[apple/network_cmds.git] / uucpd.tproj / uucpd.c

/*
 * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_LICENSE_HEADER_START@
 * 
 * "Portions Copyright (c) 1999 Apple Computer, Inc.  All Rights
 * Reserved.  This file contains Original Code and/or Modifications of
 * Original Code as defined in and that are subject to the Apple Public
 * Source License Version 1.0 (the 'License').  You may not use this file
 * except in compliance with the License.  Please obtain a copy of the
 * License at http://www.apple.com/publicsource and read it before using
 * this file.
 * 
 * The Original Code and all software distributed under the License are
 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
 * License for the specific language governing rights and limitations
 * under the License."
 * 
 * @APPLE_LICENSE_HEADER_END@
 */
/*
 * Copyright (c) 1985, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Rick Adams.
 *
 * 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) 1985, 1993\n\
	The Regents of the University of California.  All rights reserved.\n";
#endif /* not lint */

#ifndef lint
static char sccsid[] = "@(#)uucpd.c	8.1 (Berkeley) 6/4/93";
#endif /* not lint */

/*
 * 4.2BSD TCP/IP server for uucico
 * uucico's TCP channel causes this server to be run at the remote end.
 */

#include <sys/types.h>
#include <sys/wait.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <signal.h>
#include <fcntl.h>
#include <time.h>
#include <pwd.h>
#include <unistd.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "pathnames.h"

struct	sockaddr_in hisctladdr;
int hisaddrlen = sizeof hisctladdr;
struct	sockaddr_in myctladdr;
int mypid;

char Username[64];
char *nenv[] = {
	Username,
	NULL,
};
extern char **environ;

main(argc, argv)
int argc;
char **argv;
{
#ifndef BSDINETD
	register int s, tcp_socket;
	struct servent *sp;
#endif !BSDINETD
	extern int errno;
	int dologout();

	environ = nenv;
#ifdef BSDINETD
	close(1); close(2);
	dup(0); dup(0);
	hisaddrlen = sizeof (hisctladdr);
	if (getpeername(0, &hisctladdr, &hisaddrlen) < 0) {
		fprintf(stderr, "%s: ", argv[0]);
		perror("getpeername");
		_exit(1);
	}
	if (fork() == 0)
		doit(&hisctladdr);
	dologout();
	exit(1);
#else !BSDINETD
	sp = getservbyname("uucp", "tcp");
	if (sp == NULL){
		perror("uucpd: getservbyname");
		exit(1);
	}
	if (fork())
		exit(0);
	if ((s=open(_PATH_TTY, 2)) >= 0){
		ioctl(s, TIOCNOTTY, (char *)0);
		close(s);
	}

	bzero((char *)&myctladdr, sizeof (myctladdr));
	myctladdr.sin_family = AF_INET;
	myctladdr.sin_port = sp->s_port;
#ifdef BSD4_2
	tcp_socket = socket(AF_INET, SOCK_STREAM, 0);
	if (tcp_socket < 0) {
		perror("uucpd: socket");
		exit(1);
	}
	if (bind(tcp_socket, (char *)&myctladdr, sizeof (myctladdr)) < 0) {
		perror("uucpd: bind");
		exit(1);
	}
	listen(tcp_socket, 3);	/* at most 3 simultaneuos uucp connections */
	signal(SIGCHLD, dologout);

	for(;;) {
		s = accept(tcp_socket, &hisctladdr, &hisaddrlen);
		if (s < 0){
			if (errno == EINTR) 
				continue;
			perror("uucpd: accept");
			exit(1);
		}
		if (fork() == 0) {
			close(0); close(1); close(2);
			dup(s); dup(s); dup(s);
			close(tcp_socket); close(s);
			doit(&hisctladdr);
			exit(1);
		}
		close(s);
	}
#endif BSD4_2

#endif	!BSDINETD
}

doit(sinp)
struct sockaddr_in *sinp;
{
	char user[64], passwd[64];
	char *xpasswd, *crypt();
	struct passwd *pw, *getpwnam();

	alarm(60);
	printf("login: "); fflush(stdout);
	if (readline(user, sizeof user) < 0) {
		fprintf(stderr, "user read\n");
		return;
	}
	/* truncate username to 8 characters */
	user[8] = '\0';
	pw = getpwnam(user);
	if (pw == NULL) {
		fprintf(stderr, "user unknown\n");
		return;
	}
	if (strcmp(pw->pw_shell, _PATH_UUCICO)) {
		fprintf(stderr, "Login incorrect.");
		return;
	}
	if (pw->pw_passwd && *pw->pw_passwd != '\0') {
		printf("Password: "); fflush(stdout);
		if (readline(passwd, sizeof passwd) < 0) {
			fprintf(stderr, "passwd read\n");
			return;
		}
		xpasswd = crypt(passwd, pw->pw_passwd);
		if (strcmp(xpasswd, pw->pw_passwd)) {
			fprintf(stderr, "Login incorrect.");
			return;
		}
	}
	alarm(0);
	sprintf(Username, "USER=%s", user);
	dologin(pw, sinp);
	setgid(pw->pw_gid);
#ifdef BSD4_2
	initgroups(pw->pw_name, pw->pw_gid);
#endif BSD4_2
	chdir(pw->pw_dir);
	setuid(pw->pw_uid);
#ifdef BSD4_2
	execl(UUCICO, "uucico", (char *)0);
#endif BSD4_2
	perror("uucico server: execl");
}

readline(p, n)
register char *p;
register int n;
{
	char c;

	while (n-- > 0) {
		if (read(0, &c, 1) <= 0)
			return(-1);
		c &= 0177;
		if (c == '\n' || c == '\r') {
			*p = '\0';
			return(0);
		}
		*p++ = c;
	}
	return(-1);
}

#include <utmp.h>
#ifdef BSD4_2
#include <fcntl.h>
#endif BSD4_2

#define	SCPYN(a, b)	strncpy(a, b, sizeof (a))

struct	utmp utmp;

dologout()
{
	union wait status;
	int pid, wtmp;

#ifdef BSDINETD
	while ((pid=wait((int *)&status)) > 0) {
#else  !BSDINETD
	while ((pid=wait3((int *)&status,WNOHANG,0)) > 0) {
#endif !BSDINETD
		wtmp = open(_PATH_WTMP, O_WRONLY|O_APPEND);
		if (wtmp >= 0) {
			sprintf(utmp.ut_line, "uucp%.4d", pid);
			SCPYN(utmp.ut_name, "");
			SCPYN(utmp.ut_host, "");
			(void) time(&utmp.ut_time);
			(void) write(wtmp, (char *)&utmp, sizeof (utmp));
			(void) close(wtmp);
		}
	}
}

/*
 * Record login in wtmp file.
 */
dologin(pw, sin)
struct passwd *pw;
struct sockaddr_in *sin;
{
	char line[32];
	char remotehost[32];
	int wtmp, f;
	struct hostent *hp = gethostbyaddr((char *)&sin->sin_addr,
		sizeof (struct in_addr), AF_INET);

	if (hp) {
		strncpy(remotehost, hp->h_name, sizeof (remotehost));
		endhostent();
	} else
		strncpy(remotehost, inet_ntoa(sin->sin_addr),
		    sizeof (remotehost));
	wtmp = open(_PATH_WTMP, O_WRONLY|O_APPEND);
	if (wtmp >= 0) {
		/* hack, but must be unique and no tty line */
		sprintf(line, "uucp%.4d", getpid());
		SCPYN(utmp.ut_line, line);
		SCPYN(utmp.ut_name, pw->pw_name);
		SCPYN(utmp.ut_host, remotehost);
		time(&utmp.ut_time);
		(void) write(wtmp, (char *)&utmp, sizeof (utmp));
		(void) close(wtmp);
	}
	if ((f = open(_PATH_LASTLOG, O_RDWR)) >= 0) {
		struct lastlog ll;

		time(&ll.ll_time);
		lseek(f, (long)pw->pw_uid * sizeof(struct lastlog), 0);
		strcpy(line, remotehost);
		SCPYN(ll.ll_line, line);
		SCPYN(ll.ll_host, remotehost);
		(void) write(f, (char *) &ll, sizeof ll);
		(void) close(f);
	}
}
Commit	Line	Data
b7080c8e A	1	/*
	2	* Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
	3	*
	4	* @APPLE_LICENSE_HEADER_START@
	5	*
	6	* "Portions Copyright (c) 1999 Apple Computer, Inc. All Rights
	7	* Reserved. This file contains Original Code and/or Modifications of
	8	* Original Code as defined in and that are subject to the Apple Public
	9	* Source License Version 1.0 (the 'License'). You may not use this file
	10	* except in compliance with the License. Please obtain a copy of the
	11	* License at http://www.apple.com/publicsource and read it before using
	12	* this file.
	13	*
	14	* The Original Code and all software distributed under the License are
	15	* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
	16	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
	17	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
	18	* FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
	19	* License for the specific language governing rights and limitations
	20	* under the License."
	21	*
	22	* @APPLE_LICENSE_HEADER_END@
	23	*/
	24	/*
	25	* Copyright (c) 1985, 1993
	26	* The Regents of the University of California. All rights reserved.
	27	*
	28	* This code is derived from software contributed to Berkeley by
	29	* Rick Adams.
	30	*
	31	* Redistribution and use in source and binary forms, with or without
	32	* modification, are permitted provided that the following conditions
	33	* are met:
	34	* 1. Redistributions of source code must retain the above copyright
	35	* notice, this list of conditions and the following disclaimer.
	36	* 2. Redistributions in binary form must reproduce the above copyright
	37	* notice, this list of conditions and the following disclaimer in the
	38	* documentation and/or other materials provided with the distribution.
	39	* 3. All advertising materials mentioning features or use of this software
	40	* must display the following acknowledgement:
	41	* This product includes software developed by the University of
	42	* California, Berkeley and its contributors.
	43	* 4. Neither the name of the University nor the names of its contributors
	44	* may be used to endorse or promote products derived from this software
	45	* without specific prior written permission.
	46	*
	47	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	48	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	49	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	50	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	51	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	52	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	53	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	54	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	55	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	56	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	57	* SUCH DAMAGE.
	58	*/
	59
	60	#ifndef lint
	61	static char copyright[] =
	62	"@(#) Copyright (c) 1985, 1993\n\
	63	The Regents of the University of California. All rights reserved.\n";
	64	#endif /* not lint */
65
66	#ifndef lint
67	static char sccsid[] = "@(#)uucpd.c 8.1 (Berkeley) 6/4/93";
68	#endif /* not lint */
69
70	/*
71	* 4.2BSD TCP/IP server for uucico
72	* uucico's TCP channel causes this server to be run at the remote end.
73	*/
74
75	#include <sys/types.h>
76	#include <sys/wait.h>
77	#include <sys/ioctl.h>
78	#include <sys/socket.h>
79	#include <netinet/in.h>
80	#include <arpa/inet.h>
81	#include <netdb.h>
82	#include <signal.h>
83	#include <fcntl.h>
84	#include <time.h>
85	#include <pwd.h>
86	#include <unistd.h>
87	#include <errno.h>
88	#include <stdio.h>
89	#include <stdlib.h>
90	#include <string.h>
91	#include "pathnames.h"
92
93	struct sockaddr_in hisctladdr;
94	int hisaddrlen = sizeof hisctladdr;
95	struct sockaddr_in myctladdr;
96	int mypid;
97
98	char Username[64];
99	char *nenv[] = {
100	Username,
101	NULL,
102	};
103	extern char **environ;
104
105	main(argc, argv)
106	int argc;
107	char **argv;
108	{
109	#ifndef BSDINETD
110	register int s, tcp_socket;
111	struct servent *sp;
112	#endif !BSDINETD
113	extern int errno;
114	int dologout();
115
116	environ = nenv;
117	#ifdef BSDINETD
118	close(1); close(2);
119	dup(0); dup(0);
120	hisaddrlen = sizeof (hisctladdr);
121	if (getpeername(0, &hisctladdr, &hisaddrlen) < 0) {
122	fprintf(stderr, "%s: ", argv[0]);
123	perror("getpeername");
124	_exit(1);
125	}
126	if (fork() == 0)
127	doit(&hisctladdr);
128	dologout();
129	exit(1);
130	#else !BSDINETD
131	sp = getservbyname("uucp", "tcp");
132	if (sp == NULL){
133	perror("uucpd: getservbyname");
134	exit(1);
135	}
136	if (fork())
137	exit(0);
138	if ((s=open(_PATH_TTY, 2)) >= 0){
139	ioctl(s, TIOCNOTTY, (char *)0);
140	close(s);
141	}
142
143	bzero((char *)&myctladdr, sizeof (myctladdr));
144	myctladdr.sin_family = AF_INET;
145	myctladdr.sin_port = sp->s_port;
146	#ifdef BSD4_2
147	tcp_socket = socket(AF_INET, SOCK_STREAM, 0);
148	if (tcp_socket < 0) {
149	perror("uucpd: socket");
150	exit(1);
151	}
152	if (bind(tcp_socket, (char *)&myctladdr, sizeof (myctladdr)) < 0) {
153	perror("uucpd: bind");
154	exit(1);
155	}
156	listen(tcp_socket, 3); /* at most 3 simultaneuos uucp connections */
157	signal(SIGCHLD, dologout);
158
159	for(;;) {
160	s = accept(tcp_socket, &hisctladdr, &hisaddrlen);
161	if (s < 0){
162	if (errno == EINTR)
163	continue;
164	perror("uucpd: accept");
165	exit(1);
166	}
167	if (fork() == 0) {
168	close(0); close(1); close(2);
169	dup(s); dup(s); dup(s);
170	close(tcp_socket); close(s);
171	doit(&hisctladdr);
172	exit(1);
173	}
174	close(s);
175	}
176	#endif BSD4_2
177
178	#endif !BSDINETD
179	}
180
181	doit(sinp)
182	struct sockaddr_in *sinp;
183	{
184	char user[64], passwd[64];
185	char xpasswd, crypt();
186	struct passwd pw, getpwnam();
187
188	alarm(60);
189	printf("login: "); fflush(stdout);
190	if (readline(user, sizeof user) < 0) {
191	fprintf(stderr, "user read\n");
192	return;
193	}
194	/* truncate username to 8 characters */
195	user[8] = '\0';
196	pw = getpwnam(user);
197	if (pw == NULL) {
198	fprintf(stderr, "user unknown\n");
199	return;
200	}
201	if (strcmp(pw->pw_shell, _PATH_UUCICO)) {
202	fprintf(stderr, "Login incorrect.");
203	return;
204	}
205	if (pw->pw_passwd && *pw->pw_passwd != '\0') {
206	printf("Password: "); fflush(stdout);
207	if (readline(passwd, sizeof passwd) < 0) {
208	fprintf(stderr, "passwd read\n");
209	return;
210	}
211	xpasswd = crypt(passwd, pw->pw_passwd);
212	if (strcmp(xpasswd, pw->pw_passwd)) {
213	fprintf(stderr, "Login incorrect.");
214	return;
215	}
216	}
217	alarm(0);
218	sprintf(Username, "USER=%s", user);
219	dologin(pw, sinp);
220	setgid(pw->pw_gid);
221	#ifdef BSD4_2
222	initgroups(pw->pw_name, pw->pw_gid);
223	#endif BSD4_2
224	chdir(pw->pw_dir);
225	setuid(pw->pw_uid);
226	#ifdef BSD4_2
227	execl(UUCICO, "uucico", (char *)0);
228	#endif BSD4_2
229	perror("uucico server: execl");
230	}
231
232	readline(p, n)
233	register char *p;
234	register int n;
235	{
236	char c;
237
238	while (n-- > 0) {
239	if (read(0, &c, 1) <= 0)
240	return(-1);
241	c &= 0177;
242	if (c == '\n' \|\| c == '\r') {
243	*p = '\0';
244	return(0);
245	}
246	*p++ = c;
247	}
248	return(-1);
249	}
250
251	#include <utmp.h>
252	#ifdef BSD4_2
253	#include <fcntl.h>
254	#endif BSD4_2
255
256	#define SCPYN(a, b) strncpy(a, b, sizeof (a))
257
258	struct utmp utmp;
259
260	dologout()
261	{
262	union wait status;
263	int pid, wtmp;
264
265	#ifdef BSDINETD
266	while ((pid=wait((int *)&status)) > 0) {
267	#else !BSDINETD
268	while ((pid=wait3((int *)&status,WNOHANG,0)) > 0) {
269	#endif !BSDINETD
270	wtmp = open(_PATH_WTMP, O_WRONLY\|O_APPEND);
271	if (wtmp >= 0) {
272	sprintf(utmp.ut_line, "uucp%.4d", pid);
273	SCPYN(utmp.ut_name, "");
274	SCPYN(utmp.ut_host, "");
275	(void) time(&utmp.ut_time);
276	(void) write(wtmp, (char *)&utmp, sizeof (utmp));
277	(void) close(wtmp);
278	}
279	}
280	}
281
282	/*
283	* Record login in wtmp file.
284	*/
285	dologin(pw, sin)
286	struct passwd *pw;
287	struct sockaddr_in *sin;
288	{
289	char line[32];
290	char remotehost[32];
291	int wtmp, f;
292	struct hostent hp = gethostbyaddr((char )&sin->sin_addr,
293	sizeof (struct in_addr), AF_INET);
294
295	if (hp) {
296	strncpy(remotehost, hp->h_name, sizeof (remotehost));
297	endhostent();
298	} else
299	strncpy(remotehost, inet_ntoa(sin->sin_addr),
300	sizeof (remotehost));
301	wtmp = open(_PATH_WTMP, O_WRONLY\|O_APPEND);
302	if (wtmp >= 0) {
303	/* hack, but must be unique and no tty line */
304	sprintf(line, "uucp%.4d", getpid());
305	SCPYN(utmp.ut_line, line);
306	SCPYN(utmp.ut_name, pw->pw_name);
307	SCPYN(utmp.ut_host, remotehost);
308	time(&utmp.ut_time);
309	(void) write(wtmp, (char *)&utmp, sizeof (utmp));
310	(void) close(wtmp);
311	}
312	if ((f = open(_PATH_LASTLOG, O_RDWR)) >= 0) {
313	struct lastlog ll;
314
315	time(&ll.ll_time);
316	lseek(f, (long)pw->pw_uid * sizeof(struct lastlog), 0);
317	strcpy(line, remotehost);
318	SCPYN(ll.ll_line, line);
319	SCPYN(ll.ll_host, remotehost);
320	(void) write(f, (char *) &ll, sizeof ll);
321	(void) close(f);
322	}
323	}