log/wtmp
+is being used as the file, the user name may be empty
+or one of the special characters '|', '}' and '~'.  Logouts produce
+an output line without any user name.  For more information on the
+special characters, see
+.Xr utmp 5 .
+.Sh FILES
+.Bl -tag -width /var/log/wtmp.[0-6] -compact
+.It Pa /var/run/utmp
+.It Pa /var/log/wtmp
+.It Pa /var/log/wtmp.[0-6]
+.El
+.Sh SEE ALSO
+.Xr last 1 ,
+.Xr mesg 1 ,
+.Xr users 1 ,
+.Xr getuid 2 ,
+.Xr utmp 5
+.Sh HISTORY
+A
+.Nm
+utility appeared in
+.At v6 .
+.Sh STANDARDS
+The
+.Nm
+utility is expected to conform to
+.St -p1003.2-92 .
diff --git a/usr.bin/who/who.c b/usr.bin/who/who.c
new file mode 100644
index 00000000000..743d36be45b
--- /dev/null
+++ b/usr.bin/who/who.c
@@ -0,0 +1,239 @@
+/*	$NetBSD: who.c,v 1.4 1994/12/07 04:28:49 jtc Exp $	*/
+
+/*
+ * Copyright (c) 1989, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Michael Fischbein.
+ *
+ * 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) 1989, 1993\n\
+	The Regents of the University of California.  All rights reserved.\n";
+#endif /* not lint */
+
+#ifndef lint
+#if 0
+static char sccsid[] = "@(#)who.c	8.1 (Berkeley) 6/6/93";
+#endif
+static char rcsid[] = "$NetBSD: who.c,v 1.4 1994/12/07 04:28:49 jtc Exp $";
+#endif /* not lint */
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <pwd.h>
+#include <utmp.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <time.h>
+#include <err.h>
+
+void output __P((struct utmp *));
+void who_am_i __P((FILE *));
+void usage __P((void));
+int only_current_term;		/* show info about the current terminal only */
+int show_term;			/* show term state */
+int show_idle;			/* show idle time */
+
+int
+main(argc, argv)
+	int argc;
+	char **argv;
+{
+	struct utmp usr;
+	FILE *ufp, *file();
+	int c;
+
+	while ((c = getopt(argc, argv, "mTu")) != -1) {
+		switch (c) {
+		case 'm':
+			only_current_term = 1;
+			break;
+		case 'T':
+			show_term = 1;
+			break;
+		case 'u':
+			show_idle = 1;
+			break;
+		default:
+			usage();
+			/* NOTREACHED */
+		}
+	}
+	argc -= optind;
+	argv += optind;
+
+	if (chdir("/dev")) {
+		err(1, "cannot change directory to /dev");
+		/* NOTREACHED */
+	}
+
+	switch (argc) {
+	case 0:					/* who */
+		ufp = file(_PATH_UTMP);
+
+		if (only_current_term) {
+			who_am_i(ufp);
+		} else {
+			/* only entries with both name and line fields */
+			while (fread((char *)&usr, sizeof(usr), 1, ufp) == 1)
+				if (*usr.ut_name && *usr.ut_line)
+					output(&usr);
+		}
+		break;
+	case 1:					/* who utmp_file */
+		ufp = file(*argv);
+
+		if (only_current_term) {
+			who_am_i(ufp);
+		} else {
+			/* all entries */
+			while (fread((char *)&usr, sizeof(usr), 1, ufp) == 1)
+				output(&usr);
+		}
+		break;
+	case 2:					/* who am i */
+		ufp = file(_PATH_UTMP);
+		who_am_i(ufp);
+		break;
+	default:
+		usage();
+		/* NOTREACHED */
+	}
+	exit(0);
+}
+
+void
+who_am_i(ufp)
+	FILE *ufp;
+{
+	struct utmp usr;
+	struct passwd *pw;
+	register char *p;
+	char *t;
+
+	/* search through the utmp and find an entry for this tty */
+	if (p = ttyname(0)) {
+		/* strip any directory component */
+		if (t = rindex(p, '/'))
+			p = t + 1;
+		while (fread((char *)&usr, sizeof(usr), 1, ufp) == 1)
+			if (usr.ut_name && !strcmp(usr.ut_line, p)) {
+				output(&usr);
+				return;
+			}
+		/* well, at least we know what the tty is */
+		(void)strncpy(usr.ut_line, p, UT_LINESIZE);
+	} else
+		(void)strcpy(usr.ut_line, "tty??");
+
+	pw = getpwuid(getuid());
+	(void)strncpy(usr.ut_name, pw ? pw->pw_name : "?", UT_NAMESIZE);
+	(void)time(&usr.ut_time);
+	*usr.ut_host = '\0';
+	output(&usr);
+}
+
+void
+output(up)
+	struct utmp *up;
+{
+	struct stat sb;
+	char line[sizeof (up->ut_line) + 1];
+	char state;
+	static time_t now = 0;
+	time_t idle;
+
+	if (show_term || show_idle) {
+		if (now == 0)
+			time(&now);
+		
+		strncpy (line, up->ut_line, sizeof (up->ut_line));
+		line[sizeof (up->ut_line)] = '\0';
+
+		if (stat(line, &sb) == 0) {
+			state = (sb.st_mode & 020) ? '+' : '-';
+			idle = now - sb.st_atime;
+		} else {
+			state = '?';
+			idle = 0;
+		}
+		
+	}
+
+	(void)printf("%-*.*s ", UT_NAMESIZE, UT_NAMESIZE, up->ut_name);
+
+	if (show_term) {
+		(void)printf("%c ", state);
+	}
+
+	(void)printf("%-*.*s ", UT_LINESIZE, UT_LINESIZE, up->ut_line);
+	(void)printf("%.12s ", ctime(&up->ut_time) + 4);
+
+	if (show_idle) {
+		if (idle < 60) 
+			(void)printf("  .   ");
+		else if (idle < (24 * 60 * 60))
+			(void)printf("%02d:%02d ", 
+				     (idle / (60 * 60)),
+				     (idle % (60 * 60)) / 60);
+		else
+			(void)printf(" old  ");
+	}
+	
+	if (*up->ut_host)
+		printf("\t(%.*s)", UT_HOSTSIZE, up->ut_host);
+	(void)putchar('\n');
+}
+
+FILE *
+file(name)
+	char *name;
+{
+	FILE *ufp;
+
+	if (!(ufp = fopen(name, "r"))) {
+		err(1, "%s", name);
+		/* NOTREACHED */
+	}
+	return(ufp);
+}
+
+void
+usage()
+{
+	(void)fprintf(stderr, "usage: who [-mTu] [ file ]\n       who am i\n");
+	exit(1);
+}