2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (c) 1983, 1993 The Regents of the University of California.
5 * Copyright (c) 2013 Mariusz Zaborski <oshogbo@FreeBSD.org>
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of the University nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 static const char copyright[] =
35 "@(#) Copyright (c) 1983, 1993\n\
36 The Regents of the University of California. All rights reserved.\n";
41 static char sccsid[] = "@(#)rwho.c 8.1 (Berkeley) 6/6/93";
45 #include <sys/cdefs.h>
46 __FBSDID("$FreeBSD$");
48 #include <sys/capsicum.h>
49 #include <sys/param.h>
52 #include <protocols/rwhod.h>
54 #include <capsicum_helpers.h>
68 #define WHDRSIZE (ssize_t)(sizeof(wd) - sizeof(wd.wd_we))
70 * this macro should be shared with ruptime.
72 #define down(w,now) ((now) - (w)->wd_recvtime > 11 * 60)
75 static struct whod wd;
77 static struct myutmp {
78 char myhost[sizeof(wd.wd_hostname)];
86 static void usage(void);
87 static int utmpcmp(const void *, const void *);
90 main(int argc, char *argv[])
106 (void) setlocale(LC_TIME, "");
107 d_first = (*nl_langinfo(D_MD_ORDER) == 'd');
109 while ((ch = getopt(argc, argv, "a")) != -1) {
125 if (chdir(_PATH_RWHODIR) < 0)
126 err(1, "chdir(%s)", _PATH_RWHODIR);
127 if ((dirp = opendir(".")) == NULL)
128 err(1, "opendir(%s)", _PATH_RWHODIR);
131 cap_rights_init(&rights, CAP_READ, CAP_LOOKUP);
132 if (caph_rights_limit(dfd, &rights) < 0)
133 err(1, "cap_rights_limit failed: %s", _PATH_RWHODIR);
135 * Cache files required for time(3) and localtime(3) before entering
139 (void) localtime(&ct);
140 if (caph_enter() < 0)
143 cap_rights_init(&rights, CAP_READ);
144 while ((dp = readdir(dirp)) != NULL) {
145 if (dp->d_ino == 0 || strncmp(dp->d_name, "whod.", 5) != 0)
147 f = openat(dfd, dp->d_name, O_RDONLY);
150 if (caph_rights_limit(f, &rights) < 0)
151 err(1, "cap_rights_limit failed: %s", dp->d_name);
152 cc = read(f, (char *)&wd, sizeof(struct whod));
157 if (down(w, now) != 0) {
163 for (n = cc / sizeof(struct whoent); n > 0; n--) {
164 if (aflg == 0 && we->we_idle >= 60 * 60) {
168 if (nusers >= NUSERS)
169 errx(1, "too many users");
170 mp->myutmp = we->we_utmp;
171 mp->myidle = we->we_idle;
172 (void) strcpy(mp->myhost, w->wd_hostname);
179 qsort((char *)myutmp, nusers, sizeof(struct myutmp), utmpcmp);
182 for (i = 0; i < nusers; i++) {
183 /* append one for the blank and use 8 for the out_line */
186 j = strlen(mp->myhost) + 1 + sizeof(mp->myutmp.out_line);
192 for (i = 0; i < nusers; i++) {
193 char buf[BUFSIZ], cbuf[80];
196 t = _int_to_time(mp->myutmp.out_time);
197 strftime(cbuf, sizeof(cbuf), d_first ? "%e %b %R" : "%b %e %R",
199 (void) sprintf(buf, "%s:%-.*s", mp->myhost,
200 (int)sizeof(mp->myutmp.out_line), mp->myutmp.out_line);
201 printf("%-*.*s %-*s %s",
202 (int)sizeof(mp->myutmp.out_name),
203 (int)sizeof(mp->myutmp.out_name),
204 mp->myutmp.out_name, width, buf, cbuf);
206 if (mp->myidle != 0) {
208 if (mp->myidle >= 100 * 60)
209 mp->myidle = 100 * 60 - 1;
210 if (mp->myidle >= 60)
211 printf(" %2d", mp->myidle / 60);
217 printf(":%02d", mp->myidle % 60);
230 fprintf(stderr, "usage: rwho [-a]\n");
234 #define MYUTMP(a) ((const struct myutmp *)(a))
237 utmpcmp(const void *u1, const void *u2)
241 rc = strncmp(MYUTMP(u1)->myutmp.out_name, MYUTMP(u2)->myutmp.out_name,
242 sizeof(MYUTMP(u2)->myutmp.out_name));
245 rc = strcmp(MYUTMP(u1)->myhost, MYUTMP(u2)->myhost);
248 return (strncmp(MYUTMP(u1)->myutmp.out_line,
249 MYUTMP(u2)->myutmp.out_line, sizeof(MYUTMP(u2)->myutmp.out_line)));