[apple/network_cmds.git] / rexecd.tproj / rexecd.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) 1983, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * 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) 1983, 1993\n\
	The Regents of the University of California.  All rights reserved.\n";
#endif /* not lint */

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

#include <sys/param.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <sys/time.h>

#include <netinet/in.h>

#include <errno.h>
#include <netdb.h>
#include <paths.h>
#include <pwd.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

/*VARARGS1*/
int error();

/*
 * remote execute server:
 *	username\0
 *	password\0
 *	command\0
 *	data
 */
/*ARGSUSED*/
main(argc, argv)
	int argc;
	char **argv;
{
	struct sockaddr_in from;
	int fromlen;

	fromlen = sizeof (from);
	if (getpeername(0, (struct sockaddr *)&from, &fromlen) < 0) {
		(void)fprintf(stderr,
		    "rexecd: getpeername: %s\n", strerror(errno));
		exit(1);
	}
	doit(0, &from);
}

char	username[20] = "USER=";
char	homedir[64] = "HOME=";
char	shell[64] = "SHELL=";
char	path[sizeof(_PATH_DEFPATH) + sizeof("PATH=")] = "PATH=";
char	*envinit[] =
	    {homedir, shell, path, username, 0};
#ifdef __APPLE__
extern
#endif
char	**environ;

struct	sockaddr_in asin = { AF_INET };

doit(f, fromp)
	int f;
	struct sockaddr_in *fromp;
{
	char cmdbuf[NCARGS+1], *cp, *namep;
	char user[16], pass[16];
	struct passwd *pwd;
	int s;
	u_short port;
	int pv[2], pid, ready, readfrom, cc;
	char buf[BUFSIZ], sig;
	int one = 1;

	(void) signal(SIGINT, SIG_DFL);
	(void) signal(SIGQUIT, SIG_DFL);
	(void) signal(SIGTERM, SIG_DFL);
#ifdef DEBUG
	{ int t = open(_PATH_TTY, 2);
	  if (t >= 0) {
		ioctl(t, TIOCNOTTY, (char *)0);
		(void) close(t);
	  }
	}
#endif
	dup2(f, 0);
	dup2(f, 1);
	dup2(f, 2);
	(void) alarm(60);
	port = 0;
	for (;;) {
		char c;
		if (read(f, &c, 1) != 1)
			exit(1);
		if (c == 0)
			break;
		port = port * 10 + c - '0';
	}
	(void) alarm(0);
	if (port != 0) {
		s = socket(AF_INET, SOCK_STREAM, 0);
		if (s < 0)
			exit(1);
		if (bind(s, (struct sockaddr *)&asin, sizeof (asin)) < 0)
			exit(1);
		(void) alarm(60);
		fromp->sin_port = htons(port);
		if (connect(s, (struct sockaddr *)fromp, sizeof (*fromp)) < 0)
			exit(1);
		(void) alarm(0);
	}
	getstr(user, sizeof(user), "username");
	getstr(pass, sizeof(pass), "password");
	getstr(cmdbuf, sizeof(cmdbuf), "command");
	setpwent();
	pwd = getpwnam(user);
	if (pwd == NULL) {
		error("Login incorrect.\n");
		exit(1);
	}
	endpwent();
	if (*pwd->pw_passwd != '\0') {
		namep = crypt(pass, pwd->pw_passwd);
		if (strcmp(namep, pwd->pw_passwd)) {
			error("Password incorrect.\n");
			exit(1);
		}
	}
	if (chdir(pwd->pw_dir) < 0) {
		error("No remote directory.\n");
		exit(1);
	}
	(void) write(2, "\0", 1);
	if (port) {
		(void) pipe(pv);
		pid = fork();
		if (pid == -1)  {
			error("Try again.\n");
			exit(1);
		}
		if (pid) {
			(void) close(0); (void) close(1); (void) close(2);
			(void) close(f); (void) close(pv[1]);
			readfrom = (1<<s) | (1<<pv[0]);
			ioctl(pv[1], FIONBIO, (char *)&one);
			/* should set s nbio! */
			do {
				ready = readfrom;
				(void) select(16, (fd_set *)&ready,
				    (fd_set *)NULL, (fd_set *)NULL,
				    (struct timeval *)NULL);
				if (ready & (1<<s)) {
					if (read(s, &sig, 1) <= 0)
						readfrom &= ~(1<<s);
					else
						killpg(pid, sig);
				}
				if (ready & (1<<pv[0])) {
					cc = read(pv[0], buf, sizeof (buf));
					if (cc <= 0) {
						shutdown(s, 1+1);
						readfrom &= ~(1<<pv[0]);
					} else
						(void) write(s, buf, cc);
				}
			} while (readfrom);
			exit(0);
		}
		setpgrp(0, getpid());
		(void) close(s); (void)close(pv[0]);
		dup2(pv[1], 2);
	}
	if (*pwd->pw_shell == '\0')
		pwd->pw_shell = _PATH_BSHELL;
	if (f > 2)
		(void) close(f);
	(void) setgid((gid_t)pwd->pw_gid);
	initgroups(pwd->pw_name, pwd->pw_gid);
	(void) setuid((uid_t)pwd->pw_uid);
	(void)strcat(path, _PATH_DEFPATH);
	environ = envinit;
	strncat(homedir, pwd->pw_dir, sizeof(homedir)-6);
	strncat(shell, pwd->pw_shell, sizeof(shell)-7);
	strncat(username, pwd->pw_name, sizeof(username)-6);
	cp = strrchr(pwd->pw_shell, '/');
	if (cp)
		cp++;
	else
		cp = pwd->pw_shell;
	execl(pwd->pw_shell, cp, "-c", cmdbuf, 0);
	perror(pwd->pw_shell);
	exit(1);
}

/*VARARGS1*/
error(fmt, a1, a2, a3)
	char *fmt;
	int a1, a2, a3;
{
	char buf[BUFSIZ];

	buf[0] = 1;
	(void) sprintf(buf+1, fmt, a1, a2, a3);
	(void) write(2, buf, strlen(buf));
}

getstr(buf, cnt, err)
	char *buf;
	int cnt;
	char *err;
{
	char c;

	do {
		if (read(0, &c, 1) != 1)
			exit(1);
		*buf++ = c;
		if (--cnt == 0) {
			error("%s too long\n", err);
			exit(1);
		}
	} while (c != 0);
}
Commit	Line	Data
b7080c8e A	1	/*
	2	* Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
	3	*
	4	* @APPLE_LICENSE_HEADER_START@
	5	*
921c0aec A	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.
b7080c8e A	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,
921c0aec A	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."
b7080c8e A	21	*
	22	* @APPLE_LICENSE_HEADER_END@
	23	*/
	24	/*
	25	* Copyright (c) 1983, 1993
	26	* The Regents of the University of California. All rights reserved.
	27	*
	28	* Redistribution and use in source and binary forms, with or without
	29	* modification, are permitted provided that the following conditions
	30	* are met:
	31	* 1. Redistributions of source code must retain the above copyright
	32	* notice, this list of conditions and the following disclaimer.
	33	* 2. Redistributions in binary form must reproduce the above copyright
	34	* notice, this list of conditions and the following disclaimer in the
	35	* documentation and/or other materials provided with the distribution.
	36	* 3. All advertising materials mentioning features or use of this software
	37	* must display the following acknowledgement:
	38	* This product includes software developed by the University of
	39	* California, Berkeley and its contributors.
	40	* 4. Neither the name of the University nor the names of its contributors
	41	* may be used to endorse or promote products derived from this software
	42	* without specific prior written permission.
	43	*
	44	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	45	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	46	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	47	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	48	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	49	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	50	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	51	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	52	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	53	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	54	* SUCH DAMAGE.
	55	*/
	56
	57	#ifndef lint
	58	static char copyright[] =
	59	"@(#) Copyright (c) 1983, 1993\n\
	60	The Regents of the University of California. All rights reserved.\n";
	61	#endif /* not lint */
	62
	63	#ifndef lint
	64	static char sccsid[] = "@(#)rexecd.c 8.1 (Berkeley) 6/4/93";
	65	#endif /* not lint */
	66
	67	#include <sys/param.h>
	68	#include <sys/ioctl.h>
	69	#include <sys/socket.h>
	70	#include <sys/time.h>
	71
	72	#include <netinet/in.h>
	73
	74	#include <errno.h>
	75	#include <netdb.h>
	76	#include <paths.h>
	77	#include <pwd.h>
	78	#include <signal.h>
	79	#include <stdio.h>
	80	#include <stdlib.h>
	81	#include <string.h>
	82	#include <unistd.h>
	83
	84	/VARARGS1/
85	int error();
86
87	/*
88	* remote execute server:
89	* username\0
90	* password\0
91	* command\0
92	* data
93	*/
94	/ARGSUSED/
95	main(argc, argv)
96	int argc;
97	char **argv;
98	{
99	struct sockaddr_in from;
100	int fromlen;
101
102	fromlen = sizeof (from);
103	if (getpeername(0, (struct sockaddr *)&from, &fromlen) < 0) {
104	(void)fprintf(stderr,
105	"rexecd: getpeername: %s\n", strerror(errno));
106	exit(1);
107	}
108	doit(0, &from);
109	}
110
111	char username[20] = "USER=";
112	char homedir[64] = "HOME=";
113	char shell[64] = "SHELL=";
114	char path[sizeof(_PATH_DEFPATH) + sizeof("PATH=")] = "PATH=";
115	char *envinit[] =
116	{homedir, shell, path, username, 0};
117	#ifdef __APPLE__
118	extern
119	#endif
120	char **environ;
121
122	struct sockaddr_in asin = { AF_INET };
123
124	doit(f, fromp)
125	int f;
126	struct sockaddr_in *fromp;
127	{
128	char cmdbuf[NCARGS+1], cp, namep;
129	char user[16], pass[16];
130	struct passwd *pwd;
131	int s;
132	u_short port;
133	int pv[2], pid, ready, readfrom, cc;
134	char buf[BUFSIZ], sig;
135	int one = 1;
136
137	(void) signal(SIGINT, SIG_DFL);
138	(void) signal(SIGQUIT, SIG_DFL);
139	(void) signal(SIGTERM, SIG_DFL);
140	#ifdef DEBUG
141	{ int t = open(_PATH_TTY, 2);
142	if (t >= 0) {
143	ioctl(t, TIOCNOTTY, (char *)0);
144	(void) close(t);
145	}
146	}
147	#endif
148	dup2(f, 0);
149	dup2(f, 1);
150	dup2(f, 2);
151	(void) alarm(60);
152	port = 0;
153	for (;;) {
154	char c;
155	if (read(f, &c, 1) != 1)
156	exit(1);
157	if (c == 0)
158	break;
159	port = port * 10 + c - '0';
160	}
161	(void) alarm(0);
162	if (port != 0) {
163	s = socket(AF_INET, SOCK_STREAM, 0);
164	if (s < 0)
165	exit(1);
166	if (bind(s, (struct sockaddr *)&asin, sizeof (asin)) < 0)
167	exit(1);
168	(void) alarm(60);
169	fromp->sin_port = htons(port);
170	if (connect(s, (struct sockaddr )fromp, sizeof (fromp)) < 0)
171	exit(1);
172	(void) alarm(0);
173	}
174	getstr(user, sizeof(user), "username");
175	getstr(pass, sizeof(pass), "password");
176	getstr(cmdbuf, sizeof(cmdbuf), "command");
177	setpwent();
178	pwd = getpwnam(user);
179	if (pwd == NULL) {
180	error("Login incorrect.\n");
181	exit(1);
182	}
183	endpwent();
184	if (*pwd->pw_passwd != '\0') {
185	namep = crypt(pass, pwd->pw_passwd);
186	if (strcmp(namep, pwd->pw_passwd)) {
187	error("Password incorrect.\n");
188	exit(1);
189	}
190	}
191	if (chdir(pwd->pw_dir) < 0) {
192	error("No remote directory.\n");
193	exit(1);
194	}
195	(void) write(2, "\0", 1);
196	if (port) {
197	(void) pipe(pv);
198	pid = fork();
199	if (pid == -1) {
200	error("Try again.\n");
201	exit(1);
202	}
203	if (pid) {
204	(void) close(0); (void) close(1); (void) close(2);
205	(void) close(f); (void) close(pv[1]);
206	readfrom = (1<<s) \| (1<<pv[0]);
207	ioctl(pv[1], FIONBIO, (char *)&one);
208	/* should set s nbio! */
209	do {
210	ready = readfrom;
211	(void) select(16, (fd_set *)&ready,
212	(fd_set )NULL, (fd_set )NULL,
213	(struct timeval *)NULL);
214	if (ready & (1<<s)) {
215	if (read(s, &sig, 1) <= 0)
216	readfrom &= ~(1<<s);
217	else
218	killpg(pid, sig);
219	}
220	if (ready & (1<<pv[0])) {
221	cc = read(pv[0], buf, sizeof (buf));
222	if (cc <= 0) {
223	shutdown(s, 1+1);
224	readfrom &= ~(1<<pv[0]);
225	} else
226	(void) write(s, buf, cc);
227	}
228	} while (readfrom);
229	exit(0);
230	}
231	setpgrp(0, getpid());
232	(void) close(s); (void)close(pv[0]);
233	dup2(pv[1], 2);
234	}
235	if (*pwd->pw_shell == '\0')
236	pwd->pw_shell = _PATH_BSHELL;
237	if (f > 2)
238	(void) close(f);
239	(void) setgid((gid_t)pwd->pw_gid);
240	initgroups(pwd->pw_name, pwd->pw_gid);
241	(void) setuid((uid_t)pwd->pw_uid);
242	(void)strcat(path, _PATH_DEFPATH);
243	environ = envinit;
244	strncat(homedir, pwd->pw_dir, sizeof(homedir)-6);
245	strncat(shell, pwd->pw_shell, sizeof(shell)-7);
246	strncat(username, pwd->pw_name, sizeof(username)-6);
247	cp = strrchr(pwd->pw_shell, '/');
248	if (cp)
249	cp++;
250	else
251	cp = pwd->pw_shell;
252	execl(pwd->pw_shell, cp, "-c", cmdbuf, 0);
253	perror(pwd->pw_shell);
254	exit(1);
255	}
256
257	/VARARGS1/
258	error(fmt, a1, a2, a3)
259	char *fmt;
260	int a1, a2, a3;
261	{
262	char buf[BUFSIZ];
263
264	buf[0] = 1;
265	(void) sprintf(buf+1, fmt, a1, a2, a3);
266	(void) write(2, buf, strlen(buf));
267	}
268
269	getstr(buf, cnt, err)
270	char *buf;
271	int cnt;
272	char *err;
273	{
274	char c;
275
276	do {
277	if (read(0, &c, 1) != 1)
278	exit(1);
279	*buf++ = c;
280	if (--cnt == 0) {
281	error("%s too long\n", err);
282	exit(1);
283	}
284	} while (c != 0);
285	}