xref: /illumos-gate/usr/src/cmd/cmd-inet/usr.bin/rwho.c (revision 7c478bd9)
1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License, Version 1.0 only
6  * (the "License").  You may not use this file except in compliance
7  * with the License.
8  *
9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10  * or http://www.opensolaris.org/os/licensing.
11  * See the License for the specific language governing permissions
12  * and limitations under the License.
13  *
14  * When distributing Covered Code, include this CDDL HEADER in each
15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16  * If applicable, add the following below this CDDL HEADER, with the
17  * fields enclosed by brackets "[]" replaced with your own identifying
18  * information: Portions Copyright [yyyy] [name of copyright owner]
19  *
20  * CDDL HEADER END
21  */
22 /*
23  * Copyright 2002 Sun Microsystems, Inc.  All rights reserved.
24  * Use is subject to license terms.
25  */
26 
27 /*	Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T	*/
28 /*	  All Rights Reserved  	*/
29 
30 /*
31  * University Copyright- Copyright (c) 1982, 1986, 1988
32  * The Regents of the University of California
33  * All Rights Reserved
34  *
35  * University Acknowledgment- Portions of this document are derived from
36  * software developed by the University of California, Berkeley, and its
37  * contributors.
38  */
39 
40 #pragma ident	"%Z%%M%	%I%	%E% SMI"
41 
42 #include <sys/param.h>
43 
44 #include <dirent.h>
45 #include <fcntl.h>
46 #include <stdio.h>
47 #include <stdlib.h>
48 #include <strings.h>
49 #include <time.h>
50 #include <unistd.h>
51 
52 #include <protocols/rwhod.h>
53 
54 static	DIR *dirp;
55 
56 static	struct whod wd;
57 #define	NUSERS	1000
58 static	struct myutmp {
59 	char	myhost[32];
60 	int	myidle;
61 	struct	outmp myutmp;
62 } myutmp[NUSERS];
63 static	int utmpcmp(const void *, const void *);
64 static	int nusers;
65 
66 #define	WHDRSIZE	(sizeof (wd) - sizeof (wd.wd_we))
67 #define	RWHODIR		"/var/spool/rwho"
68 /*
69  * this macro should be shared with ruptime.
70  */
71 #define	down(w, now)	((now) - (w)->wd_recvtime > 11 * 60)
72 
73 static	time_t now;
74 static	int aflg = 0;
75 
76 int
main(int argc,char ** argv)77 main(int argc, char **argv)
78 {
79 	struct dirent *dp;
80 	int cc, width;
81 	register struct whod *w = &wd;
82 	register struct whoent *we;
83 	register struct myutmp *mp;
84 	int f, n, i;
85 
86 	argc--, argv++;
87 again:
88 	if (argc > 0 && strcmp(argv[0], "-a") == 0) {
89 		argc--, argv++;
90 		aflg++;
91 		goto again;
92 	}
93 	(void) time(&now);
94 	if (chdir(RWHODIR) < 0) {
95 		perror(RWHODIR);
96 		return (EXIT_FAILURE);
97 	}
98 	dirp = opendir(".");
99 	if (dirp == NULL) {
100 		perror(RWHODIR);
101 		return (EXIT_FAILURE);
102 	}
103 	mp = myutmp;
104 	while (dp = readdir(dirp)) {
105 		if (dp->d_ino == 0)
106 			continue;
107 		if (strncmp(dp->d_name, "whod.", 5))
108 			continue;
109 		f = open(dp->d_name, 0);
110 		if (f < 0)
111 			continue;
112 		cc = read(f, (char *)&wd, sizeof (struct whod));
113 		if (cc < WHDRSIZE) {
114 			(void) close(f);
115 			continue;
116 		}
117 		if (down(w, now)) {
118 			(void) close(f);
119 			continue;
120 		}
121 		cc -= WHDRSIZE;
122 		we = w->wd_we;
123 		for (n = cc / sizeof (struct whoent); n > 0; n--) {
124 			if (aflg == 0 && we->we_idle >= 60*60) {
125 				we++;
126 				continue;
127 			}
128 			if (nusers >= NUSERS) {
129 				(void) printf("too many users\n");
130 				return (EXIT_FAILURE);
131 			}
132 			mp->myutmp = we->we_utmp; mp->myidle = we->we_idle;
133 			(void) strncpy(mp->myhost, w->wd_hostname,
134 			    sizeof (mp->myhost));
135 			nusers++; we++; mp++;
136 		}
137 		(void) close(f);
138 	}
139 	qsort((char *)myutmp, nusers, sizeof (struct myutmp), utmpcmp);
140 	mp = myutmp;
141 	width = 0;
142 	for (i = 0; i < nusers; i++) {
143 		int j = strlen(mp->myhost) + 1 + strlen(mp->myutmp.out_line);
144 		if (j > width)
145 			width = j;
146 		mp++;
147 	}
148 	mp = myutmp;
149 	for (i = 0; i < nusers; i++) {
150 		char buf[BUFSIZ];
151 		(void) snprintf(buf, BUFSIZ, "%.*s:%.*s",
152 		    sizeof (mp->myhost), mp->myhost,
153 		    sizeof (mp->myutmp.out_line), mp->myutmp.out_line);
154 		(void) printf("%-8.*s %-*s %.12s",
155 		    sizeof (mp->myutmp.out_name), mp->myutmp.out_name,
156 		    width, buf,
157 		    ctime((time_t *)&mp->myutmp.out_time) + 4);
158 		mp->myidle /= 60;
159 		if (mp->myidle) {
160 			if (aflg) {
161 				if (mp->myidle >= 100*60)
162 					mp->myidle = 100*60 - 1;
163 				if (mp->myidle >= 60)
164 					(void) printf(" %2d", mp->myidle / 60);
165 				else
166 					(void) fputs("   ", stdout);
167 			} else
168 				(void) printf(" ");
169 			(void) printf(":%02d", mp->myidle % 60);
170 		}
171 		(void) puts("");
172 		mp++;
173 	}
174 	return (EXIT_SUCCESS);
175 }
176 
177 static int
utmpcmp(const void * p1,const void * p2)178 utmpcmp(const void *p1, const void *p2)
179 {
180 	const struct myutmp *u1 = p1, *u2 = p2;
181 	int rc;
182 
183 	rc = strncmp(u1->myutmp.out_name, u2->myutmp.out_name,
184 	    sizeof (u1->myutmp.out_name));
185 	if (rc != 0)
186 		return (rc);
187 	rc = strncmp(u1->myhost, u2->myhost, sizeof (u1->myhost));
188 	if (rc != 0)
189 		return (rc);
190 	return (strncmp(u1->myutmp.out_line, u2->myutmp.out_line,
191 	    sizeof (u1->myutmp.out_line)));
192 }
193