rwho.c revision 24360 
1/*
2 * Copyright (c) 1983, 1993
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.
32 */
33
34#ifndef lint
35static char copyright[] =
36"@(#) Copyright (c) 1983, 1993\n\
37	The Regents of the University of California.  All rights reserved.\n";
38#endif /* not lint */
39
40#ifndef lint
41static char sccsid[] = "@(#)rwho.c	8.1 (Berkeley) 6/6/93";
42#endif /* not lint */
43
44#include <sys/param.h>
45#include <sys/file.h>
46#include <protocols/rwhod.h>
47#include <dirent.h>
48#include <locale.h>
49#include <stdio.h>
50#include <string.h>
51#include <time.h>
52#include <utmp.h>
53
54DIR	*dirp;
55
56struct	whod wd;
57int	utmpcmp();
58#define	NUSERS	1000
59struct	myutmp {
60	char    myhost[sizeof(wd.wd_hostname)];
61	int	myidle;
62	struct	outmp myutmp;
63} myutmp[NUSERS];
64int	nusers;
65
66#define	WHDRSIZE	(sizeof (wd) - sizeof (wd.wd_we))
67/*
68 * this macro should be shared with ruptime.
69 */
70#define	down(w,now)	((now) - (w)->wd_recvtime > 11 * 60)
71
72time_t	now;
73int	aflg;
74
75main(argc, argv)
76	int argc;
77	char **argv;
78{
79	extern char *optarg;
80	extern int optind;
81	int ch;
82	struct dirent *dp;
83	int cc, width;
84	register struct whod *w = &wd;
85	register struct whoent *we;
86	register struct myutmp *mp;
87	int f, n, i;
88
89	(void) setlocale(LC_TIME, "");
90
91	while ((ch = getopt(argc, argv, "a")) != -1)
92		switch((char)ch) {
93		case 'a':
94			aflg = 1;
95			break;
96		case '?':
97		default:
98			fprintf(stderr, "usage: rwho [-a]\n");
99			exit(1);
100		}
101	if (chdir(_PATH_RWHODIR) || (dirp = opendir(".")) == NULL) {
102		perror(_PATH_RWHODIR);
103		exit(1);
104	}
105	mp = myutmp;
106	(void)time(&now);
107	while (dp = readdir(dirp)) {
108		if (dp->d_ino == 0 || strncmp(dp->d_name, "whod.", 5))
109			continue;
110		f = open(dp->d_name, O_RDONLY);
111		if (f < 0)
112			continue;
113		cc = read(f, (char *)&wd, sizeof (struct whod));
114		if (cc < WHDRSIZE) {
115			(void) close(f);
116			continue;
117		}
118		if (down(w,now)) {
119			(void) close(f);
120			continue;
121		}
122		cc -= WHDRSIZE;
123		we = w->wd_we;
124		for (n = cc / sizeof (struct whoent); n > 0; n--) {
125			if (aflg == 0 && we->we_idle >= 60*60) {
126				we++;
127				continue;
128			}
129			if (nusers >= NUSERS) {
130				printf("too many users\n");
131				exit(1);
132			}
133			mp->myutmp = we->we_utmp; mp->myidle = we->we_idle;
134			(void) strcpy(mp->myhost, w->wd_hostname);
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		/* append one for the blank and use 8 for the out_line */
144		int j = strlen(mp->myhost) + 1 + sizeof(mp->myutmp.out_line);
145		if (j > width)
146			width = j;
147		mp++;
148	}
149	mp = myutmp;
150	for (i = 0; i < nusers; i++) {
151		char buf[BUFSIZ], cbuf[80];
152		strftime(cbuf, sizeof(cbuf), "%c", localtime((time_t *)&mp->myutmp.out_time));
153		(void)sprintf(buf, "%s:%-.*s", mp->myhost,
154		   sizeof(mp->myutmp.out_line), mp->myutmp.out_line);
155		printf("%-*.*s %-*s %.12s",
156		   UT_NAMESIZE, sizeof(mp->myutmp.out_name),
157		   mp->myutmp.out_name,
158		   width,
159		   buf,
160		   cbuf + 4);
161		mp->myidle /= 60;
162		if (mp->myidle) {
163			if (aflg) {
164				if (mp->myidle >= 100*60)
165					mp->myidle = 100*60 - 1;
166				if (mp->myidle >= 60)
167					printf(" %2d", mp->myidle / 60);
168				else
169					printf("   ");
170			} else
171				printf(" ");
172			printf(":%02d", mp->myidle % 60);
173		}
174		printf("\n");
175		mp++;
176	}
177	exit(0);
178}
179
180utmpcmp(u1, u2)
181	struct myutmp *u1, *u2;
182{
183	int rc;
184
185	rc = strncmp(u1->myutmp.out_name, u2->myutmp.out_name, sizeof(u2->myutmp.out_name));
186	if (rc)
187		return (rc);
188	rc = strcmp(u1->myhost, u2->myhost);
189	if (rc)
190		return (rc);
191	return (strncmp(u1->myutmp.out_line, u2->myutmp.out_line, sizeof(u2->myutmp.out_line)));
192}
193