new copyright notice
[unix-history] / usr / src / lib / libcompat / 4.3 / rexec.c
/*
* Copyright (c) 1980 Regents of the University of California.
* All rights reserved.
*
* %sccs.include.redist.c%
*/
#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)rexec.c 5.8 (Berkeley) %G%";
#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 <errno.h>
extern errno;
char *index();
int rexecoptions;
char *getpass(), *getlogin();
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_port = rport;
bcopy(hp->h_addr, (caddr_t)&sin.sin_addr, hp->h_length);
if (connect(s, &sin, sizeof(sin)) < 0) {
if (errno == ECONNREFUSED && timo <= 16) {
(void) close(s);
sleep(timo);
timo *= 2;
goto retry;
}
perror(hp->h_name);
return (-1);
}
if (fd2p == 0) {
(void) write(s, "", 1);
port = 0;
} 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, (char *)&sin2, &sin2len) < 0 ||
sin2len != sizeof (sin2)) {
perror("getsockname");
(void) close(s2);
goto bad;
}
port = ntohs((u_short)sin2.sin_port);
(void) sprintf(num, "%u", port);
(void) write(s, num, strlen(num)+1);
{ int len = sizeof (from);
s3 = accept(s2, &from, &len, 0);
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);
}