156 lines
4.3 KiB
C
156 lines
4.3 KiB
C
/*
|
|
* Copyright (c) 1980, 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.
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
#if defined(LIBC_SCCS) && !defined(lint)
|
|
#if 0
|
|
static char sccsid[] = "@(#)rexec.c 8.1 (Berkeley) 6/4/93";
|
|
#else
|
|
__RCSID("$NetBSD: rexec.c,v 1.6 1997/10/09 10:21:00 lukem Exp $");
|
|
#endif
|
|
#endif /* LIBC_SCCS and not lint */
|
|
|
|
#include <sys/types.h>
|
|
#include <sys/socket.h>
|
|
|
|
#include <netinet/in.h>
|
|
|
|
#include <stdio.h>
|
|
#include <netdb.h>
|
|
#include <string.h>
|
|
#include <errno.h>
|
|
#include <unistd.h>
|
|
|
|
int rexecoptions;
|
|
|
|
void ruserpass __P((const char *, char **, char **));
|
|
int rexec __P((char **, int, char *, char *, char *, int *));
|
|
|
|
int
|
|
rexec(ahost, rport, name, pass, cmd, fd2p)
|
|
char **ahost;
|
|
int rport;
|
|
char *name, *pass, *cmd;
|
|
int *fd2p;
|
|
{
|
|
struct sockaddr_in sin, sin2, from;
|
|
struct hostent *hp;
|
|
u_short port;
|
|
int s, timo = 1, s3;
|
|
char c;
|
|
|
|
hp = gethostbyname(*ahost);
|
|
if (hp == 0) {
|
|
herror(*ahost);
|
|
return (-1);
|
|
}
|
|
*ahost = hp->h_name;
|
|
ruserpass(hp->h_name, &name, &pass);
|
|
retry:
|
|
s = socket(AF_INET, SOCK_STREAM, 0);
|
|
if (s < 0) {
|
|
perror("rexec: socket");
|
|
return (-1);
|
|
}
|
|
sin.sin_family = hp->h_addrtype;
|
|
sin.sin_len = sizeof(sin);
|
|
sin.sin_port = rport;
|
|
bcopy(hp->h_addr, (caddr_t)&sin.sin_addr, hp->h_length);
|
|
if (connect(s, (struct sockaddr *)&sin, sizeof(sin)) < 0) {
|
|
if (errno == ECONNREFUSED && timo <= 16) {
|
|
(void) close(s);
|
|
sleep(timo);
|
|
timo *= 2;
|
|
goto retry;
|
|
}
|
|
perror(hp->h_name);
|
|
return (-1);
|
|
}
|
|
port = 0;
|
|
if (fd2p == 0) {
|
|
(void) write(s, "", 1);
|
|
} else {
|
|
char num[8];
|
|
int s2, sin2len;
|
|
|
|
s2 = socket(AF_INET, SOCK_STREAM, 0);
|
|
if (s2 < 0) {
|
|
(void) close(s);
|
|
return (-1);
|
|
}
|
|
listen(s2, 1);
|
|
sin2len = sizeof (sin2);
|
|
if (getsockname(s2, (struct sockaddr *)&sin2, &sin2len) < 0 ||
|
|
sin2len != sizeof (sin2)) {
|
|
perror("getsockname");
|
|
(void) close(s2);
|
|
goto bad;
|
|
}
|
|
port = ntohs((u_short)sin2.sin_port);
|
|
(void)snprintf(num, sizeof num, "%u", port);
|
|
(void) write(s, num, strlen(num)+1);
|
|
{ int len = sizeof (from);
|
|
s3 = accept(s2, (struct sockaddr *)&from, &len);
|
|
close(s2);
|
|
if (s3 < 0) {
|
|
perror("accept");
|
|
port = 0;
|
|
goto bad;
|
|
}
|
|
}
|
|
*fd2p = s3;
|
|
}
|
|
(void) write(s, name, strlen(name) + 1);
|
|
/* should public key encypt the password here */
|
|
(void) write(s, pass, strlen(pass) + 1);
|
|
(void) write(s, cmd, strlen(cmd) + 1);
|
|
if (read(s, &c, 1) != 1) {
|
|
perror(*ahost);
|
|
goto bad;
|
|
}
|
|
if (c != 0) {
|
|
while (read(s, &c, 1) == 1) {
|
|
(void) write(2, &c, 1);
|
|
if (c == '\n')
|
|
break;
|
|
}
|
|
goto bad;
|
|
}
|
|
return (s);
|
|
bad:
|
|
if (port)
|
|
(void) close(*fd2p);
|
|
(void) close(s);
|
|
return (-1);
|
|
}
|