GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: libexec/rpc.rusersd/rusersd.c Lines: 0 51 0.0 %
Date: 2017-11-13 Branches: 0 18 0.0 %

Line Branch Exec Source
1
/*	$OpenBSD: rusersd.c,v 1.19 2016/09/04 15:03:13 jca Exp $	*/
2
3
/*-
4
 *  Copyright (c) 1993 John Brezak
5
 *  All rights reserved.
6
 *
7
 *  Redistribution and use in source and binary forms, with or without
8
 *  modification, are permitted provided that the following conditions
9
 *  are met:
10
 *  1. Redistributions of source code must retain the above copyright
11
 *     notice, this list of conditions and the following disclaimer.
12
 *  2. Redistributions in binary form must reproduce the above copyright
13
 *     notice, this list of conditions and the following disclaimer in the
14
 *     documentation and/or other materials provided with the distribution.
15
 *  3. The name of the author may not be used to endorse or promote products
16
 *     derived from this software without specific prior written permission.
17
 *
18
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR `AS IS'' AND ANY EXPRESS OR
19
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
20
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
21
 * DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
22
 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
23
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
24
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
26
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
27
 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
28
 * POSSIBILITY OF SUCH DAMAGE.
29
 */
30
31
#include <sys/types.h>
32
#include <sys/socket.h>
33
#include <sys/file.h>
34
#include <stdio.h>
35
#include <signal.h>
36
#include <unistd.h>
37
#include <stdlib.h>
38
#include <pwd.h>
39
#include <syslog.h>
40
#include <rpc/rpc.h>
41
#include <rpcsvc/rusers.h>	/* New version */
42
#include <rpcsvc/rnusers.h>	/* Old version */
43
#include <rpc/pmap_clnt.h>
44
#include <utmp.h>
45
46
extern void rusers_service(struct svc_req *, SVCXPRT *);
47
48
int from_inetd = 1;
49
int utmp_fd;
50
51
/* ARGSUSED */
52
static void
53
cleanup(int signo)
54
{
55
	(void) pmap_unset(RUSERSPROG, RUSERSVERS_3);	/* XXX signal races */
56
	(void) pmap_unset(RUSERSPROG, RUSERSVERS_IDLE);
57
	(void) pmap_unset(RUSERSPROG, RUSERSVERS_ORIG);
58
	_exit(0);
59
}
60
61
int
62
main(int argc, char *argv[])
63
{
64
	int sock = 0, proto = 0;
65
	socklen_t fromlen;
66
	struct sockaddr_storage from;
67
	struct passwd *pw;
68
	SVCXPRT *transp;
69
70
	if ((utmp_fd = open(_PATH_UTMP, O_RDONLY)) == -1) {
71
		syslog(LOG_ERR, "cannot open %s", _PATH_UTMP);
72
		exit(1);
73
	}
74
75
	openlog("rpc.rusersd", LOG_NDELAY|LOG_CONS|LOG_PID, LOG_DAEMON);
76
77
	pw = getpwnam("_rusersd");
78
	if (!pw) {
79
		syslog(LOG_ERR, "no such user _rusersd");
80
		exit(1);
81
	}
82
	if (chroot("/var/empty") == -1) {
83
		syslog(LOG_ERR, "cannot chdir to /var/empty.");
84
		exit(1);
85
	}
86
	chdir("/");
87
88
	setgroups(1, &pw->pw_gid);
89
	setresgid(pw->pw_gid, pw->pw_gid, pw->pw_gid);
90
	setresuid(pw->pw_uid, pw->pw_uid, pw->pw_uid);
91
92
	/*
93
	 * See if inetd started us
94
	 */
95
	fromlen = sizeof(from);
96
	if (getsockname(0, (struct sockaddr *)&from, &fromlen) < 0) {
97
		from_inetd = 0;
98
		sock = RPC_ANYSOCK;
99
		proto = IPPROTO_UDP;
100
	}
101
102
	if (!from_inetd) {
103
		daemon(0, 0);
104
105
		(void) pmap_unset(RUSERSPROG, RUSERSVERS_3);
106
		(void) pmap_unset(RUSERSPROG, RUSERSVERS_IDLE);
107
		(void) pmap_unset(RUSERSPROG, RUSERSVERS_ORIG);
108
109
		(void) signal(SIGINT, cleanup);
110
		(void) signal(SIGTERM, cleanup);
111
		(void) signal(SIGHUP, cleanup);
112
	}
113
114
	transp = svcudp_create(sock);
115
	if (transp == NULL) {
116
		syslog(LOG_ERR, "cannot create udp service.");
117
		exit(1);
118
	}
119
	if (!svc_register(transp, RUSERSPROG, RUSERSVERS_3, rusers_service, proto)) {
120
		syslog(LOG_ERR,
121
		    "unable to register (RUSERSPROG, RUSERSVERS_3, %s).",
122
		    proto ? "udp" : "(inetd)");
123
		exit(1);
124
	}
125
	if (!svc_register(transp, RUSERSPROG, RUSERSVERS_IDLE, rusers_service, proto)) {
126
		syslog(LOG_ERR,
127
		    "unable to register (RUSERSPROG, RUSERSVERS_IDLE, %s).",
128
		    proto ? "udp" : "(inetd)");
129
		exit(1);
130
	}
131
	if (!svc_register(transp, RUSERSPROG, RUSERSVERS_ORIG, rusers_service, proto)) {
132
		syslog(LOG_ERR,
133
		    "unable to register (RUSERSPROG, RUSERSVERS_ORIG, %s).",
134
		    proto ? "udp" : "(inetd)");
135
		exit(1);
136
	}
137
138
	svc_run();
139
	syslog(LOG_ERR, "svc_run returned");
140
	exit(1);
141
}